A STUDY ON VERIFICATION OF SEISMIC SAFETY OF ROAD BRIDGES BY USING ACCELERATION-DISPLACEMENT RESPONSE SPECTRUM

利用加速度-位移响应谱验证公路桥梁抗震安全性的研究

基本信息

批准号：
13650523
负责人：
HIRAO Hiyoshi
金额：
$ 2.18万
依托单位：
The University of Tokushima
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2001
资助国家：
日本
起止时间：
2001 至 2003
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-13650523/
关键词：
ACCELERATION-DISPLACEMENT RESPONSE SPECTRUM FORCE-SPLACEMENT-BASED SEISMIC DESIGN MODIFIED PARK-ANG'S DAMAGE INDEX DAMAGE CONTOROLED SUPECTRUM SINGLE COLUMN RC PIER PORTAL RIGID FRAME RC PIER LEVEL 2 SIMULATED EARTHQUAKE ROAD BRIDGE 修正Park

ACCELERATION-DISPLACEMENT RESPONSE SPECTRUM FORCE-SPLACEMENT-BASED SEISMIC DESIGN MODIFIED PARK-ANG'S DAMAGE INDEX DAMAGE CONTOROLED SUPECTRUM SINGLE COLUMN RC PIER PORTAL RIGID FRAME RC PIER LEVEL 2 SIMULATED EARTHQUAKE ROAD BRIDGE 修正Park

项目摘要

Objective of this study is to develop a force-displacement-based seismic design method of road bridges by using the acceleration-displacement response spectrum (hereafter referred to as the S_a-S_d spectrum) of SDOF systems. The main results obtained in this study are summarized as follows1. The S_a S_d spectrum is affected by the required value D_r of modified Park-Ang's damage index, and the value of ductility capacity μ_u and restoring force model of a SDOF system. Namely the increasing value of D_r and μ_u makes the spectral values of acceleration S_a and displacement S_d larger. Also the value of S_a and S_d of Bi-linear model becomes larger than that of Q-hyst model. The S_a value also gets larger as the soil becomes harder in Type II earthquake and softer in Type I earthquake, while the value of S_d increases as the soil gets softer in both the Types I and II earthquakes2. Regression equation of the spectra of S_a and S_d for each earthquake Type and soil Group can be derived with relatively high accuracy as the function of natural period T and ductility capacity μ_u by using the spectra of elastic acceleration response S_<ae> required yield strength ratio R_r and displacement ductility factor μ_d3. The force-displacement-based seismic design method for a single-column RC pier and portal rigid frame RC pier is proposed by use of the derived S_a S_d spectrum, and the qualitative difference in the design results of single-column RC piers, between the proposed method and the ductility design method of the Japanese Specifications, is compared. As a result it becomes clear that the proposed method requires more lateral capacity and more ductility capacity, and the proposed method is the safer design than the ductility design method

这项研究的目的是通过使用SDOF系统的加速度解散响应频谱（以下称为S_A-S_D频谱），开发一种基于力解析的道路桥的地震设计方法。本研究中获得的主要结果总结如下1。 S_A S_D频谱受修改公园损伤指数的所需值D_R的影响，以及延性能力μ_U和恢复SDOF系统的力模型的值。即，d_r和μ_U的增加值使加速度S_A和位移s_d的光谱值更大。同样，Bi-linear模型的S_A和S_D的值也比Q-HYST模型的值大。随着II型地震中的土壤变得越来越困难，S_A值也会变得更大，而I型地震中的土壤变得越来越柔和，而S_D的值随着土壤在I型和II型地震中的柔和而增加。对于每种地震类型的S_A和S_D的光谱的回归方程，可以通过使用弹性加速度响应S_E> SURPARE>所需的屈服强度比R_R R_R和移位型义务性因子μ_d3来得出相对高精度和自然周期T和延性能力μ_U的功能。通过使用派生的S_A S_D频谱，提出了针对单列RC码头和门户刚性框架RC码头的基于力 - 置换式的地震设计方法，并比较了单柱RC墩的设计结果，在提议的方法和日本规格的延展性设计方法之间的设计结果差异。结果，很明显，所提出的方法需要更多的侧向容量和更高的延展性能力，而所提出的方法比延展性设计方法更安全