- 摘 要
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(奧雅納工程顧問， 深圳 518048)
［摘要］深圳某證券公司總部大樓結(jié)構(gòu)高度為201.4m，采用鋼框架-混凝土核心筒結(jié)構(gòu)體系，屬于超B級復雜超高層超限結(jié)構(gòu)。本塔樓結(jié)構(gòu)南北立面設置全樓貫通的空腔，造成了外框梁的局部缺失。對該結(jié)構(gòu)在水平和豎向荷載作用下受力機制進行深入研究。結(jié)果表明：論證了在外框有所削弱的情況下結(jié)構(gòu)抗側(cè)性能仍能滿足設計要求；同時南北立面帶空腔的框架在豎向荷載作用下具有足夠的安全度，變形也在合理范圍內(nèi)。采用LS-DYNA軟件對結(jié)構(gòu)進行大震動力彈塑性時程分析，結(jié)果表明，在罕遇地震作用下結(jié)構(gòu)各構(gòu)件的抗震性能滿足性能目標，結(jié)構(gòu)整體能夠滿足“大震不倒”的要求，并對局部構(gòu)件進行了合理的加強，確保結(jié)構(gòu)具有更好的抗震及抗風性能。
［關鍵詞］超B級超限結(jié)構(gòu)；南北立面空腔；外框削弱；受力機制；動力彈塑性時程分析
中圖分類號：TU318-2文獻標識碼：A文章編號：1002-848X(2021)10-0012-07
Design and analysis of the special frame of the headquarters building of a securities company in Shenzhen
QU Tao, YI Jian, LIN Hai, XU Zipeng
(ARUP, Shenzhen 518048, China)
Abstract:The headquarters building of a securities company in Shenzhen has a structural height of 208m, and adopts a steel frame-concrete core tube structure system, which belongs to the super B-class complex super high-rise over-limit structure. The south and north fa-ades of the tower structure are provided with cavities that penetrate the entire building, resulting in partial lack of outer frame beams. In-depth study of the structure’s force mechanism under horizontal and vertical loads. The results show that it is demonstrated that the lateral performance of the structure can still meet the design requirements even when the outer frame is weakened. At the same time, the frame with cavities on the north and south facades has sufficient safety under the action of vertical loads, and the deformation is within a reasonable range. The LS-DYNA software was used to analyze the elasto-plastic time-history of the structure under rare earthquake. The results show that the seismic performance of each component of the structure meets the performance target under the action of rare earthquake, and the structure as a whole can meet the requirements of “not falling under rare earthquake”. Reasonable reinforcement has been given to local components to ensure that the structure has better seismic and wind resistance.
Keywords:super B-class over-limit structure;the frame with cavities on the north and south facades;outer frame weaken;force mechanism;elasto-plastic time-history analysis
作者簡介：屈濤，碩士，工程師，一級注冊結(jié)構(gòu)工程師， Email: 30300277@qq.com。
