波浪作用下考虑桩土相互作用的桩柱响应
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摘要
以一离岸深水桩柱为例,依据JTJ 2132—1998《海港水文规范》的环境条件和环境荷载规范,对桩柱进行有限元离散。在海洋深水环境条件下考虑流固耦合效应,计算了在海洋极端规则波以及不规则波条件下桩柱的运动响应;为了进一步研究分析泥面以下土体对桩柱运动响应的影响,对比分析了在考虑桩土耦合相互作用下桩柱的响应与基岩面固结解下的响应;考虑到海洋地基为两相饱和土介质,对比了在不同简化阻抗处理下的运动响应结果。结果表明,桩土耦合相互作用对于波浪尤其是不规则波作用下的桩柱响应有很大影响,简化阻抗下的运动响应相比两相饱和地基阻抗处理论误差在10%左右,考虑桩土耦合效应对于工程设计具有指导意义和实用价值。
The dynamic response of the piles under extreme waves is investigated according to the Codes of Harbor Hydrology(JTJ 213—1998),we discrete the piles with FEM method and calculate the pile response considering the fluid-structure coupling effect in deep sea water environment.For further researching the pile-soil interaction,we carry out a comparative analysis with that under different pile-soil conditions.Results show that the pile-soil interaction has a great impact on the pile response in the open sea environment.The pile response under saturated soil has an error of 10% comparing with that under simplified impedence.
The dynamic response of the piles under extreme waves is investigated according to the Codes of Harbor Hydrology(JTJ 213—1998),we discrete the piles with FEM method and calculate the pile response considering the fluid-structure coupling effect in deep sea water environment.For further researching the pile-soil interaction,we carry out a comparative analysis with that under different pile-soil conditions.Results show that the pile-soil interaction has a great impact on the pile response in the open sea environment.The pile response under saturated soil has an error of 10% comparing with that under simplified impedence.
引文
[1]曲乃泗.水中空间结构对随机地震的反应[J].地震工程与工程振动,1986,6(1):61-71.
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[3]吴锋.港口工程水平受荷桩m值的确定[J].水运工程2010(1):32-34.
[4]张玉红,王忠建,曾小明.分层饱和土中横向受荷桩动力阻抗分析方法[J].水运工程,2004(11):13-16.
[5]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):41-48.
[6]Novak M,Mitwally H.Random rsponse of offshore towers withpile-soil-pile interaction[J].Journal of Offshore Mechanicsand Arctic Engineering,1990(2):35-41.
[7]George Gazetas,Ricardo Dobry.Horizontal response of pilesin layered soils[J].Journal of Geotechnical Engineering,1984,110(1):20-40.
[8]Novak M,Aboul-ella F.Dynamic stiffness and damping ofpiles[J].Canadian Geotechnical Journal,1974,(11):574-598.
[9]Biot M A.Theory of propagation of elastic waves in afluid-saturated poroussolid[J].Acoust Soc Am,1956,28(2):168-191.
[10]尚守平,余俊,王海东,等.饱和土中桩水平振动分析[J].岩土工程学报,2007,29(11):1696-1702.
[11]俞聿修,柳淑学.随机波浪及其工程应用[M].大连:大连理工大学出版社,2003.
[2]吴智平,罗传信.平稳过滤白噪声激励下海洋桩基平台响应分析[J].海洋工程,1995,11(4):38-46.
[3]吴锋.港口工程水平受荷桩m值的确定[J].水运工程2010(1):32-34.
[4]张玉红,王忠建,曾小明.分层饱和土中横向受荷桩动力阻抗分析方法[J].水运工程,2004(11):13-16.
[5]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):41-48.
[6]Novak M,Mitwally H.Random rsponse of offshore towers withpile-soil-pile interaction[J].Journal of Offshore Mechanicsand Arctic Engineering,1990(2):35-41.
[7]George Gazetas,Ricardo Dobry.Horizontal response of pilesin layered soils[J].Journal of Geotechnical Engineering,1984,110(1):20-40.
[8]Novak M,Aboul-ella F.Dynamic stiffness and damping ofpiles[J].Canadian Geotechnical Journal,1974,(11):574-598.
[9]Biot M A.Theory of propagation of elastic waves in afluid-saturated poroussolid[J].Acoust Soc Am,1956,28(2):168-191.
[10]尚守平,余俊,王海东,等.饱和土中桩水平振动分析[J].岩土工程学报,2007,29(11):1696-1702.
[11]俞聿修,柳淑学.随机波浪及其工程应用[M].大连:大连理工大学出版社,2003.
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