连梁装置对斜拉桥与引桥碰撞影响分析
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摘要
由于斜拉桥与引桥的动力特性存在较大差异,在地震作用下斜拉桥与引桥存在发生非同向振动的可能,进而引起碰撞响应,并导致伸缩缝破坏或落梁震害.目前针对大跨度斜拉桥与引桥之间碰撞问题的研究还不够深入,且对于斜拉桥与引桥之间防碰撞措施的研究还不够系统,为此,研究了连梁装置对斜拉桥与引桥之间碰撞响应的减震效果,分析了连梁装置结构参数对斜拉桥与引桥之间碰撞响应的影响规律.研究表明:受拉连梁装置可以有效减小相邻梁体间相对位移,并且能明显减小碰撞力峰值,是一个较为理想的斜拉桥与引桥之间的防碰撞措施,但对引桥梁体位移以及引桥固定墩地震需求的影响较为复杂.
Dynamic characteristics between the cable-stayed bridge and the approach-bridge are different.It the out-of-phase vibrations may happen under horizontal earthquake effect.Then lead to collision response,cause expansion joint damage and beam collapse.Aiming at the research on the collision problem between the big span cable-stayed bridge and approach span is not overall deeply,the anti-collision measures study between cable-stayed bridge and approach span is not systematical enough,The unseating prevention devices shock absorption effect on the collision of cable-stayed bridge and approach span is researched,the influence law of unseating prevention devices on the collision of cable-stayed bridge and approach span is analyzed systematically.The results show that unseating prevention devices can reduce the relative displacement of adjacent beams and collision force peak.Unseating prevention devices are perfect prevent collision measure between cable-stayed bridge and approach span,But the influence of approach span's displacement and approach span fixed pier seismic requirements are rather complex.
Dynamic characteristics between the cable-stayed bridge and the approach-bridge are different.It the out-of-phase vibrations may happen under horizontal earthquake effect.Then lead to collision response,cause expansion joint damage and beam collapse.Aiming at the research on the collision problem between the big span cable-stayed bridge and approach span is not overall deeply,the anti-collision measures study between cable-stayed bridge and approach span is not systematical enough,The unseating prevention devices shock absorption effect on the collision of cable-stayed bridge and approach span is researched,the influence law of unseating prevention devices on the collision of cable-stayed bridge and approach span is analyzed systematically.The results show that unseating prevention devices can reduce the relative displacement of adjacent beams and collision force peak.Unseating prevention devices are perfect prevent collision measure between cable-stayed bridge and approach span,But the influence of approach span's displacement and approach span fixed pier seismic requirements are rather complex.
引文
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[7]李建中,范立础.非规则梁桥纵向地震响应及碰撞效应[J].土木工程学报,2005,38(1):84-90.LI Jian-zhong,FAN Li-chu.Longitudinal seismic responseand pounding effects of girder bridges with unconventionalconfigurations[J].China Civil Engineering Journal,2005,38(1):84-90.(in Chinese)
[8]王东升,王国新,冯启民.桥梁结构地震响应邻梁碰撞分析等效刚体模型[J].工程力学,2004,21(4):81-85.WANG Dong-sheng,WANG Guo-xin,FENG Qi-min.Equivalent rigid-body compact model of pounding betweenadjacent bridge girders during earthquakes[J].Engineering Mechanics,2004,21(4):81-85.(inChinese)
[9]张文学,李程华.大跨度斜拉桥与引桥的碰撞分析及防碰撞措施研究[R].南昌:江西省交通厅科技处,2011.
[10]邓育林,彭天波,李建中.强震作用下大跨斜拉桥伸缩缝处碰撞效应的影响研究[J].振动与冲击,2011,30(6):26-30.DENG Yu-lin,PENG Tian-bo,LI Jian-zhong.Effect ofpounding at expansion joints on seismic response of long-span cable-stayed bridge under strong earthquake[J].Journal of Vibration and Shock,2011,30(6):26-30.(in Chinese)
[11]徐略勤,李建中,吴陶晶.碰撞效应对非规则梁桥横向地震反应的影响[J].振动与冲击,2011,30(4):95-99,123.XU Lue-qin,LI Jian-zhong,WU Tao-jing.Influence ofpounding effects on transverse seismic response of anonstandard girder bridge[J].Journal of Vibration andShock,2011,30(4):95-99,123.(in Chinese)
[12]亓兴军,申永刚.地震作用下曲线梁桥非均匀碰撞效应研究[J].振动与冲击,2012,31(6):72-76.QI Xing-jun,SHEN Yong-gang.Uneven distribution ofpounding effect in a curved girder bridge underearthquake[J].Journal of Vibration and Shock,2012,31(6):72-76.(in Chinese)
[2]王军文.非规则梁桥在地震作用下的碰撞效应及防落梁措施研究[D].上海:同济大学土木工程学院,2005.WANG Jun-wen.The study on seismic response withpounding effect of irregular girder bridges and falling-offprevention devices[D].Shanghai:College of CinilEngineering,Tongji University,2005.(in Chinese)
[3]KIM Sang-hyo,LEE Sang-woo,MHA Ho-seong Source.Dynamic behaviors of the bridge considering pounding andfriction effects under seismic excitations[J].StructuralEngineering and Mechanics,2001,10(6):621-633.
[4]SAIDI M,MARAGAKIS E,FENG S.Parameters inbridge restrainer design for seismic retrofit[J].Journal ofStructural Engineering,1996,122(1):61-68.
[5]IZUNO K,KOBAYASHI H,KAMATA K.Demandcapacity for unseating prevention cable to support fallinggirder[J].Journal of Structure Mechanics and EarthquakeEngineering,2001,668(I 54):319-324.
[6]CHAU K T,WEI X X.Pounding of structures modelled asnon-linear impacts of two oscillators[J].EarthquakeEngng Struct Dyn,2001,30:633-651.
[7]李建中,范立础.非规则梁桥纵向地震响应及碰撞效应[J].土木工程学报,2005,38(1):84-90.LI Jian-zhong,FAN Li-chu.Longitudinal seismic responseand pounding effects of girder bridges with unconventionalconfigurations[J].China Civil Engineering Journal,2005,38(1):84-90.(in Chinese)
[8]王东升,王国新,冯启民.桥梁结构地震响应邻梁碰撞分析等效刚体模型[J].工程力学,2004,21(4):81-85.WANG Dong-sheng,WANG Guo-xin,FENG Qi-min.Equivalent rigid-body compact model of pounding betweenadjacent bridge girders during earthquakes[J].Engineering Mechanics,2004,21(4):81-85.(inChinese)
[9]张文学,李程华.大跨度斜拉桥与引桥的碰撞分析及防碰撞措施研究[R].南昌:江西省交通厅科技处,2011.
[10]邓育林,彭天波,李建中.强震作用下大跨斜拉桥伸缩缝处碰撞效应的影响研究[J].振动与冲击,2011,30(6):26-30.DENG Yu-lin,PENG Tian-bo,LI Jian-zhong.Effect ofpounding at expansion joints on seismic response of long-span cable-stayed bridge under strong earthquake[J].Journal of Vibration and Shock,2011,30(6):26-30.(in Chinese)
[11]徐略勤,李建中,吴陶晶.碰撞效应对非规则梁桥横向地震反应的影响[J].振动与冲击,2011,30(4):95-99,123.XU Lue-qin,LI Jian-zhong,WU Tao-jing.Influence ofpounding effects on transverse seismic response of anonstandard girder bridge[J].Journal of Vibration andShock,2011,30(4):95-99,123.(in Chinese)
[12]亓兴军,申永刚.地震作用下曲线梁桥非均匀碰撞效应研究[J].振动与冲击,2012,31(6):72-76.QI Xing-jun,SHEN Yong-gang.Uneven distribution ofpounding effect in a curved girder bridge underearthquake[J].Journal of Vibration and Shock,2012,31(6):72-76.(in Chinese)
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