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余志偉， 朱 瑩， 花更生， 周建龍
(現(xiàn)代設(shè)計集團(tuán)華東建筑設(shè)計研究院有限公司，上海200002)[摘要] 上海世博演藝中心上部主體主要由長懸臂桁架和內(nèi)框架組成。考慮到該結(jié)構(gòu)的重要性和特殊性，分別進(jìn)行了有樓板剛度、無樓板剛度及單榀框架的計算，確保結(jié)構(gòu)的安全。采用振型分解反應(yīng)譜法分析了結(jié)構(gòu)的抗震性能，并補(bǔ)充了罕遇地震下的靜力彈塑性分析。對關(guān)鍵構(gòu)件的設(shè)計，闡述了方案比選的過程。對復(fù)雜節(jié)點，進(jìn)行了有限元彈塑性分析。通過精心的結(jié)構(gòu)設(shè)計，達(dá)到了建筑功能與結(jié)構(gòu)形式的完美統(tǒng)一。
[關(guān)鍵詞] 長懸臂桁架；樓板剛度；空間效應(yīng)；環(huán)向拉力Design of the Main Structure of Shanghai World Expo Performance Arts Center
Yu Zhiwei, Zhu Ying, Hua Gengsheng, Zhou Jianlong
( East China Architectural Design & Research Institute Co., Ltd. , Xian Dai Architectural Design Group, Shanghai 200002, China)Abstract: The main structure of Shanghai World Expo Performance Arts Center consists of long-cantilever truss and inner frame. Due to the importance and specialty of the structure, three models of "with real floor stiffness, without floor stiffness and only single frames" were respectively calculated to ensure structural safety. Response spectrum method was adopted to analyze the structural seismic performance, and Pushover analysis was taken in rare earthquake case. Scheme comparison of the key structural member was introduced and complex nodes were emphasized with finite element analysis. Through elaborate structural design, the building's architectural function and structural form come into a perfect unity.
Key words: long-cantilever truss; floor stiffness; integral effect; circumferential tensile force
