| 基于可靠性的桥梁抗剪承载力临界寿命曲线 |
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| 引用本文： | 王松根,李松辉.基于可靠性的桥梁抗剪承载力临界寿命曲线[J].公路交通科技,2010,27(4). |
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| 作者姓名： | 王松根 李松辉 |
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| 作者单位： | 1. 交通运输部公路科学研究院,北京,100088
2. 山东科技大学,土木建筑学院,山东,青岛,266510 |
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| 基金项目： | 交通部科技攻关项目(2005353341190);;山东省交通科技项目(2005Y006);;山东省自然科学基金资助项目(Y2007F48) |
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| 摘 要： | 为建立基于可靠性的在役T形截面简支梁桥抗剪承载力临界寿命曲线,并提出相应的受剪承载力剩余寿命实用预测方法,以设计目标可靠指标降低0.5为受弯构件抗剪承载能力最低可靠指标。在引入抗力简单随机过程模型的基础上,通过计算不同评估基准期与最低可靠指标对应的构件抗力相对折减系数限值,建立了基于抗力折减系数限值的受弯构件抗剪承载能力临界寿命曲线和预测方法。最后,以某20 m简支T形梁桥为例进行抗剪承载力寿命预测,计算结果表明,本文提出的抗剪承载力寿命预测方法简单实用,与基于可靠度的在役桥梁承载能力剩余寿命预测方法是等效的,避免了寿命预测中复杂的可靠指标计算过程,可用于在役桥梁受弯构件抗剪承载力寿命预测。
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| 关 键 词： | 桥梁工程 临界寿命曲线 可靠性分析 T形梁桥 寿命预测 |
Reliability-based Critical Life Curve of Shear Capacity of Existing RC Bridges |
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| WANG Songgen,LI Songhui.Reliability-based Critical Life Curve of Shear Capacity of Existing RC Bridges[J].Journal of Highway and Transportation Research and Development,2010,27(4). |
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| Authors: | WANG Songgen LI Songhui |
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| Institution: | 1.Research Institute of Highway;Ministry of Transport;Beijing 100088;China;2.School of Civil Engineering;Shandong University of Science and Technology;Qingdao Shandong 266510;China |
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| Abstract: | In order to establish reliability-based critical life curve of shear capacity and develop a practical method to predict the corresponding remaining service life of shear capacity of RC T-section simple supported beam bridges,the designed target reliability index decreased by 0.5 was suggested to be the lowest reliability index of the beam.Based on the simple stochastic process model for resistance,the relative reduction coefficients corresponding to the adopted lowest reliability indexes for different asses... |
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| Keywords: | bridge engineering critical life curve reliability analysis T-beam bridge life prediction |
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