（苏州市吴中区建筑工程施工图审查中心, 苏州 215128）

［摘要］偏心支撑结构弹性阶段刚度大，塑性阶段耗能能力强，是适用于高烈度震区的一种有效的抗侧力结构体系。首先介绍了偏心支撑耗能梁段内力分布特点和偏心支撑耗能机构，根据偏心支撑结构在地震荷载作用下耗能梁段进入塑性的破坏特点，提出了耗能梁段采用曲壳单元和其余构件采用梁单元的非线性有限元模型来分析偏心支撑钢框架在循环荷载作用下耗能的性能和破坏机理。通过有限元模拟计算分析，得到了偏心支撑钢框架抗震对策。

［关键词］偏心支撑； 耗能梁段； 壳单元； 梁单元

中图分类号： TU352.11    文献标识码： A    文章编号： 1002-848X(2015)S2-0475-03

Eccentrically braced steel frames energy-dissipation mechanisms and seismic design recommendation

Shen Xiaoming

(Wuzhong Construction Drawing Inspection Center of Suzhou, Suzhou 215128, China)

Abstract: Eccentrically braced steel frame is a lateral load-resisting system which applys high intensity area and can provide the high elastic stiffness that meets higher steel building drift requirement. An introduction of forces in links and energy dissipation mechanisms of eccentrically braced steel frames was provided. In that eccentrically braced steel frames will collapse after the link beams go into plastic deformation under earthquake load. A new analytical model which includes shell element apply to link beams with large deformation and plastic deformation and beams element apply to other parts of structure was presented for analyzing eccentrically braced steel frames energy-dissipation behavior and collapse mechanism. The seismic design recommendations of eccentrically brace were presented.

Keywords: eccentrically braced steel frame; energy-dissipation links； shell element； beam element

作者简介：沈晓明，硕士，一级注册结构工程师，Email:761730785@qq.com。