Research On 3D Elastic-Plastic Finite Elements Analysis Method Of Piled Wharf-Slope System And Its Application

It is showed by survey data that more serious deformation of the wharf structure occurred on the joint zone of the shore and croy. In order to solve these problems, the paper research on the piled wharf and slope interaction in the zone. There is no similar research on the problem. So this job in the paper brings us new research project.The deformation of the piled wharf structure in the joint zone of the shore and croy showed space characteristics. Now 2D analysis methods are applied the research on the piled. In order to analysis on the deformation characteristics of piled wharf and slope in the corner of No. croy of Tianjin port, the paper set up a 3D elastic-plastic finite elements model. The model simulated the true port structure, which improved the pertinence and reliability.The soil parameters had obvious effect on the numerical calculation. In order to provide reliable parameters to the numerical calculation, geologic reconnaissance and some soil experiments were carried out. The experiments included simple shear test, compress test, rebound test and triaxil undrained shear test, etc. Through the contrast of the compress exponent, expand exponent, sphere stress and generalized shear stress, analysis were done on soil's stress, yielding characteristics, which established the base of application of new constitutive relationship.Observation work on the slope soil was carried through for the first time in No. 2 croy of the Tianjin port. The settlement of the piled wharf structure and heap were observed. Data were not only the complementarities to the numerical calculation, but also provided the forecasting reference to the movement trend. The job had actual significance to port management.In the progress of strength reduction FEM analysis on the slope stability, the using shear strain as the necessary condition of the judgments for slope stability had some disadvantage. The plastic zone criterion is more objective, but the display of plastic zone had some difficulty. The paper provided the stress ratio as the yielding parameter, which solved the display difficulty of plastic zone.Slope stability is a concerned problem in the academe and engineering. The existing method cannot solve piled wharf slope stability. The paper developed the strength reduction FEM, and provided a new method which cans calculation the stability of the piled wharf slope. The node imbalance force creition and plastic zone criterion were used as the judge standard for the stability calculation. The paper used the method to calculate the stability of the piled wharf slope, which solved the difficulty of the stability calculation for the piled wharf slope.