Safety monitoring system of steel truss structures in fire. (September 2020)

• Record Type: Journal Article
• Authors: Jiang, Shouchao; Zhu, Shaojun; Guo, Xiaonong; Chen, Chen; Li, Zhiyuan
• Is Part Of: Journal of constructional steel research. Volume 172(2020)
• Publication Date: 2020-09
• Subjects: Steel truss structures -- Fire-induced collapse -- Monitoring system -- Experimental verification; Steel, Structural -- Periodicals; Building, Iron and steel -- Periodicals; Acier de construction -- Périodiques; Construction métallique -- Périodiques; 624.1821
• DOI: 10.1016/j.jcsr.2020.106216
• Languages: English
• ISSNs: 0143-974X

Abstract

Abstract: The fire-induced collapse of steel structures is very likely to cause secondary casualties in fire rescue. In order to predict the structural response, as well as give early warning of the collapse location of steel truss structures in fire to the rescue team, this paper develops a safety monitoring system for steel truss structures. Firstly, the theoretical basis of the system, including the member failure index and the collapse index is derived. Secondly, a numerical example is analyzed in SAP2000 to illustrate the calculation process of the collapse index, and the results indicate that the limit value of the collapse index can be chosen as 0.45. Subsequently, the development of the system, including the theoretical framework, the design of the system, and the user interface, is described. Finally, the system is used to monitor a fire test on a steel truss roof structure. The comparison of the output and experimental results indicated that the system is able to evaluate the real-time status of the members and the global structure. Besides, the structural response predicted by the system can be given to the user 180 s ahead of time, which provides precious information for the fire brigades to determine a safer route during the rescue process. Graphical abstract: Unlabelled Image Highlights: Member failure index in fire is proposed based on temperature. Collapse index for steel truss structures in fire is proposed. A safety monitoring system for steel truss structures in fire is developed. The system is tested to be helpful by a full-scale fire experiment.