| 服役公路桥梁的时变可靠指标计算 |
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| 引用本文： | 索清辉, 钱永久. 服役公路桥梁的时变可靠指标计算[J]. 交通运输工程学报, 2006, 6(1): 69-71. |
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| 作者姓名： | 索清辉 钱永久 |
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| 作者单位： | 西南交通大学 土木工程学院, 四川 成都 610031 |
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| 基金项目： | 高等学校优秀青年教师教学科研奖励计划 |
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| 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。
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| 关 键 词： | 桥梁工程 抗力衰减 时变可靠指标 评估 |
| 文章编号： | 1671-1637(2006)01-0069-03 |
| 收稿时间： | 2005-07-04 |
| 修稿时间： | 2005-07-04 |
Time-Dependent Reliability Index Calculation of Existed Highway Bridge |
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| SUO Qing-hui, QIAN Yong-jiu. Time-Dependent Reliability Index Calculation of Existed Highway Bridge[J]. Journal of Traffic and Transportation Engineering, 2006, 6(1): 69-71. |
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| Authors: | SUO Qing-hui QIAN Yong-jiu |
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| Affiliation: | School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, Sichuan, China |
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| 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.1 fig,9 refs. |
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| Keywords: | bridge engineering resistance degradation time-dependent reliability index assessment |
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