（华建集团华东建筑设计研究总院， 上海 200002）

［摘要］某超高层钢结构采用钢框架+钢支撑筒结构体系，并采用了屈曲约束支撑（BRB）和钢连梁作为消能构件。塔楼由5个避难层自下而上分成编号为Ⅰ～Ⅵ六个分区。通过改变六个分区消能构件的布置情况，设计了多种消能减震方案。通过对不同消能减震方案进行罕遇地震弹塑性时程分析，比较结构层间位移角、顶点位移、能量耗散及构件损伤等指标，总结了屈曲约束支撑的布置区域及消能构件（BRB和钢连梁）的屈服承载力等因素对结构减震性能的影响。结果表明：在Ⅰ～Ⅱ区布置BRB和钢材等级为Q345的高屈服承载力钢连梁，以上各区布置钢材等级为Q235的低屈服承载力钢连梁的消能构件布置方案减震效率高，且相对经济合理。

［关键词］超高层钢结构； 消能减震； 弹塑性分析； 屈曲约束支撑； 钢连梁；  构件损伤

中图分类号：TU318+.1,  TU391文献标识码：A文章编号：1002-848X(2020)18-0115-07

Optimal design of energy dissipation scheme for a super high-rise steel structure apartment

LI Lishu, CHEN Guangyuan, BAO Lianjin

（Arcplus Group PLC East China Architectural Design & Research Institute, Shanghai 200002, China）

Abstract:Steel frame+steel braced core system was adopted in a super high-rise structure which used buckling restrained braces(BRB) and steel coupling beam as energy dissipation component. Tower was divided into six regions numbered fromⅠ to Ⅵ from the bottom up by five refuge floors. By changing the layout of the six partition energy dissipation components, a variety of energy dissipation  schemes had been designed. Through the elastoplastic time history analysis of rare earthquakes for different energy dissipation schemes, and comparing structural interlayer displacement angle, vertex displacement, energy dissipation and component damage and other indicators, the influence of the layout area of buckling restraint supports and energy dissipating components such as the yield capacity of BRB and steel coupling beams on the shock absorption performance of the structure and other factors were summarized. The results show that BRB and high-yield steel coupling beams with steel grade Q345 are arranged in zones Ⅰ～Ⅱ, and the energy dissipation component arrangement scheme of low-yield steel coupling beams with steel grade Q235 in the above areas has high shock absorption efficiency in energy dissipation and economic relatively.

Keywords:super high-rise steel structure; energy dissipation; elastoplastic analysis; buckling restrained braces; steel coupling beams; component damage

作者简介：┣李立树，硕士，高级工程师，Email:lishu_li@ecadi.com。