地震作用下桥梁结构-水相互作用分析
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摘要
采用动水附加质量的方法计算地震作用下深水高桩承台体系桥梁的结构-水相互作用。采用附加质量和阻尼系数矩阵的解析解来求解承台上的动水力;单桩的附加质量采用莫里森方程求解,并用群桩系数修正群桩体系中各单桩的附加质量。最后通过一个实桥的算例阐述了考虑结构-水相互作用的动水效应计算方法。
The structure-water interaction of elevated pile cap bridge under earthquake action was studied in this paper.Added mass approach was adopted to account for the hydrodynamic effects due to earthquakes.The hydrodynamic added masses of pile caps were calculated by the concise closed form expressions.Morison Equation was applied to calculate the added mass of a single pile.Grouping effect of piles was considered by correcting the single pile's calculated hydrodynamic added mass with grouping effect coefficient.Finally,the calculation method with structure-water interaction was discussed with an example of bridge.
The structure-water interaction of elevated pile cap bridge under earthquake action was studied in this paper.Added mass approach was adopted to account for the hydrodynamic effects due to earthquakes.The hydrodynamic added masses of pile caps were calculated by the concise closed form expressions.Morison Equation was applied to calculate the added mass of a single pile.Grouping effect of piles was considered by correcting the single pile's calculated hydrodynamic added mass with grouping effect coefficient.Finally,the calculation method with structure-water interaction was discussed with an example of bridge.
引文
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[2]唐寰澄.世界跨海工程规划概况[M]∥中国土木工程学会桥梁及结构工程学会第十二届年会论文集(上册),1996.Tang H C.Overview of sea-crossing engineeringsplanning in the world[M]∥Proceedings of 12thannual meeting of Bridge and Structural EngineeringBranch of China Civil Engineering Society,1996.(inChinese)
[3]黄宏伟,张冬梅,徐凌,等.国内外桥梁深基础形式的现状[J].公路交通科技,2002,19(4):60-64.Huang H W,Zhang D M,Xu L,et al.The state-of-artof deep foundation in bridge engineering[J].Joural ofHighway and Transportation Research andDevelopment,2002,19(4):60-64.(in Chinese)
[4]郭征红,徐伟.深水群桩基础的关键施工技术研究[J].结构工程师,2007,23(6):70-73.Guo Z H,Xu W.Research on key constructiontechniques for pile group foundations in deep water[J].Structural Engineers,2007,23(6):70-73.(inChinese)
[5]Westergarrd HM.Water pressures on dams duringearthquakes[J].Trans ASCE 1933,59(8):418-433.
[6]Morison J R,O'Brien M P,Johnson J W,et al.Theforce exerted to surface wave on piles.PetroleumTransaction[J].AIME,1950,189:149-154.
[7]MacCamy R C,Fuchs R A.Wave forces on piles:adiffraction theory[J].US Army Corps of Engineering,Beach Erosion Board,1954,69:75-86.
[8]Bhatta D D,Rahman M.On scattering and radiationproblem for a cylinder in water of finite depth[J].International Journal of Engineering Science,2003,41:931-967.
[9]赖伟.地震和波浪作用下深水桥梁的动力响应研究[D].上海:同济大学,2004.Lai W.Dynamic interaction between deep-waterbridges and water during earthquakes and waves[D].Shanghai:Doctorate degree thesis of TongjiUniversity,2004.(in Chinese)
[10]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[J].世界地震工程,2005,21(4):88-94.Yuan Y C,Lai W,Wang J J,et al.The effects ofhydrodynamic damping on seismic response of bridgepiles[J].World Earthquake Engineering,2005,21(4):88-94.(in Chinese)
[2]唐寰澄.世界跨海工程规划概况[M]∥中国土木工程学会桥梁及结构工程学会第十二届年会论文集(上册),1996.Tang H C.Overview of sea-crossing engineeringsplanning in the world[M]∥Proceedings of 12thannual meeting of Bridge and Structural EngineeringBranch of China Civil Engineering Society,1996.(inChinese)
[3]黄宏伟,张冬梅,徐凌,等.国内外桥梁深基础形式的现状[J].公路交通科技,2002,19(4):60-64.Huang H W,Zhang D M,Xu L,et al.The state-of-artof deep foundation in bridge engineering[J].Joural ofHighway and Transportation Research andDevelopment,2002,19(4):60-64.(in Chinese)
[4]郭征红,徐伟.深水群桩基础的关键施工技术研究[J].结构工程师,2007,23(6):70-73.Guo Z H,Xu W.Research on key constructiontechniques for pile group foundations in deep water[J].Structural Engineers,2007,23(6):70-73.(inChinese)
[5]Westergarrd HM.Water pressures on dams duringearthquakes[J].Trans ASCE 1933,59(8):418-433.
[6]Morison J R,O'Brien M P,Johnson J W,et al.Theforce exerted to surface wave on piles.PetroleumTransaction[J].AIME,1950,189:149-154.
[7]MacCamy R C,Fuchs R A.Wave forces on piles:adiffraction theory[J].US Army Corps of Engineering,Beach Erosion Board,1954,69:75-86.
[8]Bhatta D D,Rahman M.On scattering and radiationproblem for a cylinder in water of finite depth[J].International Journal of Engineering Science,2003,41:931-967.
[9]赖伟.地震和波浪作用下深水桥梁的动力响应研究[D].上海:同济大学,2004.Lai W.Dynamic interaction between deep-waterbridges and water during earthquakes and waves[D].Shanghai:Doctorate degree thesis of TongjiUniversity,2004.(in Chinese)
[10]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[J].世界地震工程,2005,21(4):88-94.Yuan Y C,Lai W,Wang J J,et al.The effects ofhydrodynamic damping on seismic response of bridgepiles[J].World Earthquake Engineering,2005,21(4):88-94.(in Chinese)
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