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徐小燕¹，趙  均¹，朱  丹²，胡  穎³，馮  帆¹，凌沛春¹
(1 北京工業(yè)大學(xué)建筑工程學(xué)院城市與工程安全減災(zāi)省部共建教育部重點(diǎn)實(shí)驗(yàn)室，北京100124; 2 中國(guó)航空工業(yè)規(guī)劃設(shè)計(jì)研究院，北京100120; 3 中廣電廣播電影電視設(shè)計(jì)研究院，北京100045)

[摘要] 對(duì)7度抗震設(shè)防要求，Ⅳ類(lèi)場(chǎng)地條件下的國(guó)內(nèi)某大跨度維修機(jī)庫(kù)進(jìn)行了多維地震輸入下的動(dòng)力反應(yīng)時(shí)程分析，考慮地震波沿結(jié)構(gòu)單向、雙向和三向輸入的不同情況，從結(jié)構(gòu)總地震作用、柱頂位移、柱內(nèi)力等方面進(jìn)行了比較和分析。研究表明：在多維地震作用下，地震波沿結(jié)構(gòu)坐標(biāo)軸正向或反向輸入導(dǎo)致結(jié)構(gòu)扭轉(zhuǎn)方向不對(duì)稱(chēng)；與單向地震作用相比，多維地震作用可使柱的一些內(nèi)力和位移值增加顯著。還通過(guò)比較雙向和三向輸入的反應(yīng)，研究了豎向地震作用對(duì)結(jié)構(gòu)柱列的影響。
[關(guān)鍵詞] 飛機(jī)庫(kù)；大跨度結(jié)構(gòu)；多維地震反應(yīng)；時(shí)程分析

Dynamic response analysis of a long-span hangar under multi-dimensional seismic motions
XuXiaoyan¹, Zhaojun¹, ZhuDan², HuYlng³, FengFan¹, LingPeichun¹
(1 Key Lab of Urban Security and Disaster Engineering, MOE, College of Architecture and Civil Engineering, Beijing University of Technology, Beijing 100124, China; 2 China Aeronautical Project & Design Institute, Beijing 100120, China; 3 Radio, Film & TV Design and Research Institute, Beijing 100045, China)

Abstract: Based on the seismic fortification intensity of 7 and site-class IV, seismic response time history analyses of a long-span hangar subjected to multi-dimensional earthquake motions were performed. The base shears of the structure, lateral displacements and internal forces of supporting columns from one-dimensional, two-dimensional and three-dimensional earthquake inputs, respectively, were compared with each other. The results show that, in the dynamic analyses with three-dimensional seismic inputs, different directions of the inputs, i.e., positive or negative along the axis, result in asymmetric global torsions of the structure; some displacements and internal forces of the columns are increased significantly with multi-dimensional earthquake inputs, compared with the one-dimensional ones. The effects of the vertical earthquake motions on supporting columns were also studied by comparing the results from two-dimensiona.l and three-dimensionalinputs.
Keywords: hangar; long-span structure; multi-dimensional seismic response; time history analysis