@inproceedings{WiggenbrockSmarsly, author = {Wiggenbrock, Jens and Smarsly, Kay}, title = {A GENERIC FRAMEWORK SUPPORTING DISTRIBUTED COMPUTING IN ENGINEERING APPLICATIONS}, series = {Digital Proceedings, International Conference on the Applications of Computer Science and Mathematics in Architecture and Civil Engineering : July 20 - 22 2015, Bauhaus-University Weimar}, booktitle = {Digital Proceedings, International Conference on the Applications of Computer Science and Mathematics in Architecture and Civil Engineering : July 20 - 22 2015, Bauhaus-University Weimar}, editor = {G{\"u}rlebeck, Klaus and Lahmer, Tom}, organization = {Bauhaus-Universit{\"a}t Weimar}, issn = {1611-4086}, doi = {10.25643/bauhaus-universitaet.2826}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20170314-28260}, pages = {9}, abstract = {Modern distributed engineering applications are based on complex systems consisting of various subsystems that are connected through the Internet. Communication and collaboration within an entire system requires reliable and efficient data exchange between the subsystems. Middleware developed within the web evolution during the past years provides reliable and efficient data exchange for web applications, which can be adopted for solving the data exchange problems in distributed engineering applications. This paper presents a generic approach for reliable and efficient data exchange between engineering devices using existing middleware known from web applications. Different existing middleware is examined with respect to the suitability in engineering applications. In this paper, a suitable middleware is shown and a prototype implementation simulating distributed wind farm control is presented and validated using several performance measurements.}, subject = {Angewandte Informatik}, language = {en} } @inproceedings{Beese, author = {Beese, Christine}, title = {About the Internationality of Urbanism: The Influence of International Town Planning Ideas upon Marcello Piacentini's Work}, series = {Urban design and dictatorship in the 20th century: Italy, Portugal, the Soviet Union, Spain and Germany. History and Historiography}, booktitle = {Urban design and dictatorship in the 20th century: Italy, Portugal, the Soviet Union, Spain and Germany. History and Historiography}, doi = {10.25643/bauhaus-universitaet.2409}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20150619-24093}, pages = {1 -- 22}, abstract = {Beitr{\"a}ge zum Symposium „Urban design and dictatorship in the 20th century: Italy, Portugal, the Soviet Union, Spain and Germany. History and Historiography". Weimar, 21.-22. November 2013}, subject = {St{\"a}dtebau}, language = {en} } @inproceedings{NasirBargstaedt, author = {Nasir, A.R. and Bargst{\"a}dt, Hans-Joachim}, title = {AMELIORATING EMPLOYABILITY IN CONSTRUCTION THROUGH BIM INNOVATION}, series = {Digital Proceedings, International Conference on the Applications of Computer Science and Mathematics in Architecture and Civil Engineering : July 20 - 22 2015, Bauhaus-University Weimar}, booktitle = {Digital Proceedings, International Conference on the Applications of Computer Science and Mathematics in Architecture and Civil Engineering : July 20 - 22 2015, Bauhaus-University Weimar}, editor = {G{\"u}rlebeck, Klaus and Lahmer, Tom}, organization = {Bauhaus-Universit{\"a}t Weimar}, issn = {1611-4086}, doi = {10.25643/bauhaus-universitaet.2815}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20170314-28157}, pages = {6}, abstract = {Low-skilled labor makes a significant part of the construction sector, performing daily production tasks that do not require specific technical knowledge or confirmed skills. Today, construction market demands increasing skill levels. Many jobs that were once considered to be undertaken by low or un-skilled labor, now demand some kind of formal skills. The jobs that require low skilled labor are continually decreasing due to technological advancement and globalization. Jobs that previously required little or no training now require skilful people to perform the tasks appropriately. The study aims at ameliorating employability of less skilled manpower by finding ways to instruct them for performing constructions tasks. A review of exiting task instruction methodologies in construction and the underlying gaps within them warrants an appropriate way to train and instruct low skilled workers for the tasks in construction. The idea is to ensure the required quality of construction with technological and didactic aids seeming particularly purposeful to prepare potential workers for the tasks in construction without exposing them to existing communication barriers. A BIM based technology is considered promising along with the integration of visual directives/animations to elaborate the construction tasks scheduled to be carried on site.}, subject = {Angewandte Informatik}, language = {en} } @inproceedings{LopesRodriguesVilaReal, author = {Lopes, Nuno and Rodrigues, Daniela and Vila Real, Paulo}, title = {ANALYSIS OF STEEL STRUCTURAL MEMBERS IN FIRE WITH SLENDER CROSS-SECTIONS THROUGH BEAM FINITE ELEMENTS APPLYING AN EFFECTIVE CONSTITUTIVE LAW}, series = {Digital Proceedings, International Conference on the Applications of Computer Science and Mathematics in Architecture and Civil Engineering : July 20 - 22 2015, Bauhaus-University Weimar}, booktitle = {Digital Proceedings, International Conference on the Applications of Computer Science and Mathematics in Architecture and Civil Engineering : July 20 - 22 2015, Bauhaus-University Weimar}, editor = {G{\"u}rlebeck, Klaus and Lahmer, Tom}, organization = {Bauhaus-Universit{\"a}t Weimar}, issn = {1611-4086}, doi = {10.25643/bauhaus-universitaet.2811}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20170314-28116}, pages = {6}, abstract = {Steel profiles with slender cross-sections are characterized by their high susceptibility to instability phenomena, especially local buckling, which are intensified under fire conditions. This work presents a study on numerical modelling of the behaviour of steel structural elements in case of fire with slender cross-sections. To accurately carry out these analyses it is necessary to take into account those local instability modes, which normally is only possible with shell finite elements. However, aiming at the development of more expeditious methods, particularly important for analysing complete structures in case of fire, recent studies have proposed the use of beam finite elements considering the presence of local buckling through the implementation of a new effective steel constitutive law. The objective of this work is to develop a study to validate this methodology using the program SAFIR. Comparisons are made between the results obtained applying the referred new methodology and finite element analyses using shell elements. The studies were made to laterally restrained beams, unrestrained beams, axially compressed columns and columns subjected to bending plus compression.}, subject = {Angewandte Informatik}, language = {en} } @inproceedings{MeierSchanz, author = {Meier, J{\"o}rg and Schanz, Tom}, title = {Benchmarking of Optimization Algorithms}, series = {Digital Proceedings, International Conference on the Applications of Computer Science and Mathematics in Architecture and Civil Engineering : July 20 - 22 2015, Bauhaus-University Weimar}, booktitle = {Digital Proceedings, International Conference on the Applications of Computer Science and Mathematics in Architecture and Civil Engineering : July 20 - 22 2015, Bauhaus-University Weimar}, editor = {G{\"u}rlebeck, Klaus and Lahmer, Tom}, organization = {Bauhaus-Universit{\"a}t Weimar}, issn = {1611-4086}, doi = {10.25643/bauhaus-universitaet.2813}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20170314-28134}, pages = {6}, abstract = {In this paper, we present an empirical approach for objective and quantitative benchmarking of optimization algorithms with respect to characteristics induced by the forward calculation. Due to the professional background of the authors, this benchmarking strategy is illustrated on a selection of search methods in regard to expected characteristics of geotechnical parameter back calculation problems. Starting from brief introduction into the approach employed, a strategy for optimization algorithm benchmarking is introduced. The benchmarking utilizes statistical tests carried out on well-known test functions superposed with perturbations, both chosen to mimic objective function topologies found for geotechnical objective function topologies. Here, the moved axis parallel hyper-ellipsoid test function and the generalized Ackley test function in conjunction with an adjustable quantity of objective function topology roughness and fraction of failing forward calculations is analyzed. In total, results for 5 optimization algorithms are presented, compared and discussed.}, subject = {Angewandte Informatik}, language = {en} } @inproceedings{AlaladeKafleWuttkeetal., author = {Alalade, Muyiwa and Kafle, Binod and Wuttke, Frank and Lahmer, Tom}, title = {CALIBRATION OF CYCLIC CONSTITUTIVE MODELS FOR SOILS BY OSCILLATING FUNCTIONS}, series = {Digital Proceedings, International Conference on the Applications of Computer Science and Mathematics in Architecture and Civil Engineering : July 20 - 22 2015, Bauhaus-University Weimar}, booktitle = {Digital Proceedings, International Conference on the Applications of Computer Science and Mathematics in Architecture and Civil Engineering : July 20 - 22 2015, Bauhaus-University Weimar}, editor = {G{\"u}rlebeck, Klaus and Lahmer, Tom}, organization = {Bauhaus-Universit{\"a}t Weimar}, issn = {1611-4086}, doi = {10.25643/bauhaus-universitaet.2793}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20170314-27932}, pages = {6}, abstract = {In order to minimize the probability of foundation failure resulting from cyclic action on structures, researchers have developed various constitutive models to simulate the foundation response and soil interaction as a result of these complex cyclic loads. The efficiency and effectiveness of these model is majorly influenced by the cyclic constitutive parameters. Although a lot of research is being carried out on these relatively new models, little or no details exist in literature about the model based identification of the cyclic constitutive parameters. This could be attributed to the difficulties and complexities of the inverse modeling of such complex phenomena. A variety of optimization strategies are available for the solution of the sum of least-squares problems as usually done in the field of model calibration. However for the back analysis (calibration) of the soil response to oscillatory load functions, this paper gives insight into the model calibration challenges and also puts forward a method for the inverse modeling of cyclic loaded foundation response such that high quality solutions are obtained with minimum computational effort. Therefore model responses are produced which adequately describes what would otherwise be experienced in the laboratory or field.}, subject = {Angewandte Informatik}, language = {en} } @inproceedings{Koenig, author = {K{\"o}nig, Reinhard}, title = {CPlan: An Open Source Library for Computational Analysis and Synthesis}, series = {33rd eCAADe Conference}, booktitle = {33rd eCAADe Conference}, editor = {Martens, Bob and Wurzer, G, Gabriel and Grasl, Tomas and Lorenz, Wolfgang and Schaffranek, Richard}, publisher = {Vienna University of Technology}, address = {Vienna}, doi = {10.25643/bauhaus-universitaet.2503}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20160118-25037}, pages = {245 -- 250}, abstract = {Some caad packages offer additional support for the optimization of spatial configurations, but the possibilities for applying optimization are usually limited either by the complexity of the data model or by the constraints of the underlying caad system. Since we missed a system that allows to experiment with optimization techniques for the synthesis of spatial configurations, we developed a collection of methods over the past years. This collection is now combined in the presented open source library for computational planning synthesis, called CPlan. The aim of the library is to provide an easy to use programming framework with a flat learning curve for people with basic programming knowledge. It offers an extensible structure that allows to add new customized parts for various purposes. In this paper the existing functionality of the CPlan library is described.}, subject = {Architektur}, language = {en} } @inproceedings{MuellerLudwigSchulteSchreppingetal., author = {Mueller, Matthias and Ludwig, Horst-Michael and Schulte-Schrepping, Christoph and Breitenb{\"u}cher, Rolf}, title = {Dauerhafte Betonfahrbahndecken durch Verwendung unterschiedlicher Bindemittel in Ober- und Unterbeton}, series = {Tagungsband 19. Ibausil - 19. Internationale Baustofftagung, 16. - 18.09.2015, Weimar. Band 2}, booktitle = {Tagungsband 19. Ibausil - 19. Internationale Baustofftagung, 16. - 18.09.2015, Weimar. Band 2}, editor = {Ludwig, Horst-Michael}, organization = {F.A.Finger-Institut f{\"u}r Baustoffkunde, Bauhaus-Universit{\"a}t Weimar}, isbn = {978-3-00-050225-5 (Bauhaus-Universit{\"a}tsverlag Weimar)}, doi = {10.25643/bauhaus-universitaet.4871}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20240507-48711}, pages = {2536-2543}, abstract = {Gem{\"a}ß dem Regelwerk f{\"u}r Betonstraßen muss f{\"u}r zweischichtige Betonfahrbahndecken derselbe Zement in Ober- und Unterbeton verwendet werden. Weiterhin ist die Anrechnung von Flugasche auf den w/z-Wert nicht gestattet. Durch eine flexiblere Handhabung der Bindemittel k{\"o}nnten sich Vorteile f{\"u}r die Betonbauweise ergeben. So k{\"o}nnte z.B. der st{\"a}rker durch Frost beanspruchte Oberbeton mit CEM I hergestellt werden, w{\"a}hrend Zemente mit h{\"o}heren H{\"u}ttensandgehalten nur im Unterbeton angewendet werden. Im Unterbeton k{\"o}nnten dann Gesteinsk{\"o}rnungen eingesetzt werden, die in einer herk{\"o}mmlichen CEM I-Rezeptur als AKR-kritisch eingestuft w{\"u}rden. Anhand von AKR-Performance-Pr{\"u}fungen konnte die hohe Wirksamkeit h{\"u}ttensandhaltiger Zemente sowie auch von Flugasche auf die AKR-Verminderung aufgezeigt werden. Schon mit einem CEM II/B-S wurden AKR-kritische Rezepturen in den unkritischen Bereich verschoben. Der Frost-Tausalz-Widerstand der Betone wurde bei hohen Gehalten an H{\"u}ttensand bzw. H{\"u}ttensand + Flugasche verringert, bewegte sich aber in jedem Fall noch im g{\"u}nstigen Bereich. Um eine Beeintr{\"a}chtigung der baupraktischen Umsetzbarkeit zu vermeiden, sollte sich die Festigkeitsentwicklung von Ober- und Unterbeton im jungen Alter nicht zu stark unterscheiden. Modellberechnungen zur Festlegung einer Mindestfestigkeit f{\"u}r die fr{\"u}he Belastung sind derzeit noch in Bearbeitung.}, subject = {Beton}, language = {de} } @inproceedings{JahrSchlichDragosetal., author = {Jahr, Katrin and Schlich, Robert and Dragos, Kosmas and Smarsly, Kay}, title = {DECENTRALIZED AUTONOMOUS FAULT DETECTION IN WIRELESS STRUCTURAL HEALTH MONITORING SYSTEMS USING STRUCTURAL RESPONSE DATA}, series = {Digital Proceedings, International Conference on the Applications of Computer Science and Mathematics in Architecture and Civil Engineering : July 20 - 22 2015, Bauhaus-University Weimar}, booktitle = {Digital Proceedings, International Conference on the Applications of Computer Science and Mathematics in Architecture and Civil Engineering : July 20 - 22 2015, Bauhaus-University Weimar}, editor = {G{\"u}rlebeck, Klaus and Lahmer, Tom}, organization = {Bauhaus-Universit{\"a}t Weimar}, issn = {1611-4086}, doi = {10.25643/bauhaus-universitaet.2803}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20170314-28031}, pages = {8}, abstract = {Sensor faults can affect the dependability and the accuracy of structural health monitoring (SHM) systems. Recent studies demonstrate that artificial neural networks can be used to detect sensor faults. In this paper, decentralized artificial neural networks (ANNs) are applied for autonomous sensor fault detection. On each sensor node of a wireless SHM system, an ANN is implemented to measure and to process structural response data. Structural response data is predicted by each sensor node based on correlations between adjacent sensor nodes and on redundancies inherent in the SHM system. Evaluating the deviations (or residuals) between measured and predicted data, sensor faults are autonomously detected by the wireless sensor nodes in a fully decentralized manner. A prototype SHM system implemented in this study, which is capable of decentralized autonomous sensor fault detection, is validated in laboratory experiments through simulated sensor faults. Several topologies and modes of operation of the embedded ANNs are investigated with respect to the dependability and the accuracy of the fault detection approach. In conclusion, the prototype SHM system is able to accurately detect sensor faults, demonstrating that neural networks, processing decentralized structural response data, facilitate autonomous fault detection, thus increasing the dependability and the accuracy of structural health monitoring systems.}, subject = {Angewandte Informatik}, language = {en} } @inproceedings{FerreiraVieira, author = {Ferreira, Milton dos Santos and Vieira, Nelson}, title = {EIGENFUNCTIONS AND FUNDAMENTAL SOLUTIONS FOR THE FRACTIONAL LAPLACIAN IN 3 DIMENSIONS}, series = {Digital Proceedings, International Conference on the Applications of Computer Science and Mathematics in Architecture and Civil Engineering : July 20 - 22 2015, Bauhaus-University Weimar}, booktitle = {Digital Proceedings, International Conference on the Applications of Computer Science and Mathematics in Architecture and Civil Engineering : July 20 - 22 2015, Bauhaus-University Weimar}, editor = {G{\"u}rlebeck, Klaus and Lahmer, Tom}, organization = {Bauhaus-Universit{\"a}t Weimar}, issn = {1611-4086}, doi = {10.25643/bauhaus-universitaet.2796}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20170314-27968}, pages = {6}, abstract = {Recently there has been a surge of interest in PDEs involving fractional derivatives in different fields of engineering. In this extended abstract we present some of the results developedin [3]. We compute the fundamental solution for the three-parameter fractional Laplace operator Δ by transforming the eigenfunction equation into an integral equation and applying the method of separation of variables. The obtained solutions are expressed in terms of Mittag-Leffer functions. For more details we refer the interested reader to [3] where it is also presented an operational approach based on the two Laplace transform.}, subject = {Angewandte Informatik}, language = {en} }