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工程力学  2013 

组合梁挠度计算的改进折减刚度法

DOI: 10.6052/j.issn.1000-4750.2011.08.0557, PP. 285-291

Keywords: 组合梁,部分抗剪连接,挠度,滑移效应,折减刚度法

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Abstract:

该文总结了部分抗剪连接组合梁挠度计算的不同方法,并通过对均布荷载作用下两端简支组合梁跨中挠度的对比分析,讨论了各种方法的特点。针对现行规范中采用的折减刚度法所存在的问题,进行了分析研究,提出了组合梁挠度计算的改进折减刚度法。理论分析和数值结果表明,改进的折减刚度法克服了规范中的折减刚度法所存在的抗剪连接程度增大,组合梁抗弯刚度反而减小导致挠度增大的矛盾,同时考虑了边界条件对折减刚度的影响,且与精确解相比,两者吻合较好。

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