改变支座模型对梁式桥地震反应的影响分析
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摘要
针对一座4跨梁式桥在地震作用下的反应,采用大型有限元分析程序ANSYS,选取空间梁单元建立4种模型进行了动力特性分析;并选取3条地震波,进一步对比分析了支座模型改变后连续梁桥和简支梁桥内力和位移的地震反应。结果表明:改变梁式桥支座模型,上部结构在桥台和梁端间伸缩缝处及相邻梁和桥墩间伸缩缝处相对位移的地震反应会明显变大,但桥墩内力和位移的地震反应明显减小,隔震效果显著;合理选择台梁间、墩梁处和相邻梁体间伸缩缝处限位弹簧装置的刚度可以有效地减小上部结构在地震中的相对位移,防止其发生梁端碰撞和落梁破坏。
Aimed at seismic response of a four-span girder bridge,four dynamic calculating model based on 3D girder element were created by finite element analysis program ANSYS.After changing the bearing model,the internal force and displacement responses of continuous girder bridge and simple supported girder bridge subjected to the selected three earthquake waves were analysed.The results indicate that(1) the seismic responses of the relative displacement of superstructure at the expansion joints between abutment and beam end and those between adjacent beam and pier are significantly larger by changing the bearing model of girder bridge,but the seismic response of internal force and displacement of bridge pier decreases obviously and isolation effect is notable;(2) reasonable choice of the restrict spring stiffness at the expansion joints between abutment and beam end and those between adjacent beam and pier can effectively reduce the relative displacement of superstructure in the earthquake to prevent the occurrence of beam end collisions and drop-beam damage.
Aimed at seismic response of a four-span girder bridge,four dynamic calculating model based on 3D girder element were created by finite element analysis program ANSYS.After changing the bearing model,the internal force and displacement responses of continuous girder bridge and simple supported girder bridge subjected to the selected three earthquake waves were analysed.The results indicate that(1) the seismic responses of the relative displacement of superstructure at the expansion joints between abutment and beam end and those between adjacent beam and pier are significantly larger by changing the bearing model of girder bridge,but the seismic response of internal force and displacement of bridge pier decreases obviously and isolation effect is notable;(2) reasonable choice of the restrict spring stiffness at the expansion joints between abutment and beam end and those between adjacent beam and pier can effectively reduce the relative displacement of superstructure in the earthquake to prevent the occurrence of beam end collisions and drop-beam damage.
引文
[1]王东升,杨海红,王国新.考虑邻梁碰撞的多跨长简支梁桥落梁震害分析[J].中国公路学报,2005,18(3):54-59.WANG Dongsheng,YANG Haihong,WANG Guoxin.Seismic Analysis of Girders Falling Down in Multi-spanLong Simply Supported Bridges with Adjacent PoundingEffects[J].China Journal of Highway and Transport,2005,18(3):54-59.
[2]于海龙,朱晞.地震作用下简支梁桥梁间碰撞的反应性能[J].北方交通大学学报,2004,28(1):43-46.YU Hailong,ZHU Xi.Characteristic of PoundingResponse of the Simple-supported Bridges duringEarthquake[J].Journal of Northern Jiaotong University,2004,28(1):43-46.
[3]王军文,李建中,范立础.连续梁桥纵向地震碰撞反应参数研究[J].中国公路学报,2005,18(4):43-47.WANG Junwen,LI Jianzhong,FAN Lichu.ParametricStudy of Longitudinal Seismic Pounding Response forContinuous Girder Bridges[J].China Journal of Highwayand Transport,2005,18(4):43-47.
[4]李忠献,岳福青,周莉,等.考虑地震动空间效应的城市高架桥梁地震碰撞响应分析[J].天津大学学报,2006,39(8):939-943.LI Zhongxian,YUE Fuqing,ZHOU Li,et al.SeismicPounding Responses of Urban Elevated BridgesConsidering Spatial Variation of Ground Motion[J].Journal of Tianjin University,2006,39(8):939-943.
[5]周光伟,李建中,范立础.地震行波输入下连续梁桥支承长度的参数分析[J].湖南大学学报:自然科学版,2008,35(10):7-10.ZHOU Guangwei,LI Jianzhong,FAN Lichu.ParametricStudy of the Required Seating Length for ContinuousBridges under Longitudinal Excitation of Traveling SeismicWave[J].Journal of Hunan University:NaturalSciences,2008,35(10):7-10.
[6]王军文,李建中,范立础.限位装置对连续梁桥地震反应的影响[J].铁道学报,2008,30(3):71-76.WANG Junwen,LI Jianzhong,FAN Lichu.Effects ofRestrainers on Seismic Responses of Continuous BeamBridges[J].Journal of the China Railway Society,2008,30(3):71-76.
[7]王常峰,陈兴冲,朱东生.支座摩擦力对连续梁桥抗震性能的影响[J].工程抗震与加固改造,2006,28(4):72-74.WANG Changfeng,CHEN Xingchong,ZHU Dongsheng.Effects of Friction Force at Movable Supports on Anti-seismic Performance of Continuous Bridge[J].EarthquakeResistant Engineering,2006,28(4):72-74.
[8]孟宪锋,朱晞.近场地震作用下高速铁路简支梁桥的碰撞行为[J].北京交通大学学报,2006,30(4):73-76.MENG Xianfeng,ZHU Xi.Pounding Behavior of High-speed Railway Simple Supported Bridges under the Near-fault Earthquakes[J].Journal of Beijing JiaotongUniversity,2006,30(4):73-76.
[9]彭伟,李建中.非经典阻尼对减隔震连续梁桥地震响应的影响[J].中国公路学报,2008,21(5):63-69.PENG Wei,LI Jianzhong.Influence of Non-classicalDamping on Seismic Response of Isolated SeismicContinuous Girder Bridge[J].China Journal of Highwayand Transport,2008,21(5):63-69.
[10]王志强,葛继平.粘滞阻尼器和Lock-up装置在连续梁桥抗震中应用[J].石家庄铁道学院学报,2006,19(1):5-9.WANG Zhiqiang,GE Jiping.Application of ViscousDamper and Lock-up Devices in the Seismic Design ofContinuous Girder Bridges[J].Journal of ShijiazhuangRailway Institute,2006,19(1):5-9.
[11]陈兴冲,商耀兆,张永亮,等.高墩大跨度铁路简支钢桁梁桥的减震性能分析[J].世界地震工程,2008,24(1):6-11.CHEN Xingchong,SHANG Yaozhao,ZHANG Yongliang,et al.Analysis of Seismic Reduction Performance on theHigh Pier and Long Span Railway Simply-supported SteelTruss Girders[J].World Earthquake Engineering,2008,24(1):6-11.
[12]冯凌云,叶爱君.多跨连续梁桥的减隔震应用研究[J].桥梁建设,2005(6):5-7.FENG Lingyun,YE Aijun.Study of Application ofSeismic Mitigation and Isolation Techniques to Multi-spanContinuous Girder Bridges[J].Bridge Construction,2005(6):5-7.
[13]彭天波,李建中,范立础.双曲面球型减隔震支座的开发及应用[J].同济大学学报:自然科学版,2007,35(2):176-180.PENG Tianbo,LI Jianzhong,FAN Lichu.Developmentand Application of Double Spherical Aseismic Bearing[J].Journal of Tongji University:Natural Science,2007,35(2):176-180.
[14]方海,李升玉,王曙光,等.高烈度区连续梁桥的减震设计方法研究[J].地震工程与工程振动,2005,25(6):178-182.FANG Hai,LI Shengyu,WANG Shuguang,et al.Research on Earthquake-reduction Design Method ofContinuous Girder Bridges in a High-intensity EarthquakeArea[J].Journal of Earthquake Engineering andEngineering Vibration,2005,25(6):178-182.
[15]黄勇.汶川地震中梁式桥的震害和预防震害的新方法[J].地震工程与工程振动,2008,28(5):20-26.HUANG Yong.The Performance of Girder Bridges inWenchuan Earthquake and a New Method for SeismicProtection[J].Journal of Earthquake Engineering andEngineering Vibration,2008,28(5):20-26.
[2]于海龙,朱晞.地震作用下简支梁桥梁间碰撞的反应性能[J].北方交通大学学报,2004,28(1):43-46.YU Hailong,ZHU Xi.Characteristic of PoundingResponse of the Simple-supported Bridges duringEarthquake[J].Journal of Northern Jiaotong University,2004,28(1):43-46.
[3]王军文,李建中,范立础.连续梁桥纵向地震碰撞反应参数研究[J].中国公路学报,2005,18(4):43-47.WANG Junwen,LI Jianzhong,FAN Lichu.ParametricStudy of Longitudinal Seismic Pounding Response forContinuous Girder Bridges[J].China Journal of Highwayand Transport,2005,18(4):43-47.
[4]李忠献,岳福青,周莉,等.考虑地震动空间效应的城市高架桥梁地震碰撞响应分析[J].天津大学学报,2006,39(8):939-943.LI Zhongxian,YUE Fuqing,ZHOU Li,et al.SeismicPounding Responses of Urban Elevated BridgesConsidering Spatial Variation of Ground Motion[J].Journal of Tianjin University,2006,39(8):939-943.
[5]周光伟,李建中,范立础.地震行波输入下连续梁桥支承长度的参数分析[J].湖南大学学报:自然科学版,2008,35(10):7-10.ZHOU Guangwei,LI Jianzhong,FAN Lichu.ParametricStudy of the Required Seating Length for ContinuousBridges under Longitudinal Excitation of Traveling SeismicWave[J].Journal of Hunan University:NaturalSciences,2008,35(10):7-10.
[6]王军文,李建中,范立础.限位装置对连续梁桥地震反应的影响[J].铁道学报,2008,30(3):71-76.WANG Junwen,LI Jianzhong,FAN Lichu.Effects ofRestrainers on Seismic Responses of Continuous BeamBridges[J].Journal of the China Railway Society,2008,30(3):71-76.
[7]王常峰,陈兴冲,朱东生.支座摩擦力对连续梁桥抗震性能的影响[J].工程抗震与加固改造,2006,28(4):72-74.WANG Changfeng,CHEN Xingchong,ZHU Dongsheng.Effects of Friction Force at Movable Supports on Anti-seismic Performance of Continuous Bridge[J].EarthquakeResistant Engineering,2006,28(4):72-74.
[8]孟宪锋,朱晞.近场地震作用下高速铁路简支梁桥的碰撞行为[J].北京交通大学学报,2006,30(4):73-76.MENG Xianfeng,ZHU Xi.Pounding Behavior of High-speed Railway Simple Supported Bridges under the Near-fault Earthquakes[J].Journal of Beijing JiaotongUniversity,2006,30(4):73-76.
[9]彭伟,李建中.非经典阻尼对减隔震连续梁桥地震响应的影响[J].中国公路学报,2008,21(5):63-69.PENG Wei,LI Jianzhong.Influence of Non-classicalDamping on Seismic Response of Isolated SeismicContinuous Girder Bridge[J].China Journal of Highwayand Transport,2008,21(5):63-69.
[10]王志强,葛继平.粘滞阻尼器和Lock-up装置在连续梁桥抗震中应用[J].石家庄铁道学院学报,2006,19(1):5-9.WANG Zhiqiang,GE Jiping.Application of ViscousDamper and Lock-up Devices in the Seismic Design ofContinuous Girder Bridges[J].Journal of ShijiazhuangRailway Institute,2006,19(1):5-9.
[11]陈兴冲,商耀兆,张永亮,等.高墩大跨度铁路简支钢桁梁桥的减震性能分析[J].世界地震工程,2008,24(1):6-11.CHEN Xingchong,SHANG Yaozhao,ZHANG Yongliang,et al.Analysis of Seismic Reduction Performance on theHigh Pier and Long Span Railway Simply-supported SteelTruss Girders[J].World Earthquake Engineering,2008,24(1):6-11.
[12]冯凌云,叶爱君.多跨连续梁桥的减隔震应用研究[J].桥梁建设,2005(6):5-7.FENG Lingyun,YE Aijun.Study of Application ofSeismic Mitigation and Isolation Techniques to Multi-spanContinuous Girder Bridges[J].Bridge Construction,2005(6):5-7.
[13]彭天波,李建中,范立础.双曲面球型减隔震支座的开发及应用[J].同济大学学报:自然科学版,2007,35(2):176-180.PENG Tianbo,LI Jianzhong,FAN Lichu.Developmentand Application of Double Spherical Aseismic Bearing[J].Journal of Tongji University:Natural Science,2007,35(2):176-180.
[14]方海,李升玉,王曙光,等.高烈度区连续梁桥的减震设计方法研究[J].地震工程与工程振动,2005,25(6):178-182.FANG Hai,LI Shengyu,WANG Shuguang,et al.Research on Earthquake-reduction Design Method ofContinuous Girder Bridges in a High-intensity EarthquakeArea[J].Journal of Earthquake Engineering andEngineering Vibration,2005,25(6):178-182.
[15]黄勇.汶川地震中梁式桥的震害和预防震害的新方法[J].地震工程与工程振动,2008,28(5):20-26.HUANG Yong.The Performance of Girder Bridges inWenchuan Earthquake and a New Method for SeismicProtection[J].Journal of Earthquake Engineering andEngineering Vibration,2008,28(5):20-26.
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