TY - CHAP A1 - Khosravian, Reza A1 - Wuttke, Frank ED - Gürlebeck, Klaus ED - Lahmer, Tom T1 - QUALITATIVE INVESTIGATION OF THE EFFECT OF SOIL MODELING APPROACH ON DYNAMIC BEHAVIOR OF A SMALL-SCALE 2-DOF STRUCTURE WITH PILE FOUNDATION T2 - Digital Proceedings, International Conference on the Applications of Computer Science and Mathematics in Architecture and Civil Engineering : July 20 - 22 2015, Bauhaus-University Weimar N2 - Known as a sophisticated phenomenon in civil engineering problems, soil structure interaction has been under deep investigations in the field of Geotechnics. On the other hand, advent of powerful computers has led to development of numerous numerical methods to deal with this phenomenon, resulting in a wide variety of methods trying to simulate the behavior of the soil stratum. This survey studies two common approaches to model the soil’s behavior in a system consisting of a structure with two degrees of freedom, representing a two-storey frame structure made of steel, with the column resting on a pile embedded into sand in laboratory scale. The effect of soil simulation technique on the dynamic behavior of the structure is of major interest in the study. Utilized modeling approaches are the so-called Holistic method, and substitution of soil with respective impedance functions. KW - Angewandte Informatik KW - Angewandte Mathematik KW - Building Information Modeling KW - Computerunterstütztes Verfahren KW - Data, information and knowledge modeling in civil engineering; Function theoretic methods and PDE in engineering sciences; Mathematical methods for (robotics and) computer vision; Numerical modeling in engineering; Optimization in engineering applications Y1 - 2015 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:gbv:wim2-20170314-28080 SN - 1611-4086 ER - TY - CHAP A1 - Ignatova, Elena A1 - Kirschke, Heiko A1 - Tauscher, Eike A1 - Smarsly, Kay ED - Gürlebeck, Klaus ED - Lahmer, Tom T1 - PARAMETRIC GEOMETRIC MODELING IN CONSTRUCTION PLANNING USING INDUSTRY FOUNDATION CLASSES T2 - Digital Proceedings, International Conference on the Applications of Computer Science and Mathematics in Architecture and Civil Engineering : July 20 - 22 2015, Bauhaus-University Weimar N2 - One of the most promising and recent advances in computer-based planning is the transition from classical geometric modeling to building information modeling (BIM). Building information models support the representation, storage, and exchange of various information relevant to construction planning. This information can be used for describing, e.g., geometric/physical properties or costs of a building, for creating construction schedules, or for representing other characteristics of construction projects. Based on this information, plans and specifications as well as reports and presentations of a planned building can be created automatically. A fundamental principle of BIM is object parameterization, which allows specifying geometrical, numerical, algebraic and associative dependencies between objects contained in a building information model. In this paper, existing challenges of parametric modeling using the Industry Foundation Classes (IFC) as a federated model for integrated planning are shown, and open research questions are discussed. KW - Angewandte Informatik KW - Angewandte Mathematik KW - Building Information Modeling KW - Computerunterstütztes Verfahren KW - Data, information and knowledge modeling in civil engineering; Function theoretic methods and PDE in engineering sciences; Mathematical methods for (robotics and) computer vision; Numerical modeling in engineering; Optimization in engineering applications Y1 - 2015 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:gbv:wim2-20170314-28024 SN - 1611-4086 ER - TY - CHAP A1 - Nguyen-Tuan, Long A1 - Lahmer, Tom A1 - Datcheva, Maria A1 - Stoimenova, Eugenia A1 - Schanz, Tom ED - Gürlebeck, Klaus ED - Lahmer, Tom T1 - PARAMETER IDENTIFICATION APPLYING IN COMPLEX THERMO-HYDRO-MECHANICAL PROBLEMS LIKE THE DESIGN OF BUFFER ELEMENTS T2 - Digital Proceedings, International Conference on the Applications of Computer Science and Mathematics in Architecture and Civil Engineering : July 20 - 22 2015, Bauhaus-University Weimar N2 - This study contributes to the identification of coupled THM constitutive model parameters via back analysis against information-rich experiments. A sampling based back analysis approach is proposed comprising both the model parameter identification and the assessment of the reliability of identified model parameters. The results obtained in the context of buffer elements indicate that sensitive parameter estimates generally obey the normal distribution. According to the sensitivity of the parameters and the probability distribution of the samples we can provide confidence intervals for the estimated parameters and thus allow a qualitative estimation on the identified parameters which are in future work used as inputs for prognosis computations of buffer elements. These elements play e.g. an important role in the design of nuclear waste repositories. KW - Angewandte Informatik KW - Angewandte Mathematik KW - Building Information Modeling KW - Computerunterstütztes Verfahren KW - Data, information and knowledge modeling in civil engineering; Function theoretic methods and PDE in engineering sciences; Mathematical methods for (robotics and) computer vision; Numerical modeling in engineering; Optimization in engineering applications Y1 - 2015 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:gbv:wim2-20170314-28162 SN - 1611-4086 ER - TY - CHAP A1 - Stokmaier, Markus A1 - Class, A.G. A1 - Schulenberg, T. A1 - Lahey Jr., R.T ED - Gürlebeck, Klaus ED - Lahmer, Tom T1 - OPTIMISING ACOUSTIC RESONATORS FOR SONOFUSION EXPERIMENTS WITH EVOLUTIONARY ALGORITHMS T2 - Digital Proceedings, International Conference on the Applications of Computer Science and Mathematics in Architecture and Civil Engineering : July 20 - 22 2015, Bauhaus-University Weimar N2 - The sizing of simple resonators like guitar strings or laser mirrors is directly connected to the wavelength and represents no complex optimisation problem. This is not the case with liquid-filled acoustic resonators of non-trivial geometries, where several masses and stiffnesses of the structure and the fluid have to fit together. This creates a scenario of many competing and interacting resonances varying in relative strength and frequency when design parameters change. Hence, the resonator design involves a parameter-tuning problem with many local optima. As its solution evolutionary algorithms (EA) coupled to a forced-harmonic FE simulation are presented. A new hybrid EA is proposed and compared to two state-of-theart EAs based on selected test problems. The motivating background is the search for better resonators suitable for sonofusion experiments where extreme states of matter are sought in collapsing cavitation bubbles. KW - Angewandte Informatik KW - Angewandte Mathematik KW - Building Information Modeling KW - Computerunterstütztes Verfahren KW - Data, information and knowledge modeling in civil engineering; Function theoretic methods and PDE in engineering sciences; Mathematical methods for (robotics and) computer vision; Numerical modeling in engineering; Optimization in engineering applications Y1 - 2015 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:gbv:wim2-20170314-28202 SN - 1611-4086 ER - TY - CHAP A1 - Hölter, Raoul A1 - Mahmoudi, Elham A1 - Schanz, Tom ED - Gürlebeck, Klaus ED - Lahmer, Tom T1 - OPTIMAL SENSOR LOCATION FOR PARAMETER IDENTIFICATION IN SOFT CLAY T2 - Digital Proceedings, International Conference on the Applications of Computer Science and Mathematics in Architecture and Civil Engineering : July 20 - 22 2015, Bauhaus-University Weimar N2 - Performing parameter identification prior to numerical simulation is an essential task in geotechnical engineering. However, it has to be kept in mind that the accuracy of the obtained parameter is closely related to the chosen experimental setup, such as the number of sensors as well as their location. A well considered position of sensors can increase the quality of the measurement and to reduce the number of monitoring points. This Paper illustrates this concept by means of a loading device that is used to identify the stiffness and permeability of soft clays. With an initial setup of the measurement devices the pore water pressure and the vertical displacements are recorded and used to identify the afore mentioned parameters. Starting from these identified parameters, the optimal measurement setup is investigated with a method based on global sensitivity analysis. This method shows an optimal sensor location assuming three sensors for each measured quantity, and the results are discussed. KW - Angewandte Informatik KW - Angewandte Mathematik KW - Building Information Modeling KW - Computerunterstütztes Verfahren KW - Data, information and knowledge modeling in civil engineering; Function theoretic methods and PDE in engineering sciences; Mathematical methods for (robotics and) computer vision; Numerical modeling in engineering; Optimization in engineering applications Y1 - 2015 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:gbv:wim2-20170314-28008 SN - 1611-4086 ER - TY - CHAP A1 - Rodrigues, M. Manuela ED - Gürlebeck, Klaus ED - Lahmer, Tom T1 - OPERATIONAL PROPERTIES OF THE LAGUERRE TRANSFORM T2 - Digital Proceedings, International Conference on the Applications of Computer Science and Mathematics in Architecture and Civil Engineering : July 20 - 22 2015, Bauhaus-University Weimar N2 - The Laguerre polynomials appear naturally in many branches of pure and applied mathematics and mathematical physics. Debnath introduced the Laguerre transform and derived some of its properties. He also discussed the applications in study of heat conduction and to the oscillations of a very long and heavy chain with variable tension. An explicit boundedness for some class of Laguerre integral transforms will be present. KW - Angewandte Informatik KW - Angewandte Mathematik KW - Building Information Modeling KW - Computerunterstütztes Verfahren KW - Data, information and knowledge modeling in civil engineering; Function theoretic methods and PDE in engineering sciences; Mathematical methods for (robotics and) computer vision; Numerical modeling in engineering; Optimization in engineering applications Y1 - 2015 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:gbv:wim2-20170314-28186 SN - 1611-4086 ER - TY - CHAP A1 - Al-Yasiri, Zainab A1 - Gürlebeck, Klaus ED - Gürlebeck, Klaus ED - Lahmer, Tom T1 - ON BOUNDARY VALUE PROBLEMS FOR P-LAPLACE AND P-DIRAC EQUATIONS T2 - Digital Proceedings, International Conference on the Applications of Computer Science and Mathematics in Architecture and Civil Engineering : July 20 - 22 2015, Bauhaus-University Weimar N2 - The p-Laplace equation is a nonlinear generalization of the Laplace equation. This generalization is often used as a model problem for special types of nonlinearities. The p-Laplace equation can be seen as a bridge between very general nonlinear equations and the linear Laplace equation. The aim of this paper is to solve the p-Laplace equation for 2 < p < 3 and to find strong solutions. The idea is to apply a hypercomplex integral operator and spatial function theoretic methods to transform the p-Laplace equation into the p-Dirac equation. This equation will be solved iteratively by using a fixed point theorem. KW - Angewandte Informatik KW - Angewandte Mathematik KW - Building Information Modeling KW - Computerunterstütztes Verfahren KW - Data, information and knowledge modeling in civil engineering; Function theoretic methods and PDE in engineering sciences; Mathematical methods for (robotics and) computer vision; Numerical modeling in engineering; Optimization in engineering applications Y1 - 2015 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:gbv:wim2-20170314-27928 SN - 1611-4086 ER - TY - JOUR A1 - Artus, Mathias A1 - Koch, Christian T1 - Object-Oriented Damage Information Modeling Concepts and Implementation for Bridge Inspection JF - Journal of Computing in Civil Engineering N2 - Bridges are designed to last for more than 50 years and consume up to 50% of their life-cycle costs during their operation phase. Several inspections and assessment actions are executed during this period. Bridge and damage information must be gathered, digitized, and exchanged between different stakeholders. Currently, the inspection and assessment practices rely on paper-based data collection and exchange, which is time-consuming and error-prone, and leads to loss of information. Storing and exchanging damage and building information in a digital format may lower costs and errors during inspection and assessment and support future needs, for example, immediate simulations regarding performance assessment, automated maintenance planning, and mixed reality inspections. This study focused on the concept for modeling damage information to support bridge reviews and structural analysis. Starting from the definition of multiple use cases and related requirements, the data model for damage information is defined independently from the subsequent implementation. In the next step, the implementation via an established standard is explained. Functional tests aim to identify problems in the concept and implementation. To show the capability of the final model, two example use cases are illustrated: the inspection review of the entire bridge and a finite-element analysis of a single component. Main results are the definition of necessary damage data, an object-oriented damage model, which supports multiple use cases, and the implementation of the model in a standard. Furthermore, the tests have shown that the standard is suitable to deliver damage information; however, several software programs lack proper implementation of the standard. KW - Building Information Modeling KW - Brücke KW - Inspektion KW - Produktdaten KW - Objektorientierung KW - Building Information Modeling KW - Bridge KW - Inspection KW - Damage Information Modeling KW - Damage Y1 - 2022 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:gbv:wim2-20220826-47087 UR - https://ascelibrary.org/doi/10.1061/%28ASCE%29CP.1943-5487.0001030 VL - 2022 IS - Volume 36, issue 6 SP - 1 EP - 21 ER - TY - THES A1 - Wills, Nadine T1 - Modell bedarfsorientierter Leistungserbringung im FM auf Grundlage von Sensortechnologien und BIM N2 - Während der Digitalisierung im Bauwesen insbesondere im Bereich der Planungs- und Errichtungsphase von Bauwerken immer größere Aufmerksamkeit zuteilwird, ist das digitale Potenzial im Facility Management weit weniger ausgeschöpft, als dies möglich wäre. Vor dem Hintergrund, dass die Bewirtschaftung von Gebäuden jedoch einen wesentlichen Kostenanteil im Lebenszyklus darstellt, ist eine Fokussierung auf digitale Prozesse im Gebäudebetrieb erforderlich. Im Facility Management werden Dienstleistungen häufig verrichtungsorientiert, d. h. nach statischen Intervallen, oder bedarfsorientiert erbracht. Beide Arten der Leistungserbringung weisen Defizite auf, beispielweise weil Tätigkeiten auf Basis definierter Intervalle erbracht werden, ohne dass eine Notwendigkeit besteht oder weil bestehende Bedarfe mangels Möglichkeiten der Bedarfsermittlung nicht identifiziert werden. Speziell die Definition und Ermittlung eines Bedarfs zur Leistungserbringung ist häufig subjektiv geprägt. Auch sind Dienstleister oft nicht in frühen Phasen der Gebäudeplanung involviert und erhalten für ihre Dienstleistungen notwendige Daten und Informationen erst kurz vor Inbetriebnahme des zu betreibenden Gebäudes. Aktuelle Ansätze des Building Information Modeling (BIM) und die zunehmende Verfügbarkeit von Sensortechnologien in Gebäuden bieten Chancen, die o. g. Defizite zu beheben. In der vorliegenden Arbeit werden deshalb Datenmodelle und Methoden entwickelt, die mithilfe von BIM-basierten Datenbankstrukturen sowie Auswertungs- und Entscheidungsmethodiken Dienstleistungen der Gebäudebewirtschaftung objektiviert und automatisiert auslösen können. Der Fokus der Arbeit liegt dabei auf dem Facility Service der Reinigungs- und Pflegedienste des infrastrukturellen Facility Managements. Eine umfangreiche Recherche etablierter Normen und Standards sowie öffentlich zugänglicher Leistungsausschreibungen bilden die Grundlage der Definition erforderlicher Informationen zur Leistungserbringung. Die identifizierten statischen Gebäude- und Prozessinformationen werden in einem relationalen Datenbankmodell strukturiert, das nach einer Darstellung von Messgrößen und der Beschreibung des Vorgehens zur Auswahl geeigneter Sensoren für die Erfassung von Bedarfen, um Sensorinformationen erweitert wird. Um Messwerte verschiedener und bereits in Gebäuden existenten Sensoren für die Leistungsauslösung verwenden zu können, erfolgt die Implementierung einer Normierungsmethodik in das Datenbankmodell. Auf diese Weise kann der Bedarf zur Leistungserbringung ausgehend von Grenzwerten ermitteln werden. Auch sind Verknüpfungsmethoden zur Kombination verschiedener Anwendungen in dem Datenbankmodell integriert. Zusätzlich zur direkten Auslösung erforderlicher Aktivitäten ermöglicht das entwickelte Modell eine opportune Auslösung von Leistungen, d. h. eine Leistungserbringung vor dem eigentlich bestehenden Bedarf. Auf diese Weise können tätigkeitsähnliche oder räumlich nah beieinander liegende Tätigkeiten sinnvoll vorzeitig erbracht werden, um für den Dienstleister eine Wegstreckeneinsparung zu ermöglichen. Die Arbeit beschreibt zudem die für die Auswertung, Entscheidungsfindung und Auftragsüberwachung benötigen Algorithmen. Die Validierung des entwickelten Modells bedarfsorientierter Leistungserbringung erfolgt in einer relationalen Datenbank und zeigt simulativ für unterschiedliche Szenarien des Gebäudebetriebs, dass Bedarfsermittlungen auf Grundlage von Sensortechnologien erfolgen und Leistungen opportun ausgelöst, beauftragt und dokumentiert werden können. T3 - Schriften der Professur Baubetrieb und Bauverfahren - 42 KW - Facility-Management KW - Building Information Modeling KW - Datenmodell KW - Sensor KW - Bedarfsermittlung KW - Sensortechnologien KW - Facility Management KW - FM-Leistungserbringung Y1 - 2023 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:gbv:wim2-20230214-49248 PB - Eigenverlag der Professur Baubetrieb und Bauverfahren CY - Weimar ER - TY - THES A1 - Berhe, Asgedom Haile T1 - Mitigating Risks of Corruption in Construction: A theoretical rationale for BIM adoption in Ethiopia N2 - This PhD thesis sets out to investigate the potentials of Building Information Modeling (BIM) to mitigate risks of corruption in the Ethiopian public construction sector. The wide-ranging capabilities and promises of BIM have led to the strong perception among researchers and practitioners that it is an indispensable technology. Consequently, it has become the frequent subject of science and research. Meanwhile, many countries, especially the developed ones, have committed themselves to applying the technology extensively. Increasing productivity is the most common and frequently cited reason for that. However, both technology developers and adopters are oblivious to the potentials of BIM in addressing critical challenges in the construction sector, such as corruption. This particularly would be significant in developing countries like Ethiopia, where its problems and effects are acute. Studies reveal that bribery and corruption have long pervaded the construction industry worldwide. The complex and fragmented nature of the sector provides an environment for corruption. The Ethiopian construction sector is not immune from this epidemic reality. In fact, it is regarded as one of the most vulnerable sectors owing to varying socio-economic and political factors. Since 2015, Ethiopia has started adopting BIM, yet without clear goals and strategies. As a result, the potential of BIM for combating concrete problems of the sector remains untapped. To this end, this dissertation does pioneering work by showing how collaboration and coordination features of the technology contribute to minimizing the opportunities for corruption. Tracing loopholes, otherwise, would remain complex and ineffective in the traditional documentation processes. Proceeding from this anticipation, this thesis brings up two primary questions: what are areas and risks of corruption in case of the Ethiopian public construction projects; and how could BIM be leveraged to mitigate these risks? To tackle these and other secondary questions, the research employs a mixed-method approach. The selected main research strategies are Survey, Grounded Theory (GT) and Archival Study. First, the author disseminates an online questionnaire among Ethiopian construction engineering professionals to pinpoint areas of vulnerability to corruption. 155 responses are compiled and scrutinized quantitatively. Then, a semi-structured in-depth interview is conducted with 20 senior professionals, primarily to comprehend opportunities for and risks of corruption in those identified highly vulnerable project stages and decision points. At the same time, open interviews (consultations) are held with 14 informants to be aware of state of the construction documentation, BIM and loopholes for corruption in the country. Consequently, these qualitative data are analyzed utilizing the principles of GT, heat/risk mapping and Social Network Analysis (SNA). The risk mapping assists the researcher in the course of prioritizing corruption risks; whilst through SNA, methodically, it is feasible to identify key actors/stakeholders in the corruption venture. Based on the generated research data, the author constructs a [substantive] grounded theory around the elements of corruption in the Ethiopian public construction sector. This theory, later, guides the subsequent strategic proposition of BIM. Finally, 85 public construction related cases are also analyzed systematically to substantiate and confirm previous findings. By ways of these multiple research endeavors that is based, first and foremost, on the triangulation of qualitative and quantitative data analysis, the author conveys a number of key findings. First, estimations, tender document preparation and evaluation, construction material as well as quality control and additional work orders are found to be the most vulnerable stages in the design, tendering and construction phases respectively. Second, middle management personnel of contractors and clients, aided by brokers, play most critical roles in corrupt transactions within the prevalent corruption network. Third, grand corruption persists in the sector, attributed to the fact that top management and higher officials entertain their overriding power, supported by the lack of project audits and accountability. Contrarily, individuals at operation level utilize intentional and unintentional 'errors’ as an opportunity for corruption. In light of these findings, two conceptual BIM-based risk mitigation strategies are prescribed: active and passive automation of project audits; and the monitoring of project information throughout projects’ value chain. These propositions are made in reliance on BIM’s present dimensional capabilities and the promises of Integrated Project Delivery (IPD). Moreover, BIM’s synchronous potentials with other technologies such as Information and Communication Technology (ICT), and Radio Frequency technologies are topics which received a treatment. All these arguments form the basis for the main thesis of this dissertation, that BIM is able to mitigate corruption risks in the Ethiopian public construction sector. The discourse on the skepticisms about BIM that would stem from the complex nature of corruption and strategic as well as technological limitations of BIM is also illuminated and complemented by this work. Thus, the thesis uncovers possible research gaps and lays the foundation for further studies. KW - Building Information Modeling KW - Korruption KW - Risikomanagement KW - Äthiopien KW - Corruption KW - BIM KW - Risk management KW - Construction KW - Ethiopia Y1 - 2021 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:gbv:wim2-20211007-45175 ER - TY - JOUR A1 - Masood, R. A1 - Kharal, M. K. N. A1 - Nasir, A.R. T1 - Is BIM Adoption Advantageous for Construction Industry of Pakistan? JF - Procedia Engineering N2 - Lack of Information technology applications on construction projects lead to complex flow of data during project life cycle. Building Information Modeling (BIM) has gained attention in the Architectural, Engineering and Construction (AEC) industry, envisage the use of virtual n-dimensional (n-D) models to identify potential conflicts in design, construction or operational of any facility. A questionnaire has been designed to investigate perceptions regarding BIM advantages. Around 102 valid responses received from diversified stakeholders. Results showed very low BIM adoption with low level of ‘Buzz’. BIM is a faster and more effective method for designing and construction management, it improves quality of the design and construction and reduces rework during construction; which came out as the top thee advantages according to the perception of AEC professionals of Pakistan.BIM has least impact on reduction of cost, time and human resources. This research is a bench mark study to understand adoption and advantageous of BIM in Pakistan Construction Industry. KW - Building Information Modeling KW - Bauindustrie KW - Pakistan KW - BIM, BIM Adoption, BIM Advantages , Construction Industry, Pakistan Y1 - 2014 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:gbv:wim2-20170425-31509 SP - 229 EP - 238 ER - TY - CHAP ED - Gürlebeck, Klaus ED - Lahmer, Tom T1 - International Conference on the Applications of Computer Science and Mathematics in Architecture and Civil Engineering : July 20 - 22 2015, Bauhaus-University Weimar T1 - Internationales Kolloquium über Anwendungen der Informatik und Mathematik in Architektur und Bauwesen : 20. bis 22.7. 2015, Bauhaus-Universität Weimar T2 - Digital Proceedings, International Conference on the Applications of Computer Science and Mathematics in Architecture and Civil Engineering : July 20 - 22 2015, Bauhaus-University Weimar N2 - The 20th International Conference on the Applications of Computer Science and Mathematics in Architecture and Civil Engineering will be held at the Bauhaus University Weimar from 20th till 22nd July 2015. Architects, computer scientists, mathematicians, and engineers from all over the world will meet in Weimar for an interdisciplinary exchange of experiences, to report on their results in research, development and practice and to discuss. The conference covers a broad range of research areas: numerical analysis, function theoretic methods, partial differential equations, continuum mechanics, engineering applications, coupled problems, computer sciences, and related topics. Several plenary lectures in aforementioned areas will take place during the conference. We invite architects, engineers, designers, computer scientists, mathematicians, planners, project managers, and software developers from business, science and research to participate in the conference! KW - Angewandte Informatik KW - Angewandte Mathematik KW - Computerunterstütztes Verfahren KW - Building Information Modeling KW - Optimization in engineering applications KW - Data, information and knowledge modeling in civil engineering KW - Function theoretic methods and PDE in engineering sciences KW - Mathematical methods for (robotics and) computer vision KW - Numerical modeling in engineering Y1 - 2015 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:gbv:wim2-20150828-24515 SN - 1611-4086 ER - TY - CHAP A1 - Smarsly, Kay A1 - Tauscher, Eike ED - Gürlebeck, Klaus ED - Lahmer, Tom T1 - IFC-BASED MONITORING INFORMATION MODELING FOR DATA MANAGEMENT IN STRUCTURAL HEALTH MONITORING T2 - Digital Proceedings, International Conference on the Applications of Computer Science and Mathematics in Architecture and Civil Engineering : July 20 - 22 2015, Bauhaus-University Weimar N2 - This conceptual paper discusses opportunities and challenges towards the digital representation of structural health monitoring systems using the Industry Foundation Classes (IFC) standard. State-of-the-art sensor nodes, collecting structural and environmental data from civil infrastructure systems, are capable of processing and analyzing the data sets directly on-board the nodes. Structural health monitoring (SHM) based on sensor nodes that possess so called “on-chip intelligence” is, in this study, referred to as “intelligent SHM”, and the infrastructure system being equipped with an intelligent SHM system is referred to as “intelligent infrastructure”. Although intelligent SHM will continue to grow, it is not possible, on a well-defined formalism, to digitally represent information about sensors, about the overall SHM system, and about the monitoring strategies being implemented (“monitoring-related information”). Based on a review of available SHM regulations and guidelines as well as existing sensor models and sensor modeling languages, this conceptual paper investigates how to digitally represent monitoring-related information in a semantic model. With the Industry Foundation Classes, there exists an open standard for the digital representation of building information; however, it is not possible to represent monitoring-related information using the IFC object model. This paper proposes a conceptual approach for extending the current IFC object model in order to include monitoring-related information. Taking civil infrastructure systems as an illustrative example, it becomes possible to adequately represent, process, and exchange monitoring-related information throughout the whole life cycle of civil infrastructure systems, which is referred to as monitoring information modeling (MIM). However, since this paper is conceptual, additional research efforts are required to further investigate, implement, and validate the proposed concepts and methods. KW - Angewandte Informatik KW - Angewandte Mathematik KW - Building Information Modeling KW - Computerunterstütztes Verfahren KW - Data, information and knowledge modeling in civil engineering; Function theoretic methods and PDE in engineering sciences; Mathematical methods for (robotics and) computer vision; Numerical modeling in engineering; Optimization in engineering applications Y1 - 2015 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:gbv:wim2-20170314-28237 SN - 1611-4086 ER - TY - CHAP A1 - Kraußhar, Rolf Sören A1 - de Almeida, Regina ED - Gürlebeck, Klaus ED - Lahmer, Tom T1 - FUNDAMENTALS OF A WIMAN VALIRON THEORY FOR POLYMONOGENIC FUNCTIONS T2 - Digital Proceedings, International Conference on the Applications of Computer Science and Mathematics in Architecture and Civil Engineering : July 20 - 22 2015, Bauhaus-University Weimar N2 - In this paper we present some rudiments of a generalized Wiman-Valiron theory in the context of polymonogenic functions. In particular, we analyze the relations between different notions of growth orders and the Taylor coefficients. Our main intention is to look for generalizations of the Lindel¨of-Pringsheim theorem. In contrast to the classical holomorphic and the monogenic setting we only obtain inequality relations in the polymonogenic setting. This is due to the fact that the Almansi-Fischer decomposition of a polymonogenic function consists of different monogenic component functions where each of them can have a totally different kind of asymptotic growth behavior. KW - Angewandte Informatik KW - Angewandte Mathematik KW - Building Information Modeling KW - Computerunterstütztes Verfahren KW - Data, information and knowledge modeling in civil engineering; Function theoretic methods and PDE in engineering sciences; Mathematical methods for (robotics and) computer vision; Numerical modeling in engineering; Optimization in engineering applications Y1 - 2015 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:gbv:wim2-20170314-28100 SN - 1611-4086 ER - TY - CHAP A1 - Rodehorst, Volker ED - Gürlebeck, Klaus ED - Lahmer, Tom T1 - EVALUATION OF THE METRIC TRIFOCAL TENSOR FOR RELATIVE THREE-VIEW ORIENTATION T2 - Digital Proceedings, International Conference on the Applications of Computer Science and Mathematics in Architecture and Civil Engineering : July 20 - 22 2015, Bauhaus-University Weimar N2 - In photogrammetry and computer vision the trifocal tensor is used to describe the geometric relation between projections of points in three views. In this paper we analyze the stability and accuracy of the metric trifocal tensor for calibrated cameras. Since a minimal parameterization of the metric trifocal tensor is challenging, the additional constraints of the interior orientation are applied to the well-known projective 6-point and 7-point algorithms for three images. The experimental results show that the linear 7-point algorithm fails for some noise-free degenerated cases, whereas the minimal 6-point algorithm seems to be competitive even with realistic noise. KW - Angewandte Informatik KW - Angewandte Mathematik KW - Building Information Modeling KW - Computerunterstütztes Verfahren KW - Data, information and knowledge modeling in civil engineering; Function theoretic methods and PDE in engineering sciences; Mathematical methods for (robotics and) computer vision; Numerical modeling in engineering; Optimization in engineering applications Y1 - 2015 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:gbv:wim2-20170314-28178 SN - 1611-4086 ER - TY - THES A1 - Weise, Franziska T1 - Erfolgskritische Faktoren in exemplarischen Building Information Modeling Anwendungsfällen: Eine Analyse unter der Beachtung schleppender Digitalisierung und organisationaler Veränderungen N2 - Die fortschreitende Digitalisierung lässt innovative bauprojekt- und unternehmensinterne Workflows sowie Organisationssysteme entstehen. In diesem Zusammenhang ist die digitale Fortentwicklung durch Building Information Modeling [BIM] als Veränderungsprozess zu definieren, der Organisationsstrukturen nachhaltig umformen wird. BIM ist die führende digitale Arbeitsmethodik im Bauwesen, die entwurfs-, ausführungs- und bauprojektbezogenen Belangen gerecht werden kann. Die deutsche Bauwirtschaft ist im Vergleich zu anderen Branchen jedoch als digital rückständig zu betrachten. Sie ist durch einen Markt gekennzeichnet, an dem kleine und mittelständische Unternehmen [KMU] in hoher Zahl vertreten sind. Aufgrund von Anwendungsunkenntnis der kleinen und mittelständischen Unternehmen fehlt der flächendeckende und durchgängige BIM-Einsatz in Projekten. Mit dem Fokus auf dem Bauprojekt als temporärer Organisation adressiert der vorliegende Forschungsschwerpunkt die Schaffung eines realistischen Abbilds erprobter BIM-Anwendungsfälle in Modellprojekten. Herausgearbeitet werden derzeit bestehende BIM-Herausforderungen für Erstanwender, die die durchgängige BIM-Anwendung in Deutschland bisher hemmen. Die Forschungsarbeit fokussiert sich auf die Evaluation erfolgskritischer Faktoren [ekF] in BIM-Anwendungsfällen [AWF] im Rahmen einer qualitativen Inhaltsanalyse. Die digitale Transformation birgt strukturrelevante Veränderungsdeterminanten für Organisationen durch die BIM-Anwendung und außerdem Herausforderungen, die in der Anwendungsfallforschung betrachtet werden. Die Zielstellung ist dreiteilig. Ein entwickeltes BIM-Strukturmodell erfasst die aktuelle Richtlinienarbeit sowie Standardisierung und stellt dadurch den Rahmen notwendiger BIM-Strukturen im Bauprojekt auf. Aus dem Strukturmodell ist ein Modell zur Prüfung von Anwendungsfallrisiken abgeleitet worden. Dieses wird auf gezielt recherchierte BIM-Modellprojekte in Deutschland angewendet, um aus den erfolgskritischen Faktoren der darin praktizierten BIM-Anwendungsfälle eine ekF-Risikomatrix abzuleiten. Daraus geht ein unterstützendes BIM-Anwendungsinstrument in Form von BPMN-Abläufen für KMU hervor. Resultierend aus der Verbindung des BIM-Strukturmodels und der Anwendungsfallanalyse wird in den einzelnen Ablaufübersichten eine Risikoverortung je Anwendungsfall kenntlich gemacht. Unternehmen ohne BIM-Anwendungsexpertise in Bauprojektorganisationen erhalten auf diese Weise einen instrumentellen und niederschwelligen Zugang zu BIM, um die kollaborativen und wirtschaftlichen Vorteile der digitalen Arbeitsmethodik nutzen zu können. T3 - Schriften der Professur Baubetrieb und Bauverfahren - 41 KW - Building Information Modeling KW - Gebäudedaten-Modellierung KW - digitale Organisation Y1 - 2023 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:gbv:wim2-20230302-49281 PB - Eigenverlag der Professur Baubetrieb und Bauverfahren CY - Weimar ER - TY - THES A1 - Walther, Tino T1 - Ein Modell zur Optimierung der Bauleistungsfeststellung von Linienbaustellen N2 - Das Wissen um den realen Zustand eines Bauprojektes stellt eine entscheidende Kernkompetenz eines steuernden bauausführenden Unternehmens dar. Der bewusste Umgang mit Informationen und deren effiziente Nutzung sind entscheidende Erfolgsfaktoren für die zeit-, kosten- und qualitätsgerechte Realisierung von Bauprojekten. Obwohl die erforderlichen Erfolgsfaktoren bekannt sind, sind Kosten- und Terminüberschreitungen von Bauprojekten keine Seltenheit – eher das Gegenteil ist der Fall. Zukunftsweisende Digitalisierungsprojekte aber geben Anlass zu Hoffnung. Ein Beispiel ist der bereits im Dezember 2015 vom Bundesministerium für Verkehr und digitale Infrastruktur ins Leben gerufene Stufenplan Digitales Planen und Bauen. Dieser hat die Aufgabe flächendeckend die Methodik des Building Information Modeling (BIM) im Infrastrukturbereich einzuführen und somit die Digitalisierung in Deutschland zukunftsweisend voranzutreiben, indem erfolgreiche Bauprojekte mit durchgängigen Informationsflüssen arbeiten. Seither existiert eine Vielzahl an Digitalisierungsprojekten, alle mit gleichen Zielen. Nachweislich lassen sich hinsichtlich dessen allerdings auch vermehrt Defizite aufzeigen. So ist der Fortschritt sehr heterogen verteilt und lässt sich für die Branche nicht allgemeingültig festlegen. Mit einer internationalen Literaturrecherche sowie einer empirischen Studie als Untersuchungsmethode wurde in Form von Interviews mit Fachkundigen der tatsächliche Zustand der Digitalisierungs- und der BIM-Anwendungen im Straßenbau für den Controllingprozess der Bauleistungsfeststellung untersucht. Die erhobenen Daten wurden aufbereitet und anschließend softwaregestützt einer inhaltlichen Analyse unterzogen. In Kombination mit den Ergebnissen der Literaturrecherche wurden notwendige Anforderungen für den Controllingprozess der Bauleistungsfeststellung erhoben. Auf dieser Grundlage wurde ein Modell im Sinne der Systemtheorie zur Optimierung der Bauleistungsfeststellung entwickelt. Gegenstand der vorliegenden Arbeit ist die Integration der modellbasierten Arbeitsweise in die Prozesse der Bauleistungsfeststellung eines Bauunternehmens. Grundlage ist die objektive Auswertung des Fertigstellungsgrades (Baufortschrittes) mittels Luftbildaufnahmen. Deren Auswertung auf Basis eines Algorithmus und die systematische Identifikation des Baufortschrittes integriert in den Prozess der Bauleistungsfeststellung werden zu einem neu entwickelten Gesamtsystem mit dem Ergebnis eines optimierten Modells. Das entwickelte Modell wurde hinsichtlich Anwendbarkeit und praktischer Relevanz an ausgewählten Beispielszenarien untersucht und nachgewiesen. N2 - The knowledge of the real-time condition of a construction project represents a decisive core competence of a controlling construction company. The conscious handling and efficient use of information can contribute to and be decisive success factors for the timely, cost-efficient, and high-quality realization of construction projects. Despite the knowledge of the necessary success factors, cost and schedule overruns of construction projects are not uncommon, rather the opposite. Hope is shown by forward- looking digitalization projects. The implementation plan for digital planning and construction launched in December 2015 by the Federal Ministry of Transport and Digital Infrastructure. Its task is to introduce the Building Information Modelling (BIM) methodology across the board and to drive forward digitization in the entire construction industry and generate successful construction projects with a continuous flow of information. Since then, there have been numerous digitization projects, all with the same goal. However, it has been proven that there are also increasing deficits. For example, progress is very heterogeneously distributed, and it is not possible to make a general statement for the industry. Based on an international literature investigation and an empirical study as the underlying research method, the actual state of digitalization and BIM applications in road construction for the controlling process of construction performance assessment was examined in the form of qualitative interviews with professionals. The collected data was processed and then subjected to a software-based content analysis. Furthermore, a model was developed in the sense of the system theory for optimizing the construction performance assessment based on the previous research. The integration of the model-based determination of the construction performance of a construction company is the subject of this dissertation. The basis is the objective evaluation of the degree of completion (construction progress) by means of aerial photographs. The model- and algorithm-based evaluation of the construction progress combined with the systematic integration in the process of the construction performance assessment becomes a newly developed overall system with the result of an optimized model. The developed model was examined and proven regarding applicability and practical relevance in selected example scenarios. T3 - Schriften der Professur Baubetrieb und Bauverfahren - 43 KW - Building Information Modeling KW - Building Information Modeling KW - Bauleistungsfeststellung KW - Leistungsmeldung KW - Controlling KW - Baubetrieb Y1 - 2023 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:gbv:wim2-20230210-49115 PB - Eigenverlag der Professur Baubetrieb und Bauverfahren CY - Weimar ER - TY - CHAP A1 - Ferreira, Milton dos Santos A1 - Vieira, Nelson ED - Gürlebeck, Klaus ED - Lahmer, Tom T1 - EIGENFUNCTIONS AND FUNDAMENTAL SOLUTIONS FOR THE FRACTIONAL LAPLACIAN IN 3 DIMENSIONS T2 - Digital Proceedings, International Conference on the Applications of Computer Science and Mathematics in Architecture and Civil Engineering : July 20 - 22 2015, Bauhaus-University Weimar N2 - 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. KW - Angewandte Informatik KW - Angewandte Mathematik KW - Building Information Modeling KW - Computerunterstütztes Verfahren KW - Data, information and knowledge modeling in civil engineering; Function theoretic methods and PDE in engineering sciences; Mathematical methods for (robotics and) computer vision; Numerical modeling in engineering; Optimization in engineering applications Y1 - 2015 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:gbv:wim2-20170314-27968 SN - 1611-4086 ER - TY - CHAP A1 - Jahr, Katrin A1 - Schlich, Robert A1 - Dragos, Kosmas A1 - Smarsly, Kay ED - Gürlebeck, Klaus ED - Lahmer, Tom T1 - DECENTRALIZED AUTONOMOUS FAULT DETECTION IN WIRELESS STRUCTURAL HEALTH MONITORING SYSTEMS USING STRUCTURAL RESPONSE DATA T2 - Digital Proceedings, International Conference on the Applications of Computer Science and Mathematics in Architecture and Civil Engineering : July 20 - 22 2015, Bauhaus-University Weimar N2 - 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. KW - Angewandte Informatik KW - Angewandte Mathematik KW - Building Information Modeling KW - Computerunterstütztes Verfahren KW - Data, information and knowledge modeling in civil engineering; Function theoretic methods and PDE in engineering sciences; Mathematical methods for (robotics and) computer vision; Numerical modeling in engineering; Optimization in engineering applications Y1 - 2015 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:gbv:wim2-20170314-28031 SN - 1611-4086 ER - TY - JOUR A1 - Bargstädt, Hans-Joachim T1 - Challenges of BIM for Construction Site Operations JF - Procedia Engineering N2 - 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 KW - Building Information Modeling KW - Baustelle KW - BIM; Building Information Modeling; site management; construction site. Y1 - 2015 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:gbv:wim2-20170413-31218 SP - 52 EP - 59 ER -