@misc{Gollos,
  type      = {Master Thesis},
  author    = {Gollos, Carolin},
  title     = {Optimierung der Baustellenlogistik f{\"u}r die Ausbauphase eines Großprojektes},
  doi       = {10.25643/bauhaus-universitaet.2285},
  url       = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20140901-22858},
  school      = {Bauhaus-Universit{\"a}t Weimar},
  pages     = {98},
  abstract  = {Baulogistische Vorg{\"a}nge sind in einer modern angelegten Baustelle der Schl{\"u}ssel zu einer wirtschaftlichen Abwicklung. Dieses gilt nicht nur f{\"u}r den Rohbau, bei dem die sehr enge Verzahnung zwischen den Fertigungs- und Logistikprozessen auf der Baustelle zu beobachten ist, sondern noch mehr f{\"u}r die Ausbauphase, bei der vermeintlich unabh{\"a}ngig voneinander agierende Einzelunternehmen des Ausbaus auf engem Raum miteinander um die jeweils besten Liefer- und Montagebedingungen konkurrieren. Ausgehend von einer aktuellen Großbaustelle in Jena werden verschiedene Varianten einer leistungsf{\"a}higen Baulogistik entwickelt und deren Implementierung auf der Baustelle vorbereitet werden.},
  subject      = {Baulogistik},
  language  = {de}
}
@misc{Kavrakov,
  type      = {Master Thesis},
  author    = {Kavrakov, Igor},
  title     = {Structural Optimization of Composite Cross-Sections and Elements using Energy Methods},
  doi       = {10.25643/bauhaus-universitaet.3959},
  url       = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20190815-39593},
  school      = {Bauhaus-Universit{\"a}t Weimar},
  pages     = {96},
  abstract  = {Structural optimization has gained considerable attention in the design of structural engineering structures, especially in the preliminary phase. This study introduces an unconventional approach for structural optimization by utilizing the Energy method with Integral Material Behavior (EIM), based on the Lagrange's principle of minimum potential energy. An automated two-level optimization search process is proposed, which integrates the EIM, as an alternative method for nonlinear structural analysis, and the bilevel optimization. The proposed procedure secures the equilibrium through minimizing the potential energy on one level, and on a higher level, a design objective function. For this, the most robust strategy of bilevel optimization, the nested method is used. The function of the potential energy is investigated along with its instabilities for physical nonlinear analysis through principle examples, by which the advantages and limitations using this method are reviewed. Furthermore, optimization algorithms are discussed. A numerical fully functional code is developed for nonlinear cross section, element and 2D frame analysis, utilizing different finite elements and is verified against existing EIM programs. As a proof of concept, the method is applied on selected examples using this code on cross section and element level. For the former one a comparison is made with standard procedure, by employing the equilibrium equations within the constrains. The validation of the element level was proven by a theoretical solution of an arch bridge and finally, a truss bridge is optimized. Most of the principle examples are chosen to be adequate for the everyday engineering practice, to demonstrate the effectiveness of the proposed method. This study implies that with further development, this method could become just as competitive as the conventional structural optimization techniques using the Finite Element Method.},
  subject      = {Strukturoptimierung},
  language  = {en}
}
@misc{Almasi,
  type      = {Master Thesis},
  author    = {Almasi, Ashkan},
  title     = {Stochastic Analysis of Interfacial Effects on the Polymeric Nanocomposites},
  doi       = {10.25643/bauhaus-universitaet.2433},
  url       = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20150709-24339},
  school      = {Bauhaus-Universit{\"a}t Weimar},
  abstract  = {The polymeric clay nanocomposites are a new class of materials of which recently have become the centre of attention due to their superior mechanical and physical properties. Several studies have been performed on the mechanical characterisation of these nanocomposites; however most of those studies have neglected the effect of the interfacial region between the clays and the matrix despite of its significant influence on the mechanical performance of the nanocomposites. There are different analytical methods to calculate the overall elastic material properties of the composites. In this study we use the Mori-Tanaka method to determine the overall stiffness of the composites for simple inclusion geometries of cylinder and sphere. Furthermore, the effect of interphase layer on the overall properties of composites is calculated. Here, we intend to get ounds for the effective mechanical properties to compare with the analytical results. Hence, we use linear displacement boundary conditions (LD) and uniform traction boundary conditions (UT) accordingly. Finally, the analytical results are compared with numerical results and they are in a good agreement. The next focus of this dissertation is a computational approach with a hierarchical multiscale method on the mesoscopic level. In other words, in this study we use the stochastic analysis and computational homogenization method to analyse the effect of thickness and stiffness of the interfacial region on the overall elastic properties of the clay/epoxy nanocomposites. The results show that the increase in interphase thickness, reduces the stiffness of the clay/epoxy naocomposites and this decrease becomes significant in higher clay contents. The results of the sensitivity analysis prove that the stiffness of the interphase layer has more significant effect on the final stiffness of nanocomposites. We also validate the results with the available experimental results from the literature which show good agreement.},
  language  = {en}
}
@misc{Luedtke,
  type      = {Master Thesis},
  author    = {L{\"u}dtke, Cornelius},
  title     = {Systemidentifikation von Bauteilen mittels optischer Messmethoden},
  doi       = {10.25643/bauhaus-universitaet.2429},
  url       = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20150706-24293},
  school      = {Bauhaus-Universit{\"a}t Weimar},
  pages     = {97},
  abstract  = {Im Rahmen der Forschung an Bauteil- und F{\"u}gestellend{\"a}mpfung wurden die Schwingungen der Bauteile bisher mit 1D-Laser-Vibrometern gemessen. Nun steht ein 3D-Laser-Scanner zur Verf{\"u}gung. Diese Arbeit besch{\"a}ftigt sich mit der Frage, ob mit dem 3D-Laser-Scanner bessere und weitere relevante Daten bei der Schwingungsmessung gewonnen werden k{\"o}nnen.},
  subject      = {Schwingung},
  language  = {de}
}
@misc{Damanik,
  type      = {Master Thesis},
  author    = {Damanik, Batta Septo Van Bahtiar},
  title     = {Aerodynamic Analysis of Slender Vertical Structure and Response Control with Tuned Mass Damper},
  doi       = {10.25643/bauhaus-universitaet.2471},
  url       = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20151030-24714},
  school      = {Bauhaus-Universit{\"a}t Weimar},
  abstract  = {Analysis of vortex induced vibration has gained more interest in practical held of civil engineering. The phenomenon often occurs in long and slender vertical structure like high rise building, tower, chimney or bridge pylon, which resulting in unfavorable responses and might lead to the collapse of the structures. The phenomenon appears when frequency of vortex shedding produced in the wake area of body meet the natural frequency of the structure. Even though this phenomenon does not necessarily generate a divergent amplitude response, the structure still may fail due to fatigue damage. To reduce the effect of vortex induced vibration, engineers widely use passive vibration response control system. In this case, the thesis studies the effect of tuned mass damper. The objective of this thesis is to simulate the effect of tuned mass damper in reducing unfavorable responses due to vortex induced vibration and initiated by numerical model validation with respect to wind tunnel test report. The reference structure that being used inside the thesis is Stonecutter Bridge, Hongkong. A numerical solver for computational uid dynamics named VX ow which developed by Morgenthal [6] is utilized for wind and structure simulation. The comparison between numerical model and wind tunnel result shows 10\% maximum tip displacement diference in the model of full erection freestanding tower. The tuned mass damper (TMD) model itself built separately in finite element software SOFiSTiK, and the efective damping obtained from this model then applied inside input modal data of VX ow simulation. A single TMD with mass ratio of TMD 0.5\% to the mass of first bending frequency, the maximum tip displacement is measured to be average 67\% reduced. Considering construction limitation and robustness of TMD, the effects of multiple TMD inside a structure are also studied. An uncoupled procedure of applying aeroelastic loads obtained from VX ow inside finite element software SOFiSTiK is also done to observe the optimum distribution and optimum mass ratio of multiple tuned mass damper. The rest of the properties of TMD are calculated with Den Hartog's formula. The results are as follows: peak displacement in the case of multiple TMD that distributed with polynomial spacing achieve 7.8\% more reduction performance than the one that distributed with equal spacing. Optimum mass of tuned mass damper achieved with ratio 1.25\% mass of first bending frequency corresponds to across wind direction.},
  subject      = {Aerodynamic},
  language  = {en}
}
@misc{Mukherjee,
  type      = {Master Thesis},
  author    = {Mukherjee, Nilangshu},
  title     = {A numerical comparison of the impact of different climatic conditions in different geographic locations on the construction of an office building},
  doi       = {10.25643/bauhaus-universitaet.3270},
  url       = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20170811-32700},
  school      = {Bauhaus-Universit{\"a}t Weimar},
  pages     = {127},
  abstract  = {The aim of my research is to observe the variance of energy efficiency of a typical multi-story office building under the exposure of different climatic conditions. Energy efficiency requirements in building codes or energy standards are among the most important single measures for buildings' energy efficiency. Therefore, this study can be set up for a better understanding of how energy efficiency of a building changes under the effect of adverse to moderate climatic conditions which possess a mentionable effect on the operation of a building. This thesis is structured in three balanced and conceptual steps. Following the aim of the project, the virtual building model is to be analyzed under the effect of seven distinct climatic conditions namely work environment of New Delhi, Mumbai, Berlin, Lisbon, Copenhagen, Dubai and Montreal. Firstly, the task is to do a complete literature research based on the scope of similar researches and studying the problems in detail along with the theoritical background all the concepts which are implemented to get the numerical results. This chapter also comprises a detailed study of the climatic conditions of the above-mentioned cities. Different climatic traits like temperature variations, count of heating and cooling degree days, relative humidity, temperature range and comfort zonal charts for the specified cities are studied in detail. This study helps to understand the effect of these adverse to moderate climates on the operation of the building. On the second step, the virtual building model is prepared on a software platform named Revit Structures. This virtual building model is not necessarily a complete building, but it has the relevant functionalities of a real building. We perform the energy analysis and the heating and cooling analysis on this virtual building model to study the operational outcome of the building under different climatic conditions in detail. By the end of these above two tasks, two scenarios are observed. On one hand, we have a literature research and on the other hand we have the numerical results. Therefore, finally we present a comparative scenario based on the energy efficient performances of the building under such variant climatic conditions. This is followed by the prediction of thermal comfort level inside the building and it based on Fanger's PMV Model. Understanding the literature and the numerical values in detail helps us to predict the index thermal comfort level inside the building. The conclusion of this master thesis focuses mainly on the scopes of improvement of energy efficiency requirements in energy codes if any, differentiated according to specific locations. The initial aim of my hypothesis which is to study the impacts of climatic variations on the energy efficient performances of a building is fulfilled but as such topics have very deep and broad roots, the scope of further improvements is always predominant.},
  subject      = {Klima},
  language  = {en}
}
@misc{Genc,
  type      = {Master Thesis},
  author    = {Genc, Emir},
  title     = {Decoding Public Life in Urban Soundscape: The Case of Weimar},
  doi       = {10.25643/bauhaus-universitaet.2743},
  url       = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20170213-27438},
  school      = {Bauhaus-Universit{\"a}t Weimar},
  abstract  = {INTRODUCTION The research field of sound landscape and public life, initially drew my attention during the master class of 'Media of the Urban', originally 'Medien des Urbanen, which was given by Prof. Dr. Gabriele Schabacher in the 2015 summer semester. For the relevant class, I conducted an conceptual case study in Istanbul, Beyoglu District, with the intention of analysing the perception of the space by urban sound. During the summer 2015 I recorded various sounds of different spatial settings and developed the analysis by comparing the situations. By that time, I realized the inherent property of the sound as a medium for our perception in urban context. In the 2015-2016 winter semester, I participated in the master class of the architectural project, named 'Build Allegory', which was given by Prof. Dipl.-Ing. Heike B{\"u}ttner. The project was situated in Berlin Westkreuz, AVUS north curve, on the highway and was originally a race track from 1921. In this context, the aim of my project was to answer various questions, main of which was, how does the architectural form shape the sound of the place? And, how does the sound of the place shape the architectural from? Since the place is still serving mainly to the vehicles, although the function has differed, the sound objects and the context have remained. Through the existence of contextual references, I started with creating a computational tool for analysing the acoustic characteristics of this urban setting, which is fundamentally providing results as the sound cloud, driven from the sound ray tracing method. Regarding to this soundscape analysis method, which I developed, this computational tool assisted me to find an optimum reciprocal relation between architecture and sound. Since I have been working on soundscape in the context of architecture, urban situations, public life and public space, I was determined to produce a comprehensive research in this field and propound the hypothesis; the existence of the reciprocity between the social behaviours in public space and the sound landscape. In which extent does this reciprocity exist? What are the effects of the public life on the sonic configurations of the space and the other way around?},
  subject      = {{\"O}ffentlicher Raum},
  language  = {en}
}
@misc{Piethe,
  type      = {Master Thesis},
  author    = {Piethe, Vivienne},
  title     = {Konfektionierung eines Calciumsulfat-Bindemittelsystems zur Herstellung volumenstabiler Fließestrichm{\"o}rtel},
  doi       = {10.25643/bauhaus-universitaet.3944},
  url       = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20190902-39445},
  school      = {Bauhaus-Universit{\"a}t Weimar},
  pages     = {107},
  abstract  = {Bei einem markt{\"u}blichen Calciumsulfat-Fließestrich wurden in der Praxis sch{\"a}digende Volu-menexpansionen festgestellt. Diese sind ein Resultat aus dem Zusammenwirken des einge-setzten Bindemittel-Compounds und einer kritischen Gesteinsk{\"o}rnung. Das Ziel dieser Arbeit ist es, ein Calciumsulfat-Bindemittelsystem zu konfektionieren, welches in der Lage ist, die im M{\"o}rtel festgestellten Volumenexpansionen zu unterbinden. Es sollen verschiedene Bindemittel- und Additivzusammensetzungen untersucht werden, welche in Verbindung mit der kritischen Gesteinsk{\"o}rnung die Herstellung eines volumenstabilen Fließestrichs erm{\"o}glichen. Dazu soll folgende Fragestellung beantwortet werden: Welche Ursachen hat die Volumenzunahme und wie ist diese zu minimieren bzw. unterbinden? Dabei werden unterschiedliche Bindemittelrezepturen aus α-Halbhydrat, Thermoanhydrit und Naturanhydrit, sowie verschiedene Additivzusammensetzungen hergestellt und untersucht. Durch L{\"a}ngen{\"a}nderungsmessungen in der Schwindrinne werden die Einfl{\"u}sse der Binde-mittel, der Additivzusammensetzungen und der Wasser/Bindemittel-Werte auf das L{\"a}n-gen{\"a}nderungsverhalten untersucht. Mittels Variation der einzelnen Compound-Bestandteile kann festgestellt werden, dass der Stabilisierer die L{\"a}ngen{\"a}nderung negativ beeinflusst. Dieser bindet freies Wasser, welches f{\"u}r eine Reaktion zwischen Bindemittel und Gesteins-k{\"o}rnung im plastischen Zustand nicht mehr zur Verf{\"u}gung steht. Diese Reaktion kann folglich erst im erh{\"a}rteten Zustand ablaufen und verursacht die sch{\"a}digende Volumenexpansion. Abschließend wurde ein Bindemittel-Compound konfektioniert, welcher ohne Zusatz von Stabilisierern in Zusammenhang mit der kritischen Gesteinsk{\"o}rnung volumenstabil ist und keine Sch{\"a}den ausl{\"o}st.},
  subject      = {Calciumsulfat},
  language  = {de}
}
@misc{Lang,
  type      = {Master Thesis},
  author    = {Lang, Kevin},
  title     = {Argument Search with Voice Assistants},
  doi       = {10.25643/bauhaus-universitaet.3935},
  url       = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20190617-39353},
  school      = {Bauhaus-Universit{\"a}t Weimar},
  pages     = {100},
  abstract  = {The need for finding persuasive arguments can arise in a variety of domains such as politics, finance, marketing or personal entertainment. In these domains, there is a demand to make decisions by oneself or to convince somebody about a specific topic. To obtain a conclusion, one has to search thoroughly different sources in literature and on the web to compare various arguments. Voice interfaces, in form of smartphone applications or smart speakers, present the user with natural conversations in a comfortable way to make search requests in contrast to a traditional search interface with keyboard and display. Benefits and obstacles of such a new interface are analyzed by conducting two studies. The first one consists of a survey for analyzing the target group with questions about situations, motivations, and possible demanding features. The latter one is a wizard-of-oz experiment to investigate possible queries on how a user formulates requests to such a novel system. The results indicate that a search interface with conversational abilities can build a helpful assistant, but to satisfy the demands of a broader audience some additional information retrieval and visualization features need to be implemented.},
  subject      = {Amazon Alexa},
  language  = {en}
}
@misc{Duering,
  type      = {Master Thesis},
  author    = {D{\"u}ring, Serjoscha},
  title     = {Between plan and reality: tracing the development dynamics of the Lanzhou New Area - a computational approach},
  doi       = {10.25643/bauhaus-universitaet.4000},
  url       = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20191108-40002},
  school      = {Bauhaus-Universit{\"a}t Weimar},
  pages     = {78},
  abstract  = {Contemporary planning practice is often criticized as too design-driven with a lack of both quantitative evaluation criteria and employment of models that anticipate the self-organizational forces shaping cities, resulting in significant gaps between plan and reality. This study aims to introduce a modular toolbox prototype for spatial-analysis in data-poor environments. It is proposed to integrate designing, evaluation, and monitoring of urban development into one framework, thus supporting data-driven, on-demand urban design, and planning processes. The proposed framework's value will exemplarily be tested, focussing on the analysis and simulation of spatiotemporal growth trajectories taking the Lanzhou New Area as a case-study - a large scale new town project that struggles to attract residents and businesses. Conducted analysis suggests that more attention should be given to spatiotemporal development paths to ensure that cities work more efficiently throughout any stage of development. Finally, early hints on general design strategies to achieve this goal are discussed with the assistance of the proposed toolbox.},
  subject      = {Stadtplanung},
  language  = {en}
}
@misc{vonButler,
  type      = {Master Thesis},
  author    = {von Butler, Natalie},
  title     = {Scalarization Methods for Multi-Objective Structural Optimization},
  doi       = {10.25643/bauhaus-universitaet.4010},
  url       = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20191030-40106},
  school      = {Bauhaus-Universit{\"a}t Weimar},
  pages     = {178},
  abstract  = {Scalarization methods are a category of multiobjective optimization (MOO) methods. These methods allow the usage of conventional single objective optimization algorithms, as scalarization methods reformulate the MOO problem into a single objective optimization problem. The scalarization methods analysed within this thesis are the Weighted Sum (WS), the Epsilon-Constraint (EC), and the MinMax (MM) method. After explaining the approach of each method, the WS, EC and MM are applied, a-posteriori, to three different examples: to the Kursawe function; to the ten bar truss, a common benchmark problem in structural optimization; and to the metamodel of an aero engine exit module. The aim is to evaluate and compare the performance of each scalarization method that is examined within this thesis. The evaluation is conducted using performance metrics, such as the hypervolume and the generational distance, as well as using visual comparison. The application to the three examples gives insight into the advantages and disadvantages of each method, and provides further understanding of an adequate application of the methods concerning high dimensional optimization problems.},
  subject      = {Mehrkriterielle Optimierung},
  language  = {en}
}
@misc{Bendalla,
  type      = {Master Thesis},
  author    = {Bendalla, Abdulmagid Sedig Khalafallah},
  title     = {Nonlinear Numerical Modelling of Cable Elements in Bridges for Dynamic Analysis},
  doi       = {10.25643/bauhaus-universitaet.3994},
  url       = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20191007-39940},
  school      = {Bauhaus-Universit{\"a}t Weimar},
  pages     = {107},
  abstract  = {Identifying cable force with vibration-based methods has become widely used in engineering practice due to simplicity of application. The string taut theory provides a simple definition of the relationship between natural frequencies and the tension force of a cable. However, this theory assumes a perfectly flexible non-sagging cable pinned at its ends. These assumptions do not reflect all cases, especially when the cable is short, under low tension forces or the supports are partially flexible. Extradosed bridges, which are distinguished from cable-stayed bridges by their low pylon height, have shorter cables. Therefore the application of the conventional string taut theory to identify cable forces on extradosed bridge cables might be inadequate to identify cable forces. In this work, numerical modelling of an extradosed bridge cable saddled on a circular deviator at pylon is conducted. The model is validated with the catenary analytical solution and its static and dynamic behaviours are studied. The effect of a saddle support is found to positively affect the cable stiffness by geometric means; longer saddle radius increases the cable stiffness by suppressing the deformations near the saddle. Further, accounting the effects of bending stiffness in the numerical model by using beam elements show considerable deviation from models with truss elements (i.e. zero bending stiffness). This deviation is manifested when comparing the static and dynamic properties. This motivates a more thorough study of bending stiffness effects on short cables. Bending stiffness effects are studied using two rods connected with several springs along their length. Under bending moments, the springs resist the rods' relative axial displacement by the springs' transverse component. This concept is used to identify bending stiffness values by utilizing the parallel axis theorem to quantify ratios of the second moment of area. These ratios are calculated based on the setup of the springs (e.g. number of springs per unit length, transverse stiffness, etc...). The numerical model based on this concept agrees well with the theoretical values computed using upper and lower bounds of the parallel axis theorem. The proposed concept of quantifying ratios of the second moment of area using springs as connection between cable rods is applied on an actual extradosed bridge geometry. The model is examined by comparison to the previously validated global numerical model. The two models showed good correlation under various changing parameters. This allowed further study of the effects of stick/slip behaviour between cable rods on an actual bridge geometry.},
  subject      = {Kabel},
  language  = {en}
}