海底锚固悬浮隧道所受动水压力研究-P波
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摘要
为研究地震作用下悬浮隧道所受动水压力规律,推导了平面P波从海底岩土斜入射到与海水的交界面时,作用在海底锚固悬浮隧道上的动水压力公式.基于位移势函数理论,讨论不同海底岩土参数与入射P波的不同频率和方向以及锚索的刚度和间距对作用在海底锚固悬浮隧道上的动水压力的影响.结果表明,海底岩土剪切模量、P波的频率和方向以及锚索的弹簧刚度和间距对悬浮隧道所受的动水压力有较大影响,海底岩土泊松比和密度的影响较小.
To study the hydrodynamic pressure rule on submerged floating tunnel under the earthquake,the formulae for determining the hydrodynamic pressure were deduced with the oblique incidence of plane P-wave.Based on displacement potential functions,effects of different submarine rock and soil parameters and different frequencies and directions of incident P-wave,as well as different spring constants and spaces of the tethers on the hydrodynamic pressure were discussed.It can be concluded that the submarine rock and soil shear modulus,the spring constant and the spacing of the tether,and the direction and frequency of incident P-wave have a significant effect on the hydrodynamic pressure,while the Poisson ratio and density of submarine rock and soil have little influence on it.
To study the hydrodynamic pressure rule on submerged floating tunnel under the earthquake,the formulae for determining the hydrodynamic pressure were deduced with the oblique incidence of plane P-wave.Based on displacement potential functions,effects of different submarine rock and soil parameters and different frequencies and directions of incident P-wave,as well as different spring constants and spaces of the tethers on the hydrodynamic pressure were discussed.It can be concluded that the submarine rock and soil shear modulus,the spring constant and the spacing of the tether,and the direction and frequency of incident P-wave have a significant effect on the hydrodynamic pressure,while the Poisson ratio and density of submarine rock and soil have little influence on it.
引文
[1]KUNISU H,MIZUNO S,MIZUNO Y,et al.Study onSubmerged Floating Tunnel Characteristics Under theWave Condition[C]//Proceedings of the Forth(1994)International Offshore and Polar Engineering Confer-ence,April 10-15,1994,Osaka,Japan,[s.1]:ISOPE,c1994:27-32.
[2]VENKATARAMANA K,YOSHIHARA S,TOYODA S,et al.Current-Induced Vibrations of Submerged Float-ing Tunnels[C].//Proceedings of the Sixth(1996)In-ternational Offshore and Polar Engineering Conference,May 26-31,1996,Los Angeles,California,[s.1]:ISOPE,c1996:111-118.
[3]REMSETH S,LEIRA J B,OKSTAD M K,et al.Dy-namic response and fluid/structure interaction of sub-merged floating tunnels[J].Computers and Structures,1999,72:659-685.
[4]麦继婷,罗忠贤,关宝树.流作用下悬浮隧道张力腿的涡激动力响应[J].西南交通大学学报,2004,39(5):600-604.
[5]麦继婷,罗忠贤,关宝树.波流作用下悬浮隧道的涡激动力响应[J].铁道学报,2005,2 7(1):102-105.
[6]MORITAS,YAMASHITAT,MIZUNO Y,et al.Earth-quake Response Analysis of Submerged Floating TunnelsConsidering Water Compressibility[C]//Proceedings ofthe Forth(1994)International Offshore and Polar Engi-neering Conference,April 10-15,1994,Osaka,Ja-pan,[s.1]:ISOPE,c1994:20-26.
[7]FOGAZZI P,PEROTTI F.The dynamic response ofseabed anchored floating tunnels under seismic excita-tion[J].Earthquake Engineering and Structural Dy-namics,2000,29:273-295.
[8]FAGGIANO B,MAZZOLANI F,LANDOLFO R.De-sign and modeling aspects concerning the submergedfloating tunnel:an application to the Messina Straitcrossing[C]//Strait Crossing 2001,September 2-5,2001,Bergen,Norway,Krobeborg:Swets&ZeitlingerPublishers Lisse,c2001,511-519.
[9]郭自强.固体中的波[M].北京:地震出版社,1982.
[2]VENKATARAMANA K,YOSHIHARA S,TOYODA S,et al.Current-Induced Vibrations of Submerged Float-ing Tunnels[C].//Proceedings of the Sixth(1996)In-ternational Offshore and Polar Engineering Conference,May 26-31,1996,Los Angeles,California,[s.1]:ISOPE,c1996:111-118.
[3]REMSETH S,LEIRA J B,OKSTAD M K,et al.Dy-namic response and fluid/structure interaction of sub-merged floating tunnels[J].Computers and Structures,1999,72:659-685.
[4]麦继婷,罗忠贤,关宝树.流作用下悬浮隧道张力腿的涡激动力响应[J].西南交通大学学报,2004,39(5):600-604.
[5]麦继婷,罗忠贤,关宝树.波流作用下悬浮隧道的涡激动力响应[J].铁道学报,2005,2 7(1):102-105.
[6]MORITAS,YAMASHITAT,MIZUNO Y,et al.Earth-quake Response Analysis of Submerged Floating TunnelsConsidering Water Compressibility[C]//Proceedings ofthe Forth(1994)International Offshore and Polar Engi-neering Conference,April 10-15,1994,Osaka,Ja-pan,[s.1]:ISOPE,c1994:20-26.
[7]FOGAZZI P,PEROTTI F.The dynamic response ofseabed anchored floating tunnels under seismic excita-tion[J].Earthquake Engineering and Structural Dy-namics,2000,29:273-295.
[8]FAGGIANO B,MAZZOLANI F,LANDOLFO R.De-sign and modeling aspects concerning the submergedfloating tunnel:an application to the Messina Straitcrossing[C]//Strait Crossing 2001,September 2-5,2001,Bergen,Norway,Krobeborg:Swets&ZeitlingerPublishers Lisse,c2001,511-519.
[9]郭自强.固体中的波[M].北京:地震出版社,1982.
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