（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］以某高层钢框架-中心支撑结构为例，介绍了塔楼结构方案的比选过程，确定了结构的性能化设计目标及抗震措施；采用YJK和ETABS两种软件对塔楼进行分析对比得出，结构各项整体指标均满足规范要求；采用时程分析法对结构进行多遇地震下的补充分析，对计算结果进行包络设计；采用PERFORM-3D软件对结构进行罕遇地震作用下的动力弹塑性时程分析。结果表明，结构塑性发展程度可控，在进入弹塑性受力阶段后仍然具有较高的刚度和强度；采用ETABS，MIDAS Gen软件对跃层斜撑抗侧刚度、穿层柱屈曲进行专项分析得出，结构安全可靠。

［关键词］钢框架-中心支撑； 弹性时程分析； 动力弹塑性时程分析； 跃层斜撑； 穿层柱； 屈曲分析

中图分类号：TU318文献标识码：A文章编号：1002-848X(2019)01-0060-05

Structural analysis and design of a high-rise steel concentrically-braced frame

Lu Jianglong1,2, Shi Zhixiang1, Shen Xiaoming1,2, Zhu xunyan1,2, Li Gang1, Zhu Songsong1

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

Abstract:Taking a high-rise steel concentrically-braced frame structure as an example, the selection process of tower building structure schemes was introduced, and the performance-based design objectives and seismic measures were determined. YJK and ETABS softwares were used to analyze and compare the tower building, and it’s concluded that the overall indices of the structure meet the requirements of the code. The time-history analysis method was used to supplement the analysis of the structure under frequent earthquakes, and the envelope design of the calculation results was carried out. The PERFORM-3D software was used to carry out dynamic elastic-plastic analysis of the structure under rare earthquakes, and the results show that the degree of plasticity development of the structure is controllable and it still has high stiffness and strength after entering the stage of elastic-plastic mechanical loading. By using ETABS and MIDAS Gen softwares, special analyses were conducted on the lateral stiffness of floor-skipped brace and buckling of floor-skipped columns to conclude that the structure is safe and reliable.

Keywords:steel concentrically-braced frame; elastic time-history analysis; dynamic elastic-plastic time-history analysis; floor-skipped brace; floor-skipped cloumn; buckling analysis

作者简介：路江龙，硕士，高级工程师，一级注册结构工程师，英国注册结构工程师，Email：lujianglong@artsgroup.cn。