scholarly journals EXTENDED MAPTREE: A REPRESENTATION OF FINE-GRAINED TOPOLOGY AND SPATIAL HIERARCHY OF BIM

2017 ◽  
Vol XLII-2/W7 ◽  
pp. 409-415
Author(s):  
Y. Wu ◽  
J. Shang ◽  
X. Hu ◽  
Z. Zhou
Keyword(s):  
Spatial Information ◽  
Boundary Representation ◽  
Information Modeling ◽  
Solid Model ◽  
Spatial Queries ◽  
Fine Grained ◽  
Building Information ◽  
Combinatorial Maps ◽  
Spatial Hierarchy ◽  
Indoor Spaces

Spatial queries play significant roles in exchanging Building Information Modeling (BIM) data and integrating BIM with indoor spatial information. However, topological operators implemented for BIM spatial queries are limited to qualitative relations (e.g. touching, intersecting). To overcome this limitation, we propose an extended maptree model to represent the fine-grained topology and spatial hierarchy of indoor spaces. The model is based on a maptree which consists of combinatorial maps and an adjacency tree. Topological relations (e.g., adjacency, incidence, and covering) derived from BIM are represented explicitly and formally by extended maptrees, which can facilitate the spatial queries of BIM. To construct an extended maptree, we first use a solid model represented by vertical extrusion and boundary representation to generate the isolated 3-cells of combinatorial maps. Then, the spatial relationships defined in IFC are used to sew them together. Furthermore, the incremental edges of extended maptrees are labeled as removed 2-cells. Based on this, we can merge adjacent 3-cells according to the spatial hierarchy of IFC.

BIM-based draft schedule generation in reinforced concrete-framed buildings

2019 ◽  
Vol 19 (2) ◽  
pp. 280-294 ◽  
Author(s):  
Ziwei Wang ◽  
Ehsan Rezazadeh Azar
Keyword(s):  
Construction Projects ◽  
Spatial Information ◽  
Vital Role ◽  
Information Modeling ◽  
Project Work ◽  
Case Based Reasoning ◽  
Content Type ◽  
Building Information ◽  
Construction Knowledge ◽  
Information Materials

PurposeProject schedules have a vital role in the effective management of time, cost, scope and resources in construction projects, and creating schedules requires schedulers with construction knowledge and experience. The increase in the complexity of building projects and the emergence of building information modeling (BIM) in the architecture, engineering and construction industry have encouraged researchers to explore BIM capabilities for automated schedule generation. The scope and capabilities of the developed systems, however, are limited and the link between design and scheduling is still underdeveloped. This paper aims to investigate methods to develop a BIM-based framework to automatically generate schedules for concrete-framed buildings.Design/methodology/approachThis system first extracts the required data from the building information model, including elements’ dimensions, quantities, spatial information, materials and other related attributes. It then applies construction rules, prior knowledge and production rate data to create project work-packages, calculate their durations and determine their relationships. Finally, it organizes these results into a schedule using project management software.FindingsThis system provides an automated and easy-to-use approach to generate schedules for concrete-framed buildings that are modeled in a BIM platform. It provides two schedules for each project, both a sequential and an overlapped solution, which the schedulers can modify into a practical schedule based on conditions and available resources.Originality/valueThis research project presents an innovative approach to use BIM-based attributes of structural elements to develop list of work-packages and estimate their durations, and then it uses a combination of rule-based and case-based reasoning to generate the schedules.

Case Study of Three-Dimensional Optimization Design on Architectural MEP Based on BIM

2014 ◽  
Vol 507 ◽  
pp. 177-181
Author(s):  
Xiao Biao Lv ◽  
Zi Jian Liang
Keyword(s):  
Design Optimization ◽  
Optimization Design ◽  
Spatial Information ◽  
Three Dimensional ◽  
Integrated Design ◽  
Information Modeling ◽  
Pipeline Network ◽  
Building Information ◽  
Hospital Building

MEP (Mechanical,Electrical,Plumping) includes vast amount of equipment types and pipelines in the integrated design, leading the coordination of MEP design optimization a major challenge for complex buildings. This document explains the technical processes and characteristics of the three-dimensional MEP design optimization based on BIM(Building Information Modeling), connected with the case of the integrated pipeline optimization design practice of a hospital building. Though establishing the BIM model of four-space underground pipeline network system in a hospital outpatient building, we carried out MEP collision checking, obtaining three-dimensional spatial information 102 collision points. Combined with manual screening we finally identified 67 valid point of conflict, for the construction of secondary pipeline network optimization design. In particular, the suggestion on the promotion and application of BIM-based building MEP design to municipal pipeline network in the future is proposed.

scholarly journals INTEGRATION OF BUILDING INFORMATION MODELING AND AGENT-BASED MODELING FOR EVACUATION SIMULATION

2021 ◽  
Vol XLVI-4/W5-2021 ◽  
pp. 109-112
Author(s):  
C. Beyaz ◽  
E. D. Özgener ◽  
Y. G. Bağcı ◽  
Ö. Akın ◽  
H. Demirel
Keyword(s):  
Information Technologies ◽  
Information Science ◽  
Spatial Information ◽  
Emergency Evacuation ◽  
Indoor Navigation ◽  
Information Modeling ◽  
Accurate Information ◽  
Agent Based ◽  
Fire Evacuation ◽  
Building Information

Abstract. Building Information Modelling (BIM) is a highly advanced spatial modeling method that is fully incorporated in the building lifecycle. With the support of Information Technologies, the use of BIM has become common in building management such as energy efficiency, indoor navigation and emergency evacuation simulations. This study focuses on emergency evacuation simulations since, integrating BIM and Spatial Information Science, could mitigate casualties in emergencies. Traditional evacuation management methods are generally inadequate since they are based on 2D evacuation plans, they are static and do not consider the characteristics/interactions of the people in the building. This study aims to integrate BIM and Agent-Based Modelling (ABM) for emergency evacuation simulations, where characteristics of the building and the users are incorporated. Istanbul Technical University Faculty of Civil Engineering was selected as study area and the BIM model was created by using the CAD drawings of the floor plans. The users of the Faculty building such as students, academicians, administrative staff and visitors are considered for simulations. The BIM model was transferred to the ABM environment, and the routes used during the fire evacuation were generated. Fire evacuation simulations were performed, where agents having different characteristics evacuate the building according to the rules predefined. Three different scenarios were tested. Major conclusion of this study is that, via integrating BIM and ABM, it is possible to model people’s behavior within a three-dimensional digital environment, where decision-makers could be performing simulations such as fire evacuation supported by dynamic, realistic and accurate information.

scholarly journals A BIM Based Hybrid 3D Indoor Map Model for Indoor Positioning and Navigation

2020 ◽  
Vol 9 (12) ◽  
pp. 747
Author(s):  
Jianhua Liu ◽  
Jingyan Luo ◽  
Jiwei Hou ◽  
Danqi Wen ◽  
Guoqiang Feng ◽  
...  
Keyword(s):  
Emergency Response ◽  
Indoor Positioning ◽  
Location Based Services ◽  
Information Modeling ◽  
Data Organization ◽  
Navigation Systems ◽  
Indoor Location ◽  
Navigation Function ◽  
Building Information ◽  
Indoor Spaces

Accurate and fast indoor Location-Based Services (LBS) is very important for daily life and emergency response. Indoor map is the basis of indoor LBS. The model construction and data organization of indoor map are the key scientific problems that urgently need to be solved in the current indoor LBS application. In recent years, hybrid models have been used widely in the research of indoor map, because they can balance the limitations of single models. However, the current studies about hybrid model pay more attention to the model accuracy and modeling algorithm, while ignoring its relationship between positioning and navigation and its practicality in mobile indoor LBS applications. This paper addresses a new indoor map model, named Building Information Modeling based Positioning and Navigation (BIMPN), which is based on the entity model and the network model. The highlight of BIMPN is that it proposes a concept of Step Node (SN) to assist indoor positioning and navigation function. We developed the Mobile Indoor Positioning and Navigation System (MIPNS) to verify the practicability of BIMPN. Results indicate that the BIMPN can effectively organize the characteristics of indoor spaces and the building features, and assist indoor positioning and navigation. The BIMPN proposed in this paper can be used for the construction of indoor maps and it is suitable for mobile indoor positioning and navigation systems.

scholarly journals Extracting Indoor Space Information in Complex Building Environments

2018 ◽  
Vol 7 (8) ◽  
pp. 321 ◽  
Author(s):  
Yueyong Pang ◽  
Chi Zhang ◽  
Liangchen Zhou ◽  
Bingxian Lin ◽  
Guonian Lv
Keyword(s):  
Indoor Environment ◽  
Information Modeling ◽  
Indoor Environments ◽  
Indoor Space ◽  
Floor Space ◽  
Grid Model ◽  
Building Information ◽  
Complex Building ◽  
Space Boundary ◽  
Indoor Spaces

Indoor space information extraction is an important aspect of reconstruction for building information modeling and a necessary process for geographic information system from outdoor to indoor. Entity model extracting methods provide advantages in terms of accuracy for building indoor spaces, as compared with network and grid model methods, and the extraction results can be converted into a network or grid model. However, existing entity model extracting methods based on a search loop do not consider the complex indoor environment of a building, such as isolated columns and walls or cross-floor spaces. In this study, such complex indoor environments are analyzed in detail, and a new approach for extracting buildings’ indoor space information is proposed. This approach is based on indoor space boundary calculation, the Boolean difference for single-floor space extraction, relationship reconstruction, and cross-floor space extraction. The experimental results showed that the proposed method can accurately extract indoor space information from the complex indoor environment of a building with geometric, semantic, and relationship information. This study is theoretically important for better understanding the complexity of indoor space extraction and practically important for improving the modeling accuracy of buildings.

scholarly journals Automatically Processing IFC Clipping Representation for BIM and GIS Integration at the Process Level

2020 ◽  
Vol 10 (6) ◽  
pp. 2009 ◽  
Author(s):  
Junxiang Zhu ◽  
Peng Wu ◽  
Mengcheng Chen ◽  
Mi Jeong Kim ◽  
Xiangyu Wang ◽  
...  
Keyword(s):  
Boundary Representation ◽  
Information Modeling ◽  
Data Conversion ◽  
Main Challenge ◽  
Solid Models ◽  
Building Information ◽  
Potential Benefits ◽  
Building Components ◽  
Low Efficiency ◽  
Process Level

The integration of building information modeling (BIM) and geographic information system (GIS) is attracting more attention than ever due to its potential benefits for both the architecture, engineering, and construction (AEC) domain and the geospatial industry. The main challenge in BIM and GIS integrated application comes from the fundamental data conversion, especially for the geometric information. BIM and GIS use different modeling paradigms to represent objects. The BIM dataset takes, for example, Industry Foundation Classes (IFC) that use solid models, such as boundary representation (B-Rep), swept solid, constructive solid geometry (CSG), and clipping, while the GIS dataset mainly uses surface models or B-Rep. The fundamental data conversion between BIM and GIS is the foundation of BIM and GIS integrated application. However, the efficiency of data conversion has been greatly impaired by the human intervention needed, especially for the conversion of the clipping geometry. The goal of this study is to automate the conversion of IFC clipping representation into the shapefile format. A process-level approach was developed with an algorithm for instantiating unbounded half spaces using B-Rep. Four IFC models were used to validate the proposed method. The results show that (1) the proposed approach can successfully automate the conversion of IFC clipping representation into the shapefile format; and (2) increasing boundary size has no effect on the file size of unbounded half spaces, but slightly increases the producing time of half spaces and processing time of building components. The efficiency of this study can be further improved by using an open-source package, instead of using the low-efficiency packages provided by ArcGIS.

scholarly journals Identification of the Best 3D Viewpoint within the BIM Model: Application to Visual Tasks Related to Facility Management

Buildings ◽  
2019 ◽  
Vol 9 (7) ◽  
pp. 167
Author(s):  
Romain Neuville ◽  
Jacynthe Pouliot ◽  
Roland Billen
Keyword(s):  
Web Application ◽  
Spatial Information ◽  
3D Visualization ◽  
Facility Management ◽  
Information Modeling ◽  
Online Questionnaire ◽  
Management Algorithm ◽  
Building Information ◽  
Visual Tasks ◽  
Visualization Techniques

Visualizing building assets within building information modeling (BIM) offers significant opportunities in facility management as it can assist the maintenance and the safety of buildings. Nevertheless, taking decisions based on 3D visualization remains a challenge since the high density of spatial information inside the 3D model requires suitable visualization techniques to achieve the visual task. The occlusion is ubiquitous and, whilst solutions already exist such as transparency, none currently solve this issue with an automatic and suitable management of the camera. In this paper, we propose the first RESTful web application implementing a 3D viewpoint management algorithm and we demonstrate its usability in the visualization of assets based on a BIM model for visual counting in facility management. Via an online questionnaire, empirical tests are conducted with architects, the construction industry, engineers, and surveyors. The results show that a 3D viewpoint that maximizes the visibility of 3D geometric objects inside the viewport significantly improves the success rate, the accuracy, and the certainty of a visual counting task compared to the traditional four side points of view (i.e., from the front, back, left, and right viewpoints). Finally, this first validation lays the foundation of future investigations in the 3D viewpoint usability evaluation, both in terms of visual tasks and application domains.

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