Journal of South China University of Technology (Natural Science Edition) ›› 2008, Vol. 36 ›› Issue (10): 12-15,36.

• Architecture & Civil Engineering • Previous Articles     Next Articles

Reliability Calculation of Existing Structure Under Proof Load

Huang Yan-sheng  Deng Hao  Li Tao   

  1. Department of Civil Engineering, South China University of Technology, Guangzhou 510640, Guangdong, China
  • Received:2007-10-17 Revised:2008-04-02 Online:2008-10-25 Published:2008-10-25
  • Contact: 黄炎生（1963-），男，博士，教授，主要从事结构分析可视化、既有结构可靠性评估研究． E-mail:cvyhuang@scut．edu．cn
  • About author:黄炎生（1963-），男，博士，教授，主要从事结构分析可视化、既有结构可靠性评估研究．
  • Supported by:

    广东省亚热带建筑技术公共实验室开放式基金资助项目（2005A60501001）

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Abstract:

The reliability of an existing structure mainly depends on three factors, namely, the resistance degradation, the resistance posterior distribution and the live load. In this paper, according to the distribution function of live load presented by the existing load code and by using the maximum likelihood estimation method, the computational formulae respectively for the parameters of the exponential resistance degradation function and for the resistion of the above-mentioned three factors, the reliabilities of the structure under dead and live loads are respectively calculated with both linear and nonlinear performance functions. The results indicate that the three factors affect the reliability in the order （from the highest to the lowest） of resistance degradation, resistance posteriori distribution function and live load that is related to the goal service life.

Key words: existing structure, reliability, proof load, resistance degradation, live load