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首页> 外文期刊>Earthquake Engineering & Structural Dynamics >Multi-hazard upgrade decision making for critical infrastructure based on life-cycle cost criteria
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Multi-hazard upgrade decision making for critical infrastructure based on life-cycle cost criteria

机译：基于生命周期成本标准的关键基础设施的多危害升级决策

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摘要

The life-cycle cost can be regarded as a benchmark variable in decision making problems involving the retrofit and upgrading of existing structures. A critical infrastructure is often subjected to more than one hazard during its lifetime. Therefore, the problem of evaluating the life-cycle cost involves uncertainties in both loading and structural modeling parameters. The present study is a preliminary study aiming to calculate the expected life-cycle cost for a critical infrastructure subjected to more than one hazard in its service lifetime. A methodology is presented that takes into account both the uncertainty in the occurrence of future events due to different types of hazard and also the deterioration of the structure as a result of a series of events. In order to satisfy life safety conditions, the probability of exceeding the limit state of collapse is constrained to be smaller than an allowable threshold. Finally, the methodology is implemented in an illustrative numerical example which considers a structure subjected to both seismic hazard and blast hazard in both upgraded and non-upgraded configurations. It is demonstrated how expected life-cycle cost can be used as a criterion to distinguish between the two choices while satisfying the life safety constraint.
机译：在涉及改造和升级现有结构的决策问题中，生命周期成本可以视为基准变量。关键基础架构在其生命周期中经常遭受多种危害。因此，评估生命周期成本的问题涉及荷载和结构建模参数的不确定性。本研究是一项初步研究，旨在计算在使用寿命中遭受多种危害的关键基础设施的预期生命周期成本。提出了一种方法，该方法既考虑了由于不同类型的危害而导致的未来事件发生的不确定性，也考虑了一系列事件导致的结构恶化。为了满足生命安全条件，超过崩溃极限状态的概率被限制为小于允许阈值。最后，在说明性的数值示例中实施了该方法，该示例考虑了在升级和非升级配置下都遭受地震危险和爆炸危险的结构。证明了如何将预期的生命周期成本用作在满足生命安全约束的同时区分两种选择的标准。

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