【摘要】 为了研究及完善钢管混凝土叠合柱结构基于性能的抗震设计方法,首先根据普通钢筋混凝土柱性能界限点的定义确定了钢管混凝土叠合柱的5个性能界限状态。基于钢材和混凝土非线性材料本构关系,采用MATLAB编制了截面条带法计算分析程序,分析研究了钢管混凝土叠合柱的各性能点所对应的截面变形情况。然后根据影响钢管混凝土叠合柱各个性能点的参数分析结果,得到了各性能点所对应的截面曲率计算公式。最后采用塑性铰理论建立钢管混凝土叠合柱的各性能状态的控制方程。同时分析了叠合柱在性能界限状态下的延性和位移角需求,为叠合柱的工程设计提供参考。更多还原

【Abstract】 In order to study the performance-based seismic design method for steel tube-reinforced concrete columns,this paper firstly defined four performance limit states of steel tube-reinforced concrete columns according to the definition of the performance limit states of reinforced concrete column. Based on the nonlinear constitutive relationship of steel and concrete,the deformation of the composite section under each performance limit states were analyzed by the strip method using MATLAB program. Then parametric analyses were conducted to obtain the formula of curvature under each performance limit states. Finally,the governing equations of performance limit states for steel tube-reinforced concrete columns are deduced based on the plastic hinge theory. The demand of ductility and drift ratio under each performance limit states are analyzed,which can provide valuable reference for the designing of steel tube-reinforced concrete column.更多还原