Evaluation of the Effects of Seismic Retrofitting on the Earthquake Response of Highway Bridges

本项目的主要目标是进行建模 在当前使用的使用缆索限制器的改进系统中， 广泛研究其对高速公路响应的影响 桥梁的地震激励和调查 可能改进其设计， 今后将尽量减少或消除对桥梁的损害 地震 将开发的分析模型将用于 研究改造桥梁的反应，包括 白水立交桥（Whitewater Overcrossing）56-57） 棕榈泉地震 这座桥被翻新了 但在1986年的棕榈泉飓风中受到了一些破坏 地震 代表性的缆索约束结构， 对洛马普列塔地震感到兴奋的人也将 分析了 主要任务将包括改造 在最近开发的模型中， 桥面与桥台之间的冲击， 地震和修改程序NEABS，使其 可用于一般型改装分析 桥梁. 该项目与加州的计划相协调 交通部（CALTRANS）和实际资助 由内华达州交通部负责。

The primary objectives of this project are to conduct modeling of currently used retrofit systems using cable restrainer, extensive studies of their effects on the response of highway bridges to earthquake excitations and the investigation of possible improvements of their design so that structural damage to bridges will be minimized or eliminated in future earthquakes The analytical models that will be developed will be used to study the response of retrofitted bridges including the response of the Whitewater Overcrossing (Br. 56-57) to the recent Palm Springs earthquake. The bridge was retrofitted but suffered some damage during the 1986 Palm Springs earthquake. Representative cable-restrained structures that were excited by the Loma Prieta earthquake will also be analyzed. The primary tasks will be the inclusion of retrofit mechanisms in recently developed models to represent the impact between the bridge deck and the abutments during earthquakes and the modification of program NEABS so that it can be used for the analysis of general type retrofitted bridges. This project is coordinated with the program of the California Department of Transportation (CALTRANS) and practically funded by the Nevada Department of Transportation.