徐小燕¹，赵  均¹，朱  丹²，胡  颖³，冯  帆¹，凌沛春¹
(1 北京工业大学建筑工程学院城市与工程安全减灾省部共建教育部重点实验室，北京100124; 2 中国航空工业规划设计研究院，北京100120; 3 中广电广播电影电视设计研究院，北京100045)

[摘要] 对7度抗震设防要求，Ⅳ类场地条件下的国内某大跨度维修机库进行了多维地震输入下的动力反应时程分析，考虑地震波沿结构单向、双向和三向输入的不同情况，从结构总地震作用、柱顶位移、柱内力等方面进行了比较和分析。研究表明：在多维地震作用下，地震波沿结构坐标轴正向或反向输入导致结构扭转方向不对称；与单向地震作用相比，多维地震作用可使柱的一些内力和位移值增加显著。还通过比较双向和三向输入的反应，研究了竖向地震作用对结构柱列的影响。
[关键词] 飞机库；大跨度结构；多维地震反应；时程分析

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