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工程力学  2013 

半刚性连接钢框架二阶弹塑性稳定分析的QR法

DOI: 10.6052/j.issn.1000-4750.2011.09.0644, PP. 1-7

Keywords: 钢框架,稳定分析,QR法,半刚性连接,弹塑性,二阶效应

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Abstract:

基于QR法研究半刚性连接钢框架的稳定性，采用梁两端附带零长度转动弹簧的通用半刚性连接梁单元，通过转动弹簧和Kishi-Chen三参数模型来模拟梁柱半刚性连接的非线性力学性能，考虑二阶效应的影响，采用塑性铰模型及修正的Newton-Raphson迭代法，建立了平面钢框架二阶弹塑性稳定分析的QR法计算格式和步骤，并设计了相应的C++源程序，最后通过典型算例分析了半刚性连接钢框架的稳定性能，表明了该算法的优越性。

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