高震区BRB双幅刚构桥减震性能设计研究  

Design and Research on Shock Absorption Performance of BRB Double-Amplitude Rigid Frame Bridge in High Seismic Areas

作　　者：赵文斌 武维宏 胡焱文 王志贤 李熙同 ZHAO Wen-bin;WU Wei-hong;HU Yan-wen;WANG Zhi-xian;LI Xi-tong(Gansu Provincial Transportation Planning Survey and Design Institute Co.Ltd.,Lanzhou 730030,China)

机构地区：[1]甘肃省交通规划勘察设计院股份有限公司,兰州730030

出　　处：《工程建设与设计》2024年第23期122-126,共5页Construction & Design for Engineering

基　　金：甘肃省交通运输厅揭榜挂帅制科研项目(202102)。

摘　　要：为研究双幅连续刚构桥横桥向设置BRB金属消能器后对桥梁减震性能的影响,建立全桥有限元模型,采用非线性时程法,选取了6组BRB金属消能器、4种不同的安装高度、5个不同的交叉角度以及4个不同的安装组数对桥梁减震性能进行了研究。结果表明:双幅连续刚构桥横桥向设置BRB金属消能器能够有效降低桥墩内力及墩顶位移;横向交叉设置阻尼器时,水平交叉对减震效果影响明显,水平夹角45°时效果最佳;单组金属消能器安装在墩顶减震效果最佳;当设计多组消能器时,2组减震效果最佳。In order to study the influence of BRB metal energy dissipators on the damping performance of a double-amplitude continuous rigid frame bridge,a full-bridge finite element model was established.Six groups of BRB metal energy dissipators,four different installation heights,five different cross angles and four different installation groups were selected to study the damping performance of the bridge by using nonlinear time history method.The results show that BRB metal energy dissipators can effectively reduce the internal force and the displacement of pier top of the two-amplitude continuous rigid frame bridge.When the damper is set horizontally,the effect of horizontal cross is obvious,and the effect is best when the horizontal Angle is 45°.The single metal energy dissipator installed at the top of the pier has the best damping effect.When designing multiple groups of energy dissipators,two groups have the best damping effect.

关 键 词：连续刚构 BRB金属消能器 地震反应 有限元分析 

分 类 号：U442.55[建筑科学—桥梁与隧道工程] U448.23[交通运输工程—道路与铁道工程]