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鄒宏德  藍(lán)宗建  梁書(shū)亭  戴  航
（東南大學(xué)土木工程學(xué)院  南京 210096）

[提要]  對(duì)地震作用下鋼筋混凝土巨型框架多功能減振結(jié)構(gòu)主次框架發(fā)生碰撞時(shí)結(jié)構(gòu)的地震反應(yīng)進(jìn)行了分析，研究了間隙單元?jiǎng)恿?shù)的影響。分析結(jié)果表明，在主次框架間可能發(fā)生碰撞的部位設(shè)置緩沖彈簧裝置以減小結(jié)構(gòu)地震碰撞的影響是必要的；間隙單元?jiǎng)恿?shù)對(duì)鋼筋混凝土巨型框架多功能減振結(jié)構(gòu)體系的地震反應(yīng)有著重要的影響，在滿足緩沖彈簧裝置行程限值的條件下，應(yīng)選擇剛度較小的緩沖彈簧裝置。
[關(guān)鍵詞]  鋼筋混凝土巨型框架  結(jié)構(gòu)地震碰撞  有限元方法  時(shí)程分析

The effect of the pounding between the major frame and the minor frame on the seismic responses of multifunctional vibration-absorption RC, megaframe structure during the earthquakes is analyzed. A parametric study is carried out to investigate the influence of the main parameters of the gap elements. The analytical result shows that it is urgently needed to place the buffer string devices to mitigate the seismic responses of the structure between the major frame and the minor frame where the structural seismic pounding could occur. The influence of the main parameters of the gap elements on the seismic responses of the RC megaframe structure is considerable. The smaller stiffness of the buffer string should been chosen when the restrictive condition is admitted.
Keywords: concrete megaframe structure; structural seismic pounding; finite element method; time history analysis