China Safety Science Journal ›› 2021, Vol. 31 ›› Issue (8): 147-154.doi: 10.16265/j.cnki.issn1003-3033.2021.08.021

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IHFACS-BN safety assessment model for large-span steel structure construction and its application

HU Yunpin1, LI Chao1, LI Zongliang1, YANG Daohe2   

  1. 1 School of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan Hubei 430070, China;
    2 Wuhan Construction Safety Management Office, Wuhan Hubei 430015, China
  • Received:2021-05-17 Revised:2021-07-07 Online:2021-08-28 Published:2022-02-28

Abstract: In order to reduce construction accidents of long-span steel structures, a risk evaluation model for them based on IHFACS and BN was proposed. Firstly, HFACS method was introduced and improved based on engineering practice. Secondly, safety risks were comprehensively identified by using IHFACS, and an evaluation index system was constructed by adopting RS method. Then, according to field data and fuzzy set method, prior probability of each BN root node and conditional probability distribution between nodes were determined, the system's failure probability was calculated by GeNIe software, and key risk factors were analyzed. Finally, with Kunming airport expansion project as an example, the model's effectiveness and advantages were verified. The results show that its calculated outcomes are basically consistent with reality, and the overall safety risk probability of the project is 57.62%. It is also found that misalignment of welds, pores, slag inclusion and improper removal of supporting tire frames all feature a susceptibility above 20%, and they make the key risk factors in large-span steel structure construction.

Key words: Long-span steel structure, construction safety risk, improved human factor analysis and classification system (IHFACS), Bayesian network(BN), rough set(RS), fuzzy set

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