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首页> 外文期刊>Bulletin of earthquake engineering >A probabilistic strategy for seismic assessment and FRP retrofitting of existing bridges
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A probabilistic strategy for seismic assessment and FRP retrofitting of existing bridges

机译：现有桥梁地震评估和FRP改造的概率策略

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摘要

This study proposes a holistic probabilistic framework to evaluate existing road and railway bridges after an earthquake by means of analytical fragility curves and visual inspections. Although visual inspections are affected by uncertainties, they are usually considered in a deterministic way, while in this work they are taken into account in a probabilistic point manner. Moreover, extra focus is given on retrofitting interventions by means of Fiber Reinforced Polymer materials and their costs. A probabilistic methodology is formed to evaluate possible standardized interventions on existing bridges after a seismic event. The proposed framework, consists of six basic steps and it is applied on a reinforced concrete bridge case study, which is a common structural typology in Italian roadway infrastructural networks. The main aim is to provide useful information to public authorities in order to decide whether or not they should allow traffic over the bridge and whether to repair immediately earthquake-damaged bridges. The outcomes of this framework can be used to improve procedures used for the seismic assessment of the whole road and railway networks to better plan emergency, post-emergency actions and define a general priority for an optimal budget allocation.
机译：这项研究提出了一个整体概率框架，通过分析易碎性曲线和目视检查来评估地震后现有的公路和铁路桥梁。尽管外观检查受不确定性的影响，但通常以确定性的方式进行考虑，而在这项工作中，它们以概率点的方式考虑在内。此外，通过纤维增强聚合物材料及其成本对改造措施给予了更多关注。形成概率方法以评估地震事件后对现有桥梁可能的标准化干预。拟议的框架包括六个基本步骤，并应用于钢筋混凝土桥梁案例研究，这是意大利巷道基础设施网络中常见的结构类型。其主要目的是向公共当局提供有用的信息，以决定它们是否应允许该桥上的车辆通行，以及是否应立即修理受地震破坏的桥梁。该框架的结果可用于改进用于整个道路和铁路网络的地震评估的程序，以更好地计划紧急情况，紧急情况后的行动并确定最佳预算分配的总体优先级。

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