（1 中衡设计集团股份有限公司， 苏州 215021; 2 江苏省生态建筑与复杂结构工程技术研究中心， 苏州 215021）

［摘要］在结构方案设计阶段，对常见的8种结构体系进行了较为详细的分析对比，最终采用框架（矩形钢管混凝土柱+钢梁-偏心支撑结构体系。提出了消能梁段数值模型，采用PERFORM-3D软件进行了整体结构在大震作用下动力弹塑性分析，评估其抗震性能及塑性发展过程。结果表明，此类结构通过控制框架剪力分担率，可形成双重抗震防线。在小震、中震作用下结构抗侧刚度较大，大震作用下消能梁段首先剪切屈服，整个抗侧体系存在明显的抗侧演化过程，耗能能力强、抗震性能良好且经济合理。基于大震作用下消能梁段塑性转角需求设计腹板加劲肋，此方法保证结构设计与性能目标要求的一致性。

［关键词］钢框架-偏心支撑； 双重抗震防线； 消能梁段； 剪切屈服； 塑性转角

中图分类号：TU375-2， TU317-1文献标识码：A文章编号：1002-848X(2016)23-0010-08

Application study of steel eccentrically braced frame structural system in high seismic intensity areas

Zhang Jin1,2, Yang Lülei1,2,  Zhu Xunyan1,2, Lu Jianglong1,2

（1 ARTS Group Co., Ltd., Suzhou 215021， China;  2 Jiangsu Engineering Institute of Ecological Building & Complex Structure， Suzhou 215021， China）

Abstract:In the structure scheme design stage,  8 kinds of common structural systems were analyzed and compared in detail. Finally, the eccentrically braced frame structural system with rectangular steel tube concrete column and steel beam was adopted. The numerical model of energy dissipated link beam was proposed, and the dynamic elastic-plastic analysis of the whole structure under the action of rare earthquake was carried out by using PERFORM-3D software to evaluate its seismic performance and plastic development process. The results show that this kind of structure can form a dual seismic line by controlling the shear sharing ratio of the frame. Under the frequent earthquake and fortification earthquake, structural lateral stiffness was large, and energy dissipated link beam first suffered shear yield under the action of rare earthquake. The lateral resistant system existed obvious lateral evolution process, with strong energy dissipation capacity, good seismic performance and reasonable economy. The plastic corner of the link beam under the action of rare earthquake should be used for the design of  web plate stiffener, and this method ensure the consistency of structural design and seismic performance demand.

Keywords:steel eccentrically braced frame; dual seismic lines; energy dissipated link beam; shear yield; plastic rotation angle

作者简介：张谨，研究员级高级工程师，一级注册结构工程师， 英国注册结构工程师，Email:zhangjin@artsgroup.cn。