考虑支座摩擦和墩柱损伤的桥梁用液体粘滞阻尼器参数确定方法
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摘要
对桥梁阻尼器参数确定方法的相关文献进行了回顾,指出现有常用参数分析法费时费力;而简化分析法存在仅适用于结构保持在弹性阶段、无法考虑罕遇地震下支座摩擦及墩柱轻度损伤等复杂情况的弊端。以非线性静力分析获得的能力曲线为基础,利用性能点、目标点求解时获得的关键参数,结合等效弹性单自由度体系附加非线性粘滞阻尼器的参数确定公式,提出了考虑支座摩擦和墩柱损伤的桥用阻尼器参数确定方法。将该方法应用于某三跨连续梁桥抗震加固分析,验证了该方法的实用性及准确性。指出了该方法具有的优势及使用时需注意的问题。本文方法可用于中小跨径桥梁抗震加固时液体粘滞阻尼器的参数确定。
By reviewing parameter determination methods for fluid viscous damper(FVD) applied in structural engineering,the defect of time consuming when using parameter analysis method,and the defect of not considering the bearing friction and other nonlinearity when using normal simplified method were pointed out.A new parameter determinations method which can easily and quickly consider the above effects was proposed.It can be expressed as follows:based on the pushover curve given by nonlinear static analysis,getting the key parameters when calculating performance point and target point,then substituting them into the structural dynamic formula of elastic SDF system with non-linear fluid viscous dampers,the approprite parameter of the viscous damper can be achieved.Taking a seismic retrofitting example of a three-span continuous girder bridge using FVD,the accuracy and practicality of the parameter determination method given in the paper was validated.The advantages and some problems which should be noticed when using this method were given.The parameter determination method can be used in similar seismic retrofit design of medium and small-span bridges when FVD were used.
By reviewing parameter determination methods for fluid viscous damper(FVD) applied in structural engineering,the defect of time consuming when using parameter analysis method,and the defect of not considering the bearing friction and other nonlinearity when using normal simplified method were pointed out.A new parameter determinations method which can easily and quickly consider the above effects was proposed.It can be expressed as follows:based on the pushover curve given by nonlinear static analysis,getting the key parameters when calculating performance point and target point,then substituting them into the structural dynamic formula of elastic SDF system with non-linear fluid viscous dampers,the approprite parameter of the viscous damper can be achieved.Taking a seismic retrofitting example of a three-span continuous girder bridge using FVD,the accuracy and practicality of the parameter determination method given in the paper was validated.The advantages and some problems which should be noticed when using this method were given.The parameter determination method can be used in similar seismic retrofit design of medium and small-span bridges when FVD were used.
引文
[1]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):179-183.JIAO Chi-yu,LI Jian-zhong,PENG Tian-bo.Differentconnecting styles between towers and deck effects on seismicresponses of long-span cable-stayed bridge[J].Vibration andShock,2009,28(10):179-183.
[2]叶爱君,胡世德,范立础.超大跨径斜拉桥的地震位移控制[J].土木工程学报,2004,37,(12):38-43.YE Ai-jun,HU Shi-de,FAN Li-chu.Seismic displacementcontrol for super-long-span cable-stayed bridges[J].Chinacivil engineering journal,2004,37(12):38-43.
[3]袁万城,闫冬.斜拉桥纵飘频率简化计算方法[J].同济大学学报,2005,33(11):1423-1427.YUAN Wan-cheng,YAN Dong.Simplified calculationalmethod of floating frequency for cable-stayed bridges[J]Journal of Tongji University(Natural Science),2005,33(11):1423-1427.
[4]颜海泉,王君杰.飘浮体系斜拉桥纵向抗震计算的单塔模型[J].地震工程与工程振动,2007,27(4):80-86.YAN Hai-quan,WANG jun-jie.A tower model for seismicresponse prediction of floating cable-stayed bridge inlongitudinal direction[J].Journal of Earthquake Engineeringand Engineering Vibration,2007,27(4):80-86.
[5]聂利英,李建中,胡世德.任意荷载作用下液体黏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 ofdecreasing vibration effects of fluid viscous damper in bridgeengineering under random loads[J].Chinese Journal ofComputational Mechanics,2007,24(2):197-202.
[6]刘龙源,李硕娇,聂利英.中小跨度悬索桥非线性液体黏滞阻尼器反应谱迭代方法[J].河海大学学报:自然科学版,2010,38,(5):550-554.LIU Long-yuan,LI Shuo-jiao,NIE Li-ying.Iterative responsespectrum method of non linear fluid viscous dampers for mediumand small-span suspension bridges[J].Journal of HohaiUniversity(Natural Sciences),2010,38,(5):550-554.
[7]王常峰,陈兴冲,朱东生.活动支座摩擦力对桥梁抗震性能的影响参数分析[J].世界地震工程,2005,21(4):82-87.WANG Chang-feng,CHEN Xing-chong,ZHU Dong-sheng.Analysis on the influence of the friction force at the movablesupports on the seismic performance of a bridge[J].WorldEarthquake Engineering,2005,21(4):82-87.
[8]Lin W H,Anil K C.Earthquake response of elastic SDFsystems with nonlinear fluid viscous dampers[J].EarthquakeEngng.Struct.Dyn.,2002,31:1623-1642.
[9]Mander J B,Kim D K,Chen S S,et al.Response of steelbridge bearings to reversed cyclic loading[R].National Centerfor Earthquake Engineering Research,1996.
[2]叶爱君,胡世德,范立础.超大跨径斜拉桥的地震位移控制[J].土木工程学报,2004,37,(12):38-43.YE Ai-jun,HU Shi-de,FAN Li-chu.Seismic displacementcontrol for super-long-span cable-stayed bridges[J].Chinacivil engineering journal,2004,37(12):38-43.
[3]袁万城,闫冬.斜拉桥纵飘频率简化计算方法[J].同济大学学报,2005,33(11):1423-1427.YUAN Wan-cheng,YAN Dong.Simplified calculationalmethod of floating frequency for cable-stayed bridges[J]Journal of Tongji University(Natural Science),2005,33(11):1423-1427.
[4]颜海泉,王君杰.飘浮体系斜拉桥纵向抗震计算的单塔模型[J].地震工程与工程振动,2007,27(4):80-86.YAN Hai-quan,WANG jun-jie.A tower model for seismicresponse prediction of floating cable-stayed bridge inlongitudinal direction[J].Journal of Earthquake Engineeringand Engineering Vibration,2007,27(4):80-86.
[5]聂利英,李建中,胡世德.任意荷载作用下液体黏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 ofdecreasing vibration effects of fluid viscous damper in bridgeengineering under random loads[J].Chinese Journal ofComputational Mechanics,2007,24(2):197-202.
[6]刘龙源,李硕娇,聂利英.中小跨度悬索桥非线性液体黏滞阻尼器反应谱迭代方法[J].河海大学学报:自然科学版,2010,38,(5):550-554.LIU Long-yuan,LI Shuo-jiao,NIE Li-ying.Iterative responsespectrum method of non linear fluid viscous dampers for mediumand small-span suspension bridges[J].Journal of HohaiUniversity(Natural Sciences),2010,38,(5):550-554.
[7]王常峰,陈兴冲,朱东生.活动支座摩擦力对桥梁抗震性能的影响参数分析[J].世界地震工程,2005,21(4):82-87.WANG Chang-feng,CHEN Xing-chong,ZHU Dong-sheng.Analysis on the influence of the friction force at the movablesupports on the seismic performance of a bridge[J].WorldEarthquake Engineering,2005,21(4):82-87.
[8]Lin W H,Anil K C.Earthquake response of elastic SDFsystems with nonlinear fluid viscous dampers[J].EarthquakeEngng.Struct.Dyn.,2002,31:1623-1642.
[9]Mander J B,Kim D K,Chen S S,et al.Response of steelbridge bearings to reversed cyclic loading[R].National Centerfor Earthquake Engineering Research,1996.
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