Modelling interactions between multiple bridge deterioration mechanisms

Modelling interactions between multiple bridge deterioration mechanisms
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对多种桥梁劣化机制之间的相互作用进行建模

DOI:
10.1016/j.engstruct.2020.111059
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发表时间:
2020
影响因子:
5.5
通讯作者:
Calvert G
Calvert G
中科院分区:
工程技术2区
文献类型:
--
作者:
Calvert G

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桥梁资产管理者的任务是由交通网络的利益相关者制定有效的维护策略。维护策略的任何陈述都需要对全寿命周期成本(WLCC)的后果进行估计,这取决于准确的劣化模型。桥梁退化以前已被证明在文献中表现出非恒定的行为。然而,工业数据通常限制劣化模型使用指数分布。在这项研究中,一个动态贝叶斯网络(DBN)被提出来模拟桥梁退化,它考虑了不同的缺陷机制的启动和机制之间的相互作用。该模型使用指数分布进行参数化,但是通过考虑缺陷相互作用,非恒定劣化行为仍然可以被纳入模型中。恶化的指向,位移块工作旁边的剥落,空心和砌体开裂的存在下被认为是缺陷机制,与砌体铁路桥在英国作为一个案例研究。
Bridge asset managers are tasked with developing effective maintenance strategies by the stakeholders of transportation networks. Any presentation of maintenance strategies requires an estimate of the consequence on the Whole Life Cycle Cost (WLCC), which is contingent on an accurate deterioration model. Bridge deterioration has previously been demonstrated to exhibit non-constant behaviour in literature. However, industrial data typically constrains deterioration models to use exponential distributions. In this study, a Dynamic Bayesian Network (DBN) is proposed to model bridge deterioration, which considers the initiation of different defect mechanisms and the interactions between the mechanisms. The model is parameterised using an exponential distribution, however through the consideration of defect interactions, non-constant deterioration behaviour can still be incorporated in the model. The deterioration of pointing, displacement of block work alongside the presence of spalling, hollowness and masonry cracking are the defect mechanisms considered, with masonry railway bridges in the United Kingdom serving as a case study.
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