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工程力学  2015 

穿芯高强螺栓-端板节点方钢管混凝土框架抗震性能数值分析

, PP. 154-162

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

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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框架的抗震性能,基于一榀两层两跨方钢管混凝土框架的拟静力试验研究结果,利用有限元软件ABAQUS对试验试件进行了非线性数值分析。研究框架的破坏机制、延性、耗能能力及节点性能。在峰值荷载前,数值分析结果与试验结果吻合较好。对轴压比、节点端板厚度、加劲肋厚度以及高强螺栓预拉力等因素进行了分析。结果表明,框架滞回曲线饱满,具有良好的延性和耗能能力,节点在加载过程中未产生塑性变形。当框架柱的轴压比较小时,可形成理想的梁铰破坏机制。增大端板厚度和设置梁端加劲肋可提高结构的刚度与承载力,使框架刚度的退化趋于平缓。高强螺栓预拉力对框架性能无显著影响。

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