A Study of Development for Steel Bridge Piers by the Upgrading of a Pseudodynamic Tests

本研究旨在开发一种升级的钢结构静动力测试系统。为此，在分析和实验结果的基础上，提出了改进桥梁结构功能保存的各种讨论。1)反L型钢桥墩的抗震性能对于模拟悬臂和反L型钢桥墩的加筋截面试件，在桥墩顶部加与上部结构重量相对应的固定竖向荷载的条件下，通过增加重复水平位移进行了拟动力试验。阐明了倒L型桥墩的抗震性能（最大位移和剩余位移）。(2)隔震支座介绍了在具有高抗震性能的高延性钢桥墩中，采用隔震支座作为减小桥墩震后残余位移的方法之一。提出了将带有隔震支座的钢桥墩与主体材料和小构件分离的子结构伪动力试验体系。通过实验得到了主构件的响应，对其他构件的响应进行了数值求解。通过对实验系统整体的数值研究，讨论了该实验系统的正确性。

The present study is aimed at a developing of an upgrading pseododynamic testing system for steel structures. For this purpose, various discuss for improvement on the functional preservation of bridge structures are shown, based on analytical and experimental results.1) Seismic performance of inversed L shape steel bridge piersFor the specimen with stiffened cross section that modeled cantilever and inversed L shape bridge piers, by adding repetition horizontal displacement in the condition that the fixed vertical load that corresponds to the superstructure weight was added in the top of bridge pier, the Pseudodynamic tests were carried out. Seismic performanuces (maximum and residual displacement) for inversed L shape bridge piers were clarified.2) Seismic isolator bearingThe introduction of the seismic isolation bearing which was one of the methods for reducing residual displacement of the bridge pier after the earthquake end in high ductility steel bridge piers that have high earthquake performance was examined.3) Upgrading pseudodynamic testing systemSub structure pseudodynamic testing system that is carried out by separating the steel bridge piers with the seismic isolation bearings from the main part material and sub member is proposed. The responses of the main member are obtained experimentally and the other responses are solved numerically. The verification of that experiment system is discussed by numerical study for whole parts.