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The open data exchange standard Industry Foundation Classes (IFC) has been recently significantly extended to also cover infrastructure facilities such as roads and railways. The results of these activities form part of version 4.3 of the... more
The open data exchange standard Industry Foundation Classes (IFC) has been recently significantly extended to also cover infrastructure facilities such as roads and railways. The results of these activities form part of version 4.3 of the standard. Linear placement of objects is one of the most important concepts in infrastructure asset modelling. As such, Release Candidate 1 of IFC 4.3 has been critically analysed. In this paper, we address several issues that were identified together with the participants of the IFC Infrastructure Extension Deployment and IFC Rail Phase 2 projects. We present an improved model removing unnecessary doubling of concepts and reusing many already established entities. We showcase the new model on two example scenarios from one of the projects and determine better adherence with the IFC legacy. The proposed improvements have been adopted in Release Candidate 2 of the IFC 4.3. 1.2 Problem Statement It is clear that data models need to integrate the conc...
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Cultural heritage building information models (HBIMs) incorporate specific geometric and semantic data that are mandatory for supporting the workflows and decision making during a heritage study. The Industry Foundation Classes (IFC) open... more
Cultural heritage building information models (HBIMs) incorporate specific geometric and semantic data that are mandatory for supporting the workflows and decision making during a heritage study. The Industry Foundation Classes (IFC) open data exchange standard can be used to migrate these data between different software solutions as an openBIM approach, and has the potential to mitigate data loss. Specific data-exchange scenarios can be supported by firstly developing an Information Delivery Manual (IDM) and subsequently filtering portions of the IFC schema and producing a specialized Model View Definition (MVD). This paper showcases the creation of a specialized IDM for the heritage domain in consultation with experts in the restoration and preservation of built heritage. The IDM was then translated into a pilot MVD for heritage. We tested our developments on an HBIM case study, where a historic building was semantically enriched with information about the case study’s conservatio...
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Innovative solutions for rapid and intelligent survey and assessment methods are required in maintenance, repair, retrofit and rebuild of enormous numbers of bridges in service throughout the world. Motivated by this need, a... more
Innovative solutions for rapid and intelligent survey and assessment methods are required in maintenance, repair, retrofit and rebuild of enormous numbers of bridges in service throughout the world. Motivated by this need, a next-generation integrated bridge inspection system, called SeeBridge, has been proposed. An Information Delivery Manual (IDM) was compiled to specify the technical components, activities and information exchanges in the SeeBridge process, and a Model View Definition (MVD) was prepared to specify the data exchange schema to serve the IDM. The MVD was bound to the IFC4 Add2 data schema standard. The IDM and MVD support research and development of the system by rigorously defining the information and data that structure bridge engineers' knowledge. The SeeBridge process is mapped, parts of the data repositories are presented, and the future use of the IDM is discussed. The development underlines the real potential for automated inspection of infrastructure at ...
CESBP/ BauSIM 2016: CESBP Central European Symposium on Building Physics, Technische Universitat Dresden, Germany, 14-16 September 2016
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With the emergence of microelectromechanical systems smaller and cheaper inertial measurement units became available. These constitute the basis for affordable dead reckoning applications but exhibit characteristics leading to errors in... more
With the emergence of microelectromechanical systems smaller and cheaper inertial measurement units became available. These constitute the basis for affordable dead reckoning applications but exhibit characteristics leading to errors in the long term. Especially the error of the gyroscopes lead to heading drift resulting in enlarging positioning error with the distance walked. This paper outlines several approaches to improve and maintain the heading for pedestrian dead reckoning using sensor fusion, context specific information and justifiable human interaction.
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This paper presents our research towards the utilization of Building Information Modeling (BIM) methods in Railway Equipment Engineering. While BIM is already applied in several railway infrastructure construction projects, so far, it is... more
This paper presents our research towards the utilization of Building Information Modeling (BIM) methods in Railway Equipment Engineering. While BIM is already applied in several railway infrastructure construction projects, so far, it is mainly used for construction engineering tasks, i.e. for modeling the alignment, bridges or tunnels. The RIMcomb research project targets the further application in scope of rail engineering subsections such as control and safety systems, train control systems, telecommunication systems, electric power systems, rail power supply or cable management. In this paper, we are going to give a general overview of the project and will discuss first findings of our approach to digitizing conventional technical drawings in order to translate their content into a machine-readable form. representing railway equipment. The paper ends with a summary and an outlook. 2 THE RIMCOMB PROJECT The research project “RIMcomb: Railway Information Modeling for the Equipment...
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Recent demand for higher energy efficiency within the building sector has led to the use of Building Energy Performance Simulation (BEPS) tools. These powerful predictive tools enable investigation of environmental and energy performance... more
Recent demand for higher energy efficiency within the building sector has led to the use of Building Energy Performance Simulation (BEPS) tools. These powerful predictive tools enable investigation of environmental and energy performance for different design and retrofit design alternatives. However, integrating BEPS with Building Information Modelling (BIM) based building design tools still experiences limitations due to a lack of standardised methods of information exchange between these domains. As a result, this paper presents a Model View Definition (MVD) for advanced BEPS. In doing so this work enables a standardised exchange of data from BIM to BEPS tools, such as Modelica, using the Industry Foundation Classes (IFC) standard. The entire process becomes available through the open source software framework emerged from the IEA EBC Annex 60.
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Recent demand for higher energy efficiency within the building sector has led to the use of Building Energy Performance Simulation (BEPS) tools. These powerful predictive tools enable investigation of environmental and energy performance... more
Recent demand for higher energy efficiency within the building sector has led to the use of Building Energy Performance Simulation (BEPS) tools. These powerful predictive tools enable investigation of environmental and energy performance for different design and retrofit design alternatives. However, integrating BEPS with Building Information Modelling (BIM) based building design tools still experiences limitations due to a lack of standardised methods of information exchange between these domains. As a result, this paper presents a Model View Definition (MVD) for advanced BEPS. In doing so this work enables a standardised exchange of data from BIM to BEPS tools, such as Modelica, using the Industry Foundation Classes (IFC) standard. The entire process becomes available through the open source software framework emerged from the IEA EBC Annex 60.