矩形钢管混凝土框架节点有限元数值模拟

Rectangular finite element numerical simulation of concrete filled steel tubular frame

为评估矩形钢管混凝土框架节点的抗剪承载力,以杭州瑞丰大厦梁柱节点为研究背景,基于混凝土塑性损伤理论,采用有限元分析软件abaqus,对矩形钢管混凝土框架节点核心区的削弱变化进行了非线性有限元分析,得到其抗剪承载力.结果表明:经过节点核心区轴压比、壁厚比、高宽比的线性变化,其结构发生了破坏,破坏区域主要发生在节点的核心区域.本文研究成果为矩形钢管混凝土框架节点核心区抗剪承载力的设计提供了理论依据.

To evaluate shear capacity of rectangular steel tube concrete shear, this paper took Hangzhou Ruifeng building concrete-filled steel tube beam-column joints as the research background, based on the concrete damage theory and finite element analysis software Abaqus, carried out the nonlinear finite element analysis to the weakening changes of the rectangle steel tube concrete frame joint core region, and obtained the shear bearing capacity. The results show that after the shear axial compression ratio, wall thickness ratio and ratio of linear change have taken place, the structure is damaged, and the damage areas mainly occurs in the core area of the node. This research results for rectangular steel tube concrete frame joint core shear capacity design provides a certain theoretical basis.