| Pseudo-Static Elasto-Plastic Cyclic Creep Model and Cyclic Stability of Offshore Soft Foundation |
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| 作者单位： | WANG Jianhua，LIU Zhenwen and QIN Chongren
Professor，Hydraulic Engineering Department of Civil School，Tianjin University，Tianjin 300072，P. R. China
Doctor，Hydraulic Enginering Department of Civil School，Tianjin University，Tianjin 300072，P. R. China |
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| 摘 要： | The accumulative shear deformation of soft clays under cyclic loads is considered as pseudo-staticcreep.A pseudo-static elasto-plastic cyclic creep model is developed based on the visco-elasto-plastic theory.Theparameters in the model are determined by cyclic triaxial soil tests.A method for analyzing the stability of offshoresoft foundation under wave loads is given by combining the model with pseudo-static creep analysis.An exampleis analyzed by the method.The results show that the horizontal and vertical stability of foundations under waveloads can be analyzed by it and the analytical results are qualitatively consistent with the observed failure modes ofshallow foundations.
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Pseudo-Static Elasto-Plastic Cyclic Creep Model and Cyclic Stability of Offshore Soft Foundation |
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| Authors: | WANG Jianhua LIU Zhenwen and QIN Chongren
Professor Hydraulic Engineering |
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| Institution: | WANG Jianhua,LIU Zhenwen and QIN Chongren
Professor,Hydraulic Engineering Department of Civil School,Tianjin University,Tianjin 300072,P. R. China
Doctor,Hydraulic Enginering Department of Civil School,Tianjin University,Tianjin 300072,P. R. China |
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| Abstract: | The accumulative shear deformation of soft clays under cyclic loads is considered as pseudo-static creep. A pseudo-static elasto-plastic cyclic creep model is developed based on the visco-elasto-plastic theory. The parameters in the model are determined by cyclic triaxial soil tests. A method for analyzing the stability of offshore soft foundation under wave loads is given by combining the model with pseudo-static creep analysis. An example is analyzed by the method. The results show that the horizontal and vertical stability of foundations under wave loads can be analyzed by it and the analytical results are qualitatively consistent with the observed failure modes of shallow foundations. |
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| Keywords: | cyclic stability of soft foundation soft foundation cyclic constitutive relation of soft soils offshore engineering soil dynamics |
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