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节点刚度对单层柱面网壳动力稳定性的影响

DOI: 10.13197/j.eeev.2014.02.27.xuesd.004, PP. 27-33

Keywords: 单层柱面网壳,精细化模型,节点刚度,动力稳定性,地震动峰值加速度

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Abstract:

采用时程分析法研究了PGA(地震动峰值加速度)变化时,单层柱面网壳精细化模型节点刚度变化对结构动力稳定性的影响。研究中考虑了结构参数(矢跨比、长宽比等)的变化,通过改变节点壁厚实现节点刚度的变化,共建立了4组精细化模型。对比分析结果发现所有模型组得出的规律接近,即当PGA超过结构的失稳临界加速度值时,PGA越小节点刚度的增加对提高结构抗动力失稳的效果越明显,并且此规律受矢跨比、长宽比等结构参数变化的影响很小。

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