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（北京維拓時代建筑設計股份有限公司， 北京 100025）
［摘要］結合高烈度區(qū)某超高層建筑加強層結構優(yōu)化設計，研究分析了伸臂桁架和環(huán)桁架分別對整體結構的抗側剛度、自振周期以及中震雙向水平地震作用下核心筒墻肢拉應力的影響，根據(jù)分析結果確定該超高層建筑加強層布置部位和桁架形式；此外，對比分析了加強層桁架斜腹桿采用防屈曲支撐和普通鋼支撐兩種形式時，結構在小震作用下的層間位移角、層剛度比等指標，以及在大震作用下的耗能特性、結構整體變形和主體結構損傷狀況。優(yōu)化過程和結論可供類似工程設計參考。
［關鍵詞］加強層； 環(huán)桁架； 伸臂桁架； 防屈曲支撐； 動力彈塑性分析
中圖分類號：TU973文獻標識碼：A文章編號：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
作者簡介：冷冬梅，碩士，高級工程師，一級注冊結構工程師，Email:863890289@qq.com。
