连续梁桥锁定装置的减震效果对比研究
|
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 fixed 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 oflocking devices is not only affected by the connection stiffness of the device,but also related to the spectral characteristics of the seismic waves.
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 fixed 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 oflocking devices is not only affected by the connection stiffness of the device,but also related to the spectral characteristics of the seismic waves.
引文
[1]石秋君,佟嘉明,李东昇,等.新型速度锁定装置在铁路桥梁加固改造中的应用[J].铁道建筑,2015,55(10):76-79.
[2]赵继康.多跨连续梁桥分散抗震设计研究[D].兰州:兰州交通大学,2016.
[3]颜志华,马良喆,陈永祁.速度锁定装置在津秦客运专线减震设计中的应用[J].桥梁建设,2014,44(1):95-100.
[4]吴陶晶,李建中,管仲国.减隔震装置作用机理及其在大跨度连续梁桥中的应用[J].结构工程师,2009,25(4):102-107.
[5]刘俊.高烈度区多跨刚构连续梁桥减隔震设计研究[J].铁道工程学报,2013,30(5):40-46.
[6]张永亮,陈兴冲,颜志华.Lock-up装置在连续梁桥上的减震性能研究[J].世界地震工程,2010,26(2):48-52.
[7]王新敏.ANSYS工程结构数值分析[M].北京:人民交通出版社,2007.
[8]王新敏,李义强,许宏伟.ANSYS结构分析单元与应用[M].北京:人民交通出版社,2011.
[2]赵继康.多跨连续梁桥分散抗震设计研究[D].兰州:兰州交通大学,2016.
[3]颜志华,马良喆,陈永祁.速度锁定装置在津秦客运专线减震设计中的应用[J].桥梁建设,2014,44(1):95-100.
[4]吴陶晶,李建中,管仲国.减隔震装置作用机理及其在大跨度连续梁桥中的应用[J].结构工程师,2009,25(4):102-107.
[5]刘俊.高烈度区多跨刚构连续梁桥减隔震设计研究[J].铁道工程学报,2013,30(5):40-46.
[6]张永亮,陈兴冲,颜志华.Lock-up装置在连续梁桥上的减震性能研究[J].世界地震工程,2010,26(2):48-52.
[7]王新敏.ANSYS工程结构数值分析[M].北京:人民交通出版社,2007.
[8]王新敏,李义强,许宏伟.ANSYS结构分析单元与应用[M].北京:人民交通出版社,2011.