地震下大跨径连续刚构桥合理约束体系研究
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摘要
为了研究地震作用下的大跨径连续刚构桥约束体系问题,在概念设计阶段即着手提高桥梁的抗震性能,针对当前相关技术和装置现状,提出了5种不同的约束体系进行分析处理。结合某110 m+210 m+110 m三跨连续刚构桥,使用三维空间有限元分析软件,采用非线性时程分析方法,对比了5种不同约束体系下桥梁的桩顶、墩底、墩顶等截面的弯矩值和位移值。结果表明,对于所研究的主跨大于150 m的大跨径连续刚构桥,在过渡墩处设置拉索钢阻尼减震支座和黏滞阻尼器组合体系是最合适的约束体系,使各墩的地震力合理分配,更好地提高了桥梁整体抗震水平。该研究成果,可供同类大跨连续刚构桥借鉴。
In order to study the seimic performance of the restraint system for a long-span continuous rigid frame bridge under earthquake action and improve the overall earthquake resistance level of the bridge at the conceptual design stage, five different constraint systems were proposed for analysis and processing based on the current state of related technologies and devices. For a three-span continuous rigid frame bridge, using the three dimensional finite element analysis software and nonlinear time history analysis method, the bending moments at the top and bottom of piers as well as the displacement at the pier tops when using five different restraint systems were comparatively analysed. The results show that for the long-span continuous rigid frame bridge with the main span of more than 150 m, the cable-stayed damping bearing and the viscous damper combination system is the most suitable restraint system, the distribution of seismic forces on the piers is rather reasonable and the overall seismic level of the bridge can be better improved. The research results can be used in the design of similar long-span continuous rigid frame bridges.
In order to study the seimic performance of the restraint system for a long-span continuous rigid frame bridge under earthquake action and improve the overall earthquake resistance level of the bridge at the conceptual design stage, five different constraint systems were proposed for analysis and processing based on the current state of related technologies and devices. For a three-span continuous rigid frame bridge, using the three dimensional finite element analysis software and nonlinear time history analysis method, the bending moments at the top and bottom of piers as well as the displacement at the pier tops when using five different restraint systems were comparatively analysed. The results show that for the long-span continuous rigid frame bridge with the main span of more than 150 m, the cable-stayed damping bearing and the viscous damper combination system is the most suitable restraint system, the distribution of seismic forces on the piers is rather reasonable and the overall seismic level of the bridge can be better improved. The research results can be used in the design of similar long-span continuous rigid frame bridges.
引文
[ 1 ] 叶爱君,胡世德,范立础.大跨桥梁抗震设计实用方法[J].土木工程学报,2001,34(1):1-6.YE Aijun,HU Shide,FAN Lichu.Practical method for seismic design of long span bridges[J].Journal of Civil Engineering,2001,34(1):1-6.
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[12] 周敉.大跨径混凝土箱梁桥约束体系研究分报告[R].西安:长安大学旧桥检测与加固技术重点实验室,2016.
[13] 袁万城,曹新建,荣肇骏.拉索减震支座的开发与试验研究[J].哈尔滨工程大学学报,2010,31(12):1593-1600.YUAN Wancheng,CAO Xinjian,RONG Zhaojun.Development and experimental research on cable damper bearings[J].Journal of Harbin Engineering University,2010,31(12):1593-1600.
[14] 王志强,胡世德,范立础.东海大桥黏滞阻尼器参数研究[J].中国公路学报,2005,18(3):37-42.WANG Zhiqiang,HU Shide,FAN Lichu.Study on viscous damper parameters of dong hai bridge[J].China Journal of Highway and Transport,2005,18(3):37-42.
[15] 夏修身,崔靓波,李建中.Lock-up装置的作用机理与分析模型[J].哈尔滨工程大学学报,2014,35(12):1497-1502.XIA Xiushen,CUI Liangbo,LI Jianzhong.Mechanism and analysis model of Lock-up device[J].Journal of Harbin Engineering University,2014,35(12):1497-1502.
[16] BUCKLE I G,MAYES R L.Seismic isolation history:application and performance world review[J].Earthquake Spectra,1990,6(2):181-201.
[ 2 ] SYMANS M D,CHARNEY F A,WHITTAKER A S,et al.Energy dissipation systems for seissmic application:current practiceand recent developments[J].Jourual of Structural Engineering,2008,134(1):3-21.
[ 3 ] BUCKLE I G,MAYES R L.Seismic isolation history:application and performancea world review[J].Earthquake Spectra,1990,6(2):181-201.
[ 4 ] VADER T S,NCDANIEL C C.Influence of damperson seismic response of cable-supported bridge towers[J].Journal of Bridge Engineering,2007,12(3):373-379.
[ 5 ] GUO T,LIU J,ZHANG Y F,et al.Displacement monitoring and analysis of expansion joints of long span steel bridges with viscous dampers[J].Journal of Bridge Engineering,2015,20(9):401-409.
[ 6 ] 彭天波,李建中,范立础.双曲面球形减隔震支座的开发和应用[J].同济大学学报,2007,35(2):176-180.PENG Tianbo,LI Jianzhong,FAN Lichu.Development and application of hyperbolic spherical seismic isolation bearings[J].Journal of Tongji University,2007,35(2):176-180.
[ 7 ] 范立础,王志强.桥梁减隔震设计[M].北京:人民交通出版社,2001.
[ 8 ] MORONI M O,BOROSCHEK R,SARRAZIN M.Dynami characteristic of Chilean bridges with seismic protection[J].Journal of Bridge Engineering,ASCE,2005,10(2):124-132.
[ 9 ] ROBERTS J E.Caltrans structural control for bridges in high seismic zones[J].Earthquake Engineering & Structural Dynamics,2005,34(4/5):449-470.
[10] 蒋建军,李建中,范立础.桥梁板式橡胶支座与黏滞阻尼器组合使用的减震性能研究[J].公路交通科技,2005,22(8):44-48.JIANG Jianjun,LI Jianzhong,FAN Lichu.Research on damping performance of bridge plate rubber bearing and viscous damper combination[J].Highway Communications Scienceand Technology,2005,22(8):44-48.
[11] 石岩,王东升,韩建平,等.桥梁减隔震技术的应用现状与发展趋势[J].地震工程与工程振动,2017,37(5):118-128.SHI Yan,WANG Dongsheng,HAN Jianping,et al.Application status and development trend of seismic isolateont echnology for bridges[J].Earthquake Engineering and Engineering Vibration,2017,37(5):118-128.
[12] 周敉.大跨径混凝土箱梁桥约束体系研究分报告[R].西安:长安大学旧桥检测与加固技术重点实验室,2016.
[13] 袁万城,曹新建,荣肇骏.拉索减震支座的开发与试验研究[J].哈尔滨工程大学学报,2010,31(12):1593-1600.YUAN Wancheng,CAO Xinjian,RONG Zhaojun.Development and experimental research on cable damper bearings[J].Journal of Harbin Engineering University,2010,31(12):1593-1600.
[14] 王志强,胡世德,范立础.东海大桥黏滞阻尼器参数研究[J].中国公路学报,2005,18(3):37-42.WANG Zhiqiang,HU Shide,FAN Lichu.Study on viscous damper parameters of dong hai bridge[J].China Journal of Highway and Transport,2005,18(3):37-42.
[15] 夏修身,崔靓波,李建中.Lock-up装置的作用机理与分析模型[J].哈尔滨工程大学学报,2014,35(12):1497-1502.XIA Xiushen,CUI Liangbo,LI Jianzhong.Mechanism and analysis model of Lock-up device[J].Journal of Harbin Engineering University,2014,35(12):1497-1502.
[16] BUCKLE I G,MAYES R L.Seismic isolation history:application and performance world review[J].Earthquake Spectra,1990,6(2):181-201.