In order to study the collapse mechanism of the stain-less steel umbrella structure under actual fire scenarios,this paper establishes and validates a finite element analysis model based on the fire test of a stainless steel umbrella structure with a scaled-down size of 1:4.The thermal-structural coupling analysis method is then employed to research the fire-resistant perfor-mance of the structure under different fire scenarios.The results demonstrate that the relocation of the fire source has a consider-able impact on the fire resistance performance of the umbrella structure.When the fire source is at the same horizontal height,the fire that occurs under the secondary strut with a small cross-sectional area will cause the entire structure to collapse and suffer damage,whereas when the fire source is located under the pri-mary strut,it will only cause localised damage to the structure in the area under fire,with the remaining structure retaining a cer-tain load-bearing capacity.
关键词
不锈钢/伞状结构/温度场模拟/热-结构耦合分析/连续倒塌
Key words
stainless steel/umbrella structure/temperature field simulation/thermal-structural coupling analysis/continuous col-lapse
维普
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