桥墩与水相互作用的振动台试验
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摘要
以南京长江三桥南塔墩作为工程背景,并按照1:50的相似比设计出桥墩的模型,并选取正弦波和天津波作为加载的波形,在无水与有水两种状态下开展了振动台试验.试验数据表明,承台部分的加速度视加载波形峰值的不同有20%到40%的增幅,位移、应变等也有相应的增幅.通过试验得出的动水压力沿高程分布图表明,动水压力的分布与地震波强度明显相关.
Taking the Third Nanjing Yangtze River Bridge as an engineering background,a pile-cap pier model was designed and built by using the similar principles with a scale factor of 1∶50.A shaking table test of this pier model was carried out by loading a sine wave and Tianjin wave in the two cases around water and around air.The result showed that the largest rate of acceleration increased from 20% to 40% under different waves,and the displacement and strain increased accordingly.The curves of earthquake hydrodynamic pressure along pile height indicated that the distribution of pressure was relevant to the intensity of earthquake waves.
Taking the Third Nanjing Yangtze River Bridge as an engineering background,a pile-cap pier model was designed and built by using the similar principles with a scale factor of 1∶50.A shaking table test of this pier model was carried out by loading a sine wave and Tianjin wave in the two cases around water and around air.The result showed that the largest rate of acceleration increased from 20% to 40% under different waves,and the displacement and strain increased accordingly.The curves of earthquake hydrodynamic pressure along pile height indicated that the distribution of pressure was relevant to the intensity of earthquake waves.
引文
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[8]Lai W,Wang J J,Hu S D.Earthquake induced hydrodynamic pressure on bridge pier.JTongji Univ Nat Sci,2004,32(1):1(赖伟,王君杰,胡世德.地震下桥墩动水压力分析.同济大学学报:自然科学版,2004,32(1):1)
[9]Yuan Y C,Lai W,Wang J J,et al,The effects of hydrodynamic damping on seismic response of bridge piles.World InfEarthquake Eng,2005,22(4):88(袁迎春,赖伟,王君杰,等.Morison方程中动水阻力项对桥梁桩柱地震反应的影响.世界地震工程,2005,22(4):88)
[10]Zhang H L,Zhang P,Huang P.Earthquake response of deep water bridge structure.JHighwayTranspRes Dev,2007(9):83(张海龙,张鹏,黄鹏.深水桥梁结构的地震反应分析.公路交通科技,2007(9):83)
[11]Tanaka Y,Hudspeth R T.Restoring forces on vertical circular cylinders forced by earthquake.Earthquake Eng Struct Dyn,1988,16:99
[12]Garritsma I R J.Experimental determination of damping added mass and added mass moment of inertia of a ship model.I.S.P.,1957,14(38):505
[13]Lai W,Wang J J,Wei X,et al.The shaking table test for sub-merged bridge pier.Earthquake Eng Eng Vib,2006(6):165(赖伟,王君杰,韦晓,等.桥墩地震动水效应的水下振动台试验研究.地震工程与工程振动,2006(6):165)
[2]Morison J R,O'Brien MP,Johnson J W,et al.The force exer-ted by surface wave on piles.Pet Trans AIME,1950,189:149
[3]Goto H,Toki K.Vibration characteristics and a seismic design of submerged bridge piers∥Proceedings ofthe3rd World Conference on Earthquake Engineer.New Zealand,1965
[4]Hoshikuma J.Evaluation method of Hydrodynamic Pressure con-sidering structural ductility seismic∥Proceedings ofthe4th Bridge Seismic Design Considering Structural Ductility Seismic.Tokyo,2000(星隈顺一.地震-保有水平耐力法による動水圧の評価∥第4回地震-保有耐力法に基づく橋梁の耐震設計に関するシンポジウム講演論文集.東京,2000)
[5]Zheng S X.The effects of the fluid-structure interaction seismic re-sponse of bridge piers.Bridge Constr,1998(2):52(郑史雄.深水桥墩考虑液固相互作用的地震反应分析.桥梁建设,1998(2):52)
[6]Zhong M Q,Pan Y S.Research progress of bridge seismic re-sponse analysis method considering fluid-structure interaction∥Proceedings ofHighwayScience and Innovation High-Level Forum:Volume ofHighway Design and Construction.Beijing,2001(钟明全,潘亦苏.考虑流体-结构交互作用的桥梁地震反应分析方法的研究进展∥第一届全国公路科技创新高层论坛论文集:公路设计与施工卷.北京,2001)
[7]Xia Z H.Seismic Response Analysis ofLong Span Continuous Rigid Frame Bridges[Dissertation].Chengdu:Southwest Jiaotong Uni-versity,2003(夏志华.大跨度连续刚构桥地震反应分析[学位论文].成都:西南交通大学,2003)
[8]Lai W,Wang J J,Hu S D.Earthquake induced hydrodynamic pressure on bridge pier.JTongji Univ Nat Sci,2004,32(1):1(赖伟,王君杰,胡世德.地震下桥墩动水压力分析.同济大学学报:自然科学版,2004,32(1):1)
[9]Yuan Y C,Lai W,Wang J J,et al,The effects of hydrodynamic damping on seismic response of bridge piles.World InfEarthquake Eng,2005,22(4):88(袁迎春,赖伟,王君杰,等.Morison方程中动水阻力项对桥梁桩柱地震反应的影响.世界地震工程,2005,22(4):88)
[10]Zhang H L,Zhang P,Huang P.Earthquake response of deep water bridge structure.JHighwayTranspRes Dev,2007(9):83(张海龙,张鹏,黄鹏.深水桥梁结构的地震反应分析.公路交通科技,2007(9):83)
[11]Tanaka Y,Hudspeth R T.Restoring forces on vertical circular cylinders forced by earthquake.Earthquake Eng Struct Dyn,1988,16:99
[12]Garritsma I R J.Experimental determination of damping added mass and added mass moment of inertia of a ship model.I.S.P.,1957,14(38):505
[13]Lai W,Wang J J,Wei X,et al.The shaking table test for sub-merged bridge pier.Earthquake Eng Eng Vib,2006(6):165(赖伟,王君杰,韦晓,等.桥墩地震动水效应的水下振动台试验研究.地震工程与工程振动,2006(6):165)
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