| Summary: | 碩士 === 臺灣大學 === 土木工程學研究所 === 95 === The purpose of this thesis was to study responses of bridges with sliding rubber bearings and restrainers or fluid viscous dampers under earthquakes. In this study, three earthquake time histories corresponding to the design spectrum were applied to nonlinear dynamic analysis of the structure. Subjects were the beam’s displacement (relative to the top of the column) and the force taken by the substructure. Variables used included period of structures, safety factors and gap of restrainers, damping exponent and coefficient of fluid viscous dampers. Four models were tested to study the effect of different variables on the behavior of a bridge with sliding rubber bearings and unseating prevention devices. Besides, the study also proposed simple design procedures for restrainers and fluid viscous dampers. Finally, collision between two superstructures was simulated in order to investigate if collision can effectively control the beam’s displacement (relative to the top of the column).
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