(1 西安建筑科技大学土木工程学院， 西安 710055； 2 西安建筑科技大学结构工程与抗震教育部重点实验室， 西安 710055； 3 成都基准方中建筑设计有限公司， 成都 610031)

摘要: 通过建立典型钢框架的连续倒塌分析数值模型，使用拉丁超立方抽样方法抽取随机样本进行可靠度分析，考虑结构参数的不确定性影响，确定完好结构在地震作用下发生局部损坏的概率。 以大震作用下可靠度指标最小的构件作为结构的失效构件，基于整体可靠度方法，采用拆除构件法对失效构件进行拆除并施加地震荷载进行分析，得到不同失效模式下受损结构发生连续倒塌条件可靠度指标和失效概率。 最后结合失效构件的失效概率，研究结构在地震作用下的连续倒塌全概率可靠度。 研究表明，运用可靠度理论对钢框架结构进行连续倒塌可靠度分析，可以直观地得到地震作用下钢框架结构发生连续倒塌的概率，为准确评价钢框架结构在地震作用下的抗连续倒塌能力提供依据。

关键词: 钢框架结构； 连续倒塌可靠度； 拆除构件法； 拉丁超立方抽样； 失效模式

中图分类号:TU391 文献标志码:A 文章编号:1002￣848X(2022)02￣0098￣06

DOI:10. 19701 / j.jzjg.20200939

Vertical progressive collapse reliability analysis of steel frame structure under earthquake

ZHONG Weihui1，2， QIU Shuaizi1， YANG Jia3

(1 School of Civil Engineering， Xi’an University of Architecture and Technology， Xi’an 710055， China；2 Key Lab of Structural Engineering and Earthquake Resistance of China Ministry of Education， Xi’an University of Architectureand Technology， Xi’an 710055， China； 3 Chengdu JZFZ Architectural Design Co.， Ltd.， Chengdu 610031， China)

Abstract: By establishing a numerical model for progressive collapse analysis of a typical steel frame，random samples weretaken by Latin hypercube sampling method for reliability analysis. Considering the influence of uncertainty of structuralparameters， the probability of local damage of the intact structure under the action of earthquake was determined. Takingthe component with the smallest reliability index under the action of a large earthquake as the failed component of thestructure. Based on the overall reliability method， the failed component was removed by the dismantled component methodand the seismic load was applied to analyze it. The progressive collapse condition reliability index and failure probability ofthe damaged structure under different failure modes were obtained. Finally， based on the failure probability of the failedcomponent， the full probability reliability of the structure’s progressive collapse under the action of earthquake was studied.The research shows that the reliability analysis of the progressive collapse of the steel frame structure by the reliability theorycan intuitively obtain the probability of the progressive collapse of the steel frame structure under the action of earthquake，providing a basis for accurately assessing the progressive collapse resistance of the steel frame structure under the action ofearthquake.

Keywords: steel frame structure； progressive collapse reliability； dismantled component method； Latin hypercubesampling； failure mode

∗国家自然科学基金面上项目(51678476)，陕西省重点研发计划项目(2018ZDXM￣SF-097)。

第一作者:钟炜辉，博士，教授，博士生导师，主要从事结构抗倒塌和钢结构稳定方面研究，Email:zhongweihui1980@ 163.com。

[引用本文] 钟炜辉，邱帅子，杨佳. 地震作用下钢框架结构竖向连续倒塌可靠度分析[ J]. 建筑结构，2022，52(2):98￣103，48. ZHONG Weihui，QIU Shuaizi，YANG Jia. Vertical progressive collapse reliability analysis of steel framestructure under earthquake[J]. Building Structure，2022，52(2):98￣103，48.