新型隔板贯通式钢梁-矩形管钢柱节点力学性能研究

STUDY ON MECHANICAL PROPERTIES OF JOINTS CONNECTING H-SHAPED STEEL BEAM AND RECTANGULAR STEEL TUBE COLUMN WITH A NEW-TYPE DIAPHRAGM

针对居住类钢结构建筑面临的凸梁凸柱、梁柱节点处建筑包裹困难的问题,以实际工程为背景,提出一种具有新型贯通隔板的H型钢梁-矩形管钢柱节点。根据GB 50017—2017《钢结构设计标准》对节点进行设计后,使用有限元分析软件ABAQUS建立了5个节点模型,对新型节点与普通隔板贯通节点进行往复荷载作用下的弹塑性对比分析研究,对矩形管钢柱强、弱轴方向的节点力学性能进行对比分析。研究表明:新型节点的延性、刚度和耗能能力与普通节点基本相同;新型节点的塑性发展规律与普通节点有差异,主要体现在节点域和隔板上;与矩形管钢柱轴连接时,节点域的变形应引起足够重视,在结构变形计算时宜考虑其影响。建议在使用新型节点时做强节点域设计,并适当增加新型隔板的厚度。

For the problems of residential steel structure buildings that steel members protrude from the wall surface and the building decoration at the joint is difficult,based on the actual engineering,the paper proposed a new type of diaphragm-through steel beam-column joint.According to the current specifications,five joints models were established by the finite element analysis software ABAQUS.The elastoplastic contrast analysis of the new joint and traditional diaphragm-through joint was carried out under cyclic loads.The mechanical properties of the joints in the major and secondary axial direction were analyzed.The research showed that the ductility,stiffness and energy consumption of the new joint were basically the same as those of the common joint;the plasticity development law of the new joint was different from that of the common joint,mainly reflected in the panel zone and the diaphragm;when connected to the secondary axis of the rectangular steel tube column,the shear deformation of panel zone should be paid enough attention,and its influence should be considered in the calculation of structural deformation.It was recommended to make a strong panel zone design when using new joint,and increase the thickness of new-type diaphragm.