基于节点冲切破坏的板柱结构连续倒塌可靠性分析

发布时间：2018-11-11 11:58

【摘要】：从结构体系可靠度的角度认识钢筋混凝土板柱结构的抗连续倒塌性能,用Monte-Carlo连续成组抽样方法对以节点冲切破坏为主的板柱结构连续倒塌进行可靠度分析。在建立板柱节点功能函数的基础上,推演了抗冲切承载力分布及荷载基本变量分布和荷载效应组合的方法。通过计算初始条件下任意一个板柱节点失效的概率和一个节点失效条件下其他节点失效的条件概率,分析了不同位置板柱节点在抗连续倒塌中的重要性以及板柱结构的抗连续倒塌鲁棒性指标。结果表明:底层中柱节点冲切失效最容易引起其他节点的连续性破坏及倒塌,按我国规范设定了柱顶贯通受压钢筋的板柱结构鲁棒性指标比较高。
[Abstract]:The continuous collapse resistance of reinforced concrete slab-column structures is recognized from the point of view of structural system reliability, and the reliability of continuous collapse of slab-column structures is analyzed by Monte-Carlo continuous group sampling method. Based on the function of slab-column joints, the distribution of punching shear capacity, the distribution of basic load variables and the combination of load effects are deduced. By calculating the probability of any slab-column joint failure under initial condition and that of other joints under one joint failure condition, The importance of slab-column joints at different positions in continuous collapse and the robustness index of slab-column structures against continuous collapse are analyzed. The results show that the failure of punching in the bottom column joint is the most likely to cause the continuous failure and collapse of other joints. According to the code of our country, the robustness index of the slab-column structure with the column top through the compressed steel bar is relatively high.
【作者单位】：湖南大学土木工程学院;中机国际工程设计研究院;
【基金】：国家自然科学基金项目(51178175,51338004)
【分类号】：TU375;TU312.3

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