Geometric optimization of building information models in MEP projects: Algorithms and techniques for improving storage, transmission and display

Hu, Zhen-Zhong; Yuan, Shuang; Benghi, Claudio; Zhang, Jianping; Zhang, Xiaoyang; Li, Ding; Kassem, Mohamad

doi:10.1016/j.autcon.2019.102941

Cited by 14 publications

(6 citation statements)

References 23 publications

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“…Liu et al [51] presented a prototype of a lightweight and real-time Web3D visualization system for large-scale BIM scenes, striving to increase the data accessing rate and achieve be er data management. Hu et al [52] performed geometric optimization for BIM models in mechanical, electrical, and plumbing (MEP) projects by improving algorithms and techniques for storage, transmission, and display. Zhou et al [17] developed an online BIM visualization system, WebBIM, based on IFC and WebGL by rendering decompressed triangular BIM data.…”

Section: Bim Lightweight Visualization Methodsmentioning

confidence: 99%

Industry Foundation Class-Based Building Information Modeling Lightweight Visualization Method for Steel Structures

Sun,

Wang,

2024

Applied Sciences

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The efficient extraction, storage, and visualization of geometric and semantic information is a key foundation for the operation of the building information modeling (BIM) platform. This study aims to develop a lightweight BIM system and optimize the system’s performance according to the specific characteristics of steel structures. This study proposes several novel techniques for extracting and decoupling the geometric and semantic information of components from industry foundation class (IFC) files. A redundancy removal approach combining the principal content analysis (PCA) algorithm and the Hausdorff-based comparison algorithm is proposed to identify standardized steel components, and a lightweight visualization method on Web3D for redundant instances is also presented. A loading mechanism of the level of detail (LOD) model based on a mesh simplification algorithm is presented to optimize the display efficiency. The developed system is evaluated by three steel structural models. Using the redundancy removal approach, the number of instances is decreased by 96.46% in less than 30 s and over 30 FPS (frame per second) is kept when rendering. Using the LOD loading mechanism, 95.38% of vertices and 98.46% of patches are eliminated under 50 mm precision. The experiment results indicate that users can quickly load large BIM models and fetch sufficient information from the website.

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Section: Bim Lightweight Visualization Methodsmentioning

confidence: 99%

Industry Foundation Class-Based Building Information Modeling Lightweight Visualization Method for Steel Structures

Sun,

Wang,

2024

Applied Sciences

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“…In DDWSS design projects, BIM modelling tools generate a database with element, component and technical information in the form of either geometric (diameter, elevation, length, slope) or mechanical parameters (materials, roughness, flow rate, flow velocity, pressure). These elements can be modified as a project requires, allowing parameters to be modified in conformity with geometrical or model connections, which makes the modelling process more efficient and intuitive [33]. However, these tools lack the potential for customisation, and adaptation to local design guidelines can still be achieved through traditional approaches [27,34].…”

Section: Bim As a Ddwss Design Toolmentioning

confidence: 99%

Towards the Integration and Automation of the Design Process for Domestic Drinking-Water and Sewerage Systems with BIM

et al. 2022

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The use of building information modelling (BIM) in construction projects is expanding, and its usability throughout building lifecycles, from planning and construction to operation and maintenance, is gaining increasing proof. In the design of domestic drinking-water and sewerage systems (DDWSSs), BIM focuses on coordinating disciplines and their design. Despite studies promoting BIM environments for DDWSSs that take into account the regulatory frameworks of corresponding countries, these efforts do not include the use of parametric tools that enhance the efficiency of the design process. Therefore, engineers still use conventional 2D design, which requires many rounds of iteration, and manual work is also generally still used. In this research, we developed and validated an intuitive methodology for solving a specific DDWSS problem, using a design science research method (DSRM) as an applied science approach. This was addressed by developing an artefact and validating it through two case studies. The obtained solution combines BIM models and parametric tools to automate the manual activities of the traditional design method. This article aims to bring abstract BIM concepts into practice and encourage researchers and engineers to adopt BIM for DDWSSs.

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“…(3) Redundant: during the whole lifetime of each BIM or GIS project, no matter which schema version (IFC Schema Specification-buildingSMART Technical [23]; CityGML | OGC [24]) the model file complies with, data redundancy involving instance repetition and geometry complexity [25] is unintentionally generated, as depicted in Figure 3. Sometimes, it may even accumulate up to 60-70% in relatively large models [26].…”

Section: Defects Of Current Official Data Formats Of Ifc Andmentioning

confidence: 99%

A Novel HDF‐Based Data Compression and Integration Approach to Support BIM‐GIS Practical Applications

Pan

Shi

Jiang

2020

Advances in Civil Engineering

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Constructing a fully mapped virtual world is the premise of establishing the digital twin system; thus, the integration of BIM (Building Information Modeling) and GIS (Geographic Information System) constitutes a fundamental part of the mature digital twin. Although quite a few theoretical unified data models of BIM and GIS integration have been presented in precedent research, the practical web-based applications and software support for real-world city information modeling are still difficult to achieve. One of the challenges is storage inefficiency. It thence leads to burdens in exchange and analysis, which hugely impede the realization of virtual-real fusion. To address that issue, in this research, we contribute to exploring an HDF- (Hierarchical Data Format-) based, innovative, and synthesized scheme with three significant technical processes. First, data reorganization trims the original data with efficient redundancy elimination and reordering for IFC-SPF (IFC STEP Physical File) and XML-encoded CityGML (City Geography Markup Language). Next, bidirectional transformation methods for BIM and GIS modeling data, images, and analytical data into HDF are proposed. They retain the entities and relationships in modeling data and can further improve the compactness and accessibility by ultimately 60%–80% which saves 497,612 KB from 565,152 KB in the test of ZhongChun transformation substation. Finally, data aggregation enhances the bond of the integrated model and heterogeneous data resources from the transformed HDF files. The case studies show that the approach proposed in this paper could reach high efficiency for practicability of the BIM + GIS integration model. This light-weight integration method can further improve the front-end service responsiveness in digital twin applications.

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Geometric optimization of building information models in MEP projects: Algorithms and techniques for improving storage, transmission and display

Abstract: Ding and Kassem, Mohamad (2019) Geometric optimization of building information models in MEP projects: Algorithms and techniques for improving storage, transmission and display. Automation in Construction, 107. p. 102941.

Cited by 14 publications

References 23 publications

Industry Foundation Class-Based Building Information Modeling Lightweight Visualization Method for Steel Structures

Industry Foundation Class-Based Building Information Modeling Lightweight Visualization Method for Steel Structures

Towards the Integration and Automation of the Design Process for Domestic Drinking-Water and Sewerage Systems with BIM

A Novel HDF‐Based Data Compression and Integration Approach to Support BIM‐GIS Practical Applications

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