- 摘 要
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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)大學建筑工程學院城市與工程安全減災省部共建教育部重點實驗室，北京100124; 2 中國航空工業(yè)規(guī)劃設計研究院，北京100120; 3 中廣電廣播電影電視設計研究院，北京100045)[摘要] 對7度抗震設防要求，Ⅳ類場地條件下的國內某大跨度維修機庫進行了多維地震輸入下的動力反應時程分析，考慮地震波沿結構單向、雙向和三向輸入的不同情況，從結構總地震作用、柱頂位移、柱內力等方面進行了比較和分析。研究表明：在多維地震作用下，地震波沿結構坐標軸正向或反向輸入導致結構扭轉方向不對稱；與單向地震作用相比，多維地震作用可使柱的一些內力和位移值增加顯著。還通過比較雙向和三向輸入的反應，研究了豎向地震作用對結構柱列的影響。
[關鍵詞] 飛機庫；大跨度結構；多維地震反應；時程分析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
