长周期地震动作用下大跨径斜拉桥响应分析
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摘要
为研究长周期地震动对大跨径桥梁地震响应的影响,分别选取了若干长周期地震波和普通地震波进行频谱特性对比;以某特大跨径斜拉桥为例,建立了有限元模型,采用非线性时程分析方法对比分析了2类地震动作用下该桥的地震响应。为控制大跨径斜拉桥在2类地震动激励下梁端的位移响应,选用了弹性连接装置和液体粘滞阻尼器2种措施对比研究了其减震效果。结果表明:长周期地震动对大跨径桥梁的位移及内力响应影响显著;在长周期地震动作用下,弹性连接装置的位移控制效率较低,并会导致结构内力的大幅增加;参数合理的液体粘滞阻尼器的控制效果具有较好的广谱性,即在普通地震动和长周期地震动作用下均有较好的减震效果。
In order to study the influence of long-period ground motion on seismic response of long span bridges,some long-period ground motions and conventional ground motions were selected,and the comparative analysis on spectral characteristics of these motions were carried out.A long span cable-stayed bridge was taken as an example to analyze the seismic response of the bridge under two types of ground motions by using nonlinear time-history method.Elastic connection device and fluid viscous damper were used to mitigate the seismic response of the bridge under two types of the ground motions.In addition,the effects of the two kinds of devices were analyzed.The results show that long period ground motions have great influence on seismic response of the bridge.Elastic connection device has lower efficiency and will introduce more seismic force into the bridge under long-period ground motion.While,the effect of fluid viscous damper is broad-spectrum,that is,it has wonderful and stable effect under both long-period ground motion and conventional ground motion with proper damping parameters.
引文
[1]谢开仲,吕文高,覃乐勤,等.钢管混凝土拱桥地震破坏评估研究[J].中国公路学报,2012,25(2):53-59.XIE Kai-zhong,LU Wen-gao,QIN Le-qin,et al.Research on Seismic Damage Evaluation of CFST Arch Bridges[J].China Journal of Highway and Transport,2012,25(2):53-59.
    [2]焦常科,李爱群.非弹性连接对三塔悬索桥地震响应的影响[J].中国公路学报,2013,26(1):98-105.JIAO Chang-ke,LI Ai-qun.Influence of Inelastic Connection on Seismic Response of Triple-tower Suspension Bridge[J].China Journal of Highway and Transport,2013,26(1):98-105.
    [3]汤虎,李建中.板式橡胶支座桥梁地震位移控制方法[J].中国公路学报,2013,26(3):110-116.TANG Hu,LI Jian-zhong.Displacement Control Method for Continuous Bridges on Laminated Rubber Bearings Under Earthquake Excitation[J].China Journal of Highway and Transport,2013,26(3):110-116.
    [4]董建华,马巍,朱彦鹏.土钉墙地震动力分析及抗震设计方法[J].中国公路学报,2013,26(2):34-41.DONG Jian-hua,MA Wei,ZHU Yan-peng.Seismic Analysis and Design Method for Soil Nailing Retaining Wall[J].China Journal of Highway and Transport,2013,26(2):34-41.
    [5]魏标,崔睿博,戴公连,等.橡胶支座对非规则连续梁桥地震反应的影响[J].中国公路学报,2013,26(6):110-117.WEI Biao,CUI Rui-bo,DAI Gong-lian,et al.Impact of Laminated Rubber Bearings on Seismic Response of Irregular Continuous Bridges[J].China Journal of Highway and Transport,2013,26(6):110-117.
    [6]李春锋,张旸.长周期地震动衰减关系研究的迫切性[J].地震地磁观测与研究,2006,27(3):1-8.LI Chun-feng,ZHANG Yang.Urgency of the Study of Long-period Ground Motion[J].Seismological and Geomagnetic Observation and Research,2006,27(3):1-8.
    [7]杨伟林,朱升初,洪海春,等.汶川地震远场地震动特性及其对长周期结构影响的分析[J].防灾减灾工程学报,2009,29(4):473-478.YANG Wei-lin,ZHU Sheng-chu,HONG Hai-chun,et al.Characteristics of Far-field Ground Motion of Wenchuan Earthquake and the Effect on Long-period Structures[J].Journal of Disaster Prevention and Mitigation Engineering,2009,29(4):473-478.
    [8]KOKETSU K,MIYAKE H.A Seismological Overview of Long-period Ground Motion[J].Journal of Seismology,2008,12(2):133-143.
    [9]YAMADA N,IWATA T.Long-period Ground Motion Simulation in the Kinki Area During the MJ 7.1Foreshock of the 2004off the Kii Peninsula Earthquakes[J].Earth Planets and Space,2005,57(3):197-202.
    [10]IWAKI A,IWATA T.Simulation of Long-period Ground Motion in the Osaka Sedimentary Basin:Performance Estimation and the Basin Structure Effects[J].Geophysical Journal International,2010,181(2):1062-1076.
    [11]臧明明,陈清军.长周期地震动的场地效应与大跨桥梁结构的动力响应分析[J].结构工程师,2010,26(1):118-125.ZANG Ming-ming,CHEN Qing-jun.Site Effect of Long-period Ground Motion and Dynamic Analysis of Long-span Bridge Structures[J].Structural Engineers,2010,26(1):118-125.
    [12]张振炫,陈清军.高层建筑结构长周期地震反应的比较研究[J].结构工程师,2009,25(4):78-84.ZHANG Zhen-xuan,CHEN Qing-jun.A Comparative Study on Long-period Seismic Responses for Highrise Structures[J].Structural Engineers,2009,25(4):78-84.
    [13]熊辉,李正良,晏致涛,等.地震反应谱、功率谱以及傅里叶谱关系探讨[J].四川建筑科学研究,2011,37(2):171-179.XIONG Hui,LI Zheng-liang,YAN Zhi-tao,et al.The Relation Between the Earthquake Response Spectrum,Power Spectrum and Fourier Spectrum[J].Sichuan Building Science,2011,37(2):171-179.
    [14]焦驰宇,李建中,彭天波.塔梁连接方式对大跨斜拉桥地震反应的影响[J].振动与冲击,2009,28(10):179-184.JIAO Chi-yu,LI Jian-zhong,PENG Tian-bo.Effects of Different Connecting Styles Between Towers and Deck on Seismic Responses of a Long-span Cablestayed Bridge[J].Journal of Vibration and Shock,2009,28(10):179-184.
    [15]LEE D,TAYLOR D P.Viscous Damper Development and Future Trends[J].Structural Design of Tall Buildings,2001,10(5):311-320.
    [16]LIU W,TONG M,LEE G C.Optimization Methodology for Damper Configuration Based on Building Performance Indices[J].Journal of Structural Engineering,2005,131(11):1746-1756.
    [17]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,2005,18(3):37-42.WANG Zhi-qiang,HU Shi-de,FAN Li-chu.Research on Viscous Damper Parameters of Donghai Bridge[J].China Journal of Highway and Transport,2005,18(3):37-42.
    [18]聂利英,李建中,胡世德,等.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 Li-ying,LI Jian-zhong,HU Shi-de,et al.Investigation of Decreasing Vibration Effects of Fluid Viscous Damper in Bridge Engineering Under Random Loads[J].Chinese Journal of Computational Mechanics,2007,24(2):197-202.
    [19]卢桂臣,胡雷挺.西堠门大桥液体粘滞阻尼器参数分析[J].世界桥梁,2005(2):43-45.LU Gui-chen,HU Lei-ting.Analysis of Parametric Sensitivity of Fluid Viscous Dampers for Xihoumen Bridge[J].World Bridges,2005(2):43-45.

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