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Seismic performance evaluation and retrofitting of existing highway bridges in British Columbia

不列颠哥伦比亚省现有公路桥梁的抗震性能评估和改造

基本信息

批准号：
419414-2011
负责人：
Alam, Shahria
金额：
$ 2.91万
依托单位：
University of British Columbia
依托单位国家：
加拿大
项目类别：
Collaborative Research and Development Grants
财政年份：
2013
资助国家：
加拿大
起止时间：
2013-01-01 至 2014-12-31
项目状态：
已结题

来源：
https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=531408
关键词：
Seismic performance evaluation retrofitting existing

项目摘要

Recent seismic events all over the world have shown the vulnerability of bridge structures during earthquakes. The west coast of Canada is considered the most seismic prone region. There has been limited research to date to evaluate the seismic vulnerability and viable retrofit strategies for the bridges that are common in British Columbia. There is a need for reliable methods for assessing the seismic vulnerability of existing bridges, particularly highway bridges having lifeline characters. S-Frame Software Inc is a world leading Software Company in structural engineering analysis and design where its S-Frame is capable to conduct both static and dynamic time-history analysis. In this project S-Frame will be utilized, which will be first equipped with several nonlinear hysteretic models for accurate seismic performance evaluation. The proposed research will focus on developing reliability-based seismic assessment for existing highway bridges in British Columbia and also bridges retrofitted with various alternatives. Fragility curves will be developed to assess the relative performance of existing bridges and retrofitted bridges considering several limit states. The development of reliable fragility curves would allow for accurate seismic risk assessment, bridge retrofit prioritization, post-earthquake emergency response. The bridge inventory, structural configuration, geometry, and properties of the bridges will be obtained from British Columbia Ministry of Transportation and Infrastructures.

最近世界各地的地震事件表明桥梁结构在地震中的脆弱性。加拿大西海岸被认为是地震最频繁的地区。迄今为止，评估不列颠哥伦比亚省常见桥梁的地震脆弱性和可行的改造策略的研究还很有限。需要可靠的方法来评估现有桥梁的地震脆弱性，特别是具有生命线特征的公路桥梁。 S-Frame Software Inc 是一家世界领先的结构工程分析和设计软件公司，其 S-Frame 能够进行静态和动态时程分析。该项目将采用S-Frame，它首先配备多个非线性滞回模型，用于精确的抗震性能评估。拟议的研究将侧重于对不列颠哥伦比亚省现有公路桥梁以及采用各种替代方案进行改造的桥梁进行基于可靠性的地震评估。将开发脆弱性曲线，以评估现有桥梁和改造桥梁考虑几种极限状态的相对性能。可靠的脆弱性曲线的开发将有助于准确的地震风险评估、桥梁改造优先顺序和震后应急响应。桥梁清单、结构配置、几何形状和特性将从不列颠哥伦比亚省交通和基础设施部获得。