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方钢管混凝土框架抗震性能试验研究与非线性有限元分析

, PP. 126-133

Keywords: 方钢管混凝土框架,穿芯高强螺栓-端板梁柱节点,非线性有限元分析,抗震性能

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Abstract:

为研究采用穿芯高强螺栓-端板节点的方钢管混凝土柱-钢梁平面框架的抗震性能,制作了3榀方钢管混凝土框架试件,通过低周反复荷载试验,研究了框架的抗震性能,分析了轴压比、梁柱线刚度比对框架抗震性能的影响。在考虑几何、材料及接触非线性的基础上,采用有限元软件ABAQUS6.10对试验框架进行了低周反复荷载作用下的精细化数值模拟。与试验结果的比较表明,数值分析结果与试验结果吻合较好,具有较好的精度,可用于方钢管混凝土框架的分析。基于数值分析结果,剖析了框架梁柱连接节点、柱脚等关键受力部位的应力发展过程,明确了框架的受力机理和破坏机制。

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