@article{ArtusAlabassyKoch, author = {Artus, Mathias and Alabassy, Mohamed Said Helmy and Koch, Christian}, title = {A BIM Based Framework for Damage Segmentation, Modeling, and Visualization Using IFC}, series = {Applied Sciences}, volume = {2022}, journal = {Applied Sciences}, number = {volume 12, issue 6, article 2772}, publisher = {MDPI}, address = {Basel}, doi = {10.3390/app12062772}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20220314-46059}, pages = {1 -- 24}, abstract = {Paper-based data acquisition and manual transfer between incompatible software or data formats during inspections of bridges, as done currently, are time-consuming, error-prone, cumbersome, and lead to information loss. A fully digitized workflow using open data formats would reduce data loss, efforts, and the costs of future inspections. On the one hand, existing studies proposed methods to automatize data acquisition and visualization for inspections. These studies lack an open standard to make the gathered data available for other processes. On the other hand, several studies discuss data structures for exchanging damage information among different stakeholders. However, those studies do not cover the process of automatic data acquisition and transfer. This study focuses on a framework that incorporates automatic damage data acquisition, transfer, and a damage information model for data exchange. This enables inspectors to use damage data for subsequent analyses and simulations. The proposed framework shows the potentials for a comprehensive damage information model and related (semi-)automatic data acquisition and processing.}, subject = {Building Information Modeling}, language = {en} } @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{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} } @misc{Alabassy, type = {Master Thesis}, author = {Alabassy, Mohamed Said Helmy}, title = {Automated Approach for Building Information Modelling of Crack Damages via Image Segmentation and Image-based 3D Reconstruction}, doi = {10.25643/bauhaus-universitaet.6416}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20230818-64162}, school = {Bauhaus-Universit{\"a}t Weimar}, pages = {101}, abstract = {As machine vision-based inspection methods in the field of Structural Health Monitoring (SHM) continue to advance, the need for integrating resulting inspection and maintenance data into a centralised building information model for structures notably grows. Consequently, the modelling of found damages based on those images in a streamlined automated manner becomes increasingly important, not just for saving time and money spent on updating the model to include the latest information gathered through each inspection, but also to easily visualise them, provide all stakeholders involved with a comprehensive digital representation containing all the necessary information to fully understand the structure's current condition, keep track of any progressing deterioration, estimate the reduced load bearing capacity of the damaged element in the model or simulate the propagation of cracks to make well-informed decisions interactively and facilitate maintenance actions that optimally extend the service life of the structure. Though significant progress has been recently made in information modelling of damages, the current devised methods for the geometrical modelling approach are cumbersome and time consuming to implement in a full-scale model. For crack damages, an approach for a feasible automated image-based modelling is proposed utilising neural networks, classical computer vision and computational geometry techniques with the aim of creating valid shapes to be introduced into the information model, including related semantic properties and attributes from inspection data (e.g., width, depth, length, date, etc.). The creation of such models opens the door for further possible uses ranging from more accurate structural analysis possibilities to simulation of damage propagation in model elements, estimating deterioration rates and allows for better documentation, data sharing, and realistic visualisation of damages in a 3D model.}, subject = {Building Information Modeling}, 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} } @masterthesis{Steinkrauss, type = {Bachelor Thesis}, author = {Steinkrauß, Tobias}, title = {Building Information Modeling im Erdbau - eine Potentialanalyse im Spezialtiefbau}, doi = {10.25643/bauhaus-universitaet.2614}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20160623-26140}, school = {Bauhaus-Universit{\"a}t Weimar}, abstract = {Jede Baumaßnahme ist durch einen Unikatcharakter gepr{\"a}gt. Individuelle Planung, Vergabe und Bauvorg{\"a}nge stellen immer wieder aufs Neue eine große Herausforderung dar. Durch die sich teilweise sehr schnell {\"a}ndernden Randbedingungen, m{\"u}ssen erarbeitete Abl{\"a}ufe h{\"a}ufig schnell ge{\"a}ndert werden. Dies geschieht heutzutage meist auf Grundlage von Erfahrungen der am Bau Beteiligten. Auch bei bester Planung und Vorbereitung k{\"o}nnen Unw{\"a}gbarkeiten den Bauprozess aufhalten. Das k{\"o}nnen ungeeigneter Baugrund, verschiedenste Hinderungen im Baufeld, schlechte Witterungsverh{\"a}ltnisse, Ausf{\"a}lle von Maschinen, ver{\"a}nderte Zielsetzungen des Auftraggebers und vieles mehr sein. Dies f{\"u}hrt zu Bauzeitverl{\"a}ngerungen und damit zu Kostensteigerungen. Um diesen Problemen besser begegnen zu k{\"o}nnen und diesen komplexen und fehler-anf{\"a}lligen Prozess zu unterst{\"u}tzen, sind ein verbesserter Informationsfluss, genauere Boden-aufschl{\"u}sse und eine exaktere Dimensionierung des einzusetzenden Ger{\"a}tes notwendig. Aus diesen Gr{\"u}nden ist der Einsatz von Building Information Modeling (BIM) sinnvoll. BIM bietet die M{\"o}glichkeit den Informationsfluss zu verbessern, die Datengenauigkeit zu erh{\"o}hen und Abl{\"a}ufe zu optimieren. Außerdem erm{\"o}glicht die Anwendung Planungsschritte miteinander zu verkn{\"u}pfen, Kalkulationen zu vereinfachen und das Erstellen eines intelligenten Modells, das {\"u}ber den gesamten Lebenszyklus erweitert werden kann. Die Maßnahmen des Spezialtiefbaus z{\"a}hlen zu den kostenintensivsten auf einer Baustelle. Großes Ger{\"a}t und spezialisierte Firmen sind f{\"u}r eine erfolgreiche Durchf{\"u}hrung unerl{\"a}sslich. Da der Baugrund immer einen großen Unsicherheitsfaktor bildet, m{\"u}ssen geeignete, unterst{\"u}tzende Anwendungen zum Einsatz kommen. Hierf{\"u}r bildet BIM eine geeignete Plattform. Protokolle, Maschinendaten und Kontrolldaten k{\"o}nnen hier webbasiert analysiert und f{\"u}r alle zug{\"a}nglich gemacht werden, um zum einen die Transparenz zu steigern und zum anderen den {\"U}berblick, selbst bei hochkomplexen Bauvorhaben zu behalten. In dieser Arbeit soll ein {\"U}berblick {\"u}ber die aktuelle Forschungssituation im Bereich Building Information Modeling im Erdbau, speziell im Spezialtiefbau, gegeben werden. Die Ergebnisse die mit Hilfe vorhandener Publikationen und Forschungsarbeiten verschiedener Universit{\"a}ten und namhafter Forschungsgruppen zusammengetragen wurden sollen eine Grundlage f{\"u}r die weitere Forschung in diesem Bereich bilden. {\"U}ber die Aufgabenstellung hinaus wird zus{\"a}tzlich mit dem Softwareprogramm Revit 2014 ein Modell erstellt. Es wird versucht eine {\"u}berschnittene Bohrpfahlwand zu modellieren und sie mit Parametern auszustatten. Zusammenfassend wird das Programm f{\"u}r den Einsatz bewertet.}, subject = {Erdbau}, language = {de} } @masterthesis{Kratt, type = {Bachelor Thesis}, author = {Kratt, Helen}, title = {Building Information Modeling im Erdbau - eine Potentialanalyse im Tiefbau}, doi = {10.25643/bauhaus-universitaet.2613}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20160623-26132}, school = {Bauhaus-Universit{\"a}t Weimar}, abstract = {Die meisten Baustellen bieten Optimierungspotential. Vor allem der Erdbau fordert durch seine hohe Dynamik und großen Unsicherheiten eine hohe Planungsleistung f{\"u}r jedes neue Projekt. Doch auch bei bester Planung und Vorbereitung kann der Bauprozess durch nicht vorhersehbare Einwirkungen aufgehalten werden. Dazu z{\"a}hlen Witterungseinfl{\"u}sse, Baumaschinenausf{\"a}lle, unvorhergesehene Bodenschichten und ver{\"a}nderte Zielsetzungen des Auftraggebers. Dies kann zu St{\"o}rungen im Bauablauf f{\"u}hren, die eine Bauzeitverz{\"o}gerung und eine Kostensteigerung nach sich ziehen. Um diese Probleme zu umgehen, sind ein verbesserter Informationsfluss, genaue Bodenaufschl{\"u}sse und eine exakte Dimensionierung des einzusetzenden Ger{\"a}tes notwendig. Hier kann Building Information Modeling (BIM) zum Einsatz kommen. Diese Anwendung bietet die M{\"o}glichkeit, die Datengenauigkeit zu erh{\"o}hen, den Informationsfluss auf der Baustelle zu verbessern, eine Informationsplattform f{\"u}r alle Beteiligten zu schaffen und die Abl{\"a}ufe transparent zu gestalten. Außerdem erm{\"o}glicht die Anwendung Planungsschritte miteinander zu verkn{\"u}pfen, Kalkulationen zu vereinfachen und das Erstellen eines intelligenten Modells, das {\"u}ber den gesamten Lebenszyklus erweitert werden kann. Die Grundlagen dieser Arbeit bilden die Begriffsdefinitionen zu Erdbau, Tiefbau und Building Information Modeling. Diese Arbeit setzt sich speziell mit Erdbauwerken und deren Sicherungsmaßnahmen auseinander. Darauf aufbauend wird im Rahmen einer Recherche der Forschungsstand im Bereich Building Information Modeling und Tiefbau zusammengefasst. Mit Hilfe einiger Forschungsbeitr{\"a}ge, -projekte, -verb{\"a}nde, Dissertationen und Anwendungsprogrammen wird ein {\"U}berblick geschaffen. Die {\"U}bersicht soll eine Grundlage f{\"u}r die weitere Forschung auf diesem Gebiet bilden. Abschließend findet eine Bewertung statt. {\"U}ber die Aufgabenstellung hinaus wird zus{\"a}tzlich mit dem Softwareprogramm Revit 2014 ein Modell erstellt, um aufzuzeigen, dass das Potential auf Erdbaustellen mit BIM-Anwendungen besser ausgesch{\"o}pft werden kann. Es wird versucht eine Gabionenwand, eine Sicherungsmaßnahme von Erdbauwerken zu modellieren und sie mit Parametern auszustatten. Zusammenfassend wird das Programm f{\"u}r den Einsatz im Tiefbau bewertet.}, subject = {Erdbau}, language = {de} } @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} } @article{Bargstaedt, author = {Bargst{\"a}dt, Hans-Joachim}, title = {Challenges of BIM for Construction Site Operations}, series = {Procedia Engineering}, journal = {Procedia Engineering}, doi = {10.1016/j.proeng.2015.08.123}, url = {http://nbn-resolving.de/urn:nbn:de:gbv:wim2-20170413-31218}, pages = {52 -- 59}, abstract = {Building Information Modeling is a powerful tool for the design and for a consistent set of data in a virtual storage. For the application in the phases of realization and on site it needs further development. The paper describes main challenges and main features, which will help the development of software to better service the needs of construction site managers}, subject = {Building Information Modeling}, language = {en} }