海底管线地震应力影响分析
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摘要
基于Biot动力固结理论建立海床-管线相互作用的计算模型。利用粘弹性人工边界,以大型有限元软件ADINA为平台对El Centro地震波作用下的海底管线的动力响应进行分析,重点讨论管线覆盖层几何形状以及海床土各向异性对海床土体的孔隙水压力和管线内应力的影响,更为实际地反映了海底管线的地震应力作用。
Based on the Biot′s theory of consolidation,the model of the seabed-pipeline interaction is established using viscous-elastic artificial boundary in this paper.The distribution of the pore pressure in seabed soil and the dynamic response of submarine pipeline are studied under El Centro seismic wave by virtue of the general-purpose FEM analysis package ADINA.The effects of geometry of cover layer and the elastic anisotropic soil behaviors on seismic-induced pore pressure and internal stresses are discussed emphatically.It actually shows the validity and practicality of dynamic response of submarine pipeline under seismic loading.
Based on the Biot′s theory of consolidation,the model of the seabed-pipeline interaction is established using viscous-elastic artificial boundary in this paper.The distribution of the pore pressure in seabed soil and the dynamic response of submarine pipeline are studied under El Centro seismic wave by virtue of the general-purpose FEM analysis package ADINA.The effects of geometry of cover layer and the elastic anisotropic soil behaviors on seismic-induced pore pressure and internal stresses are discussed emphatically.It actually shows the validity and practicality of dynamic response of submarine pipeline under seismic loading.
引文
[1]孙政策,段梦兰,张文,等.海底管线抗震设计的极限地震应力计算法[J].应用力学学报,2006,23(3):440-446.
[2]Turcotte B R,Liu P L F,Kulhawy F H.Laboratory evaluation of wave tank parameters for wave-sediment interaction[R].Joseph H.DeFree Hydraulic Laboratory Report 84-1,School of Civil and Environmental Engineering,Cornell University,New York:Cornell Uni-versity,1984.
[3]Wang X,Jeng D S,Lin Y S.Effects of a cover layer on wave-induced pore pressure around a buried pipe in an anisotropic seabed[J].Ocean Engineering,2000,27:823-839.
[4]曲鹏,栾茂田,郭莹,等.波浪作用下饱和海床-管线动力相互作用的有限元分析[A].第七届全国土动力学学术会议论文集[C].北京:清华大学出版社,2006.446-453.
[5]周晶,李昕,刘亚坤,等.海底悬跨管道动力响应的试验研究和数值模拟[J].工程力学,2003,20(2):21-25.
[6]邹德高,孔宪京,娄树莲,等.饱和砂土地基中地下管线的振动台试验数值模拟分析[J].水利学报,2004,(12):112-119.
[7]刘晶波,吕彦东.结构-地基动力相互作用问题分析的一种直接方法[J].土木工程学报,1998,31(3):55-64.
[8]Lysmer J,Kuhlemeyer R L.Finite dynamic model for infinite media[J].Journal of Engineering Mechanics Division,ASCE,1969,95:859-877.
[9]邱流潮,金峰.地震分析中人工边界处理与地震动输入方法研究[J].岩土力学,2006,27(9):1501-1504.
[10]Guddati M N,Tassoulas J L.Characteristics methods for transient analysis of wave propagation in unbounded media[J].ComputerMethods in Applied Mechanicsand Engineering,1998,164:187-206.
[11]Pickering D J.Anisotropic elastic parameters for soil[J].Geotechnique,1970,20(3):271-276.
[2]Turcotte B R,Liu P L F,Kulhawy F H.Laboratory evaluation of wave tank parameters for wave-sediment interaction[R].Joseph H.DeFree Hydraulic Laboratory Report 84-1,School of Civil and Environmental Engineering,Cornell University,New York:Cornell Uni-versity,1984.
[3]Wang X,Jeng D S,Lin Y S.Effects of a cover layer on wave-induced pore pressure around a buried pipe in an anisotropic seabed[J].Ocean Engineering,2000,27:823-839.
[4]曲鹏,栾茂田,郭莹,等.波浪作用下饱和海床-管线动力相互作用的有限元分析[A].第七届全国土动力学学术会议论文集[C].北京:清华大学出版社,2006.446-453.
[5]周晶,李昕,刘亚坤,等.海底悬跨管道动力响应的试验研究和数值模拟[J].工程力学,2003,20(2):21-25.
[6]邹德高,孔宪京,娄树莲,等.饱和砂土地基中地下管线的振动台试验数值模拟分析[J].水利学报,2004,(12):112-119.
[7]刘晶波,吕彦东.结构-地基动力相互作用问题分析的一种直接方法[J].土木工程学报,1998,31(3):55-64.
[8]Lysmer J,Kuhlemeyer R L.Finite dynamic model for infinite media[J].Journal of Engineering Mechanics Division,ASCE,1969,95:859-877.
[9]邱流潮,金峰.地震分析中人工边界处理与地震动输入方法研究[J].岩土力学,2006,27(9):1501-1504.
[10]Guddati M N,Tassoulas J L.Characteristics methods for transient analysis of wave propagation in unbounded media[J].ComputerMethods in Applied Mechanicsand Engineering,1998,164:187-206.
[11]Pickering D J.Anisotropic elastic parameters for soil[J].Geotechnique,1970,20(3):271-276.
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