活动支座摩擦力对连续梁桥抗震性能的影响
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摘要
为揭示连续桥梁支座摩擦作用在地震波作用下的响应规律,采用动态时程分析法,以预应力混凝土现浇连续箱梁桥为背景,建立三种工况的有限元模型,借助ANSYS有限元软件分析了El-Centro波、天津波对支座、桩径、初始刚度等多种工况下的减震率影响的变化规律,得出了对于连续桥梁设置活动支座有利于桥梁抗震,认为在桥梁抗震中由固定墩单独抗震设计是偏于安全的.研究表明,对于连续桥梁在进行抗震设计时应考虑活动支座的摩擦作用,最佳摩擦系数的确定应考虑到桥梁结构刚度、模型简化体系的影响.
In order to reveal the respond rules of the continuous bridge bearing friction action in seismic waves,using dynamic time history analysis,against the background of cast-in-situ prestressed concrete continuous box girder bridge,the finite element model in three working conditions is built.With the finite element software—ANSYS,this study analyzed the change rules of El-Centro waves and Tianjin seismic waves effections of vibration decreasing ratio on bearing,stake diameter and initial stiffness in several working conditions.The setting expansion bearing on continuous bridge is conducive to shock resistance,and separate seismic design for the anchor block in the bridge anti-earthquake is in favor of safety.The result of research shows that seismic design for continuous bridge should consider the frictional effect of expansion bearing,and the determination of the best friction coefficient should consider the influence of bridge structure stiffness and model simplified system.
In order to reveal the respond rules of the continuous bridge bearing friction action in seismic waves,using dynamic time history analysis,against the background of cast-in-situ prestressed concrete continuous box girder bridge,the finite element model in three working conditions is built.With the finite element software—ANSYS,this study analyzed the change rules of El-Centro waves and Tianjin seismic waves effections of vibration decreasing ratio on bearing,stake diameter and initial stiffness in several working conditions.The setting expansion bearing on continuous bridge is conducive to shock resistance,and separate seismic design for the anchor block in the bridge anti-earthquake is in favor of safety.The result of research shows that seismic design for continuous bridge should consider the frictional effect of expansion bearing,and the determination of the best friction coefficient should consider the influence of bridge structure stiffness and model simplified system.
引文
[1]李立峰,吴文朋,黄佳梅,等.地震作用下中等跨径RC连续梁桥系统易损性研究[J].土木工程学报,2012,45(10):152-160.Li Lifeng,Wu Wenpeng,Huang Jiamei,et al.Study on system vulnerabilityof medium span reinforced concrete continuous girder bridge underearthquake excitation[J].China Civil Engineering Journal,2012,45(10):152-160.
[2]夏修身,陈兴冲,王常峰,等.桥梁震害分析与合理抗震体系研究[J].工程抗震与加固改造,2011,33(6):132-136.Xia Xiushen,Chen Xingchong,Wang Changfeng,et al.Bridge damageanalysis and reasonable seismic systems[J].Earthquake ResistantEngineering and Retrofitting,2011,33(6):132-136.
[3]李立峰,吴文朋,黄佳梅,等.板式橡胶支座地震易损性分析[J].湖南大学学报:自然科学版,2011,38(11):1-6.Li Lifeng,Wu Wenpeng,Huang Jiamei,et al.Research on the SeismicVulnerability Analysis of Laminated Rubber Bearing[J].Journal of HunanUniversity:Natural Sciences,2011,38(11):1-6.
[4]赵桂峰,马玉宏,张永山.弹塑性缓冲限位与滞变-摩擦并联隔震体系参数分析[J].建筑结构学报,2013,34(1):131-138.Zhao Guifeng,Ma Yuhong,Zhang Yongshan.Analysis on parameters ofhysteretic-friction isolated system with elastic-plastic displacement-constraintdevice[J].Journal of Building Structures,2013,34(1):131-138.
[5]陈兴冲,王常峰,夏修身.活动支座摩擦作用对连续梁桥固定支座剪力的影响[J].世界地震工程,2012,28(2):14-19.Chen Xingchong,Wang Changfeng,Xia Xiushen.Friction effect ofmovable support on fixed support shear force of continuous beambridge[J].World Earthouake engineering,2012,28(2):14-19.
[6]张常勇,钟铁毅,顾正伟,等.铁路连续梁桥铅芯橡胶支座优化设计研究[J].铁道学报,2012,34(5):97-102.Zhang Changyong,Zhon Tieyi,Gu Zhengwei1,et al.Study on OptimalDesign of Lead-rubber Bearings for Railway Continuous Beam Bridges[J].Journal of the China Railway Society,2012,34(5):97-102.
[7]丁涛,殷志祥,基于ANSYS的桥梁强迫振动分析[J].辽宁工程技术大学学报:自然科学版,2005,24(S2):87-89.Ding Tao Yin Zhixiang.Compulsive vibration analysis of bridge basedon ANSYS[J].Journal of Liaoning Technical University:NaturalScience,2005,24(S2):87-89.
[8]王兰,王明.曲线连续梁桥的地震响应分析[J].公路,2013(1):137-143.Wang Lan,Wang Ming.Analysis of seismic response of curved continuousbeam bridge[J].Highway.2013(1):137-143.
[9]杨风利,钟铁毅,夏禾.芯橡胶桥梁隔震支座屈服比的优化及设计应用[J].中国铁道科学,2010,31(2):34-39.Yang Fengli,Zhon Tieyi,Xia He.Optimization study on the yield ratio ofseismically isolated lead rubber bridge bearing and its designapplication[J].China Railway Science,2010,31(2):34-39.
[10]王江波,贺金海,袁万城.近场地震作用下采用拉索减震支座桥梁纵向地震响应特性[J].结构工程师,2012,28(5):82-88.Wang Jiangbo,He Jinhai,Yuan Wancheng.Influence of near-faultground motion characteristics on seismic responses of continuousbeam bridges using cable-sliding friction aseismic bearing(CSFAB)[J].Structural Engineers,,2012,28(5):82-88.
[2]夏修身,陈兴冲,王常峰,等.桥梁震害分析与合理抗震体系研究[J].工程抗震与加固改造,2011,33(6):132-136.Xia Xiushen,Chen Xingchong,Wang Changfeng,et al.Bridge damageanalysis and reasonable seismic systems[J].Earthquake ResistantEngineering and Retrofitting,2011,33(6):132-136.
[3]李立峰,吴文朋,黄佳梅,等.板式橡胶支座地震易损性分析[J].湖南大学学报:自然科学版,2011,38(11):1-6.Li Lifeng,Wu Wenpeng,Huang Jiamei,et al.Research on the SeismicVulnerability Analysis of Laminated Rubber Bearing[J].Journal of HunanUniversity:Natural Sciences,2011,38(11):1-6.
[4]赵桂峰,马玉宏,张永山.弹塑性缓冲限位与滞变-摩擦并联隔震体系参数分析[J].建筑结构学报,2013,34(1):131-138.Zhao Guifeng,Ma Yuhong,Zhang Yongshan.Analysis on parameters ofhysteretic-friction isolated system with elastic-plastic displacement-constraintdevice[J].Journal of Building Structures,2013,34(1):131-138.
[5]陈兴冲,王常峰,夏修身.活动支座摩擦作用对连续梁桥固定支座剪力的影响[J].世界地震工程,2012,28(2):14-19.Chen Xingchong,Wang Changfeng,Xia Xiushen.Friction effect ofmovable support on fixed support shear force of continuous beambridge[J].World Earthouake engineering,2012,28(2):14-19.
[6]张常勇,钟铁毅,顾正伟,等.铁路连续梁桥铅芯橡胶支座优化设计研究[J].铁道学报,2012,34(5):97-102.Zhang Changyong,Zhon Tieyi,Gu Zhengwei1,et al.Study on OptimalDesign of Lead-rubber Bearings for Railway Continuous Beam Bridges[J].Journal of the China Railway Society,2012,34(5):97-102.
[7]丁涛,殷志祥,基于ANSYS的桥梁强迫振动分析[J].辽宁工程技术大学学报:自然科学版,2005,24(S2):87-89.Ding Tao Yin Zhixiang.Compulsive vibration analysis of bridge basedon ANSYS[J].Journal of Liaoning Technical University:NaturalScience,2005,24(S2):87-89.
[8]王兰,王明.曲线连续梁桥的地震响应分析[J].公路,2013(1):137-143.Wang Lan,Wang Ming.Analysis of seismic response of curved continuousbeam bridge[J].Highway.2013(1):137-143.
[9]杨风利,钟铁毅,夏禾.芯橡胶桥梁隔震支座屈服比的优化及设计应用[J].中国铁道科学,2010,31(2):34-39.Yang Fengli,Zhon Tieyi,Xia He.Optimization study on the yield ratio ofseismically isolated lead rubber bridge bearing and its designapplication[J].China Railway Science,2010,31(2):34-39.
[10]王江波,贺金海,袁万城.近场地震作用下采用拉索减震支座桥梁纵向地震响应特性[J].结构工程师,2012,28(5):82-88.Wang Jiangbo,He Jinhai,Yuan Wancheng.Influence of near-faultground motion characteristics on seismic responses of continuousbeam bridges using cable-sliding friction aseismic bearing(CSFAB)[J].Structural Engineers,,2012,28(5):82-88.
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