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该文利用梁单元建立了型钢混凝土平面框架耐火性能分析的有限元计算模型,有限元模型得到了构件试验结果的验证。利用建立的有限元模型,对局部火灾下型钢混凝土平面框架的破坏机理和破坏形态进行了分析。研究表明:火灾下型钢混凝土平面框架出现了三种典型的破坏形态,即内柱破坏导致的框架破坏、边柱破坏导致的框架破坏以及混合破坏形态;火灾分布位置及破坏时梁内轴力是影响框架破坏形式的关键因素。
In this paper, the finite element model of fire resistance analysis of steel reinforced concrete plane frame is established by using beam elements, and the finite element model is verified by the test results. Using the finite element model established, the failure mechanism and failure mode of the flat steel frame under partial fire were analyzed. The results show that three kinds of typical failure modes are found in the plane frame of the fire-damaged SRC, that is, the frame failure caused by the inner column failure, the frame failure caused by the side column failure and the mixed failure mode. Key Factors Affecting the Destruction of Frameworks.