（北京维拓时代建筑设计股份有限公司， 北京 100025）

［摘要］结合高烈度区某超高层建筑加强层结构优化设计，研究分析了伸臂桁架和环桁架分别对整体结构的抗侧刚度、自振周期以及中震双向水平地震作用下核心筒墙肢拉应力的影响，根据分析结果确定该超高层建筑加强层布置部位和桁架形式；此外，对比分析了加强层桁架斜腹杆采用防屈曲支撑和普通钢支撑两种形式时，结构在小震作用下的层间位移角、层刚度比等指标，以及在大震作用下的耗能特性、结构整体变形和主体结构损伤状况。优化过程和结论可供类似工程设计参考。

［关键词］加强层； 环桁架； 伸臂桁架； 防屈曲支撑； 动力弹塑性分析

中图分类号：TU973文献标识码：A文章编号：1002-848X(2019)16-0019-06

Structural optimization design of  strengthened story for a super high-rise building  in high seismic intensity area

Leng Dongmei, Zhang Jianliang, Xie Longbao, Li Jing, Li Yingying, An Xu, Li Hongqiu

(Beijing Victory Star Architecture & Civil Engineering Design Co., Ltd., Beijing 100025, China)

Abstract:Combined with the structural optimization design of  strengthened story for a super high-rise building in high seismic intensity area, the influence of outrigger truss and belt truss on the lateral resistance stiffness, the natural vibration period of the whole structure and the tensile stress of the core wall under the action of bidirectional horizontal earthquake when subjected to the moderate earthquake was analyzed. Based on the analysis result, the arrangement of the strengthened story and truss form of the super high-rise building was confirmed. In addition, the indexs of inter-story displacement angle and story stiffness ratio of the structure under small earthquakes, and the energy dissipation characteristics, the overall deformation of the structure and the damage of the main structure under large earthquakes were compared and analyzed when the inclined webs of the strengthened story truss were braced by buckling restrained braces and ordinary steel braces. The optimization process and the conclusion can be used as a reference for similar engineering design.

Keywords:strengthened story; belt truss; outrigger truss; buckling restrained brace; dynamic elasto-plastic analysis

作者简介：冷冬梅，硕士，高级工程师，一级注册结构工程师，Email:863890289@qq.com。