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Methodology for the development of bridge-specific fragility curves

机译：特定于桥梁的脆性曲线的开发方法

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A new methodology for the development of bridge-specific fragility curves is proposed with a view to improving the reliability of loss assessment in road networks and prioritising retrofit of the bridge stock. The key features of the proposed methodology are the explicit definition of critical limit state thresholds for individual bridge components, with consideration of the effect of varying geometry, material properties, reinforcement and loading patterns on the component capacity; the methodology also includes the quantification of uncertainty in capacity, demand and damage state definition. Advanced analysis methods and tools (nonlinear static analysis and incremental dynamic response history analysis) are used for bridge component capacity and demand estimation, while reduced sampling techniques are used for uncertainty treatment. Whereas uncertainty in both capacity and demand is estimated from nonlinear analysis of detailed inelastic models, in practical application to bridge stocks, the demand is estimated through a standard response spectrum analysis of a simplified elastic model of the bridge. The simplified methodology can be efficiently applied to a large number of bridges (with different characteristics) within a road network, by means of an ad hoc developed software involving the use of a generic (elastic) bridge model, which derives bridge-specific fragility curves. Copyright (c) 2016 John Wiley & Sons, Ltd.
机译：提出了一种开发桥梁专用易损性曲线的新方法，以期提高道路网络中损耗评估的可靠性，并优先考虑桥梁库存的翻新。所提出的方法的关键特征是，考虑到不同的几何形状，材料特性，钢筋和荷载模式对构件承载力的影响，明确定义了单个桥梁构件的临界极限状态阈值；该方法还包括对容量，需求和损坏状态定义的不确定性进行量化。先进的分析方法和工具（非线性静态分析和增量动态响应历史分析）用于桥梁组件的容量和需求估算，而简化的采样技术用于不确定性处理。尽管容量和需求的不确定性都是通过详细的非弹性模型的非线性分析来估计的，但在实际应用中，需要通过简化的弹性模型的标准响应谱分析来估计需求。通过使用涉及通用（弹性）桥梁模型的临时开发软件，简化的方法可以有效地应用于道路网络中的大量桥梁（具有不同特性），该模型可以得出桥梁特定的脆性曲线。版权所有（c）2016 John Wiley＆Sons，Ltd.

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