Experimental study of a highway bridge with shape memory alloy restrainers focusing on the mitigation of unseating and pounding  

作　　者：Guo, Anxin  Zhao, Qingjie  Li, Hui 

机构地区：[1] School of Civil Engineering, Harbin Institute of Technology, Harbin 150090, China [2] School of Civil Engineering, the 2nd Campus, Harbin Institute of Technology, P.O. Box 2537, Harbin 150090, China

出　　处：《Earthquake Engineering and Engineering Vibration》2012年第2期195-204,共10页地震工程与工程振动（英文刊）

基　　金：Earthquake Engineering and Engineering Vibration Laboratory Foundation,Institute of Engineering Mechanics, China Earthquake Administration Under Grant No.2009a1;the National Natural Science Foundation of China under Grant No.50878071

摘　　要：This paper presents an experimental study to investigate the performance of shape memory alloy(SMA) restrainers for mitigating the pounding and unseating of highway bridges when subjected to seismic excitations.Mechanical property tests of the SMA wire used in the restrainers are conducted first to understand the pseudo-elastic characteristics of the material.Then,a series of shaking table tests are carried out on a highway bridge model.The structural responses of the highway bridge model equipped with SMA restrainers,installed in the form of deck-deck and deck-pile connections,are analyzed and compared with the uncontrolled structures.The test results of this study indicate that the SMA restrainers are not only effective in preventing unseating but also in suppressing the seismic-induced pounding of the highway bridge model used in this study.This paper presents an experimental study to investigate the performance of shape memory alloy(SMA) restrainers for mitigating the pounding and unseating of highway bridges when subjected to seismic excitations.Mechanical property tests of the SMA wire used in the restrainers are conducted first to understand the pseudo-elastic characteristics of the material.Then,a series of shaking table tests are carried out on a highway bridge model.The structural responses of the highway bridge model equipped with SMA restrainers,installed in the form of deck-deck and deck-pile connections,are analyzed and compared with the uncontrolled structures.The test results of this study indicate that the SMA restrainers are not only effective in preventing unseating but also in suppressing the seismic-induced pounding of the highway bridge model used in this study.

关 键 词：shape memory alloy RESTRAINER unseating POUNDING highway bridge 

分 类 号：U442.55[建筑科学—桥梁与隧道工程]