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（1 中國航空規(guī)劃建設(shè)發(fā)展有限公司，北京 100120； 2 清華大學(xué)，北京 100084）
［摘要］采用反應(yīng)譜法和時(shí)程分析法，對(duì)位于首都機(jī)場的四機(jī)位機(jī)庫進(jìn)行了豎向、水平及其組合地震反應(yīng)分析，考察地震作用對(duì)大跨度維修機(jī)庫屋蓋結(jié)構(gòu)的影響。分析結(jié)果表明：屋蓋桿件在豎向地震作用下的內(nèi)力分布與在水平地震作用下的有明顯的不同，也不同于一般四邊支承的大跨度屋蓋結(jié)構(gòu)；屋蓋結(jié)構(gòu)的水平地震作用大于豎向地震作用；在三向地震作用下屋蓋桿件的地震內(nèi)力分布不同于任何單向地震作用情況，也不是三向地震的簡單組合；網(wǎng)架與大門架、中梁桁架連接的部位，大門架、中梁桁架及網(wǎng)架靜內(nèi)力較小的桿件，中弦桿件及網(wǎng)架周邊桿件是屋蓋結(jié)構(gòu)在地震作用下的薄弱環(huán)節(jié)。分析結(jié)果可供大跨度維修機(jī)庫結(jié)構(gòu)抗震設(shè)計(jì)參考。
［關(guān)鍵詞］大跨度維修機(jī)庫；屋蓋結(jié)構(gòu)；地震反應(yīng)分析
Seismic response analysis on the roof structure of a long-span hangar
Shen Shungao1, Guo Peng1,2, Zhu Dan1（1 China Aviation Planning and Construction Development Co., Ltd., Beijing 100120, China； 2 Tsinghua University, Beijing 100084, China）
Abstract:The vertical, horizontal and combined seismic response analyses on the long-span hangar at Capital International Airport are carried out using the response spectrum method and the time-history analysis method respectively to investigate the effect of the earthquake action on the roof structure. The analysis results show that the internal force distribution of roof members under the vertical earthquake action is obviously different from that under the horizontal earthquake action, and also different from that of other long-span roof structures with four sides supported; the horizontal seismic response is larger than the vertical seismic response of the hangar roof; the internal force distribution of roof members under the combined earthquake action is different from that under the vertical earthquake action or any unidirectional horizontal earthquake action, and is not the simple combination of the internal force of roof members under the vertical and horizontal earthquake action; the weak links of the hangar roof under the earthquake action are the connection parts of the space truss, the fringe truss beam and the middle truss beam, the members with smaller static internal force of the space truss, the fringe truss beam and the middle truss beam, the middle chord members and the members around the space truss. The analysis results can be for the seismic design reference of the long-span hangar.
Keywords:long-span hangar; roof structure; seismic response analysis
作者簡介：沈順高(1962-)，男，博士，研究員級(jí)高級(jí)工程師，院總工程師。
Email:wujean65@hotmail.com。
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