某超高层结构关键节点有限元分析

FINITE ELEMENT ANALYSIS OF KEY JOINTS IN A SUPER HIGH-RISE BUILDING STRUCTURE

为抵抗水平地震作用和风荷载,某450m超高层采用“巨型框架-核心筒-伸臂桁架”的结构体系。该体系有两种关键节点,巨柱与伸臂桁架节点、核心筒与伸臂桁架节点。文中采用ABAQUS通用有限元分析软件,建立了两类节点的精细化有限元模型,分析了控制工况下节点各构件的应力状态。结果表明两种关键节点均满足中震不屈服的抗震性能目标,且满足强节点弱构件的抗震设计要求。

To resist horizontal seismic action and wind load,the mega frame-core-outrigger lateral resisting system was adopted in a 450m high-rise building.In addition,the system includes two kinds key joints which are mega column-outrigger joint and core-outrigger joint.Furthermore,two kinds of key joints were simulated by the ABAQUS software to analyze the stress condition of members under control load cases.The results show that both kinds of key joints meet the performance-based seismic design goal of unyielding during the design earthquake,at the same time,and the seismic design requirements of strong connection and weak member are satisfied.