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Updated probabilistic seismic performance assessment framework for ordinary standard bridges in California

机译：加利福尼亚普通标准桥梁的更新概率地震性能评估框架

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With the recent advent of performance-based earthquake engineering (PBEE) in seismic design practice of buildings serving as an impetus for this work, initial steps toward a fully probabilistic performance-based seismic design (PBSD) method for bridges, a less trodden area in terms of PBEE applications, are taken herein by assembling an updated probabilistic seismic performance assessment framework for ordinary standard bridges (OSBs) in California. The framework stems from the comprehensive PBEE methodology developed under the auspices of the Pacific Earthquake Engineering Research (PEER) Center. With performance measures defined as the risk associated with the exceedance of a set of damage/limit-states (LSs), improvements from the state-of-the-art literature on the PEER PBEE methodology are incorporated, including (1) introduction of an improved intensity measure - average spectral acceleration over a period range, (2) conditional mean spectrum-based hazard-consistent and site-specific ground motion selection, (3) introduction of material strain-based engineering demand parameters, (4) use of practical LSs pertinent to seismic damage evaluation of bridges, and (5) development of strain-based normalized fragility functions for the considered LSs. The updated framework, assembled herein using a specific testbed California OSB as a case in point, is general within its scope and is applicable to the gamut of design situations representative of the population of OSBs in California. With the PEER PBEE framework implemented for OSBs in an updated and rigorous form, the groundwork for utilizing this framework in the context of PBSD of such bridges is laid.
机译：随着近期基于绩效的地震工程（PBEE）的地震设计实践中出现的建筑物的抗震设计实践，作为这项工作的推动力，初步迈出了桥梁全部概率性能的地震设计（PBSD）方法，桥梁较少PBEE应用程序的条款是通过在加利福尼亚州的普通标准桥梁（OSB）组装更新的概率地震性能评估框架。该框架源于在太平洋地震工程研究（同行）中心的主持下开发的综合PBEE方法。随着与超出一系列损害/限制（LSS）相关的风险定义的性能措施，纳入了对等PBEE方法的最先进文献的改进，包括（1）引入改进的强度测量 - 平均频谱加速度在周期范围内，（2）条件平均频谱危险 - 一致和现场特定地面运动选择，（3）引入基于材料应变的工程需求参数，（4）使用实用与桥梁的抗震损伤评估有关的LSS，（5）所考虑的LSS的基于应变的标准化脆弱功能的开发。使用特定测试平加州OSB的更新的框架作为一种情况，在其范围内将是一般的，并且适用于代表加利福尼亚州OSB群体的设计情况的曲目。对于以更新和严格的形式实施OSB的对等体PBEE框架，奠定了在这些桥梁的PBSD的上下文中利用该框架的基础。

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