- 摘 要
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(1 西安建筑科技大學(xué)土木工程學(xué)院， 西安 710055； 2 西安建筑科技大學(xué)結(jié)構(gòu)工程與抗震教育部重點實驗室， 西安 710055； 3 成都基準方中建筑設(shè)計有限公司， 成都 610031)
摘要: 通過建立典型鋼框架的連續(xù)倒塌分析數(shù)值模型，使用拉丁超立方抽樣方法抽取隨機樣本進行可靠度分析，考慮結(jié)構(gòu)參數(shù)的不確定性影響，確定完好結(jié)構(gòu)在地震作用下發(fā)生局部損壞的概率。 以大震作用下可靠度指標(biāo)最小的構(gòu)件作為結(jié)構(gòu)的失效構(gòu)件，基于整體可靠度方法，采用拆除構(gòu)件法對失效構(gòu)件進行拆除并施加地震荷載進行分析，得到不同失效模式下受損結(jié)構(gòu)發(fā)生連續(xù)倒塌條件可靠度指標(biāo)和失效概率。 最后結(jié)合失效構(gòu)件的失效概率，研究結(jié)構(gòu)在地震作用下的連續(xù)倒塌全概率可靠度。 研究表明，運用可靠度理論對鋼框架結(jié)構(gòu)進行連續(xù)倒塌可靠度分析，可以直觀地得到地震作用下鋼框架結(jié)構(gòu)發(fā)生連續(xù)倒塌的概率，為準確評價鋼框架結(jié)構(gòu)在地震作用下的抗連續(xù)倒塌能力提供依據(jù)。
關(guān)鍵詞: 鋼框架結(jié)構(gòu)； 連續(xù)倒塌可靠度； 拆除構(gòu)件法； 拉丁超立方抽樣； 失效模式
中圖分類號:TU391 文獻標(biāo)志碼:A 文章編號: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
∗國家自然科學(xué)基金面上項目(51678476)，陜西省重點研發(fā)計劃項目(2018ZDXM￣SF-097)。
第一作者:鐘煒輝，博士，教授，博士生導(dǎo)師，主要從事結(jié)構(gòu)抗倒塌和鋼結(jié)構(gòu)穩(wěn)定方面研究，Email:zhongweihui1980@ 163.com。
[引用本文] 鐘煒輝，邱帥子，楊佳. 地震作用下鋼框架結(jié)構(gòu)豎向連續(xù)倒塌可靠度分析[ J]. 建筑結(jié)構(gòu)，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.
