- 摘 要
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賴洪濤，唐嘉敏，易偉文，孫傳偉（華南理工大學建筑設計研究院，廣州 510641）
［摘要］新建的天津博物館建筑面積達55 000m2。因內部大空間的需要，樓層平面凹凸不規(guī)則、樓板不連續(xù)。由于立面造型的需要，屋蓋四周設有大懸挑桁架結構，最大出挑15m，并下掛層4，5樓板，不僅造成結構豎向質量分布不均勻，還使樓蓋的轉動慣量增大。針對以上超限情況，采用抗震性能優(yōu)良的鋼框架支撐結構體系，利用樓、電梯位置盡可能設置對稱的鋼支撐框架，提高結構抵抗扭轉效應的能力。采用多種有限元軟件進行分析，并根據(jù)性能化設計要求提出主要抗震措施，以確保大跨度懸挑結構的安全。
［關鍵詞］大跨度懸挑結構；鋼支撐框架；性能化設計；豎向振動；舒適度
中圖分類號：TU375文獻標識碼：A文章編號：1002-848X(2012)04-0060-05
Structural-design and research on Tianjin Museum
Lai Hongtao, Tang Jiamin, Yi Weiwen, Sun Chuanwei(Architecture Design and Research Institute, South China University of Technology, Guangzhou 510641, China)
Abstract:The newly built Tianjin Museum has a total floor area of 55 000m2. In order to meet the requirement of large interior space, the floors are designed to be irregular and discontinuous. As the need for elevation modeling, some trusses with large cantilever span are set around the roof. The maximum cantilever span of the trusses is up to 15m and there are one to two floors hanging on it. Therefore, the vertical mass distribution of the structure is not regular and the floor inertia moment is great. Based on the above situation, steel frame-brace system with excellent seismic performance is adopted. Some steel braces are set utilizing the places of staircases and elevator halls to strengthen the anti-reverse capacity of the structure. The structure was analyzed by several FEM analysis programs, and some main structural measures were described, which obtained from performance-based design to ensure the safty of the large span cantilever structure.
Keywords:large span cantilever structure; steel frame-brace; performance-based design; vertical vibration; comfort index
作者簡介：賴洪濤，一級注冊結構工程師，高級工程師，Email：gzyayun2010@qq.com。
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