钢管混凝土L形柱-H型钢梁Z字形拼接节点受力性能分析  

MECHANICAL PROPERTIES ANALYSIS OF Z-SHAPED SPLICING JOINT OF CONCRETE-FILLED L-SHAPED STEEL TUBULAR COLUMN AND H-SECTION BEAM

作　　者：白正仙[1] 白雅日图 刘学春[1] BAI Zhengxian;BAI Yaritu;LIU Xuechun(Beijing Engineering Research Centre of High-Rise and Large-Span Prestressed Steel Structures,Beijing University of Technology,Beijing 100124,China)

机构地区：[1]北京工业大学,北京市高层和大跨度预应力钢结构工程技术研究中心,北京100124

出　　处：《工业建筑》2020年第11期153-161,194,共10页Industrial Construction

基　　金：国家重点研发计划(2016YFC0701100);国家自然科学基金项目(51978013)。

摘　　要：对一种钢管混凝土L形柱-H型钢梁Z字形拼接节点进行了有限元参数分析。通过改变7种参数,建立22个模型,分析各节点的受力性能。分析表明:工程中可以省去腹板处拼接板的连接、采用削弱型上下部翼缘加劲肋替代矩形上、下部翼缘加劲肋;增加翼缘高强螺栓数量,能够提高节点的承载能力和总耗能,但是延性性能有所降低;增加翼缘高强螺栓预拉力,能够提高节点的滑移荷载和总耗能,延缓节点的滑移;增加上、下部翼缘加劲肋厚度,能够提高节点的正向峰值荷载和总耗能;增加上、下部翼缘加劲肋高度,能够提高节点的滑移荷载和总耗能;上部翼缘加劲肋能够显著提高节点的受力性能。各节点具有良好的延性和塑性转动能力。In this paper,the finite element parameters of a kind of Z-joint of concrete filled steel tubular L-shaped column and H-shaped steel beam were analyzed.By changing seven parameters,22 models were established to analyze the mechanical properties of each joint.The analysis showed that the connection of the splice plate at the web could be omitted,and the stiffeners of the weakened upper and lower flange could be used to replace the stiffeners of the rectangular upper and lower flange;increasing the number of high-strength flange bolts could improve the bearing capacity and total energy consumption of the joint,but the ductility performance was reduced;increasing the pretension of flange high-strength bolts could improve the sliding load and total energy consumption,and delay the slip of the joint;increasing the thickness of the upper and lower flange stiffeners could improve the positive peak load and total energy consumption of the joint;increasing the height of the upper and lower flange stiffeners could improve the slip load and total energy consumption of the joint;the upper and lower flange stiffeners could significantly improve the mechanical properties of the joint.Each joint had good ductility and plastic rotation capacity.

关 键 词：装配式钢结构 梁柱节点 有限元分析 受力性能 破坏模式 

分 类 号：TU398.9[建筑科学—结构工程]