@inproceedings{SchwendnerVoellmeckeHoetal., author = {Schwendner, Sascha and V{\"o}llmecke, Lars and Ho, Ai Phien and Fischer, Jens and Seim, Werner}, title = {TESTING OF CONNECTIONS TAKEN FROM OLD NAILED ROOF TRUSSES}, doi = {10.25643/bauhaus-universitaet.6362}, pages = {8}, abstract = {Experimental testing of nailed connections taken from old roof trusses is presented in this paper. To enable the further use and preservation of nailed roof trusses, it is important to understand how the nail corrosion and aging processes of steel and wood affect the load-bearing capacity and deformation behaviour of such structures. The hypothesis was investigated whether corroded nails allow an increase in load-bearing capacity. Several old and new joints were tested in a first test series, and the results were very promising regarding the initial assumption. However, more tests must be carried out to verify the results.}, subject = {Holzbau}, language = {en} } @inproceedings{VoellmeckeSchwendnerHoetal., author = {V{\"o}llmecke, Lars and Schwendner, Sascha and Ho, Ai Phien and Fischer, Jens and Seim, Werner}, title = {Assessment of nailed connections in existing structures}, doi = {10.25643/bauhaus-universitaet.6361}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20230609-63615}, pages = {7}, abstract = {This paper presents the development of an assessment scheme for a visual qualitative evaluation of nailed connections in existing structures, such as board trusses. In terms of further use and preservation, a quick visual inspection will help to evaluate the quality of a structure regarding its load-bearing capacity and deformation behaviour. Tests of old and new nailed joints in combination with a rating scheme point out the correlation between the load-bearing capacity and condition of a joint. Old joints of comparatively good condition tend to exhibit better results than those of poor condition. Moreover, aged joints are generally more load-bearing than newly assembled ones.}, subject = {Holzbau}, language = {en} } @inproceedings{BaronMandavereCheruiyot, author = {Baron, Nicole and Mandavere, Melody and Cheruiyot, Roselyne}, title = {SE/ NPO Ecosystems and urban Governance in Johannesburg}, series = {ISTR, Fifteenth International Conference, Montreal, Canada}, booktitle = {ISTR, Fifteenth International Conference, Montreal, Canada}, doi = {10.25643/bauhaus-universitaet.6364}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20230517-63643}, pages = {47}, abstract = {This paper presents initial findings from the empirical analysis of community based social enterprise (SE) and non-profit organisation (NPO) ecosystems in Johannesburg. SEs and NPOs are widely recognised as contributors to the resilience of marginalised urban communities. However, the connection between these organisations , urban governance, and community resilience has not yet been sufficiently understood , particularly in African urban contexts. The 'Resilient Urban Communities' project focuses on Johannesburg as a case study to shed light on this under-researched topic. The key to exploring it is understanding SEs and NPOs as providers of public services, job creators, and promoters of good governance, all of which contribute to community resilience. Using this premise as a starting point, this paper investigates ecosystem conditions with a particular focus on state-civil society partnerships. Empirical data was generated through semi-struc-tured interviews and analysed with a grounded theory approach. Preliminary results of this ongoing research reveal that urban geography is a relevant ecosystem factor for SEs and NPOs from marginalised communities. We also suggest that co-production could be an opportunity for growth within the investigated state-civil society partnership.}, subject = {S{\"u}dafrika}, language = {en} } @inproceedings{Dokhanchi, author = {Dokhanchi, Najmeh Sadat}, title = {Acoustic travel time tomography: Applicability of an array of directional sound sources}, editor = {Arnold, J{\"o}rg}, doi = {10.25643/bauhaus-universitaet.4658}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20220622-46589}, abstract = {The technique of Acoustic travel-time TOMography (ATOM) allows for measuring the distribution of air temperatures throughout the entire room based on the determined sound-travel-times of early reflections, currently up to second order reflections. The number of detected early reflections in the room impulse response (RIR) which stands for the desired sound paths inside the room, has a significant impact on the resolution of reconstructed temperatures. This study investigates the possibility of utilizing an array of directional sound sources for ATOM measurements instead of a single omnidirectional loudspeaker used in the previous studies [1-3]. The developed measurement setup consists of two directional sound sources placed near the edge of the floor in the climate chamber of the Bauhaus-University Weimar and one omnidirectional receiver at center of the room near the ceiling. In order to compensate for the reduced number of sound paths when using directional sound sources, it is proposed to take high-energy early reflections up to third order into account. For this purpose, the simulated travel times up to third-order image sources were implemented in the image source model (ISM) algorithm, by which these early reflections can be detected effectively for air temperature reconstructions. To minimize the uncertainties of travel-times estimation due to the positioning of the sound transducers inside the room, measurements were conducted to determine the exact emitting point of the utilized sound source i.e. its acoustic center (AC). For these measurements, three types of excitation signals (MLS, linear and logarithmic chirp signals) with various frequency ranges were used considering that the acoustic center of a sound source is a frequency dependent parameter [4]. Furthermore, measurements were conducted to determine an optimum excitation signal based on the given condition of the ATOM measurement set-up which defines an optimum method for the RIR estimation correspondingly. Finally, the uncertainty of the measuring system utilizing an array of directional sound sources was analyzed.}, subject = {Bauphysik}, language = {en} } @inproceedings{KieselEngelsVoelker, author = {Kiesel, Gerd and Engels, Merit and V{\"o}lker, Conrad}, title = {Energetische Transformation im l{\"a}ndlichen Raum - Aufbau eines prozessorientierten Entwicklungs- und Moderationsmodells}, series = {Schriftenreihe des Fachgebiets Bauphysik/Energetische Geb{\"a}udeoptimierung}, booktitle = {Schriftenreihe des Fachgebiets Bauphysik/Energetische Geb{\"a}udeoptimierung}, editor = {Kornadt, Oliver and Carrigan, Svenja and Hofmann, Markus and V{\"o}lker, Conrad}, publisher = {Eigenverlag Technische Universit{\"a}t Kaiserslautern}, address = {Kaiserslautern}, isbn = {978-3-95974-176-7}, issn = {2363-8206}, doi = {10.25643/bauhaus-universitaet.4656}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20220617-46566}, pages = {3}, abstract = {Kleine Kommunen im l{\"a}ndlichen Raum sind aufgrund ihrer oft eingeschr{\"a}nkten personellen und finanziellen Kapazit{\"a}ten bisher eher sporadisch in den Themenfeldern Energieeffizienz und Erneuerbare Energien aktiv. Immer wieder stellt sich daher Frage, wie die Klimaschutzstrategien des Bundes und der L{\"a}nder dort mit dem verf{\"u}gbaren Personal kosteng{\"u}nstig realisierbar sind. Vor diesem Hintergrund wird ein Werkzeug entwickelt, mit dessen Hilfe der aktive Einstieg in diese Thematik mit geringen Aufwand und {\"u}berwiegend barrierefrei m{\"o}glich ist. Der Aufbau eines prozessorientierten Entwicklungs- und Moderationsmodells zur Erprobung und Umsetzung bezahlbarer Handlungsoptionen f{\"u}r Energieeinsparungen und effizienten Energieeinsatz im {\"u}berwiegend l{\"a}ndlichen gepr{\"a}gten Raum ist der Schwerpunkt der Softwarel{\"o}sung. Kommunen werden mit deren Hilfe in die Lage versetzt, in die notwendigen Prozesse der Energie- und W{\"a}rmewende einzusteigen. Dabei soll der modulare Aufbau die regul{\"a}ren Schritte notwendiger (integrierter) Planungsprozesse nicht vollst{\"a}ndig ersetzen. Vielmehr k{\"o}nnen innerhalb der Online-Anwendung - {\"u}berwiegend automatisiert - konkrete Maßnahmenvorschl{\"a}ge erstellt werden, die ein solides Fundament der k{\"u}nftigen energetischen Entwicklung der Kommunen darstellen. F{\"u}r eine gezielte Validierung der Ergebnisse und der Ableitung potentieller Maßnahmen werden f{\"u}r die Erprobung Modellkommunen in Th{\"u}ringen, Bayern und Hessen als Reallabore einbezogen. Das Tool steht bisher zun{\"a}chst nur den beteiligten Modellkommunen zur Verf{\"u}gung. Die entwickelte Softwarel{\"o}sung soll k{\"u}nftig Schritt f{\"u}r Schritt allen interessierten Kommunen mit diversen Hilfsmitteln und einer Vielzahl anderer praktischer Bestandteile zur Verf{\"u}gung gestellt werden.}, subject = {Modellierung}, language = {de} } @inproceedings{HartmannAlsaadVoelker, author = {Hartmann, Maria and Alsaad, Hayder and V{\"o}lker, Conrad}, title = {Das Potential von Fassadenbegr{\"u}nungen zur Verringerung des W{\"a}rmeinseleffekts: Simulation eines Beispielquartiers}, series = {Bauphysiktage Kaiserslautern 2022}, booktitle = {Bauphysiktage Kaiserslautern 2022}, address = {Kaiserslautern}, isbn = {978-3-95974-176-7}, issn = {2363-8206}, doi = {10.25643/bauhaus-universitaet.4667}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20220713-46676}, pages = {147-149}, abstract = {Die Auswirkungen einer Fassadenbegr{\"u}nung auf den W{\"a}rmeinseleffekt in Stuttgart wurde f{\"u}r eine Hitzeperiode numerisch simuliert und bewertet. Die Ergebnisse zeigten positive Auswirkungen innerhalb des Simulationsgebiets sowie eine geringe Fernwirkung auf benachbarte Stadtquartiere. Diese {\"A}nderungen k{\"o}nnen zur Verbesserung des thermischen Komforts im Außenraum beitragen. Eine reduzierte Temperatur der Außenoberfl{\"a}che f{\"u}hrt dar{\"u}ber hinaus auch zu einer geringeren Oberfl{\"a}chentemperatur der Wandinnenseite, welche die Innenraumtemperatur beeinflusst. Folglich kann die thermische Behaglichkeit auch im Innenraum erh{\"o}ht werden.}, subject = {Mikroklima}, language = {de} } @inproceedings{GeskeBenzVoelker, author = {Geske, Mara and Benz, Alexander and V{\"o}lker, Conrad}, title = {Anwendung georeferenzierter Bilddaten bei energetischen Quartiersanalysen}, series = {Tagungsband Bauphysiktage Kaiserslautern 2022}, booktitle = {Tagungsband Bauphysiktage Kaiserslautern 2022}, editor = {Kornadt, Oliver and Carrigan, Svenja and Hofmann, Markus and V{\"o}lker, Conrad}, publisher = {Eigenverlag der Technischen Universit{\"a}t Kaiserslautern}, address = {Kaiserslautern}, isbn = {987-3-95974-176-7}, issn = {2363-8206}, doi = {10.25643/bauhaus-universitaet.4654}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20220617-46544}, pages = {127-129}, abstract = {Bei Analysen des Geb{\"a}udebestands im Quartierskontext werden zu Dokumentationszwecken viele Bilddaten erzeugt. Diese Daten sind im Nachhinein h{\"a}ufig keinen eindeutig genauen Standorten und Blickwinkeln auf das Bauwerk zuzuordnen. Insbesondere gilt dies f{\"u}r Ortsunkundige oder f{\"u}r Detailaufnahmen. Eine zus{\"a}tzliche Herausforderung stellt die Aufnahme von W{\"a}rmebr{\"u}cken- oder andersartigen Geb{\"a}udedetails durch Thermogramme dar. In der Praxis kommen hier oftmals analoge, fehleranf{\"a}llige L{\"o}sungen zum Einsatz. Durch die Nutzung von Georeferenzierung kann diese L{\"u}cke geschlossen und eine eindeutige Kommunikation und Auswertung gew{\"a}hrleistet werden. Im Gegensatz zu den {\"u}blichen Kameras sind Smartphones nach Stand der Technik ausreichend ausgestattet, um neben Daten zu Standort auch die Orientierungswinkel einer Bildaufnahme zu dokumentieren. Die georefenzierten Bilder k{\"o}nnen auf Grundlage der in den sogenannten Exif-Daten mitgeschriebenen Informationen h{\"a}ndisch in ein bestehendes Quartiersmodell integriert werden. Anhand eines universit{\"a}ren Musterquartiers wird die nutzerfreundliche Realisierung beispielhaft erprobt und auf ihre Potentiale zur Automatisierung in Python untersucht. Hierf{\"u}r wurde ein bestehendes Quartiersmodell als geometrische Grundlage genutzt und um RGB-Bilder sowie Thermogramme erweitert. Das beschriebene Vorgehen wird im Rahmen der Anwendung auf seinen m{\"o}glichen Einsatz im Rahmen einer energetischen Quartierserfassung sowie einer Bauschadensdokumentation untersucht. Mit dem vorliegenden Beitrag wird dem Nutzenden ein Werkzeug bereitgestellt, das die hochwertige Dokumentation einer Bestandserfassung, auch im Quartierskontext, erm{\"o}glicht.}, subject = {Quartiersanalyse}, language = {de} } @inproceedings{AlsaadVoelker, author = {Alsaad, Hayder and V{\"o}lker, Conrad}, title = {Measuring and visualizing the flow supplied by personalized ventilation}, series = {Proceedings Book Roomvent 2020}, booktitle = {Proceedings Book Roomvent 2020}, address = {Turin, Italy}, doi = {10.25643/bauhaus-universitaet.4657}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20220622-46573}, abstract = {This study investigates the flow supplied by personalized ventilation (PV) by means of anemometer measurements and schlieren visualization. The study was conducted using a thermal manikin to simulate a seated occupant facing a PV outlet. Air velocity was measured at multiple points in the flow field; the collected velocity values were used to calculate the turbulence intensity. Results indicated that PV was supplying air with low turbulence intensity that was able to penetrate the convective boundary layer of the manikin to supply clean air for inhalation. The convective boundary layer, however, obstructed the supplied flow and reduced its velocity by a total of 0.26 m/s. The PV flow preserved its value until about 10 cm from the face where velocity started to drop. Further investigations were conducted to test a PV diffuser with a relatively large outlet diameter (18 cm). This diffuser was developed using 3d-modelling and 3d-printing. The diffuser successfully distributed the flow over the larger outlet area. However, the supplied velocity and turbulence fields were not uniform across the section.}, subject = {Bel{\"u}ftung}, language = {en} } @inproceedings{Dokhanchi, author = {Dokhanchi, Najmeh Sadat}, title = {Reconstruction of the indoor air temperature distribution using acoustic travel-time tomography}, editor = {Arnold, J{\"o}rg}, doi = {10.25643/bauhaus-universitaet.4659}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20220622-46593}, abstract = {Acoustic travel-time tomography (ATOM) is being increasingly considered recently as a remote sensing methodology to determine the indoor air temperatures distribution. It employs the relationship between the sound velocities along sound-paths and their related travel-times through measured room-impulse-response (RIR). Thus, the precise travel-time estimation is of critical importance which can be performed by applying an analysis time-window method. In this study, multiple analysis time-windows with different lengths are proposed to overcome the challenge of accurate detection of the travel-times at RIR. Hence, the ATOM-temperatures distribution has been measured at the climate chamber lab of the Bauhaus-University Weimar. As a benchmark, the temperatures of NTC thermistors are compared to the reconstructed temperatures derived from the ATOM technique illustrating this technique can be a reliable substitute for traditional thermal sensors. The numerical results indicate that the selection of an appropriate analysis time-window significantly enhances the accuracy of the reconstructed temperatures distribution.}, subject = {Bauphysik}, language = {en} } @inproceedings{KleinerRoessler, author = {Kleiner, Florian and R{\"o}ßler, Christiane}, title = {Utilizing Modern FIB/SEM Technology and EDS for 3D Imaging of Hydrated Alite and its Pore Space}, series = {ERICA-CASH II Final Converence}, booktitle = {ERICA-CASH II Final Converence}, doi = {10.25643/bauhaus-universitaet.4455}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20210702-44555}, pages = {2}, abstract = {The exploration of cementitious materials using scanning electron microscopes (SEM) is mainly done using fractured or polished surfaces. This leads to high-resolution 2D-images that can be combined using EDX and EBSD to unveil details of the microstructure and composition of materials. Nevertheless, this does not provide a quantitative insight into the three-dimensional fine structure of for example C-S-H phases. The focused ion beam (FIB) technology can cut a block of material in thin layers of less than 10 nm. This gives us a volume of 1000 μm³ with a voxel resolution of down to 4 x 4 x 10 nm³. The results can be combined with simultaneously acquired EDX data to improve image segmentation. Results of the investigation demonstrate that it is possible to obtain close-to-native 3D-visualisation of the spatial distribution of unreacted C3S, C-S-H and CH. Additionally, an optimized preparation method allows us to quantify the fine structure of C-S-H phases (length, aspect ratio, …) and the pore space.}, subject = {Rasterelektronenmikroskop}, language = {en} } @inproceedings{PaulRodehorst, author = {Paul, Debus and Rodehorst, Volker}, title = {Multi-Scale Flight Path Planning for UAS Building Inspection}, series = {Proceedings of the 18th International Conference on Computing in Civil and Building Engineering}, volume = {2020}, booktitle = {Proceedings of the 18th International Conference on Computing in Civil and Building Engineering}, editor = {Santos, Toledo}, publisher = {Springer}, doi = {10.25643/bauhaus-universitaet.4205}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20201009-42053}, pages = {19}, abstract = {Unmanned aircraft systems (UAS) show large potential for the construction industry. Their use in condition assessment has increased significantly, due to technological and computational progress. UAS play a crucial role in developing a digital maintenance strategy for infrastructure, saving cost and effort, while increasing safety and reliability. Part of that strategy are automated visual UAS inspections of the building's condition. The resulting images can automatically be analyzed to identify and localize damages to the structure that have to be monitored. Further interest in parts of a structure can arise from events like accidents or collisions. Areas of low interest exist, where low resolution monitoring is sufficient. From different requirements for resolution, different levels of detail can be derived. They require special image acquisition parameters that differ mainly in the distance between camera and structure. Areas with a higher level of detail require a smaller distance to the object, producing more images. This work proposes a multi-scale flight path planning procedure, enabling higher resolution requirements for areas of special interest, while reducing the number of required images to a minimum. Careful selection of the camera positions maintains the complete coverage of the structure, while achieving the required resolution in all areas. The result is an efficient UAS inspection, reducing effort for the maintenance of infrastructure.}, subject = {Drohne}, language = {en} } @inproceedings{RinsdorfBuschow, author = {Rinsdorf, Lars and Buschow, Christopher}, title = {Validit{\"a}t durch Agilit{\"a}t: Methodische Implikationen einerpraxistheoretisch fundierten Medieninnovationsforschung}, series = {Innovation in der Medienproduktion und -distribution - Proceedings der Jahrestagung der Fachgruppe Medien{\"o}konomie der DGPUK 2019, K{\"o}ln}, booktitle = {Innovation in der Medienproduktion und -distribution - Proceedings der Jahrestagung der Fachgruppe Medien{\"o}konomie der DGPUK 2019, K{\"o}ln}, editor = {Wellbrock, Christian and Zabel, Christian}, publisher = {SSOAR - Social Science Open Access Repository}, address = {Stuttgart}, organization = {Deutsche Gesellschaft f{\"u}r Publizistik- und Kommunikationswissenschaft e.V.}, doi = {10.25643/bauhaus-universitaet.4187}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20200630-41874}, pages = {15}, abstract = {Das Innovationsmanagement von Medienorganisationen unterliegt derzeit erheblichen Ver{\"a}nderungen: Im ver{\"a}nderten Marktumfeld erweisen sich Flexibilit{\"a}t, schnelle Richtungswechsel und Anpassungsf{\"a}higkeit als zentral. Darauf muss auch die Medienmanagement-Forschung reagieren: Um die Agilit{\"a}t der gegenw{\"a}rtigen Unternehmenspraxis valide zu erforschen, ist eine ebenso agile, adaptive Forschung gefordert. Zu diesem Zweck schl{\"a}gt der Beitrag eine praxistheoretische Perspektive auf das Innovationsmanagement von Medienorganisationen vor. Empirische Forschungsdesigns, die aus einem solchen Zugriff resultieren, werden sowohl hinsichtlich ihrer methodischen Herausforderungen als auch ihres Forschungsprojektmanagements diskutiert. Der Beitrag greift außerdem neue M{\"o}glichkeitsr{\"a}ume des wissenschaftlichen Publizierens, des Universit{\"a}tsmanagements sowie der Forschungsorganisation auf, die praxistheoretisch gegr{\"u}ndete, empirische Innovationsforschung in der Medienwirtschaft einfordert.}, subject = {Medien{\"o}konomie}, language = {de} } @inproceedings{DokhanchiArnoldVogeletal., author = {Dokhanchi, Najmeh Sadat and Arnold, J{\"o}rg and Vogel, Albert and V{\"o}lker, Conrad}, title = {Acoustic Travel-Time Tomography: Optimal Positioning of Transceiver and Maximal Sound-Ray Coverage of the Room}, series = {Fortschritte der Akustik - DAGA 2019}, booktitle = {Fortschritte der Akustik - DAGA 2019}, doi = {10.25643/bauhaus-universitaet.3877}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20190408-38778}, pages = {4}, abstract = {Acoustic travel-time tomography (ATOM) determines the distribution of the temperature in a propagation medium by measuring the travel-time of acoustic signals between transmitters and receivers. To employ ATOM for indoor climate measurements, the impulse responses have been measured in the climate chamber lab of the Bauhaus-University Weimar and compared with the theoretical results of its image source model (ISM). A challenging task is distinguishing the reflections of interest in the reflectogram when the sound rays have similar travel-times. This paper presents a numerical method to address this problem by finding optimal positions of transmitter and receiver, since they have a direct impact on the distribution of travel times. These optimal positions have the minimum number of simultaneous arrival time within a threshold level. Moreover, for the tomographic reconstruction, when some of the voxels remain empty of sound-rays, it leads to inaccurate determination of the air temperature within those voxels. Based on the presented numerical method, the number of empty tomographic voxels are minimized to ensure the best sound-ray coverage of the room. Subsequently, a spatial temperature distribution is estimated by simultaneous iterative reconstruction technique (SIRT). The experimental set-up in the climate chamber verifies the simulation results.}, subject = {Bauphysik}, language = {en} } @inproceedings{OPUS4-4304, title = {Second urbanHIST Conference. Interpreting 20th Century European Urbanism}, editor = {Abarkan, Abdellah and Bihlmaier, Helene and Gimeno S{\´a}nchez, Andrea and Blaga, Andreea}, address = {Karlskrona}, organization = {urbanHIST}, doi = {10.25643/bauhaus-universitaet.4304}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20201218-43046}, pages = {135}, abstract = {urbanHIST (2019). Second urbanHIST Conference. Interpreting 20th Century European Urbanism. Stockholm, 21-23 October 2019 Conference Booklet}, subject = {St{\"a}dtebau}, language = {en} } @inproceedings{SchirmerKleinerOsburg, author = {Schirmer, Ulrike and Kleiner, Florian and Osburg, Andrea}, title = {Objektive Oberfl{\"a}chenbewertung von (P)SCC-Sichtbeton mittels automatisierter Analyse von Bilddaten}, series = {Tagung Bauchemie der GDCH-Fachgruppe Bauchemie, 30. September - 2. Oktober 2019 in Aachen}, booktitle = {Tagung Bauchemie der GDCH-Fachgruppe Bauchemie, 30. September - 2. Oktober 2019 in Aachen}, publisher = {Gesellschaft Deutscher Chemiker}, isbn = {978-3-947197-13-2}, doi = {10.25643/bauhaus-universitaet.4510}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20211004-45104}, pages = {8}, abstract = {Sichtbeton ist aufgrund seiner Vielf{\"a}ltigkeit in der Formgebung eines der am meisten verbreiteten Gestaltungsmittel der modernen Architektur und optimal f{\"u}r neue Bauweisen sowie steigende Anforderungen an das Erscheinungsbild {\"o}ffentlicher Bauwerke geeignet. Die Herstellung qualitativ hochwertiger Sichtbetonoberfl{\"a}chen h{\"a}ngt im hohen Maße von den Wechselwirkungen zwischen Beton und Trennmittel, zwischen Trennmittel und Schalmaterial, sowie von der Applikationsart und -menge des Trennmittels ab. In Laborversuchen wurden diese Einfl{\"u}sse auf die Sichtbetonoberfl{\"a}chen eines polymermodifizierten selbstverdichtenden Betons (PSCC) im Vergleich zu einem herk{\"o}mmlichen selbstverdichtenden Beton (SCC) untersucht. Im Rahmen dieser Arbeiten wurde eine Methode zur Beurteilung der Sichtbetonqualit{\"a}t entwickelt, mit welcher Ausschlusskriterien, wie maximale Porosit{\"a}t und Gleichm{\"a}ßigkeit, objektiv und automatisiert bestimmt werden k{\"o}nnen. Ver{\"a}nderungen dieser Werte durch Witterungseinfl{\"u}sse ließen zudem erste R{\"u}ckschl{\"u}sse auf die Dauerhaftigkeit der Sichtbetonoberfl{\"a}chen zu.}, subject = {Sichtbeton}, language = {de} } @inproceedings{VilceanuAbrahamczykMorgenthal, author = {V{\^i}lceanu, Victor and Abrahamczyk, Lars and Morgenthal, Guido}, title = {Nonlinear Analysis of Structures: Wind Induced Vibrations}, doi = {10.25643/bauhaus-universitaet.4033}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20191122-40337}, pages = {183}, abstract = {The proceedings at hand are the result of the International Master Course Module: "Nonlinear Analysis of Structures: Wind Induced Vibrations" held at the Faculty of Civil Engineering at Bauhaus-University Weimar, Germany in the summer semester 2019 (April - August). This material summarizes the results of the project work done throughout the semester, provides an overview of the topic, as well as impressions from the accompanying programme. Wind Engineering is a particular field of Civil Engineering that evaluates the resistance of structures caused by wind loads. Bridges, high-rise buildings, chimneys and telecommunication towers might be susceptible to wind vibrations due to their increased flexibility, therefore a special design is carried for this aspect. Advancement in technology and scientific studies permit us doing research at small scale for more accurate analyses. Therefore scaled models of real structures are built and tested for various construction scenarios. These models are placed in wind tunnels where experiments are conducted to determine parameters such as: critical wind speeds for bridge decks, static wind coefficients and forces for buildings or bridges. The objective of the course was to offer insight to the students into the assessment of long-span cable-supported bridges and high-rise buildings under wind excitation. The participating students worked in interdisciplinary teams to increase their knowledge in the understanding and influences on the behaviour of wind-sensitive structures.}, subject = {Ingenieurbau}, language = {en} } @inproceedings{AbrahamczykSchwarz, author = {Abrahamczyk, Lars and Schwarz, Jochen}, title = {Forecast Engineering: From Past Design to Future Decision 2017}, doi = {10.25643/bauhaus-universitaet.4034}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20191122-40344}, pages = {221}, abstract = {The design of engineering structures takes place today and in the past on the basis of static calculations. The consideration of uncertainties in the model quality becomes more and more important with the development of new construction methods and design requirements. In addition to the traditional forced-based approaches, experiences and observations about the deformation behavior of components and the overall structure under different exposure conditions allow the introduction of novel detection and evaluation criteria. The proceedings at hand are the result from the Bauhaus Summer School Course: Forecast Engineering held at the Bauhaus-Universit{\"a}t Weimar, 2017. It summarizes the results of the conducted project work, provides the abstracts of the contributions by the participants, as well as impressions from the accompanying programme and organized cultural activities. The special character of this course is in the combination of basic disciplines of structural engineering with applied research projects in the areas of steel and reinforced concrete structures, earthquake and wind engineering as well as informatics and linking them to mathematical methods and modern tools of visualization. Its innovative character results from the ambitious engineering tasks and advanced modeling demands.}, subject = {Proceedings}, language = {en} } @inproceedings{AbrahamczykSchwarz, author = {Abrahamczyk, Lars and Schwarz, Jochen}, title = {Forecast Engineering: From Past Design to Future Decision 2018}, doi = {10.25643/bauhaus-universitaet.4036}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20191126-40364}, pages = {112}, abstract = {Institute of Structural Engineering, Institute of Structural Mechanics, as well as Institute for Computing, Mathematics and Physics in Civil Engineering at the faculty of civil engineering at the Bauhaus-Universit{\"a}t Weimar presented special topics of structural engineering to highlight the broad spectrum of civil engineering in the field of modeling and simulation. The summer course sought to impart knowledge and to combine research with a practical context, through a challenging and demanding series of lectures, seminars and project work. Participating students were enabled to deal with advanced methods and its practical application. The extraordinary format of the interdisciplinary summer school offers the opportunity to study advanced developments of numerical methods and sophisticated modelling techniques in different disciplines of civil engineering for foreign and domestic students, which go far beyond traditional graduate courses. The proceedings at hand are the result from the Bauhaus Summer School course: Forecast Engineering held at the Bauhaus-Universit{\"a}t Weimar, 2018. It summarizes the results of the conducted project work, provides the abstracts/papers of the contributions by the participants, as well as impressions from the accompanying programme and organized cultural activities.}, subject = {Proceedings}, language = {en} } @inproceedings{OPUS4-3785, title = {30. Forum Bauinformatik}, editor = {Steiner, Maria and Theiler, Michael and Mirboland, Mahsa}, organization = {Bauhaus-Universit{\"a}t Weimar}, doi = {10.25643/bauhaus-universitaet}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20180917-37854}, pages = {424}, abstract = {Die Bauhaus-Universit{\"a}t Weimar ist seit langer Zeit mit dem Forum Bauinformatik eng verbunden. So wurde die Veranstaltung 1989 hier durch den Arbeitskreis Bauinformatik ins Leben gerufen und auch das 10. und 18. Forum Bauinformatik (1998 bzw. 2006) fand in Weimar statt. In diesem Jahr freuen wir uns daher besonders, das 30. Jubil{\"a}um an der Bauhaus-Universit{\"a}t Weimar ausrichten zu d{\"u}rfen und viele interessierte Wissenschaftler und Wissenschaftlerinnen aus dem Bereich der Bauinformatik in Weimar willkommen zu heißen. Das Forum Bauinformatik hat sich l{\"a}ngst zu einem festen Bestandteil der Bauinformatik im deutschsprachigen Raum entwickelt. Dabei steht es traditionsgem{\"a}ß unter dem Motto „von jungen Forschenden f{\"u}r junge Forschende", wodurch insbesondere Nachwuchswissenschaftlerinnen und ‑wissenschaftlern die M{\"o}glichkeit geboten wird, ihre Forschungsarbeiten zu pr{\"a}sentieren, Problemstellungen fachspezifisch zu diskutieren und sich {\"u}ber den neuesten Stand der Forschung zu informieren. Zudem wird eine ausgezeichnete Gelegenheit geboten, in die wissenschaftliche Gemeinschaft im Bereich der Bauinformatik einzusteigen und Kontakte mit anderen Forschenden zu kn{\"u}pfen. In diesem Jahr erhielten wir 49 interessante und qualitativ hochwertige Beitr{\"a}ge vor allem in den Themenbereichen Simulation, Modellierung, Informationsverwaltung, Geoinformatik, Structural Health Monitoring, Visualisierung, Verkehrssimulation und Optimierung. Daf{\"u}r m{\"o}chten wir uns ganz besonders bei allen Autoren, Co-Autoren und Reviewern bedanken, die durch ihr Engagement das diesj{\"a}hrige Forum Bauinformatik erst m{\"o}glich gemacht haben. Wir danken zudem Professor Große und Professor D{\´i}az f{\"u}r die Unterst{\"u}tzung bei der Auswahl der Beitr{\"a}ge f{\"u}r die Best Paper Awards. Ein herzliches Dankesch{\"o}n geht an die Kollegen an der Professur Informatik im Bauwesen der Bauhaus-Universit{\"a}t Weimar f{\"u}r die organisatorische, technische und beratende Unterst{\"u}tzung w{\"a}hrend der Planung der Veranstaltung.}, subject = {Bauinformatik}, language = {de} } @inproceedings{SirtlKraus, author = {Sirtl, Christin and Kraus, Matthias}, title = {Bonding Quality of Joined Glass Components Exposed to UV and Fluidic Influences}, publisher = {Ernst \& Sohn Verlag f{\"u}r Architektur und technische Wissenschaften GmbH \& Co. KG}, address = {Berlin}, isbn = {978-3-433-03269-5}, doi = {10.25643/bauhaus-universitaet.3914}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20190514-39144}, pages = {10}, abstract = {Components of structural glazing have to meet different requirements and resist various impacts, depending on the field of application. Within an international research project of the EU innovation program Horizon 2020, special glass panes with a fluid circulating in capillaries are developed exploiting solar energy. Major influences to this glazing are UV irradiation and the fluidic contact, effecting the mechanical and optical durability of the bonding material within the glass setup. Regarding to visual requirements, acrylate adhesives and EVA films are analyzed as possible bonding materials by destructive and non-destructive testing methods. Two types of specimen are presented for obtaining the mechanical behavior and the surface appearances of the bonding material.}, subject = {Alterung}, language = {en} }