宁波甬江铁路斜拉桥的地震位移控制
|
摘要
大跨度斜拉桥通常采用漂浮体系或半漂浮体系以延长结构的基本周期,从而在强震作用下可以减小结构的地震惯性力,但地震位移较大。以甬江铁路斜拉桥为工程背景,在参数分析的基础上确定了合理的阻尼器参数,研究了粘滞阻尼器在地震位移控制中的作用,并与不设阻尼器的情况进行了比较,结果表明:粘滞阻尼器可以有效控制大跨度斜拉桥的地震位移,改善塔底的地震剪力,明显减小低重心斜拉桥的塔底地震弯矩。
Floating or semi-floating systems are usually employed for long-span cable-stayed bridges;these bridges always have longer base periods.Though the earthquake forces of these type cable-stayed bridges are smaller,the seismic displacement is bigger than those with other systems.This paper takes Yong-jiang Railway cable-stayed bridge in Ningbo as an example to study the role of viscous damper in controlling the seismic displacement.The rational parameters of viscous damper were determined after parameter analysis,and then the seismic displacements of the bridge,with or without viscous dampers,were compared.The result showed that viscous damper was efficient in controlling seismic displacement of long-span cable-stayed bridge;the seismic shear forces at bottom of towers were reduced slightly and the seismic moments at bottom of towers were reduced in a larger extent for the cable-stayed bridge with low gravity center.
Floating or semi-floating systems are usually employed for long-span cable-stayed bridges;these bridges always have longer base periods.Though the earthquake forces of these type cable-stayed bridges are smaller,the seismic displacement is bigger than those with other systems.This paper takes Yong-jiang Railway cable-stayed bridge in Ningbo as an example to study the role of viscous damper in controlling the seismic displacement.The rational parameters of viscous damper were determined after parameter analysis,and then the seismic displacements of the bridge,with or without viscous dampers,were compared.The result showed that viscous damper was efficient in controlling seismic displacement of long-span cable-stayed bridge;the seismic shear forces at bottom of towers were reduced slightly and the seismic moments at bottom of towers were reduced in a larger extent for the cable-stayed bridge with low gravity center.
引文
[1]梁智垚,李建中.大跨度公铁两用斜拉桥阻尼器参数研究[J].同济大学学报(自然科学版),2007,35(6):728-733.Liang Z Y,Li J Z.Research on Damper Parameters ofLong-Span Rail-Cum-Road Cable-Stayed Bridge[J].Journal of Tongji University(Natural Science),2007,35(6):728-733.(in Chinese)
[2]叶爱君,胡世德,范立础.超大跨度斜拉桥的地震位移控制[J].土木工程学报2,0043,7(12):38-43.Ye A J,Hu S D,Fan L C.Seismic DisplacementsControl for Super-Long-Span Cable-Stayed Bridges[J].China Civil Engineering Journal,2004,37(12):38-43.(in Chinese)
[3]叶爱君,范立础.附加阻尼器对超大跨度斜拉桥的减震效果[J].同济大学学报(自然科学版),2006,34(7):860-863.Ye A J,Fan L C.Seismic Response Reduction of aSuper-Long-Span Cable-Stayed Bridge by AddingDampers[J].Journal of Tongji University(NaturalScience)2,0063,4(7):860-863.(in Chinese)
[4]王志强,胡世德,范立础.东海大桥粘滞阻尼器参数研究[J].中国公路学报2,0051,8(3):37-42.Wang Z Q,Hu S D,Fan L C.Research on ViscousDamper Parameters of Donghai Bridge[J].ChinaJournal of Highway and Transport,2005,18(3):37-42.(in Chinese)
[5]包立新,李小珍,卫星,等.宜宾长江公路大桥斜拉桥抗震性能评价[J].工程力学,2008,25(2):174-182.Bao L X,Li X Z,Wei X,et al.Evaluation of SeismicResistance Capacity for Yibin Yangtze River Cable-Stayed Bridge[J].Engineering Mechanics,2008,25(2):174-182.(in Chinese)
[6]秦权,孙晓燕,贺瑞,等.苏通桥对非一致地震地面运动的反应和人工波质量的讨论[J].工程力学,2006,23(9):71-83.Qin Q,Sun X Y,He R,et al.Responses of SutongCable-Stayed Bridge to Asynchronous EarthquakeGround Motions and Quality of Synthetic TimeHistories[J].Engineering Mechanics,2006,23(9):71-83.(in Chinese)
[7]叶爱君,胡世德,范立础.桥梁支座抗震性能的模拟分析[J].同济大学学报2,0012,9(1):6-9.Ye A J,Hu S D,Fan L C.Simulation of SeismicBehavior for Bridge Bearings[J].Journal of TongjiUniversity,2001,29(1):6-9.(in Chinese)
[8]Lin W H,Anil K.Chopra.Earthquake Response ofElastic SDF Systems with Non-Linear Fluid ViscousDampers[J].Earthquake Engineering and StructuralDynamics2,0023,1(9):1623-1642.
[9]高永,刘慈军,彭天波,等.阻尼器和弹性索组合使用对大跨斜拉桥地震反应的影响[J].结构工程师2,0082,4(5):71-76.Gao Y,Liu C J,Peng T B,et al.Seismic PerformanceAnalysis of Long-Span Cable-Stayed Bridges usingboth Dampers and Elastic Cable[J].StructuralEngineers,2008,24(5):71-76.(in Chinese)
[10]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.Wu T J,Li J Z,Guan Z G.Mechanism of SeismicIsolation Devices and Applications in a Long-SpanContinuous Bridge[J].Structural Engineers,2009,25(4):102-107.(in Chinese)
[11]张文学,李建中,李怀峰.低重心斜拉桥地震响应特性研究[J].桥梁建设2,007(5):21-23.Zhang W X,Li J Z,Li H F.Study of SeismicResponse Characteristics of Low Gravity Center Cable2 Stayed Bridge[J].Bridge Construction,2007(5):21-23.(in Chinese)
[2]叶爱君,胡世德,范立础.超大跨度斜拉桥的地震位移控制[J].土木工程学报2,0043,7(12):38-43.Ye A J,Hu S D,Fan L C.Seismic DisplacementsControl for Super-Long-Span Cable-Stayed Bridges[J].China Civil Engineering Journal,2004,37(12):38-43.(in Chinese)
[3]叶爱君,范立础.附加阻尼器对超大跨度斜拉桥的减震效果[J].同济大学学报(自然科学版),2006,34(7):860-863.Ye A J,Fan L C.Seismic Response Reduction of aSuper-Long-Span Cable-Stayed Bridge by AddingDampers[J].Journal of Tongji University(NaturalScience)2,0063,4(7):860-863.(in Chinese)
[4]王志强,胡世德,范立础.东海大桥粘滞阻尼器参数研究[J].中国公路学报2,0051,8(3):37-42.Wang Z Q,Hu S D,Fan L C.Research on ViscousDamper Parameters of Donghai Bridge[J].ChinaJournal of Highway and Transport,2005,18(3):37-42.(in Chinese)
[5]包立新,李小珍,卫星,等.宜宾长江公路大桥斜拉桥抗震性能评价[J].工程力学,2008,25(2):174-182.Bao L X,Li X Z,Wei X,et al.Evaluation of SeismicResistance Capacity for Yibin Yangtze River Cable-Stayed Bridge[J].Engineering Mechanics,2008,25(2):174-182.(in Chinese)
[6]秦权,孙晓燕,贺瑞,等.苏通桥对非一致地震地面运动的反应和人工波质量的讨论[J].工程力学,2006,23(9):71-83.Qin Q,Sun X Y,He R,et al.Responses of SutongCable-Stayed Bridge to Asynchronous EarthquakeGround Motions and Quality of Synthetic TimeHistories[J].Engineering Mechanics,2006,23(9):71-83.(in Chinese)
[7]叶爱君,胡世德,范立础.桥梁支座抗震性能的模拟分析[J].同济大学学报2,0012,9(1):6-9.Ye A J,Hu S D,Fan L C.Simulation of SeismicBehavior for Bridge Bearings[J].Journal of TongjiUniversity,2001,29(1):6-9.(in Chinese)
[8]Lin W H,Anil K.Chopra.Earthquake Response ofElastic SDF Systems with Non-Linear Fluid ViscousDampers[J].Earthquake Engineering and StructuralDynamics2,0023,1(9):1623-1642.
[9]高永,刘慈军,彭天波,等.阻尼器和弹性索组合使用对大跨斜拉桥地震反应的影响[J].结构工程师2,0082,4(5):71-76.Gao Y,Liu C J,Peng T B,et al.Seismic PerformanceAnalysis of Long-Span Cable-Stayed Bridges usingboth Dampers and Elastic Cable[J].StructuralEngineers,2008,24(5):71-76.(in Chinese)
[10]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.Wu T J,Li J Z,Guan Z G.Mechanism of SeismicIsolation Devices and Applications in a Long-SpanContinuous Bridge[J].Structural Engineers,2009,25(4):102-107.(in Chinese)
[11]张文学,李建中,李怀峰.低重心斜拉桥地震响应特性研究[J].桥梁建设2,007(5):21-23.Zhang W X,Li J Z,Li H F.Study of SeismicResponse Characteristics of Low Gravity Center Cable2 Stayed Bridge[J].Bridge Construction,2007(5):21-23.(in Chinese)
版权所有：© 2023 中国地质图书馆 中国地质调查局地学文献中心