全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用:99美元

查看量下载量

相关文章

更多...

考虑波流影响的深水群桩基础桥墩地震反应分析

, PP. 170-177

Keywords: Morison公式,波流力,群桩基础,深水桥墩,地震反应

Full-Text   Cite this paper   Add to My Lib

Abstract:

用基于ABAQUS软件为平台的平行计算技术,对考虑波流影响的地基土-群桩-桥墩体系进行三维非线性地震反应数值模拟,土体和墩台以八节点等参单元离散,桩以梁单元离散,采用土体黏塑性记忆型嵌套面本构模型描述土的动力特性,采用动力塑性损伤模型描述混凝土的动力特性;基于Morison公式,采用Stokes五阶波浪理论描述表面波流,波浪力以分布力的形式施加于桥墩之上,分析了考虑和不考虑波流作用时不同地震动作用下群桩基础桥墩的地震反应特性,结果表明波流作用对桩体加速度反应的影响很小,但对桩体相对位移和弯矩的影响显著,波流作用使桩体弯矩和顺流向的相对位移增大、逆流向的相对位移减小,其影响幅度随流速的增大而增大,波流作用与输入地震动特性密切相关。考虑波流作用对深水大型桥梁群桩基础桥墩地震反应的影响是有必要的。

References

[1]  Liaw C Y,Chopra A K.Dynamics of towers surrounded by water [J].Earthq.Eng.and Structural Dynamics.1974,3(1):65-72.
[2]  Bang Fuh,Chen.3D Nonlinear Hydrodynamic analysis of verticalcylinder during earthquakes.I:Rigid motion[J].Engrg.Mech.,ASCE,1997,123 (5):458-465.
[3]  Yamada Y,Kawano K,Iemura H,et al. Wave and earthquake response of offshore structures with soil structureinteraction [C] The Japan Society of Civil Engineers.1988:157-166.
[4]  Karadeniz,H.Spectralanalys is of offshore structures under combinedwave and earthquake loadings[C] 9th International ConfonOffshore and Polar Eng.Brest:ISOPE,1999:504-511.
[5]  Fukusumi T,U chida,N,Takahashi,D.Response characteristics of softsettled type of offshore structures subjected to harmonic seawaveand earthquake wave[C] 13th International Con.on Of fshore and Polar Eng.Honolulu:Iternational Society of Offshore and Polar Engineers,2003:1007-1012.
[6]  Etemad A K,Gharabagi A RM,Ch enaghlou M R.Nonlinear dynamic behavior of fixed jacket type offshore platfomrs subjected to smiu ltaneously acting wave and earthquake loads[C] 23rd International Conf.on Offshore Mech.and Arctic Eng.Vancouver: American Society of Mechanical Engineers,2004:893-900.
[7]  Abbasi M,Gharabaghi ARM.Study the effect of wavedirectionality on dynamicn onlinear behavior of jack up subjected to wave and earthquake loading[C] 26th International Conf.on Offshore Mech.and Arctic Eng.San Diego:American Society of Mechanical Engineers,2007:377-384.
[8]  李富荣,陈国兴,王志华.考虑动水压力影响的单柱式桥墩地震反应分析 [J].地震工程与工程振动,2008,28(2):55-59.
[9]  何晓宇,李宏男.波浪与地震对小尺度桩柱的共同作用研究 [J].地震工程与工程振动,2007,27(5):139-145.
[10]  Morison J R,O Brien M P,Johnson JW,et al.The force exerted to surface wave on piles [J].Petroleum Transaction,AME,1950,189:149-154.
[11]  Skjelbreia L,Hendrickson J A.Fifthordergravity wavetheory[C] Proc.of 87th Coastal Engineering Conf, 1961.
[12]  白德贵.考虑波流影响的桩基础桥墩地震反应分析 [D].南京:南京工业大学,2008.
[13]  王涛,李家春,呼和敖德,等.波流相互作用对水动力系数的影响 [J].水动力学研究与进展,1995,10(5):551-558.
[14]  庄海洋,陈国兴,朱定华.土体动力黏塑性记忆型嵌套面本构模型及其验证 [J].岩土工程学报,2006,28 (10):1267-1272.
[15]  Jeeho Lee,Gregory L Fenves.Plasticdamagemodel for cyclicloading of concrete structures[J].Journal of Engineering Mechanics,1998(4):892-900.
[16]  刘晶波,王振宇,杜修力,等.波动问题中的三维时域粘弹性人工边界 [J].工程力学,2005,22(6):46-51.

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133