白  嘉¹，赵  均¹，朱  丹²，赵伯友²，徐小燕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，北京100011)

[提要] 对某大跨维修机库进行了7度设防烈度不同强震水准下的弹塑性时程反应分析。结果表明：中震作用下，结构总地震作用及柱顶位移的弹塑性时程分析结果与弹性分析结果接近，仅个别构件开始出现塑性铰，结构总体基本处于弹性工作状态；大震作用下，机库后柱列各柱等构件出现塑性铰，其中，有个别构件塑性铰进入IO-LS阶段，其余均处于B -IO阶段；结构在大震的弹塑性工作阶段，仍有较好的整体刚度和承载能力，处于可修状态，柱顶最大位移角远小于其限值。
[关键词] 大跨度维修机库；地震反应分析；弹塑性分析；时程分析

    Elasto-plastic Seismic Response Analysis of a Long-span Hangar
    Bai Jia¹,  Zhao Jun¹,  Zhu Dan²,  Zhao Boyou²,  Xu Xiaoyan¹
    (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 100011, China)

Abstract: Elasto-plastic response time-history analyses of a long-span hangar structure were performed for different levels of earthquake inputs based on the seismic fortification intensity of 7. For the moderate earthquake input, the total seismic loads and lateral drifts of the hangar from elasto plastic response analysis are close to those from elastic analysis and, as a whole, the structure behaves roughly elastically. For the rare major earthquake input, the structure behaves elasto-plastically. Plastic hinges are formed in the supporting columns at the back of the hangar and a small number of other elements, in which very few have reached the IO-LS phase and the rest ( majority)  remain in the B-IO phase. The maximum drift angle of supporting columns is much smaller than the limit. The overall stiffness and bearing capacity of the structure are adequate in such a major earthquake.
Keywords: ong-span hangar; seismic response; elasto-plastic analysis; time history analysis