华南理工大学学报(自然科学版) ›› 2008, Vol. 36 ›› Issue (10): 12-15,36.

• 土木建筑工程 • 上一篇    下一篇

考虑验证荷载的既有结构可靠度计算

黄炎生 邓浩 李涛   

  1. 华南理工大学 土木工程系, 广东 广州 510640
  • 收稿日期:2007-10-17 修回日期:2008-04-02 出版日期:2008-10-25 发布日期:2008-10-25
  • 通信作者: 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
  • 作者简介: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.
  • 基金资助:

    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)

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)

摘要: 既有结构的可靠度与抗力衰减、抗力后验分布、活荷载取值有密切的关系.文中借助现行荷载规范活荷载的分布函数,采用极大似然估计法,推导了指数型抗力衰减函数的参数计算公式和验证荷载下的抗力后验分布函数计算公式.在综合考虑抗力衰减、抗力后验分布与活荷载取值3个因素的情况下,选取线性功能函数和非线性功能函数计算了恒载和活载共同作用下的可靠度.计算结果表明,影响既有结构可靠度的3个主要因素中,其显著性程度按照由高到低的次序是:抗力衰减、抗力后验分布、活荷载取值(与目标使用期有关).

关键词: 既有结构, 可靠度, 验证荷载, 抗力衰减, 活荷载

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