某外形收进超高层结构斜柱钢环梁节点有限元分析

Finite Element Analysis of Steel Ring Beam Joint of Inclined Column of Super High-Rise Structure with Retracted Profile

针对某外形收进的超高层钢管混凝土斜柱节点,基于对斜柱区域内力传递路径的分析,按照钢环梁节点构造的方式对斜柱底部节点进行了设计。通过ABAQUS建立节点的有限元模型,根据结构整体计算结果施加荷载,对相贯节点的应力、破坏模式进行研究。分析结果表明:本工程斜柱钢环梁节点在设计荷载作用下基本处于弹性状态,满足抗震性能设计要求。斜柱节点在相贯处混凝土出现了应力集中,同类工程中若出现更大的设计荷载可考虑对此处采取加厚钢板等构造加强措施。

Focuses on a super-tall concrete-filled steel tubular inclined column joint with a retracted profile.Based on the analysis of the force transfer path within the inclined column region,the bottom node of the inclined column is designed in accordance with the structure of the steel ring beam joint.A finite element model of the joint is established using ABAQUS,and the load is applied according to the overall structural calculation results.The stress and failure modes of the intersecting joint are studied.The analysis results show that the inclined column steel ring beam joint in this project is basically in an elastic state under the design load,meeting the seismic performance design requirements.The concrete at the intersection of the inclined column joint shows stress concentration.If larger design loads occur in similar projects,structural reinforcement measures such as thickening steel plates can be considered.