（1 浙江大学建筑设计研究院，杭州 310027； 2 浙江大学建筑工程学院，杭州 310027）

［摘要］针对空间异形柱框架特点，运用非线性有限元计算程序，对在不同方向水平荷载作用下异形柱框架结构进行推覆分析，研究不同轴压比异形柱框架的破坏过程、承载力、延性、侧向位移、扭转、滞回性能及刚度退化等方面的抗震性能特点。结果显示，轴压比的增大对抗震性能有很大影响，尤其会降低框架的延性。

［关键词］异形柱；框架；推覆分析；轴压比；抗震性能

Influence to aseismic performance of 3D-frame with special-shaped columns by axial compression ratio

Cao Yunzhong¹，Gan Gang¹，Tang Jinchun²（1 Architectural Design and Research Institute of Zhejiang University, Hangzhou 310027, China；2 College of Civil Engineering and Architecture, Zhejiang University, Hangzhou 310027, China）

Abstract:According to the features of 3D-frame with special-shaped columns, the calculation program for the structure′s nonlinear finite analysis is used to study the aseismic performance of the 3D-frame with special-shaped columns such as failure process, bearing capacity, ductility, lateral displacement, torsion, hysteretic performance and stiffness degeneracy. The influence regularity on aseismic performance of the 3D-frame by axial compression ratio is discovered after the 3D-frame was analyzed by pushover under horizontal loading with various directions. Results show, the increment of axial compression ratio affects the aseismic performance of the frame obviously, especially for reducing the ductility of the frame.

Keywords:special-shaped column；frame；pushover；axial compression ratio；aseismic performance

作者简介：曹云中，博士，Email:yunzhong6666@163.com。

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