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为了分析火灾下多高层钢结构的破坏机理,考察多高层钢结构在火灾下的反应规律,基于ABAQUS建立了整体钢结构的火灾反应数值模型,对不同层数的钢结构以及相同结构不同火场位置的钢结构进行了数值模拟分析,计算了局部火灾条件下钢结构的变形与破坏过程,分析了钢结构在火灾和荷载共同作用下的破坏机理,探讨了局部火灾对整体结构的影响范围与因素,给出了钢结构在高度和荷载变化时的破坏规律并分析了引起这种破坏规律的原因。
In order to analyze the failure mechanism of multi-level steel structures under fire and investigate the response rules of multi-level steel structures under fire conditions, a numerical model of fire response of the whole steel structure was established based on ABAQUS. For different levels of steel structures and fire structures with the same structure , The deformation and failure process of steel structure under local fire conditions were calculated, the failure mechanism of steel structure under the combined action of fire and load was analyzed, and the influence range and factors of local fire on overall structure were discussed The failure rules of the steel structure under the height and load changes are given and the reasons causing the damage are analyzed.