桥梁辊轴摩擦支座的减震性能研究
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摘要
支座连接件是桥梁整体抗震性能的一个薄弱环节,针对汶川地震中大量桥梁支座普遍出现病害的现象,基于能量耗散理论提出了辊轴摩擦支座的应用。利用有限元分析软件ANSYS对地震波激励下普通橡胶支座与滚轴摩擦支座的地震响应进行对比,重点分析了其沿支座平动方向的动力特性,研究结果表明,辊轴摩擦支座在控制地震响应的同时能很好地控制梁体移位,延长桥梁结构的自振周期,避开地震能量的集中区,降低结构的内力及位移,使结构内力得以合理分配,支座在运动不发生转动,只有水平方向平动,保证上部结构的稳定性,震后结构复位较容易,隔震效果显著。
Bearing joints of the bridge is a weak link on the overall seismic performance,for the Wen-chuan earthquake,a large number of bridge bearings appear the phenomenon of widespread diseases,the friction roller bearings application is put forward based on energy dissipation theory.Using finite element analysis software ANSYS,compared with the seismic response of ordinary rubber bearings and roller fric-tion bearings on seismic wave excitation,the dynamic characteristics of translational direction along the bearing are analyzed,the results show that: the friction roller bearings can control the beam shift in a very good body at the same time in the control of seismic response,extend the bridge structure from the vibra-tion cycle,avoid the concentration of seismic energy area,reduce the structure's internal forces and dis-placement,so that the internal forces in structure are ranonally allocated,bearing is not rotate in sports,only moving to the horizontal direction parallel,ensure the stability of the superstructure,post-earth-quake structural reset is easier,isolation effect is remarkable.
Bearing joints of the bridge is a weak link on the overall seismic performance,for the Wen-chuan earthquake,a large number of bridge bearings appear the phenomenon of widespread diseases,the friction roller bearings application is put forward based on energy dissipation theory.Using finite element analysis software ANSYS,compared with the seismic response of ordinary rubber bearings and roller fric-tion bearings on seismic wave excitation,the dynamic characteristics of translational direction along the bearing are analyzed,the results show that: the friction roller bearings can control the beam shift in a very good body at the same time in the control of seismic response,extend the bridge structure from the vibra-tion cycle,avoid the concentration of seismic energy area,reduce the structure's internal forces and dis-placement,so that the internal forces in structure are ranonally allocated,bearing is not rotate in sports,only moving to the horizontal direction parallel,ensure the stability of the superstructure,post-earth-quake structural reset is easier,isolation effect is remarkable.
引文
[1]宋胜武.汶川大地震工程震害调查分析与研究[M].北京:科学出版社,2009.
[2]SONG T T,DARGUSH G F.Passive Energyl Dissipatlon Systems in Structural Engineering[M].New York:Jhon Wiley&Sons,1997.
[3]钟铁毅,李宇,杨凤利,阎贵平.铅芯橡胶支座隔震连续梁桥的地震能量反应分析[J].中国铁道科学,2009,30(3):9-14.
[4]范夕森,张鑫,苏小卒,张青.辊轴一橡胶垫支座组合隔震体系的模型振动台实验研究[J].工程抗震与加固改造,2009,31(2):43-48.
[5]王克海.桥梁抗震研究[M].北京:中国铁道出版社,2007.
[6]袁明,冯刚宪.铁路桥梁新型滑板铰轴支座设计研究[J].桥梁建设,2005,(增刊):151-153.
[7]葛楠,初建宇,苏幼坡,苏经,周锡元.圆弧滑道辊轴摩擦摆隔震系统的研究[J].建筑科学,2009,(1):1-4.
[8]葛楠,苏幼坡,王兴国.建筑物滚动摩擦隔震理论[J].河北理工大学学报,2008,(4):132-136.
[9]叶章旺.考虑活动支座摩擦力的连续梁桥抗震性能分析[J].路基工程,2009,(3):112-113.
[10]Tsopelas P,Constantinou M C,Kim Y S,Okamoto S.Experimental study of FRS system in bridge isolation[J].Earthquake Engineering and Structural Dynam-ics,1996,(25):65-78.
[11]朱大鹏,张扬扬.基于ANSYS分析新型辊轴隔震支座结构体系[J].广东土木与建筑,2008,12(12):14-16.
[12]BRUNEAU M,WANG Niandi.Some Aspects of En-ergy Methods for the Inelastic Seismic Response ofDuetile SDOF Structures[J].Engineering Structures,1996,18(1):1-12.
[13]庄鹏,薛素铎,李彬双.SMA橡胶支座滞回性能的理论模型[J].北京工业大学学报,2006,32(10):890-894.
[14]孙黄胜,施卫星.黏滞耗能基础隔震结构分析[J].四川建筑科学研究,2008,34(4):175-178.
[15]Wang YerrPo,Chung Lap Loi,Liao,Wed Hsin.Sesmic re-sponse analysis of bridges isolated with friction pendu-lum bearing[J].Earthquake Engineering&StrueturalDynamics,1998,27(10):1069-1093.
[2]SONG T T,DARGUSH G F.Passive Energyl Dissipatlon Systems in Structural Engineering[M].New York:Jhon Wiley&Sons,1997.
[3]钟铁毅,李宇,杨凤利,阎贵平.铅芯橡胶支座隔震连续梁桥的地震能量反应分析[J].中国铁道科学,2009,30(3):9-14.
[4]范夕森,张鑫,苏小卒,张青.辊轴一橡胶垫支座组合隔震体系的模型振动台实验研究[J].工程抗震与加固改造,2009,31(2):43-48.
[5]王克海.桥梁抗震研究[M].北京:中国铁道出版社,2007.
[6]袁明,冯刚宪.铁路桥梁新型滑板铰轴支座设计研究[J].桥梁建设,2005,(增刊):151-153.
[7]葛楠,初建宇,苏幼坡,苏经,周锡元.圆弧滑道辊轴摩擦摆隔震系统的研究[J].建筑科学,2009,(1):1-4.
[8]葛楠,苏幼坡,王兴国.建筑物滚动摩擦隔震理论[J].河北理工大学学报,2008,(4):132-136.
[9]叶章旺.考虑活动支座摩擦力的连续梁桥抗震性能分析[J].路基工程,2009,(3):112-113.
[10]Tsopelas P,Constantinou M C,Kim Y S,Okamoto S.Experimental study of FRS system in bridge isolation[J].Earthquake Engineering and Structural Dynam-ics,1996,(25):65-78.
[11]朱大鹏,张扬扬.基于ANSYS分析新型辊轴隔震支座结构体系[J].广东土木与建筑,2008,12(12):14-16.
[12]BRUNEAU M,WANG Niandi.Some Aspects of En-ergy Methods for the Inelastic Seismic Response ofDuetile SDOF Structures[J].Engineering Structures,1996,18(1):1-12.
[13]庄鹏,薛素铎,李彬双.SMA橡胶支座滞回性能的理论模型[J].北京工业大学学报,2006,32(10):890-894.
[14]孙黄胜,施卫星.黏滞耗能基础隔震结构分析[J].四川建筑科学研究,2008,34(4):175-178.
[15]Wang YerrPo,Chung Lap Loi,Liao,Wed Hsin.Sesmic re-sponse analysis of bridges isolated with friction pendu-lum bearing[J].Earthquake Engineering&StrueturalDynamics,1998,27(10):1069-1093.
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