(中国建筑西南设计研究院有限公司，成都 610081)

［摘要］   成都双流国际机场T2航站楼作为西南地区的交通枢纽，人流密集且易受意外荷载攻击，应对其进行抗连续倒塌分析。结合航站楼大厅钢结构屋盖的整体结构布置情况，在概念设计和拉结设计的基础上，分析了意外荷载来源，分别从概念判断的角度和基于广义结构刚度的重要性系数来确定关键构件，采用拆除构件法对大厅钢结构屋盖的抗连续倒塌进行了静力线性分析和静力非线性分析，论述了大跨钢结构抗连续倒塌设计的特点。结果表明结构具有较强的抗连续倒塌能力，即结构具有足够的“鲁棒性(robustness)”。
［关键词］   连续倒塌；   意外荷载；   关键构件；   拆除构件法；   竖向

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
作者简介：赵广坡，工程师，Email：85566393@qq.com。

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