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(中國(guó)建筑西南設(shè)計(jì)研究院有限公司，成都 610081)

［摘要］   成都雙流國(guó)際機(jī)場(chǎng)T2航站樓作為西南地區(qū)的交通樞紐，人流密集且易受意外荷載攻擊，應(yīng)對(duì)其進(jìn)行抗連續(xù)倒塌分析。結(jié)合航站樓大廳鋼結(jié)構(gòu)屋蓋的整體結(jié)構(gòu)布置情況，在概念設(shè)計(jì)和拉結(jié)設(shè)計(jì)的基礎(chǔ)上，分析了意外荷載來(lái)源，分別從概念判斷的角度和基于廣義結(jié)構(gòu)剛度的重要性系數(shù)來(lái)確定關(guān)鍵構(gòu)件，采用拆除構(gòu)件法對(duì)大廳鋼結(jié)構(gòu)屋蓋的抗連續(xù)倒塌進(jìn)行了靜力線性分析和靜力非線性分析，論述了大跨鋼結(jié)構(gòu)抗連續(xù)倒塌設(shè)計(jì)的特點(diǎn)。結(jié)果表明結(jié)構(gòu)具有較強(qiáng)的抗連續(xù)倒塌能力，即結(jié)構(gòu)具有足夠的“魯棒性(robustness)”。
［關(guān)鍵詞］   連續(xù)倒塌；   意外荷載；   關(guān)鍵構(gòu)件；   拆除構(gòu)件法；   豎向

Progressive collapse analysis on the large span steel structure of Chengdu
Shuangliu International Airport T2 Terminal Building
Zhao Guangpo, Xiao Kejian, Feng Yuan, Chen Zhiqiang, Xiong Yaoqing, Luo Yu
(China Southwest Architectural Design and Research Institute Co., Ltd., Chengdu 610081, China)
Abstract:As the traffic hub of southwest area，Shuangliu International Airport T2 Terminal has intensive people and it is very possible to be attacked，so it is necessary to proceed progressive collapse analysis. On the basis of conceptual design and binding design，according to the structural composition of the steel structural roof，unexpected load source was analyzed. And key-member was found out according to concept judgement and the importance factor through computation with generalized structure stiffness, then static linear and nonlinear analysis for progressive collapse of the steel structural roof was proceeded through removal key member method. At the same time, features of progressive collapse of the large span steel structure were also represented. The result indicates that the structure has strong ability to resist progressive collapse，i.e. the structure has enough robustness.
Keywords:progressive collapse; unexpected load; key member; removal key member method; vertical push
作者簡(jiǎn)介：趙廣坡，工程師，Email：85566393@qq.com。

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