桥梁结构时变可靠度计算的新方法

叶新一, 王草, 李全旺

叶新一, 王草, 李全旺. 桥梁结构时变可靠度计算的新方法[J]. 工程力学, 2018, 35(11): 86-91. DOI: 10.6052/j.issn.1000-4750.2017.09.0667
引用本文: 叶新一, 王草, 李全旺. 桥梁结构时变可靠度计算的新方法[J]. 工程力学, 2018, 35(11): 86-91. DOI: 10.6052/j.issn.1000-4750.2017.09.0667
YE Xin-yi, WANG Cao, LI Quan-wang. NEW METHOD FOR CALCULATION OF TIME-DEPENDENT RELIABILITY OF RC BRIDGES[J]. Engineering Mechanics, 2018, 35(11): 86-91. DOI: 10.6052/j.issn.1000-4750.2017.09.0667
Citation: YE Xin-yi, WANG Cao, LI Quan-wang. NEW METHOD FOR CALCULATION OF TIME-DEPENDENT RELIABILITY OF RC BRIDGES[J]. Engineering Mechanics, 2018, 35(11): 86-91. DOI: 10.6052/j.issn.1000-4750.2017.09.0667

桥梁结构时变可靠度计算的新方法

基金项目: 国家自然科学基金项目(51778337)
详细信息
    作者简介:

    叶新一(1993-),男,广东人,硕士生,主要从事结构耐久性研究(E-mail:ye-xy16@mails.tsinghua.edu.cn);王草(1993-),男,江苏人,博士生,主要从事结构可靠度研究(E-mail:cao.wang@sydney.edu.au).

    通讯作者:

    李全旺(1975-),男,天津人,副教授,博士,主要从事结构可靠度研究(E-mail:li_quanwang@tsinghua.edu.cn).

  • 中图分类号: U441+.4

NEW METHOD FOR CALCULATION OF TIME-DEPENDENT RELIABILITY OF RC BRIDGES

  • 摘要: 为提高桥梁结构时变可靠度的计算效率,该文提出了新的计算方法。该方法基于结构时变可靠度分析的基本理论,利用Taylor级数展开,将可靠度计算从传统的积分运算形式转换为代数运算的形式,从而简化计算过程,提高计算效率。为了考虑桥梁初始承载力和衰减过程的不确定性,该文基于全概率方法,给出了计算劣化结构时变可靠度的显式公式。通过将该文方法应用于某钢筋混凝土桥梁进行时变可靠度分析,并与Monte Carlo模拟方法进行对比,表明了该文方法的准确性和高效性。
    Abstract: A new method was proposed to improve the calculation efficiency of time-dependent reliability analysis for bridges. Based on the basic theory of structural reliability, the proposed method utilizes the Taylor expansion to simplify the traditional formula in an integration expression as a new formula in an algebraic expression, which essentially improves the calculation efficiency. In order to consider the uncertainties associated with the initial resistance and the degradation process, an explicit formula for time-dependent reliability analysis was also presented using a total probabilistic theorem. The proposed method was applied to the time-dependent reliability analysis of an RC bridge, and the results were compared with that associated with Monte Carlo simulation method to demonstrate the accuracy and high efficiency of the new method.
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出版历程
  • 收稿日期:  2017-08-31
  • 修回日期:  2018-01-03
  • 刊出日期:  2018-11-28

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