半刚性组合框架骨架曲线实用计算方法

发布时间：2018-10-14 15:39

【摘要】：针对组合节点的弯矩-转角计算模型以及组合框架骨架曲线计算模型忽略节点半刚性的问题,探讨组合节点转动刚度和半刚性组合框架骨架曲线的计算方法。基于参数相关性,运用改进的参数灵敏度分析方法,研究外加强环式钢管混凝土柱-钢梁节点的转动刚度。应用二阶分析推导柔性梁柱单元的刚度矩阵;应用得出的节点转动刚度计算模型推导半刚性组合框架骨架曲线的简化计算模型。研究结果表明:改进后的灵敏度分析方法得出的节点参数灵敏度更高。节点半刚性可降低骨架曲线的弹性刚度和下降段斜率。引入节点半刚性的骨架曲线计算模型更加符合组合框架的实际工作性能。
[Abstract]:Aiming at the problem that the calculation model of bending moment and rotation angle of composite joints and the calculation model of skeleton curve of composite frame neglect the problem of joint semi-rigidity, the calculation method of rotational stiffness and semi-rigid composite frame skeleton curve of composite joint is discussed. Based on the correlation of parameters, the rotational stiffness of externally reinforced concrete filled steel tubular column-steel beam joints is studied by using the improved parameter sensitivity analysis method. The stiffness matrix of the flexible Liang Zhu element is derived by second-order analysis, and the simplified calculation model of the skeleton curve of semi-rigid composite frame is derived by using the node rotation stiffness calculation model. The results show that the sensitivity of the improved sensitivity analysis method is higher. The elastic stiffness of the skeleton curve and the slope of the descending section can be reduced by semi-rigid joints. The calculation model of skeleton curve with semi-rigid joints is more suitable for the practical performance of composite frame.
【作者单位】：华南理工大学土木与交通学院;华南理工大学亚热带建筑科学国家重点实验室;
【基金】：国家自然科学基金资助项目(51778241,51708226,51378009,51378219,51638009) 中央高校基本科研业务费专项资金资助项目(2017BQ086;2017ZD026) 亚热带建筑科学国家重点实验室基金资助项目(2018ZB35,2017ZB28,2017KD22)~~
【分类号】：TU398.9

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