Application of buckling-restrained braces in the seismic control of suspension bridges  

作　　者：Long Lu 

机构地区：[1]College of Environment and Civil Engineering,Chengdu University of Technology,Chengdu 610059,China

出　　处：《Earthquake Engineering and Engineering Vibration》2022年第2期543-557,共15页地震工程与工程振动（英文刊）

基　　金：supported by Scientific Research Start Foundation of Chengdu University of Technology(No.10900-KYQD-06455).

摘　　要：Buckling-restrained braces(BRBs)are widely used to improve the seismic performance of buildings.This paper aims to introduce BRBs to suspension bridges and assess the seismic performance of bridges with BRBs.Taking the Dadu River Bridge as a case study,an FEA model of the bridge is established,and different seismic measures(BRBs between the deck and the tower,BRBs at the middle of the span to replace the inclined suspenders to connect the deck and the main cables,fluid viscous dampers(FVDs)between the deck and the tower,the combination of BRBs to replace the inclined suspenders as well as FVDs between the deck and the tower)are applied to the suspension bridge.The influence of the parameters of BRBs on the seismic response of the suspension bridge is studied,and the performance of the bridge with BRBs is compared with that of the bridge with FVDs.The results indicate that the use of BRBs in place of the inclined suspenders is beneficial to reduce the displacement of the deck and limit the shear force and bending moment of the tower.The seismic performance of the suspension bridge with BRBs and FVDs is better than that of the bridge with BRBs or FVDs.Therefore,the application of BRBs is a feasible method to improve the seismic performance of the suspension bridge.

关 键 词：buckling-restrained braces fluid viscous dampers suspension bridge seismic response EARTHQUAKE 

分 类 号：U448.25[建筑科学—桥梁与隧道工程]