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.

在这项研究中，尝试使用屈曲约束支撑（BRB）作为能量耗散阻尼器来提升钢拱桥的抗震性能，并数值研究了 BRB 保护结构免受强震影响的有效性。通过抑制屈曲，BRB构件可以提供稳定的耗能能力，从而减轻大地震下整个结构的损坏。通过数值模拟模型解决了此类构件的循环行为，并提出了 BRB 的强度设计方法。然后在实例钢拱桥的某些位置放置BRB，以两种方案替代部分普通构件，并通过代表重大地震事件的各种地面运动的非线性时程分析研究两种BRB安装方案对抗震升级的效果。与没有BRB的原始结构的抗震性能相比，升级后的模型具有令人满意的抗震性能，这说明了所提出的升级方法的有效性，并且可以作为现有钢拱桥的抗震新设计和改造的有效解决方案。

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