扁钢管混凝土柱——钢梁节点抗震性能研究

Steel Beam Joints—Study on Seismic Performance of Flat Concrete Filled Steel Tubular Column

摘要: 为了解决“凸柱”“露柱”问题，本文提出一种扁钢管混凝土柱-H型钢梁拼接型外环板式节点。通过ABAQUS建立6个有限元模型，在循环荷载作用下，分析此节点的破坏模式和抗震性能。结果表明：增大钢材强度可以有效的缓解节点核心的应力集中；适度增大H-钢梁的截面尺寸可提高节点的抗震性能，过度增大会导致“强梁弱柱”。

Abstract: In order to solve the problem of “convex column” and “exposed column”, this paper proposes a flat concrete-filled steel tubular column-H-shaped steel beam splicing outer ring plate joint. Six finite element models were established by ABAQUS, and the failure mode and seismic performance of the joint were analyzed under cyclic loading. The results show that increasing the strength of steel can effectively alleviate the stress concentration of the joint core. Moderately increasing the section size of the H-steel beam can improve the seismic performance of the joint, and excessive increase will lead to “strong beam and weak column”.