循环弹塑性本构模型在港口沉箱码头抗震理论中的应用
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摘要
在港口抗震中采用循环弹塑性本构模型对港工建筑物的地震破坏机理进行数值分析与振动台实验。选取在港口建设中最常见的沉箱码头作为研究对象,采用循环弹塑性本构模型,FD-FE耦合方法模拟地震荷载作用下地基土液化导致的沉箱码头岸壁的整体失稳。然后通过水下大型振动台的模型实验进行验证。数值分析与模型试验破坏趋势基本吻合。结论表明:循环弹塑性本构模型在港口工程抗震理论研究中有一定的参考应用价值,为循环弹塑性本构模型在港口建设实际工程中的推广起到一定的铺垫作用。
The cyclic elasto-plastic model was used to analyze damage principle of port building through numerical analysis and shaking table experiments.Select caisson quay wall on the construction of ports as the object of study,use cyclic elasto-plastic model,FE-FD coupled numerical analysis method to simulate seismic response of large-size caisson quay wall under earthquake.Then adopt the under-water shaking table model experiments for verification.Comparing the results of different methods,destruction trend is similar.It is conclusion that cyclic elasto-plastic model is valuable in seismic theory and in the actual projects of ports plays a bedding role for promotion.
The cyclic elasto-plastic model was used to analyze damage principle of port building through numerical analysis and shaking table experiments.Select caisson quay wall on the construction of ports as the object of study,use cyclic elasto-plastic model,FE-FD coupled numerical analysis method to simulate seismic response of large-size caisson quay wall under earthquake.Then adopt the under-water shaking table model experiments for verification.Comparing the results of different methods,destruction trend is similar.It is conclusion that cyclic elasto-plastic model is valuable in seismic theory and in the actual projects of ports plays a bedding role for promotion.
引文
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[2]Zeng X,STeedman R S.On the Behaviour of Quay Walls in Earth-quakes[J].Geotechnique,1993,43(3):417-431.
[3]Dakoulas P,Gazetas G.Effective-stress Analysis of Gravity QuayWalls[C]//Proceedings of the 11th Int.Conf.On Soil Dynamics andEarthquake Engineering and the 3th Int.Conf.On EarthquakeGeotechnical Engineering,2004:326-333.
[4]Oka F,Yashima A,Tateishi A,et al.A Cyclic Elasto-plastic Con-stitutive Model for Sand Considering a Plastic Strain Dependencyof the Shear Modulus[J].Geotechnique,1999,49(5):661-680.
[5]Oka F,Yashima A,Shibata T,et al.FEM-FDM Coupled Lique-faction Analysis of a Porous Soil Using an Elastic-plastic Model[J].Applied Scientific Research,1994,52:209-245.
[6]鲁晓兵,谈庆明,王淑云,等.饱和砂土液化研究新进展[J].力学进展,2004,34(2):87-96.
[7]Seed H B,Lee K L.Liquefaction of Saturated Sands during CyclicLoading[J].Journal of the Soil Mechanics and Foundation Division,ASCE,1996,92(6):105-134.
[8]徐志英,沈珠江.土坝地震孔隙水压力的产生、扩散和消散的有限元动力分析[J].华东水利学报,1981,9(4):1-16.
[9]卢延浩,鲍伏波.接触面薄层单元耦合本构模型[J].水利学报,2000(2):71-75.
[10]关峰,高大钊.接触面弹粘塑性本构关系研究[J].土木工程学报,2001,34(1):88-91.
[11]Kiyoshi,Fukutake,Akira,et al.Analysis of Saturated Dense Sand-structure System and Composition with Results from Shaking TableTest[J].Earthquake Engineering and Structural Dynamics,1990,19:977-992.
[12]刘汉龙,陆兆臻,钱家欢.土石坝非线性随机反应及动力可靠性分析[J].河海大学学报,1996,24(3):105-109.
[13]Seed H B,Booker R.Stabilization of Potentially Liquefial SandDeposits Using Gravel Drains[J].J.of Geotechnical EngineeringDiv.JGED,1976,102(7):1-15.
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