A Study of Seismic Design Methods for Steel Structures installed Scarifying Members with functions

钢结构设置功能松土构件抗震设计方法研究

• 批准号: 15360236
• 负责人: USAMI Tsutomu
• 金额: $ 9.28万
• 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: 2003
• 资助国家: 日本
• 起止时间: 2003 至 2005
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-15360236/
• 关键词: Steel Structure; local buckling; seismic control; seismic performance; elasto-plastic analysis; buckling-restrained brace; seismic response analysis; earthauake-resistant design

In this study the employment of buckling-restrained braces (BRBs) as energy dissipation dampers is attempted for seismic performance upgrading of steel arch bridges and the effectiveness of BRBs to protect structures against strong earthquakes is numerically studied. With buckling restrained, BRB members can provide stable energy dissipation capacity and thus damage of the whole structure under major earthquakes can be mitigated. Cyclic behavior of such members is addressd with a numerical simulation model, and a strength design method for BRBs is proposed. BRBs are then placed at certain locations on the example steel arch bridge to replace some normal members with two schemes, and the effect of the two installation schemes of BRBs for seismic upgrading is investigated by non-linear time-history analysis under various ground motions representing major earthquake events. Compared with the seismic behavior of the original structure without BRBs, satisfactory seismic performance is seen in the upgraded models, which clarifies the effectiveness of the proposed upgrading method and it can serve as an efficient solution for earthquake-resistant new designs and retrofit of existing steel arch bridges.

本文尝试采用防屈曲支撑作为耗能阻尼器来提高钢拱桥的抗震性能，并对防屈曲支撑在强震作用下的减震效果进行了数值研究。屈曲约束后，防屈曲支撑构件能够提供稳定的耗能能力，从而减轻大震作用下结构的破坏。通过数值模拟研究了该类构件的循环性能，提出了防屈曲支撑的强度设计方法。然后将防屈曲支撑放置在一定的位置上的例子钢拱桥，以取代一些正常的成员与两个方案，和效果的两个安装方案的防屈曲支撑的抗震升级进行了研究的非线性时程分析下的各种地面运动代表主要地震事件。与未加防屈曲支撑的原结构的抗震性能对比表明，加固后的模型具有良好的抗震性能，说明了该加固方法的有效性，可为既有钢拱桥的抗震设计和加固提供有效的解决方案。

项目成果

Demand of Seismic Brace Dampers Installed in Steel Arch Bridges

• DOI: 10.11532/proee2005a.28.136
• 发表时间: 2005
• 作者: H. Ge;K. Hioki;T. Usami

鋼アーチ橋に設置した座屈拘束ブレースの応答値

钢拱桥安装屈曲约束支撑的响应值

• 发表时间: 2005
• 期刊: 土木学会地震工学論文集 第28巻
• 作者: 葛漢彬;日沖堅治;宇佐美勉
• 通讯作者: 宇佐美勉

A proposal on seismic performance evaluation procedure for steel bridges - Applicability of displacement-based evaluation method

钢桥抗震性能评价程序的建议——基于位移的评价方法的适用性

• 发表时间: 2005
• 期刊: Bridge and Foundation
• 作者: Hanbin Ge;Tsutomu Usami;Zhihao Lu
• 通讯作者: Zhihao Lu

二重鋼管型座屈拘束ブレースの繰り返し弾塑性挙動

双钢管屈曲约束支撑的循环弹塑性行为

• 发表时间: 2004
• 期刊: 土木学会構造工学論文集 Vol.50A
• 作者: 加藤基規;葛西昭;馬翔;宇佐美勉
• 通讯作者: 宇佐美勉

制震ダンパーとしての座屈拘束ブレースの要求性能

屈曲约束支撑作为地震阻尼器所需的性能

• 发表时间: 2004
• 期刊: 土木学会構造工学論文集 Vol.50A
• 作者: 宇佐美勉;加藤規;葛西昭
• 通讯作者: 葛西昭