独塔斜拉桥抗震分析及其合理约束体系研究
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摘要
以石河子独塔斜拉桥为工程背景,建立有限元抗震模型,采用反应谱法及非线性动力时程分析方法对该桥进行抗震分析,并将二者的结果进行对比。采用三角级数人工合成法生成人工地震波,计算结果与反应谱法基本接近。为研究纵向约束体系对独塔斜拉桥抗震性能的影响,分别对于刚构体系、漂浮体系、竖向支承体系、竖向支承加弹性索体系和竖向支承加黏滞阻尼器(FVD)体系等不同纵向约束体系独塔斜拉桥在罕遇地震作用下进行抗震计算。研究结果表明:当采用活动支座作为竖向支承时,支座摩阻力对结构的抗震性能有较大的提升,计算时应考虑其影响;竖向支承加FVD体系是相对最优的纵向抗震约束体系。
Taking Shihezi Bridge as an engineering background,response spectrum analysis method and nonlinear dynamic time-history analysis method,were conduced to seismic analysis based on finite seismic model,and the results were compared.In this paper,artificial seismic wave created by trigonometric series superposition was used for input,whose calculation results are consistent with response spectrum method.Longitudinal restraint systems,including rigid continuous beam system,floating system,vertical support system,vertical support doubling across elastic cable system,and vertical support doubling up fluid viscous damper(FVD)system,were considered to investigate seismic performance of single pylon cable-stayed bridge under the action of rarely occurring high fortification seismic,and the result shows that vertical support doubling up FVD system is the best option.Besides,bearing resistance,as one of live bearing parameters impacting on calculation results,has great significance in promoting structure ability of energy dissipation under the recommended vertical support system.
Taking Shihezi Bridge as an engineering background,response spectrum analysis method and nonlinear dynamic time-history analysis method,were conduced to seismic analysis based on finite seismic model,and the results were compared.In this paper,artificial seismic wave created by trigonometric series superposition was used for input,whose calculation results are consistent with response spectrum method.Longitudinal restraint systems,including rigid continuous beam system,floating system,vertical support system,vertical support doubling across elastic cable system,and vertical support doubling up fluid viscous damper(FVD)system,were considered to investigate seismic performance of single pylon cable-stayed bridge under the action of rarely occurring high fortification seismic,and the result shows that vertical support doubling up FVD system is the best option.Besides,bearing resistance,as one of live bearing parameters impacting on calculation results,has great significance in promoting structure ability of energy dissipation under the recommended vertical support system.
引文
[1]JTG/T D65-01-2007,公路斜拉桥设计细则[S].JTG/T D65-01-2007,Guidelines for design of highway cable-stayed bridge[S].
[2]JTG/T B02-01-2008,公路桥梁抗震设计细则[S].JTG/T B02-01-2008,Guidelines for seismic design of highway bridges[S].
[3]黄小国,李建中,郭磊.地震作用下独塔斜拉桥合理约束体系[J].结构工程师,2008,24(6):29-35.HUANG Xiaoguo,LI Jianzhong,GUO Lei.Appropriate constraint systems for simple-tower cablestayed bridges under earthquake[J].Structural Engineers,2008,24(6):29-35.
[4]刘昊苏,董军,杨昀.不同设计参数下矮塔斜拉桥的抗震动力学分析[J].工程力学,2013,30(增1):137-141.LIU Haosu,DONG Jun,YANG Yun.Seismic response for an extradosed cable-stayed curved bridge with different design parameters[J].Engineering Mechanics,2013,30(Supp1):137-141.
[5]焦常科,李爱群,伍小平.大跨双层斜拉桥地震响应控制[J].应用基础与工程科学学报,2012,20(4):704-712.JIAO Changke,LI Aiqun,WU Xiaoping.Seismic response control of double-deck long-span cablestayed bridges[J].Journal of Basic Science and Engineering,2012,20(4):704-712.
[6]胡聿贤.地震工程学[M].2版.北京:地震出版社,2006:150-173.HU Yuxian.Introduction to earthquake engineering[M].2nd ed.Beijing:Earthquake Publishing House,2006:150-173.
[7]Camara A,Astiz M A.Pushover analysis for the seismic response prediction of cable-stayed bridges under multi-directional excitation[J].Engineering Structures,2012(41):444-455.
[8]Ahmet Can Altunis-ik,Alemdar Bayraktar,Baris Sevim,et al.Ambient vibration based seismic evaluation of isolated gulburnu highway bridge[J].Soil Dynamics and Earthquake Engineering,2011(31):1496-1510.
[9]Shahria Alam M,Rahman Bhuiyan M A,Muntasir Billah A H M.Seismic fragility assessment of SMAbar restrained multi-span continuous highway bridge isolated by different laminated rubber bearings in medium to strong seismic risk zones[J].Bull Earthquake Eng,2012(10):1885-1909.
[10]Rahman Bhuiyan A,Shahria Alam M.Seismic performance assessment of highway bridges equipped with superelastic shape memory alloy-based laminated rubber isolation bearing[J].Engineering Structures,2013(49):396-407.
[11]姜冲虎,李德建.大跨度连续梁桥SSAB与FVD组合应用减隔震技术研究[J].铁道科学与工程学报,2013,10(6):28-32.JIANG Chonghu,LI Dejian.Seismic isolation technology research of long-span continuous beam bridge with SSAB and FVD[J].Journal of Railway Science and Engineering,2013,10(6):28-32.
[12]聂利英,李建中,胡世德.任意荷载作用下液体粘滞阻尼器在桥梁工程中减震作用探讨[J].计算力学学报,2007,24(2):197-202.NIE Liying,LI Jianzhong,HU Shide.Investigation of decreasing vibration effects of fluid viscous damper in engineering under random loads[J].Chinese Journal of Computational Mechanics,2007,24(2):197-202.
[2]JTG/T B02-01-2008,公路桥梁抗震设计细则[S].JTG/T B02-01-2008,Guidelines for seismic design of highway bridges[S].
[3]黄小国,李建中,郭磊.地震作用下独塔斜拉桥合理约束体系[J].结构工程师,2008,24(6):29-35.HUANG Xiaoguo,LI Jianzhong,GUO Lei.Appropriate constraint systems for simple-tower cablestayed bridges under earthquake[J].Structural Engineers,2008,24(6):29-35.
[4]刘昊苏,董军,杨昀.不同设计参数下矮塔斜拉桥的抗震动力学分析[J].工程力学,2013,30(增1):137-141.LIU Haosu,DONG Jun,YANG Yun.Seismic response for an extradosed cable-stayed curved bridge with different design parameters[J].Engineering Mechanics,2013,30(Supp1):137-141.
[5]焦常科,李爱群,伍小平.大跨双层斜拉桥地震响应控制[J].应用基础与工程科学学报,2012,20(4):704-712.JIAO Changke,LI Aiqun,WU Xiaoping.Seismic response control of double-deck long-span cablestayed bridges[J].Journal of Basic Science and Engineering,2012,20(4):704-712.
[6]胡聿贤.地震工程学[M].2版.北京:地震出版社,2006:150-173.HU Yuxian.Introduction to earthquake engineering[M].2nd ed.Beijing:Earthquake Publishing House,2006:150-173.
[7]Camara A,Astiz M A.Pushover analysis for the seismic response prediction of cable-stayed bridges under multi-directional excitation[J].Engineering Structures,2012(41):444-455.
[8]Ahmet Can Altunis-ik,Alemdar Bayraktar,Baris Sevim,et al.Ambient vibration based seismic evaluation of isolated gulburnu highway bridge[J].Soil Dynamics and Earthquake Engineering,2011(31):1496-1510.
[9]Shahria Alam M,Rahman Bhuiyan M A,Muntasir Billah A H M.Seismic fragility assessment of SMAbar restrained multi-span continuous highway bridge isolated by different laminated rubber bearings in medium to strong seismic risk zones[J].Bull Earthquake Eng,2012(10):1885-1909.
[10]Rahman Bhuiyan A,Shahria Alam M.Seismic performance assessment of highway bridges equipped with superelastic shape memory alloy-based laminated rubber isolation bearing[J].Engineering Structures,2013(49):396-407.
[11]姜冲虎,李德建.大跨度连续梁桥SSAB与FVD组合应用减隔震技术研究[J].铁道科学与工程学报,2013,10(6):28-32.JIANG Chonghu,LI Dejian.Seismic isolation technology research of long-span continuous beam bridge with SSAB and FVD[J].Journal of Railway Science and Engineering,2013,10(6):28-32.
[12]聂利英,李建中,胡世德.任意荷载作用下液体粘滞阻尼器在桥梁工程中减震作用探讨[J].计算力学学报,2007,24(2):197-202.NIE Liying,LI Jianzhong,HU Shide.Investigation of decreasing vibration effects of fluid viscous damper in engineering under random loads[J].Chinese Journal of Computational Mechanics,2007,24(2):197-202.
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