服役公路桥梁的时变可靠指标计算

索清辉; 钱永久

服役公路桥梁的时变可靠指标计算

西南交通大学土木工程学院, 四川成都 610031

基金项目:

教育部优秀青年教师教学科研奖励计划项目 A0110719950102

详细信息

作者简介:
索清辉(1975-), 男, 山东滨州人, 西南交通大学工学博士研究生, 从事桥梁结构可靠性研究

中图分类号: U441
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- 被引次数: 0
出版历程
- 收稿日期: 2005-07-04
- 刊出日期: 2006-03-25

Time-Dependent Reliability Index Calculation of Existed Highway Bridge

School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, Sichuan, China

More Information

Author Bio:
SUO Qing-hui(1975-), male, doctoral student, 86-28-66372734, suoqinghui@163.com

摘要

摘要: 为了对服役结构的可靠性进行正确评估, 必须考虑时间变化的影响, 将结构服役时间离散为若干个时间点, 利用各个时间点上随机的结构抗力和荷载效应, 给出服役结构时变可靠指标简化计算公式, 分析抗力衰减模式、可变荷载增加大趋势以及服役时间对可靠指标的影响。分析结果表明: 在结构抗力和荷载效应保持不变情况下, 随着服役时间的增长, 结构的可靠指标降低, 结构可靠指标的变化规律因抗力衰减模式和荷载增大趋势的不同而有差异。
- 桥梁工程 /
- 抗力衰减 /
- 时变可靠指标 /
- 评估
Abstract: In order to effectively evaluate existed bridge reliability, the effect of bridge service time on bridge reliability was considered, some simplified formulas for calculating bridge reliability index were deduced based on the dispersed stochastic resistance and load effect of bridge, the effects of its resistance degradation model, load increasing tendency and service life on bridge reliability index were studied.Calculation result shows that bridge reliability index decreases with the increase of bridge service life, and it is sensitive to the resistance degradation mode and load increasing tendency of bridge.
- bridge engineering /
- resistance degradation /
- time-dependent reliability index /
- assessment

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图 1 时变可靠指标

Figure 1. Time-dependent Reliability Index

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参考文献(9)

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