基于响应面法索杆张力结构的可靠度研究

1)浙江大学建筑工程学院,杭州 310058; 2)中信建筑设计研究总院有限公司,武汉 430014

结构工程; 索杆张力结构; 可靠度分析; 响应面法; 可靠指标; 拉索松弛; 结构失效

Reliability analysis of cable-strut tensile structures based on response surface method
Xiao Nan1, Yang Fengchun1, and Zhao Wenzheng2

Xiao Nan1, Yang Fengchun1, and Zhao Wenzheng21)College of Civil Engineering and Architecture, Zhejiang University, Hangzhou 310058, P.R.China2)CITIC Institute of Architectural Design & Research Wuhan, Wuhan 430014, P.R.China

structural engineering; cable-strut tensile structure; reliability analysis; response surface method; reliability index; cable stress relaxation; structure failure

DOI: 10.3724/SP.J.1249.2014.02179

备注

研究索杆张力结构在极限状态下的可靠性,利用可靠度分析中的响应面法,对索穹顶结构在极限状态下的可靠性进行分析,并与ANSYS中蒙特卡罗法计算结果进行比较.分析结果表明,响应面法具有足够高的精度; 张力结构拉索松弛失效可靠指标不符合规范GB 50068—2001要求,是控制结构失效的主要形式.

In order to better understand the reliability of cable-strut tensile structures under limit states, the Response Surface Method(RSM)was employed to analyze the reliabilities of cable-strut tensile structures, and results by RSM were compared with the ones by Monte Carlo Method in software ANSYS. The results show that RSM has a high enough precision in the calculation of reliability for cable-strut tensile structures, and the reliability index of stress relaxation in cable cannot meet the requirement stipulated by GB 50068—2001, which will become a primary failure mode for consideration in practical application.

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