The Whittier Narrows Earthquake Freeway Bridges: Performance, Analysis and Repair

惠蒂尔海峡地震对高速公路桥梁的破坏 1987年10月1日是最重要的方面之一， 设计用于地震横向的工程结构的损坏 载荷 特别重要的是， I-605/I-5分离器，该分离器在 地震，并在当时危险地接近崩溃， 高速公路交通最繁忙，生命损失将有 广泛。 该研究项目旨在研究 惠蒂尔海峡地震中的高速公路桥梁 研究 包括五个阶段：观测损害评估、部件 强度和变形分析，动力分析选定 桥梁结构，评估和评价建议 和优先进行改造。 的意图 研究的目的是从强调的经验教训中获得最大的利益 由桥梁在地震中损坏的形式改进 了解现有桥梁结构的脆弱性 地震破坏，校准和评估的分析 桥梁结构地震反应分析技术， 以及改进技术的开发和评估， 降低高速公路桥梁的地震风险。

Damage to the freeway bridges in the Whittier Narrows earthquake of October 1, 1987 was one of the most significant aspects of damage to engineered structures designed for seismic lateral loads. Of particular importance was the performance of the I-605/I-5 separator, which was extensively damaged during the earthquake and came perilously close to collapse at a time when freeway traffic was at its heaviest and loss of life would have been extensive. The research project is directed to a study of the performance of freeway bridges in the Whittier Narrows earthquake. The research involves five stages: observed damage assessment, component strength and deformation analysis, dynamic analysis of selected bridge structures, recommendations on assessment and evaluation and prioritization for retrofitting. The intention of the research is to obtain maximum benefit from the lessons emphasized by bridge damage in the earthquake in the form of improved understanding of the vulnerability of existing bridge structures to seismic damage, calibration and assessment of analytical techniques for analysis of seismic response of bridge structures, and in the development and assessment of retrofit techniques to reduce the seismic risk of freeway bridges.