摘要
为充分利用活动墩抗震潜能,减小固定墩墩底内力响应,提高连续梁桥整体抗震性能,提出了一种以惯性力激活(Inertial Force Activation,IFA)的减震装置。该装置构造简单,维护方便。以某7跨连续梁桥为例,进行IFA装置工作原理及减震效果的研究,并与速度锁定(Lock-up)装置进行对比。研究结果表明,2种锁定装置均可起到有效利用连续梁桥整体抗震潜能的作用,IFA装置的工程环境适用性更强。两者发挥作用引起的整桥地震响应变化不仅受装置连接刚度的影响,还与地震波频谱特性有关。
An inertial force activation(IFA)vibration absorption device was proposed to make full use of the seismic potentiality of the sliding piers,to reduce the bottom force response of the f ixed pier and to improve the overall seismic resistance performance of continuous girder bridge.The IFA device is simple in structure and convenient for maintenance.Based on a seven-span continuous girder bridge,the working principle of the IFA device and its vibration absorption effect were studied and compared with the Lock-up device.The results show that both IFA device and Lock-up device can effectively use the whole seismic potentiality of continuous girder bridge.The adaptability of IFA device to engineering environment is stronger.The change of bridge seismic responses caused by each of locking devices is not only affected by the connection stiffness of the device,but also related to the spectral characteristics of the seismic waves.
作者
李锋
陈士通
马遥
史海东
LI Feng;CHEN Shitong;MA Yao;SHI Haidong(Hebei Engineering Research Center for Traffic Emergency and Guarantee,Shijiazhuang Tiedao University,Shijiazhuang Hebei 050043,China)
出处
《铁道建筑》
北大核心
2018年第8期38-41,共4页
Railway Engineering
基金
国家自然科学基金(51678376
51778022)
关键词
连续梁桥
减震效果
数值计算
IFA装置
LOCK-UP装置
锁定装置
Continuous girder bridge
Vibration absorption effect
Numerical calculation
IFA device
Lock-up device
Locking device
