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

该项目的主要目标是对目前使用的电缆约束器改造系统进行建模，广泛研究它们对公路桥梁对地震激励的反应的影响，并调查可能的设计改进，以便在未来的地震中将桥梁的结构破坏降到最低或消除即将开发的分析模型将用于研究改造桥梁的反应，包括白水过桥（56-57页）对最近棕榈泉地震的反应。这座桥经过改造，但在1986年棕榈泉地震中遭到了一些破坏。还将分析受洛马普列塔地震激发的具有代表性的索约束结构。主要任务将是在最近开发的模型中纳入改造机制，以表示地震期间桥面和桥台之间的影响，并修改NEABS程序，以便它可以用于分析一般类型的改造桥梁。​该项目与加州交通部（CALTRANS）的项目协调，实际上由内华达州交通部提供资金。

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.