@article{HijaziKoenigSchneideretal.,
  author    = {Hijazi, Ihab Hamzi and K{\"o}nig, Reinhard and Schneider, Sven and Li, Xin and Bielik, Martin and Schmitt, Gerhard and Donath, Dirk},
  title     = {Geostatistical Analysis for the Study of Relationships between the Emotional Responses of Urban Walkers to Urban Spaces},
  series = {International Journal of E-Planning Research},
  journal   = {International Journal of E-Planning Research},
  doi       = {10.25643/bauhaus-universitaet.2602},
  url       = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20160622-26025},
  pages     = {1 -- 19},
  abstract  = {The described study aims to find correlations between urban spatial configurations and human emotions. To this end, the authors measured people's emotions while they walk along a path in an urban area using an instrument that measures skin conductance and skin temperature. The corresponding locations of the test persons were measured recorded by using a GPS-tracker (n=13). The results are interpreted and categorized as measures for positive and negative emotional arousal. To evaluate the technical and methodological process. The test results offer initial evidence that certain spaces or spatial sequences do cause positive or negative emotional arousal while others are relatively neutral. To achieve the goal of the study, the outcome was used as a basis for the study of testing correlations between people's emotional responses and urban spatial configurations represented by Isovist properties of the urban form. By using their model the authors can explain negative emotional arousal for certain places, but they couldn't find a model to predict emotional responses for individual spatial configurations.},
  subject      = {Geografie},
  language  = {en}
}
@book{KoenigSchneiderKnecht,
  author    = {K{\"o}nig, Reinhard and Schneider, Sven and Knecht, Katja},
  title     = {KREMLAS: Entwicklung einer kreativen evolution{\"a}ren Entwurfsmethode f{\"u}r Layoutprobleme in Architektur und St{\"a}dtebau},
  editor    = {K{\"o}nig, Reinhard and Donath, Dirk and Petzold, Frank},
  publisher = {Verlag der Bauhaus-Universit{\"a}t Weimar},
  address   = {Weimar},
  isbn      = {978-3-86068-471-9},
  doi       = {10.25643/bauhaus-universitaet.1650},
  url       = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20120509-16504},
  pages     = {211},
  abstract  = {Die im vorliegenden Buch dokumentierten Untersuchungen befassen sich mit der Entwicklung von Methoden zur algorithmischen L{\"o}sung von Layoutaufgaben im architektonischen Kontext. Layout bezeichnet hier die gestalterisch und funktional sinnvolle Anordnung r{\"a}umlicher Elemente, z.B. von Parzellen, Geb{\"a}uden, R{\"a}umen auf bestimmten Maßstabsebenen. Die vorliegenden Untersuchungen sind im Rahmen eines von der Deutschen Forschungsgemeinschaft gef{\"o}rderten Forschungsprojekts entstanden.},
  subject      = {Grundriss},
  language  = {de}
}
@phdthesis{Wieteska,
  author    = {Wieteska, Marcin},
  title     = {Untersuchungen zur Optimierung des Feuerwiderstandsverhaltens von Gipsplatten},
  publisher = {Marcin Wieteska},
  address   = {Warszawa},
  isbn      = {978-83-936473-0-9},
  doi       = {10.25643/bauhaus-universitaet.1782},
  url       = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20121207-17829},
  school      = {Bauhaus-Universit{\"a}t Weimar},
  pages     = {176},
  abstract  = {Die Qualit{\"a}t von Beplankungselementen wirkt sich deutlich auf den Feuerwiderstand von Metallst{\"a}nder-Wandkonstruktionen aus. Daher wurde im Rahmen dieser Arbeit der Einfluss von Zus{\"a}tzen in Gipsplatten bez{\"u}glich einer m{\"o}glichen Verbesserung dieser Eigenschaft untersucht. Zu diesem Zweck wurden spezielle, den jeweiligen Untersuchungsbedingungen angepasste Probek{\"o}rper unter Verwendung verschiedenster Zus{\"a}tze gefertigt. Die Beurteilung deren Auswirkungen erfolgte insbesondere mittels nachfolgender f{\"u}nf Kriterien: 1) dem Zeitpunkt der Temperaturerh{\"o}hung nach der Probek{\"o}rperentw{\"a}sserung, 2) dem Maximalwert der Plattenr{\"u}ckseitentemperatur, 3) der Gr{\"o}ße und der Anzahl der Risse, 4) der Plattenstabilit{\"a}t nach der W{\"a}rmebeanspruchung, 5) der Verk{\"u}rzung von prismatischen Probek{\"o}rpern. Besonders wichtig war hierbei die Charakterisierung der Auswirkungen einer simulierten Brandbeanspruchung von 970 °C {\"u}ber 90 Minuten auf Labor-Gipsplatten. Dabei wurde die Temperatur{\"a}nderung auf der Plattenr{\"u}ckseite {\"u}ber den gesamten Pr{\"u}fzeitraum kontinuierlich erfasst. Die Bewertung des Zusammenhalts der Platten nach der thermischen Beanspruchung erfolgte erstmals quantitativ {\"u}ber Anzahl und Gr{\"o}ße der an den Proben entstandenen Risse. Urs{\"a}chlich f{\"u}r die Rissbildung ist die Verringerung des Probek{\"o}rpervolumens infolge des ausgetriebenen Kristallwassers. Da dieser Parameter im Plattenversuch nicht bestimmt werden kann, wurde erg{\"a}nzend das L{\"a}ngen{\"a}nderungsverhalten von Prismen im Ergebnis einer 90min{\"u}tigen Temperung bei 1000 °C im Muffelofen ermittelt. Besonders vorteilhaft hat sich die Zugabe von 80 g/m2 Glasfasern und 7,75 \% Kalksteinmehl auf das Verhalten von Gipsplatten bei Brandbeanspruchung ausgewirkt. Diese Verbesserung ist insbesondere auf h{\"o}here Stabilit{\"a}t und geringere Schrumpfung der Gipsplatte zur{\"u}ckzuf{\"u}hren. Basierend auf den im Labormaßstab erhaltenen Ergebnissen wurden Rezepturvorschl{\"a}ge zur Verbesserung des Feuerwiderstandsverhaltens von Gipsplatten unter Praxisbedingungen entwickelt. Die Herstellung der erforderlichen großformatigen Platten erfolgte auf der Bandstraße der Knauf Gips KG. Diese Platten wurden als Wandkonstruktion mit zweilagiger Beplankung einer großtechnischen Pr{\"u}fung erfolgreich unterzogen. Eine geringere Durchbiegung der Wandkonstruktion, eine verminderte Volumenreduzierung der Platten sowie eine erh{\"o}hte Plattenstabilit{\"a}t belegen die verbesserten Eigenschaften dieser modifizierten Feuerschutzplatte. Weitere durchgef{\"u}hrte Untersuchungen ergaben, dass es unerheblich ist, ob die Platten auf Basis von Natur- oder REA-Gips bzw. mit hohem oder niedrigem Fl{\"a}chengewicht gefertigt wurden. Das eindeutig beste Ergebnis mit einer Feuerwiderstandsdauer von 118 Minuten hat eine Wandkonstruktion aus Feuerschutzplatten auf Basis eines Stuckgipses aus 100 \% REA-Gips mit einem Anteil von 83,9 g/m2 Glasfasern und 1 \% Vermiculit und einem Fl{\"a}chengewicht von 10,77 kg/m2, bei einer Plattenst{\"a}rke von 12,5 mm. Die als Ziel vorgebende Feuerwiderstandsdauer von 120 Minuten bei zweilagiger Beplankung ohne D{\"a}mmstoff k{\"o}nnte k{\"u}nftig erreicht werden, wenn es gelingt, die Volumenreduzierung noch besser zu kompensieren und die Plattenstabilit{\"a}t zu steigern. Eine M{\"o}glichkeit hierzu ist die Substitution der beidseitigen Kartonlagen durch eine Glasfaser-Vliesummantelung. Die Wandkonstruktion W112 ohne D{\"a}mmstoff erreicht dabei eine Feuerwiderstandsdauer von weit {\"u}ber 120 Minuten, wobei der Gipskern mit Glasfasern armiert ist.},
  subject      = {0947},
  language  = {de}
}
@phdthesis{Mueller,
  author    = {M{\"u}ller, Matthias},
  title     = {Frost-Tausalz-Angriff auf Beton - Neue Erkenntnisse zum Schadensmechanismus},
  doi       = {10.25643/bauhaus-universitaet.4502},
  url       = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20210922-45025},
  school      = {Bauhaus-Universit{\"a}t Weimar},
  pages     = {226},
  abstract  = {F{\"u}r die Verminderung der betonspezifischen CO2-Emissionen wird ein verst{\"a}rkter Einsatz klinkerreduzierter Zemente bzw. Betone angestrebt. Die Reduzierung des Klinkergehaltes darf jedoch nicht zu einer lebensdauerrelevanten Beeintr{\"a}chtigung der Betondauerhaftigkeit f{\"u}hren. In diesem Zusammenhang stellt der Frost-Tausalz-Widerstand eine kritische Gr{\"o}ße dar, da er bei h{\"o}heren Klinkersubstitutionsraten h{\"a}ufig negativ beeinflusst wird. Erschwerend kommt hinzu, dass f{\"u}r klinkerreduzierte Betone nur ein unzureichender Erfahrungsschatz vorliegt. Ein hoher Frost-Tausalz-Widerstand kann daher nicht ausschließlich anhand deskriptiver Vorgaben gew{\"a}hrleistet werden. Demgem{\"a}ß sollte perspektivisch auch f{\"u}r frost-tausalzbeanspruchte Bauteile eine performancebasierte Lebensdauerbetrachtung erfolgen. Eine unverzichtbare Grundlage f{\"u}r das Erreichen dieser Ziele ist ein Verst{\"a}ndnis f{\"u}r die Schadensvorg{\"a}nge beim Frost-Tausalz-Angriff. Der Forschungsstand ist jedoch gepr{\"a}gt von widerspr{\"u}chlichen Schadenstheorien. Somit wurde als Zielstellung f{\"u}r diese Arbeit abgeleitet, die existierenden Schadenstheorien unter Ber{\"u}cksichtigung des aktuellen Wissensstandes zu bewerten und mit eigenen Untersuchungen zu pr{\"u}fen und einzuordnen. Die Sichtung des Forschungsstandes zeigte, dass nur zwei Theorien das Potential haben, den Frost-Tausalz-Angriff umfassend abzubilden - die Glue Spall Theorie und die Cryogenic Suction Theorie. Die Glue Spall Theorie f{\"u}hrt die Entstehung von Abwitterungen auf die mechanische Sch{\"a}digung der Betonoberfl{\"a}che durch eine anhaftende Eisschicht zur{\"u}ck. Dabei sollen nur bei moderaten Tausalzkonzentrationen in der einwirkenden L{\"o}sung kritische Spannungszust{\"a}nde in der Eisschicht auftreten, die eine Sch{\"a}digung der Betonoberfl{\"a}che hervorrufen k{\"o}nnen. In dieser Arbeit konnte jedoch nachgewiesen werden, dass starke Abwitterungen auch bei Tausalz¬konzentrationen auftreten, bei denen eine mechanische Sch{\"a}digung des Betons durch das Eis auszuschließen ist. Damit wurde die fehlende Eignung der Glue Spall Theorie aufgezeigt. Die Cryogenic Suction Theorie fußt auf den eutektischen Eigenschaften von Tausalz-l{\"o}sungen, die im gefrorenen Zustand immer als Mischung auf festem Wassereis und fl{\"u}ssiger, hochkonzentrierter Salzl{\"o}sung bestehen, solange ihre Eutektikumstemperatur nicht unter¬schritten wird. Die fl{\"u}ssige Phase im salzhaltigen Eis stellt f{\"u}r gefrorenen Beton ein bisher nicht ber{\"u}cksichtigtes Fl{\"u}ssigkeitsreservoir dar, welches trotz der hohen Salzkonzentration die Eisbildung in der Betonrandzone verst{\"a}rken und so die Entstehung von Abwitterungen verursachen soll. In dieser Arbeit wurde best{\"a}tigt, dass die Eisbildung im Zementstein beim Gefrieren in hochkonzentrierter Tausalzl{\"o}sung tats{\"a}chlich verst{\"a}rkt wird. Das Ausmaß der zus{\"a}tzlichen Eisbildung wurde dabei auch von der F{\"a}higkeit des Zementsteins zur Bindung von Chloridionen aus der Tausalzl{\"o}sung beeinflusst. Zusammenfassend wurde festgestellt, dass die Cryogenic Suction Theorie eine gute Beschreibung des Frost-Tausalz-Angriffes darstellt, aber um weitere Aspekte erg{\"a}nzt werden muss. Die Ber{\"u}cksichtigung der intensiven S{\"a}ttigung von Beton durch den Prozess der Mikroeislinsenpumpe stellt hier die wichtigste Erweiterung dar. Basierend auf dieser {\"U}berlegung wurde eine kombinierte Schadenstheorie aufgestellt. Wichtige Annahmen dieser Theorie konnten experimentell best{\"a}tigt werden. Im Ergebnis wurde so die Grundlage f{\"u}r ein tiefergehendes Verst{\"a}ndnis des Frost-Tausalz-Angriffes geschaffen. Zudem wurde ein neuer Ansatz identifiziert, um die (potentielle) Verringerung des Frost-Tausalz-Widerstandes klinkerreduzierter Betone zu erkl{\"a}ren.},
  subject      = {Beton},
  language  = {de}
}
@phdthesis{Fauth,
  author    = {Fauth, Judith},
  title     = {Ein handlungsorientiertes Entscheidungsmodell zur Feststellung der Genehmigungsf{\"a}higkeit von Bauvorhaben},
  publisher = {Bauhaus-Universit{\"a}tsverlag},
  address   = {Ilmtal-Weinstraße},
  isbn      = {978-3-95773-299-6},
  doi       = {10.25643/bauhaus-universitaet.4509},
  url       = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20210928-45093},
  school      = {Bauhaus-Universit{\"a}t Weimar},
  pages     = {318},
  abstract  = {Die Auseinandersetzung mit der Digitalisierung ist in den letzten Jahren in den Medien, auf Konferenzen und in Aussch{\"u}ssen der Bau- und Immobilienbranche angekommen. W{\"a}hrend manche Bereiche Neuerungen hervorbringen und einige Akteure als Pioniere zu bezeichnen sind, weisen andere Themen noch Defizite hinsichtlich der digitalen Transformation auf. Zu dieser Kategorie kann auch das Baugenehmigungsverfahren gez{\"a}hlt werden. Unabh{\"a}ngig davon, wie Architekten und Ingenieure in den Planungsb{\"u}ros auf innovative Methoden setzen, bleiben die Bauvorlagen bisher zuhauf in Papierform oder werden nach der elektronischen Einreichung in der Beh{\"o}rde ausgedruckt. Vorhandene Ressourcen, beispielsweise in Form eines Bauwerksinformationsmodells, die Unterst{\"u}tzung bei der Baugenehmigungsfeststellung bieten k{\"o}nnen, werden nicht ausgesch{\"o}pft. Um mit digitalen Werkzeugen eine Entscheidungshilfe f{\"u}r die Baugenehmigungsbeh{\"o}rden zu erarbeiten, ist es notwendig, den Ist-Zustand zu verstehen und Gegebenheiten zu hinterfragen, bevor eine Gesamtautomatisierung der innerbeh{\"o}rdlichen Vorg{\"a}nge als alleinige L{\"o}sung zu verfolgen ist. Mit einer inhaltlich-organisatorischen Betrachtung der relevanten Bereiche, die Einfluss auf die Baugenehmigungsfeststellung nehmen, wird eine Optimierung des Baugenehmigungsverfahrens in den Beh{\"o}rden angestrebt. Es werden die komplexen Bereiche, wie die Gesetzeslage, der Einsatz von Technologie aber auch die subjektiven Handlungsalternativen, ermittelt und strukturiert. Mit der Entwicklung eines Modells zur Feststellung der Baugenehmigungsf{\"a}higkeit wird sowohl ein Verst{\"a}ndnis f{\"u}r Einflussfaktoren vermittelt als auch eine Transparenzsteigerung f{\"u}r alle Beteiligten geschaffen. Neben einer internationalen Literaturrecherche diente eine empirische Studie als Untersuchungsmethode. Die empirische Studie wurde in Form von qualitativen Experteninterviews durchgef{\"u}hrt, um den Ist-Zustand im Bereich der Baugenehmigungsverfahren festzustellen. Das erhobene Datenmaterial wurde aufbereitet und anschließend einer softwaregest{\"u}tzten Inhaltsanalyse unterzogen. Die Ergebnisse wurden in Kombination mit den Erkenntnissen der Literaturrecherche in verschiedenen Analysen als Modellgrundlage aufgearbeitet. Ergebnis der Untersuchung stellt ein Entscheidungsmodell dar, welches eine L{\"u}cke zwischen den gegenw{\"a}rtigen Abl{\"a}ufen in den Baubeh{\"o}rden und einer Gesamtautomatisierung der Baugenehmigungspr{\"u}fung schließt. Die prozessorientierte Strukturierung entscheidungsrelevanter Sachverhalte im Modell erm{\"o}glicht eine Unterst{\"u}tzung bei der Baugenehmigungsfeststellung f{\"u}r Pr{\"u}fer und Antragsteller. Das theoretische Modell konnte in Form einer Webanwendung in die Praxis {\"u}bertragen werden.},
  subject      = {Baugenehmigung},
  language  = {de}
}
@phdthesis{Hoerold,
  author    = {H{\"o}rold, Stefan},
  title     = {Leistungsbezogene Musterjahresganglinien f{\"u}r den Straßenbetriebsdienst},
  doi       = {10.25643/bauhaus-universitaet.4491},
  url       = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20210830-44910},
  school      = {Bauhaus-Universit{\"a}t Weimar},
  pages     = {124},
  abstract  = {In den letzten Jahrzehnten unterlag der Straßenbetriebsdienst tiefgreifenden Ver{\"a}nderungen. Diese Ver{\"a}nderungen schließt auch die betriebliche Steuerungsphilosophie ein, um eine planungsrationale und {\"o}konomische Gestaltung des Straßenbetriebsdienstes zu unterst{\"u}tzen. Dabei erfolgt eine verbindliche Vorgabe der Leistungsinhalte und -umf{\"a}nge und erm{\"o}glicht eine Budgetierung f{\"u}r das vorgesehene Jahresarbeitsprogramm. Ziel der Untersuchung ist die Entwicklung eines Modells f{\"u}r die Ermittlung von leistungsbezogenen Musterjahresganglinien zur Unterst{\"u}tzung der Jahresarbeitsplanung. Daf{\"u}r lagen f{\"u}r jede Leistung des Leistungsbereiches „Gr{\"u}npflege" jeweils 260 einzelne Jahresganglinien vor. Im Ergebnis der Untersuchung wird die leistungsbezogene Musterjahresganglinie in vier Schritten ermittelt. Im ersten Schritt erfolgt die Pr{\"u}fung der Datenqualit{\"a}t; im zweiten Schritt eine Korrelationsanalyse; im dritten Schritt die fachliche {\"U}berpr{\"u}fung der Leistungsauspr{\"a}gung und im vierten Schritt die Ermittlung der leistungsbezogenen Musterjahresganglinie aus den verbliebenen leistungsbezogenen Jahresganglinien.},
  subject      = {Straßenbetriebsdienst},
  language  = {de}
}
@phdthesis{Fauth,
  author    = {Fauth, Judith},
  title     = {A process-oriented decision model for determining the permitability of construction projects},
  doi       = {10.25643/bauhaus-universitaet.4602},
  url       = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20220309-46020},
  school      = {Bauhaus-Universit{\"a}t Weimar},
  pages     = {325},
  abstract  = {In recent years, the discussion of digitalization has arrived in the media, at conferences, and in committees of the construction and real estate industry. While some areas are producing innovations and some contributors can be described as pioneers, other topics still show deficits with regard to digital transformation. The building permit process can also be counted in this category. Regardless of how architects and engineers in planning offices rely on innovative methods, building documents have so far remained in paper form in too many cases, or are printed out after electronic submission to the authority. Existing resources - for example in the form of a building information model, which could provide support in the building permit process - are not being taken advantage of. In order to use digital tools to support decision-making by the building permit authorities, it is necessary to understand the current situation and to question conditions before pursuing the overall automation of internal authority processes as the sole solution. With a substantive-organizational consideration of the relevant areas that influence building permit determination, an improvement of the building permit procedure within authorities is proposed. Complex areas - such as legal situations, the use of technology, as well as the subjective alternative action - are determined and structured. With the development of a model for the determination of building permitability, both an understanding of influencing factors is conveyed and an increase in transparency for all parties involved is created. In addition to an international literature review, an empirical study served as the research method. The empirical study was conducted in the form of qualitative expert interviews in order to determine the current state in the field of building permit procedures. The collected data material was processed and subsequently subjected to a software-supported content analysis. The results were processed, in combination with findings from the literature review, in various analyses to form the basis for a proposed model. The result of the study is a decision model that closes the gap between the current processes within the building authorities and an overall automation of the building permit review process. The model offers support to examiners and applicants in determining building permit eligibility, through its process-oriented structuring of decision-relevant facts. The theoretical model could be transferred into practice in the form of a web application.},
  subject      = {Baugenehmigung},
  language  = {en}
}
@phdthesis{Jaouadi,
  author    = {Jaouadi, Zouhour},
  title     = {Pareto and Reliability-Oriented Aeroelastic Shape Optimization of Bridge Decks},
  doi       = {10.25643/bauhaus-universitaet.4935},
  url       = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20230303-49352},
  school      = {Bauhaus-Universit{\"a}t Weimar},
  pages     = {167},
  abstract  = {Due to the development of new technologies and materials, optimized bridge design has recently gained more attention. The aim is to reduce the bridge components materials and the CO2 emission from the cement manufacturing process. Thus, most long-span bridges are designed to be with high flexibility, low structural damping, and longer and slender spans. Such designs lead, however, to aeroelastic challenges. Moreover, the consideration of both the structural and aeroelastic behavior in bridges leads to contradictory solutions as the structural constraints lead to deck prototypes with high depth which provide high inertia to material volume ratios. On the other hand, considering solely the aerodynamic requirements, slender airfoil-shaped bridge box girders are recommended since they prevent vortex shedding and exhibit minimum drag. Within this framework comes this study which provides approaches to find optimal bridge deck cross-sections while considering the aerodynamic effects. Shape optimization of deck cross-section is usually formulated to minimize the amount of material by finding adequate parameters such as the depth, the height, and the thickness and while ensuring the overall stability of the structure by the application of some constraints. Codes and studies have been implemented to analyze the wind phenomena and the structural responses towards bridge deck cross-sections where simplifications have been adopted due to the complexity and the uniqueness of such components besides the difficulty of obtaining a final model of the aerodynamic behavior. In this thesis, two main perspectives have been studied; the first is fully deterministic and presents a novel framework on generating optimal aerodynamic shapes for streamlined and trapezoidal cross-sections based on the meta-modeling approach. Single and multi-objective optimizations were both carried out and a Pareto Front is generated. The performance of the optimal designs is checked afterwards. In the second part, a new strategy based on Reliability-Based Design Optimization (RBDO) to mitigate the vortex-induced vibration (VIV) on the Trans-Tokyo Bay bridge is proposed. Small changes in the leading and trailing edges are presented and uncertainties are considered in the structural system. Probabilistic constraints based on polynomial regression are evaluated and the problem is solved while applying the Reliability Index Approach (RIA) and the Performance Measure Approach (PMA). The results obtained in the first part showed that the aspect ratio has a significant effect on the aerodynamic behavior where deeper cross-sections have lower resistance against flutter and should be avoided. In the second part, the adopted RBDO approach succeeded to mitigate the VIV, and it is proven that designs with narrow or prolonged bottom-base length and featuring an abrupt surface change in the leading and trailing edges can lead to high vertical vibration amplitude. It is expected that this research will help engineers with the selections of the adequate deck cross-section layout, and encourage researchers to apply concepts of optimization regarding this field and develop the presented approaches for further studies.},
  subject      = {Gestaltoptimierung},
  language  = {en}
}
@phdthesis{Alkam,
  author    = {Alkam, Feras},
  title     = {Vibration-based Monitoring of Concrete Catenary Poles using Bayesian Inference},
  volume    = {2021},
  publisher = {Bauhaus-Universit{\"a}tsverlag},
  address   = {Weimar},
  doi       = {10.25643/bauhaus-universitaet.4433},
  url       = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20210526-44338},
  school      = {Bauhaus-Universit{\"a}t Weimar},
  pages     = {177},
  abstract  = {This work presents a robust status monitoring approach for detecting damage in cantilever structures based on logistic functions. Also, a stochastic damage identification approach based on changes of eigenfrequencies is proposed. The proposed algorithms are verified using catenary poles of electrified railways track. The proposed damage features overcome the limitation of frequency-based damage identification methods available in the literature, which are valid to detect damage in structures to Level 1 only. Changes in eigenfrequencies of cantilever structures are enough to identify possible local damage at Level 3, i.e., to cover damage detection, localization, and quantification. The proposed algorithms identified the damage with relatively small errors, even at a high noise level.},
  subject      = {Parameteridentifikation},
  language  = {en}
}
@phdthesis{Bianco,
  author    = {Bianco, Marcelo Jos{\´e}},
  title     = {Coupling between Shell and Generalized Beam Theory (GBT) elements},
  doi       = {10.25643/bauhaus-universitaet.4391},
  url       = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20210315-43914},
  school      = {Bauhaus-Universit{\"a}t Weimar},
  pages     = {265},
  abstract  = {In the last decades, Finite Element Method has become the main method in statics and dynamics analysis in engineering practice. For current problems, this method provides a faster, more flexible solution than the analytic approach. Prognoses of complex engineer problems that used to be almost impossible to solve are now feasible. Although the finite element method is a robust tool, it leads to new questions about engineering solutions. Among these new problems, it is possible to divide into two major groups: the first group is regarding computer performance; the second one is related to understanding the digital solution. Simultaneously with the development of the finite element method for numerical solutions, a theory between beam theory and shell theory was developed: Generalized Beam Theory, GBT. This theory has not only a systematic and analytical clear presentation of complicated structural problems, but also a compact and elegant calculation approach that can improve computer performance. Regrettably, GBT was not internationally known since the most publications of this theory were written in German, especially in the first years. Only in recent years, GBT has gradually become a fertile research topic, with developments from linear to non-linear analysis. Another reason for the misuse of GBT is the isolated application of the theory. Although recently researches apply finite element method to solve the GBT's problems numerically, the coupling between finite elements of GBT and other theories (shell, solid, etc) is not the subject of previous research. Thus, the main goal of this dissertation is the coupling between GBT and shell/membrane elements. Consequently, one achieves the benefits of both sides: the versatility of shell elements with the high performance of GBT elements. Based on the assumptions of GBT, this dissertation presents how the separation of variables leads to two calculation's domains of a beam structure: a cross-section modal analysis and the longitudinal amplification axis. Therefore, there is the possibility of applying the finite element method not only in the cross-section analysis, but also the development for an exact GBT's finite element in the longitudinal direction. For the cross-section analysis, this dissertation presents the solution of the quadratic eigenvalue problem with an original separation between plate and membrane mechanism. Subsequently, one obtains a clearer representation of the deformation mode, as well as a reduced quadratic eigenvalue problem. Concerning the longitudinal direction, this dissertation develops the novel exact elements, based on hyperbolic and trigonometric shape functions. Although these functions do not have trivial expressions, they provide a recursive procedure that allows periodic derivatives to systematise the development of stiffness matrices. Also, these shape functions enable a single-element discretisation of the beam structure and ensure a smooth stress field. From these developments, this dissertation achieves the formulation of its primary objective: the connection of GBT and shell elements in a mixed model. Based on the displacement field, it is possible to define the coupling equations applied in the master-slave method. Therefore, one can model the structural connections and joints with finite shell elements and the structural beams and columns with GBT finite element. As a side effect, the coupling equations limit the displacement field of the shell elements under the assumptions of GBT, in particular in the neighbourhood of the coupling cross-section. Although these side effects are almost unnoticeable in linear analysis, they lead to cumulative errors in non-linear analysis. Therefore, this thesis finishes with the evaluation of the mixed GBT-shell models in non-linear analysis.},
  subject      = {Biegetheorie},
  language  = {en}
}
@article{StaubachMachacekSkowroneketal.2020,
  author    = {Staubach, Patrick and Machacek, Jan and Skowronek, Josefine and Wichtmann, Torsten},
  title     = {Vibratory pile driving in water-saturated sand: Back-analysis of model tests using a hydro-mechanically coupled CEL method},
  series = {Soils and Foundations},
  volume    = {2021},
  journal   = {Soils and Foundations},
  number    = {Volume 61, Issue 1},
  publisher = {Elsevier, Science Direct},
  address   = {Amsterdam},
  doi       = {10.1016/j.sandf.2020.11.005},
  url       = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20210203-43571},
  pages     = {144 -- 159},
  year      = {2020},
  abstract  = {The development of a hydro-mechanically coupled Coupled-Eulerian-Lagrangian (CEL) method and its application to the back-analysisof vibratory pile driving model tests in water-saturated sand is presented. The predicted pile penetration using this approachis in good agreement with the results of the model tests as well as with fully Lagrangian simulations. In terms of pore water pressure, however, the results of the CEL simulation show a slightly worse accordance with the model tests compared to the Lagrangian simulation. Some shortcomings of the hydro-mechanically coupled CEL method in case of frictional contact problems and pore fluids with high bulk modulus are discussed. Lastly, the CEL method is applied to the simulation of vibratory driving of open-profile piles under partially drained conditions to study installation-induced changes in the soil state. It is concluded that the proposed method is capable of realistically reproducing the most important mechanisms in the soil during the driving process despite its addressed shortcomings.},
  subject      = {Plastische Deformation},
  language  = {en}
}
@phdthesis{Reshetnikova,
  author    = {Reshetnikova, Tatiana},
  title     = {Transformation of the Environment: Influence of "Urban Reagents." German and Russian Case Studies},
  doi       = {10.25643/bauhaus-universitaet.4351},
  url       = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20210128-43517},
  school      = {Bauhaus-Universit{\"a}t Weimar},
  pages     = {256 (thesis) + 23 (Folder) + 83 (CD)},
  abstract  = {An urban regeneration manifests itself through urban objects operating as change agents. The en-tailed diverse effects on the surroundings demonstrate experimental origin - an experiment as a preplanned but unpredictable method. An understanding of influences and features of urban ob-jects requires scrutiny due to a high potential of the elements to force an alteration and reactions. This dissertation explores the transformation of the milieu and mechanisms of this transformation.},
  subject      = {Stadtentwicklung},
  language  = {en}
}
@article{LashkarAraKalantariSheikhKhozanietal.,
  author    = {Lashkar-Ara, Babak and Kalantari, Niloofar and Sheikh Khozani, Zohreh and Mosavi, Amir},
  title     = {Assessing Machine Learning versus a Mathematical Model to Estimate the Transverse Shear Stress Distribution in a Rectangular Channel},
  series = {Mathematics},
  volume    = {2021},
  journal   = {Mathematics},
  number    = {Volume 9, Issue 6, Article 596},
  publisher = {MDPI},
  address   = {Basel},
  doi       = {10.3390/math9060596},
  url       = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20210504-44197},
  pages     = {15},
  abstract  = {One of the most important subjects of hydraulic engineering is the reliable estimation of the transverse distribution in the rectangular channel of bed and wall shear stresses. This study makes use of the Tsallis entropy, genetic programming (GP) and adaptive neuro-fuzzy inference system (ANFIS) methods to assess the shear stress distribution (SSD) in the rectangular channel. To evaluate the results of the Tsallis entropy, GP and ANFIS models, laboratory observations were used in which shear stress was measured using an optimized Preston tube. This is then used to measure the SSD in various aspect ratios in the rectangular channel. To investigate the shear stress percentage, 10 data series with a total of 112 different data for were used. The results of the sensitivity analysis show that the most influential parameter for the SSD in smooth rectangular channel is the dimensionless parameter B/H, Where the transverse coordinate is B, and the flow depth is H. With the parameters (b/B), (B/H) for the bed and (z/H), (B/H) for the wall as inputs, the modeling of the GP was better than the other one. Based on the analysis, it can be concluded that the use of GP and ANFIS algorithms is more effective in estimating shear stress in smooth rectangular channels than the Tsallis entropy-based equations.},
  subject      = {Maschinelles Lernen},
  language  = {en}
}
@phdthesis{Sproete,
  author    = {Spr{\"o}te, Daniel},
  title     = {Immobilienportfoliomanagement {\"o}ffentlicher musealer Schl{\"o}sserverwaltungen - Daten zur Investitionssteuerung},
  doi       = {10.25643/bauhaus-universitaet.4426},
  url       = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20210510-44260},
  school      = {Bauhaus-Universit{\"a}t Weimar},
  pages     = {220},
  abstract  = {Die Arbeit leistet einen wissenschaftlichen Beitrag zur Erforschung der Einsatzm{\"o}glichkeiten eines Immobilienportfoliomanagements f{\"u}r {\"o}ffentliche museale Schl{\"o}sserverwaltungen in Deutschland. Insbesondere wird ein f{\"u}r deren Organisation spezifisches Modell zur Investitionssteuerung herausgearbeitet und dessen Anwendbarkeit in der Praxis mit Experten diskutiert.},
  subject      = {Unbewegliche Sache},
  language  = {de}
}
@misc{Schuster,
  author    = {Schuster, Lara},
  title     = {Die Haltungen des Architekten Luigi Snozzi. Untersucht am Beispiel des Projektes Monte Carasso},
  volume    = {2021},
  publisher = {Lucia Verlag},
  address   = {Weimar},
  doi       = {10.25643/bauhaus-universitaet.4438},
  url       = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20210603-44386},
  pages     = {17},
  abstract  = {Welche Haltung spricht aus den Werken von Architekt*innen? Lassen sich Werte und Handlungsanweisungen von Mauern und Pl{\"a}nen ablesen? Luigi Snozzis Entw{\"u}rfe f{\"u}r Monte Carasso werden in dieser Arbeit exemplarisch darauf untersucht. Sie zeugen von der Verantwortung, die jede*r Architekt*in f{\"u}r das Umfeld hat, in dem sie oder er baut.},
  subject      = {Architektur},
  language  = {de}
}
@article{HarirchianKumariJadhavetal.,
  author    = {Harirchian, Ehsan and Kumari, Vandana and Jadhav, Kirti and Raj Das, Rohan and Rasulzade, Shahla and Lahmer, Tom},
  title     = {A Machine Learning Framework for Assessing Seismic Hazard Safety of Reinforced Concrete Buildings},
  series = {Applied Sciences},
  volume    = {2020},
  journal   = {Applied Sciences},
  number    = {Volume 10, issue 20, article 7153},
  publisher = {MDPI},
  address   = {Basel},
  doi       = {10.3390/app10207153},
  url       = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20201022-42744},
  pages     = {18},
  abstract  = {Although averting a seismic disturbance and its physical, social, and economic disruption is practically impossible, using the advancements in computational science and numerical modeling shall equip humanity to predict its severity, understand the outcomes, and equip for post-disaster management. Many buildings exist amidst the developed metropolitan areas, which are senile and still in service. These buildings were also designed before establishing national seismic codes or without the introduction of construction regulations. In that case, risk reduction is significant for developing alternatives and designing suitable models to enhance the existing structure's performance. Such models will be able to classify risks and casualties related to possible earthquakes through emergency preparation. Thus, it is crucial to recognize structures that are susceptible to earthquake vibrations and need to be prioritized for retrofitting. However, each building's behavior under seismic actions cannot be studied through performing structural analysis, as it might be unrealistic because of the rigorous computations, long period, and substantial expenditure. Therefore, it calls for a simple, reliable, and accurate process known as Rapid Visual Screening (RVS), which serves as a primary screening platform, including an optimum number of seismic parameters and predetermined performance damage conditions for structures. In this study, the damage classification technique was studied, and the efficacy of the Machine Learning (ML) method in damage prediction via a Support Vector Machine (SVM) model was explored. The ML model is trained and tested separately on damage data from four different earthquakes, namely Ecuador, Haiti, Nepal, and South Korea. Each dataset consists of varying numbers of input data and eight performance modifiers. Based on the study and the results, the ML model using SVM classifies the given input data into the belonging classes and accomplishes the performance on hazard safety evaluation of buildings.},
  subject      = {Erdbeben},
  language  = {en}
}
@phdthesis{Kavrakov,
  author    = {Kavrakov, Igor},
  title     = {Synergistic Framework for Analysis and Model Assessment in Bridge Aerodynamics and Aeroelasticity},
  publisher = {Bauhaus-Universit{\"a}tsverlag},
  address   = {Weimar},
  isbn      = {978-3-95773-284-2},
  doi       = {10.25643/bauhaus-universitaet.4109},
  url       = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20200316-41099},
  school      = {Bauhaus-Universit{\"a}t Weimar},
  pages     = {314},
  abstract  = {Wind-induced vibrations often represent a major design criterion for long-span bridges. This work deals with the assessment and development of models for aerodynamic and aeroelastic analyses of long-span bridges. Computational Fluid Dynamics (CFD) and semi-analytical aerodynamic models are employed to compute the bridge response due to both turbulent and laminar free-stream. For the assessment of these models, a comparative methodology is developed that consists of two steps, a qualitative and a quantitative one. The first, qualitative, step involves an extension of an existing approach based on Category Theory and its application to the field of bridge aerodynamics. Initially, the approach is extended to consider model comparability and completeness. Then, the complexity of the CFD and twelve semi-analytical models are evaluated based on their mathematical constructions, yielding a diagrammatic representation of model quality. In the second, quantitative, step of the comparative methodology, the discrepancy of a system response quantity for time-dependent aerodynamic models is quantified using comparison metrics for time-histories. Nine metrics are established on a uniform basis to quantify the discrepancies in local and global signal features that are of interest in bridge aerodynamics. These signal features involve quantities such as phase, time-varying frequency and magnitude content, probability density, non-stationarity, and nonlinearity. The two-dimensional (2D) Vortex Particle Method is used for the discretization of the Navier-Stokes equations including a Pseudo-three dimensional (Pseudo-3D) extension within an existing CFD solver. The Pseudo-3D Vortex Method considers the 3D structural behavior for aeroelastic analyses by positioning 2D fluid strips along a line-like structure. A novel turbulent Pseudo-3D Vortex Method is developed by combining the laminar Pseudo-3D VPM and a previously developed 2D method for the generation of free-stream turbulence. Using analytical derivations, it is shown that the fluid velocity correlation is maintained between the CFD strips. Furthermore, a new method is presented for the determination of the complex aerodynamic admittance under deterministic sinusoidal gusts using the Vortex Particle Method. The sinusoidal gusts are simulated by modeling the wakes of flapping airfoils in the CFD domain with inflow vortex particles. Positioning a section downstream yields sinusoidal forces that are used for determining all six components of the complex aerodynamic admittance. A closed-form analytical relation is derived, based on an existing analytical model. With this relation, the inflow particles' strength can be related with the target gust amplitudes a priori. The developed methodologies are combined in a synergistic framework, which is applied to both fundamental examples and practical case studies. Where possible, the results are verified and validated. The outcome of this work is intended to shed some light on the complex wind-bridge interaction and suggest appropriate modeling strategies for an enhanced design.},
  subject      = {Br{\"u}cke},
  language  = {en}
}
@misc{Rauch2008,
  type      = {Master Thesis},
  author    = {Rauch, Kristin},
  title     = {Simulation - Termincontrolling beim Bau einer Br{\"u}ckenkappe},
  doi       = {10.25643/bauhaus-universitaet.1362},
  url       = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20081111-14414},
  school      = {Bauhaus-Universit{\"a}t Weimar},
  year      = {2008},
  abstract  = {Die Simulation ist vor allem in der Forschung und Wissenschaft ein bekanntes Ver-fahren zur Untersuchung von dynamischen Prozessen. Fachgebiete wie u.a. die Medizin und Biologie, das Verkehrswesen, die Automobilindustrie, die Meteorologie und die Fertigungstechnik gewinnen neue Erkenntnisse aus dem Einsatz derartiger Analyseverfahren. Gr{\"u}nde f{\"u}r die Anwendung von Computersimulationen erstrecken sich von finanziellen und zeitlichen Aspekten {\"u}ber eine Risikoverringerung bis hin zu einer vereinfachten Vorgehensweise. Nicht in allen Bereichen aber werden die viel-seitigen Vorteile von Simulationsmethoden genutzt. In der Baubranche wird Simulation derzeit nur ansatzweise eingesetzt. Doch vor al-lem Baustellen bieten durch den zunehmenden Kosten- und Termindruck sowie viel-seitige andere Einfl{\"u}sse eine gute Basis f{\"u}r die Anwendung von Simulationsmetho-den. Der Bauablauf kann dadurch besser kontrolliert und gesteuert werden. In der Planungsphase von Bauprojekten wird Simulation bereits in Grundz{\"u}gen f{\"u}r die Op-timierung von Bauablauf- und Logistikprozessen genutzt. Allerdings ist besonders die Ausf{\"u}hrungsphase durch St{\"o}rungen und {\"A}nderungen gepr{\"a}gt, sodass hier Simu-lationsmethoden noch effektiver eingesetzt werden k{\"o}nnen. Im Rahmen dieser Arbeit sollen die Einsatzm{\"o}glichkeiten von Simulationsmethoden f{\"u}r die Optimierung des Termincontrollings untersucht werden. Durch das Aufzeigen verschiedener Methoden sowie einem Vergleich {\"u}ber ihre Vor- und Nachteile wird herausgefiltert, welches Simulationswerkzeug am effektivsten im Termincontrolling eingesetzt werden kann. Ein weiteres Ziel dieser Arbeit ist die Modellierung eines Beispielprozesses anhand eines ausgew{\"a}hlten Simulationsverfahrens. Die Herstellung einer Br{\"u}ckenkappe wird in diesem Zusammenhang umfangreich dargestellt und analysiert. Eventuelle Zwangspunkte bei der Umsetzung und verschiedene L{\"o}sungsm{\"o}glichkeiten werden aufgezeigt.},
  subject      = {Simulation},
  language  = {de}
}
@article{HarirchianJadhavMohammadetal.,
  author    = {Harirchian, Ehsan and Jadhav, Kirti and Mohammad, Kifaytullah and Aghakouchaki Hosseini, Seyed Ehsan and Lahmer, Tom},
  title     = {A Comparative Study of MCDM Methods Integrated with Rapid Visual Seismic Vulnerability Assessment of Existing RC Structures},
  series = {Applied Sciences},
  volume    = {2020},
  journal   = {Applied Sciences},
  number    = {Volume 10, issue 18, article 6411},
  publisher = {MDPI},
  address   = {Basel},
  doi       = {10.3390/app10186411},
  url       = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20200918-42360},
  pages     = {24},
  abstract  = {Recently, the demand for residence and usage of urban infrastructure has been increased, thereby resulting in the elevation of risk levels of human lives over natural calamities. The occupancy demand has rapidly increased the construction rate, whereas the inadequate design of structures prone to more vulnerability. Buildings constructed before the development of seismic codes have an additional susceptibility to earthquake vibrations. The structural collapse causes an economic loss as well as setbacks for human lives. An application of different theoretical methods to analyze the structural behavior is expensive and time-consuming. Therefore, introducing a rapid vulnerability assessment method to check structural performances is necessary for future developments. The process, as mentioned earlier, is known as Rapid Visual Screening (RVS). This technique has been generated to identify, inventory, and screen structures that are potentially hazardous. Sometimes, poor construction quality does not provide some of the required parameters; in this case, the RVS process turns into a tedious scenario. Hence, to tackle such a situation, multiple-criteria decision-making (MCDM) methods for the seismic vulnerability assessment opens a new gateway. The different parameters required by RVS can be taken in MCDM. MCDM evaluates multiple conflicting criteria in decision making in several fields. This paper has aimed to bridge the gap between RVS and MCDM. Furthermore, to define the correlation between these techniques, implementation of the methodologies from Indian, Turkish, and Federal Emergency Management Agency (FEMA) codes has been done. The effects of seismic vulnerability of structures have been observed and compared.},
  subject      = {Erdbebensicherheit},
  language  = {en}
}
@phdthesis{Oucif,
  author    = {Oucif, Chahmi},
  title     = {Analytical Modeling of Self-Healing and Super Healing in Cementitious Materials},
  doi       = {10.25643/bauhaus-universitaet.4229},
  url       = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20200831-42296},
  school      = {Bauhaus-Universit{\"a}t Weimar},
  pages     = {208},
  abstract  = {Self-healing materials have recently become more popular due to their capability to autonomously and autogenously repair the damage in cementitious materials. The concept of self-healing gives the damaged material the ability to recover its stiffness. This gives a difference in comparing with a material that is not subjected to healing. Once this material is damaged, it cannot sustain loading due to the stiffness degradation. Numerical modeling of self-healing materials is still in its infancy. Multiple experimental researches were conducted in literature to describe the behavior of self-healing of cementitious materials. However, few numerical investigations were undertaken. The thesis presents an analytical framework of self-healing and super healing materials based on continuum damage-healing mechanics. Through this framework, we aim to describe the recovery and strengthening of material stiffness and strength. A simple damage healing law is proposed and applied on concrete material. The proposed damage-healing law is based on a new time-dependent healing variable. The damage-healing model is applied on isotropic concrete material at the macroscale under tensile load. Both autonomous and autogenous self-healing mechanisms are simulated under different loading conditions. These two mechanisms are denoted in the present work by coupled and uncoupled self-healing mechanisms, respectively. We assume in the coupled self-healing that the healing occurs at the same time with damage evolution, while we assume in the uncoupled self-healing that the healing occurs when the material is deformed and subjected to a rest period (damage is constant). In order to describe both coupled and uncoupled healing mechanisms, a one-dimensional element is subjected to different types of loading history. In the same context, derivation of nonlinear self-healing theory is given, and comparison of linear and nonlinear damage-healing models is carried out using both coupled and uncoupled self-healing mechanisms. The nonlinear healing theory includes generalized nonlinear and quadratic healing models. The healing efficiency is studied by varying the values of the healing rest period and the parameter describing the material characteristics. In addition, theoretical formulation of different self-healing variables is presented for both isotropic and anisotropic maerials. The healing variables are defined based on the recovery in elastic modulus, shear modulus, Poisson's ratio, and bulk modulus. The evolution of the healing variable calculated based on cross-section as function of the healing variable calculated based on elastic stiffness is presented in both hypotheses of elastic strain equivalence and elastic energy equivalence. The components of the fourth-rank healing tensor are also obtained in the case of isotropic elasticity, plane stress and plane strain. Recent research revealed that self-healing presents a crucial solution also for the strengthening of the materials. This new concept has been termed ``Super Healing``. Once the stiffness of the material is recovered, further healing can result as a strengthening material. In the present thesis, new theory of super healing materials is defined in isotropic and anisotropic cases using sound mathematical and mechanical principles which are applied in linear and nonlinear super healing theories. Additionally, the link of the proposed theory with the theory of undamageable materials is outlined. In order to describe the super healing efficiency in linear and nonlinear theories, the ratio of effective stress to nominal stress is calculated as function of the super healing variable. In addition, the hypotheses of elastic strain and elastic energy equivalence are applied. In the same context, new super healing matrix in plane strain is proposed based on continuum damage-healing mechanics. In the present work, we also focus on numerical modeling of impact behavior of reinforced concrete slabs using the commercial finite element package Abaqus/Explicit. Plain and reinforced concrete slabs of unconfined compressive strength 41 MPa are simulated under impact of ogive-nosed hard projectile. The constitutive material modeling of the concrete and steel reinforcement bars is performed using the Johnson-Holmquist-2 damage and the Johnson-Cook plasticity material models, respectively. Damage diameters and residual velocities obtained by the numerical model are compared with the experimental results and effect of steel reinforcement and projectile diameter is studied.},
  subject      = {Schaden},
  language  = {en}
}