中国华能集团某办公楼关键节点弹塑性分析

Nonlinear Elasto-Plastic Analysis of the Connection Joints of an Office Building Structure

华能集团人才创新创业基地办公楼东侧结构单元,采用混合结构体系(局部6-15轴至6-19轴为四层顶托柱转换)。因造型奇特,受力复杂,结构存在多处关键构件,如悬挑桁架与剪力墙核心筒连接处节点、球形办公室与支撑桁架连接节点等,为保证结构的安全性,利用ABAQUS分析软件,对这些关键节点进行了有限元建模,在大震工况下对关键节点的性能进行了弹塑性有限元分析。结果表明:在大震下,各关键节点除局部单元出现塑性外,节点的整体性能处于弹性状态,满足大震不屈服的抗震性能要求。

The office building for Innovation Base of Huaneng Group is located at the C89 block in the south of the future Science and Technology Zoning Area,Changping District of Beijing.It is at the south of bank of Wenyu River and south side of North Seven Avenue.The east unit of this building is a mixed structure（the top four floors at Bays 6-15 and Bays 6-19 are column supported）.Due to its irregular structural shape and the complicated loading scheme,the seismic performance of the key structural connection components,such as,the connection between the cantilever truss and the shear wall core;the joints between the spherical office and the supporting truss;are analyzed with the elasto-plastic approach using ABAQUS finite element software.The results indicate that,under the design seismic intensity,except for the local plastic zones occurred at the key joints,the overall joints are typically within the elastic zone.The analytical results meet the seismic requirement of non-yielding structural components.