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首页> 外文期刊>Journal of Zhejiang University. Science, A >A realistic resistance deterioration model for time-dependent reliability analysis of aging bridges
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A realistic resistance deterioration model for time-dependent reliability analysis of aging bridges

机译：老化桥梁时间依赖性可靠性分析的现实电阻劣化模型

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摘要

Bridge resistance and reliability may deteriorate with time due to aggressive environmental conditions and increasing road freight volumes, resulting in an increase of potential economic loss. This is thus a great concern to decision-makers managing the bridges’ continued future service. Reasonable models of bridge resistance and applied loads are the fundamentals of accurate estimation/prediction of a bridge’s serviceability. In this paper, a new model for resistance deterioration is proposed, which enables the non-increasing property and auto-correlation in the stochastic deterioration process to be incorporated. To facilitate the practical application of the model, methods to determine its parameters using obtained data on structural resistance are developed and illustrated through simple numerical examples. time-dependent reliability analysis is conducted using the proposed resistance deterioration model based on Monte Carlo simulation, and the effect of auto-correlation in the deterioration process on structural time-dependent reliability is investigated.
机译：由于积极的环境条件和道路货运量增加，桥梁抵抗和可靠性可能会随着时间的推移而恶化，导致潜在的经济损失增加。因此，这对管理桥梁持续未来的服务的决策者来说是一个很好的关注。合理的桥梁电阻模型是准确估计/预测桥梁可维护性的基础。在本文中，提出了一种用于电阻劣化的新模型，其使得在随机劣化过程中能够结合的不增加性能和自相关。为了便于模型的实际应用，通过简单的数值示例开发和说明使用所获得的结构性数据来确定其参数的方法。采用基于蒙特卡罗模拟的建议电阻劣化模型进行时间依赖性可靠性分析，研究了在结构时间依赖性的劣化过程中的自相关过程中的影响。

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