火灾高温下轴心受压型钢混凝土柱的应力分析

The stress analysis of axial compression steel reinforced concrete column under high-temperature fire

利用通用有限元分析程序ANSYS10.0对轴心受压型钢混凝土柱(ACSRCC)在火灾高温下截面应力分布进行了数值模拟分析,获得了ACSRCC截面的应力场分布,并对2种结果进行了对比。基于不同材料应力的转换原理和叠加原理,提出了火灾高温下ACSRCC截面应力的数值计算方法,计算结果与模拟分析结果大致吻合。最后研究了型钢保护层厚度等因素对火灾高温下ACSRCC力学性能的影响规律。

Based on the fact that building material＇s strength degeneration rule in domestic and overseas are different under the high-temperature fire,with finite element analysis program ANSYS10.0,and based on stress analysis of numerical simulation on the axial compression steel rein forced concrete column（ACSRCC） under high-temperature fire,the thermal stress distribution of cross-section is derived and the two results are compared.Based on the conversion principle of different materials stress and the principle of superposition,the numerical calculation method of cross-section stress of ACSRCC under high temperature fire is derived,and the analytical results and simulation data are broadly in line.Finally,the influence rule of the concrete cover thickness and other factors on ACSRCC mechanical properties in high temperature fire is discussed.