Journal of South China University of Technology(Natural Science Edition) ›› 2012, Vol. 40 ›› Issue (7): 8-14.

• Traffic & Transportation Engineering • Previous Articles     Next Articles

Probability Analysis of Shrinkage and Creep Effect of Prestressed Concrete Cable-Stayed Bridges

Su Cheng1,2  Chen Zhao-shuan1  Xu Yu-feng1,2  Pang Jian1   

  1. 1. School of Civil Engineering and Transportation,South China University of Technology,Guangzhou 510640,Guangdong,China;2. State Key Laboratory of Subtropical Building Science,South China University of Technology,Guangzhou 510640,Guangdong,China
  • Received:2011-10-13 Revised:2012-03-30 Online:2012-07-25 Published:2012-06-01
  • Contact: 苏成(1968-) ，男，教授，博士生导师，主要从事结构可靠度等研究． E-mail:cvchsu@scut.edu.cn
  • About author:苏成(1968-) ，男，教授，博士生导师，主要从事结构可靠度等研究．
  • Supported by:

    国家自然科学基金资助项目( 51078150) ; 华南理工大学亚热带建筑科学国家重点实验室基金资助项目( 2008ZC21)

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Abstract:

As the commonly-used stochastic analysis methods such as the perturbation stochastic finite element method and the Monte Carlo method are inapplicable in analyzing the random shrinkage and creep effect of the prestressed cable-stayed concrete bridge subjected to a large number of uncertain factors,a response surface-Monte Carlo method ( RSMCM) that combines the response surface fitting and the Monte Carlo simulation is proposed. By the RSMCM,the standard deviation of the shrinkage and creep effect varying with each parameter is obtained,and the corresponding significance of each parameter to the effect is evaluated. Then,by introducing the concept of interval estimation,the confidence intervals of the shrinkage and creep effect corresponding to different confidence degrees are determined based on the stochastic analysis. The proposed method has been applied to the newly-built Ganzhuxi Bridge on the South Circular Highway in Guangzhou,China,with its feasibility being verified.

Key words: prestressed concrete cable-stayed bridge, shrinkage, creep, probability analysis, response surface, Monte Carlo method