國家大劇院施工與使用階段變邊界約束鋼網(wǎng)殼受力性能分析
羅永峰1，楊薇2，遇瑞1
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(1 同濟大學土木工程學院，上海200092； 2 華東電力設(shè)計院，上海200063)［提要］國家大劇院鋼網(wǎng)殼采用在施工階段和使用階段結(jié)構(gòu)邊界約束不同的設(shè)計方法，這種方法具有結(jié)構(gòu)內(nèi)力分布均勻合理且結(jié)構(gòu)自重輕的優(yōu)點。采用強迫位移法計算策略，對國家大劇院變邊界約束鋼網(wǎng)殼結(jié)構(gòu)進行靜力分析和非線性整體穩(wěn)定性分析，為設(shè)計提供可靠的計算依據(jù)，并通過對傳統(tǒng)常值約束邊界和變約束邊界結(jié)構(gòu)的分析比較，說明變邊界約束結(jié)構(gòu)的特點，證明用于變邊界約束結(jié)構(gòu)分析的強迫位移法計算策略有效。［關(guān)鍵詞］鋼網(wǎng)殼；變邊界約束；強迫位移法；整體穩(wěn)定性Loading Behavior of National Grand Theatre Roof Structure-with Changed Boundaries/Luo Yongfeng1, Yang Wei2, Yu Rui1(1 College of Civil Engineering, Tongji University, Shanghai 200092,China; 2 East China Electric Power Design Institute, Shanghai 200063,China)Abstract:A structure with different boundaries in construction stage and service stage is used in design of the roof structure of National Grand Theatre. The design method can improve the member force distribution in the structure and reduce the structure self weight. The compelling displacement computation technique is adopted for the static analysis and overall buckling analysis of the roof structure. The reliable numerical data are provided for the design. Compared with the traditional structures with constant boundary, the features of the structure with changed boundaries are presented.The efficiency and the accuracy of the compelling displacement computation technique are proved.Keywords:roof reticulated shell; steel structure; changed boundary; compelling displacement technique; overall stability
