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

拟动力试验升级钢桥墩开发研究

基本信息

批准号：
10555154
负责人：
USAMI Tsutomu
金额：
$ 8.19万
依托单位：
Nagoya University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B).
财政年份：
1998
资助国家：
日本
起止时间：
1998 至 2000
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-10555154/
关键词：
Pushover Analysis Local Buckling Cyclic Loading Seismic Performance Elasto-plastic Analysis Residual Displacement Seismic Isolation Bearing Steel Bridge Piers 橋梁システム耐震設計逆L型橋脚機能保持損傷度崩壊

项目摘要

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.

本研究旨在开发一种升级的钢结构拟动力试验系统。基于此目的，在分析和试验结果的基础上，对桥梁结构功能保护的改进进行了各种讨论。1）倒L形钢桥墩的抗震性能对于模拟悬臂和倒L形桥墩的加劲横截面试件，通过在上部结构顶部增加与上部结构重量相对应的固定竖向荷载的情况下，桥墩进行了拟动力试验。抗震性能2）隔震支座在具有高抗震性能的高延性钢桥墩中引入隔震支座是减小桥墩震后残余位移的一种方法拟动力试验系统的改进提出了子结构拟动力试验系统，该系统将带有隔震支座的钢桥墩从主体材料和子构件中分离出来。主要构件的响应是通过实验获得的，其他响应是通过数值求解的。通过对整个部件的数值研究，对实验系统的验证进行了讨论。