（西安建筑科技大学土木工程学院，西安 710055）

[摘要]  由于钢筋混凝土异形柱截面几何性质的独特性，需要考虑不同地震作用下结构的反应。运用大型有限元分析软件ANSYS，对一栋12层小高层住宅在0°角和45°角的水平地震作用下进行模态分析、反应谱分析以及设防烈度下的时程分析，研究了钢筋混凝土异形柱-短肢剪力墙结构的动力特性和抗震能力。结果表明，异形柱方向性较强，在不同的地震作用方向下的受力有较大差异，在一定的剪力墙刚度保证下，结构依旧能在设防烈度下处于弹性工作阶段。

[关键词]  异形柱;短肢剪力墙;ANSYS有限元分析;水平地震力

中图分类号：TU375，TU352.11，P315.9      文献标识码：A      文章编号：1002-848X(2013)S1-1124-04

作者简介：赵平，博士，教授，博士生导师，主要研究方向为工程项目控制与决策、土木工程施工与管理、建筑工程计算机仿真，Email：zhao_ping@163.com。

Research on seismic behavior of RC frame of short-limb shear wall structure with special-shaped columns under different direction of horizontal seismic loading

Zhao Ping, Luo Zhengnan

(School of Civil Engineering, Xi’an University of Architecture and Technology, Xi’an 710055,China)

Abstract: Due to the particularity of geometric property of reinforced concrete special-shaped cross-section, structure response in different horizontal seismic directions should be taken into account. The dynamic characteristics and earthquake resistant abilities of the RC frame of short-pier shear wall structure with special-shaped columns in a 12-storey small high-rise residential building under the horizontal seismic loading in the directions of 0 degree and 45 degree are studied in this paper by making modal analysis, response spectrum analysis and time-history through finite-element method analytical software ANSYS. The results show that, the special-column has strong direction, different columns under the different loading direction have a obvious difference，on condition of the enough stiffness of shear-wall, structure can still work in the elastic stage under the fortification intensity.

Keywords: special-shaped column; short-limb shear wall; ANSYS finite-element analysis; horizontal seismic loading