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Perturbation analysis on post-buckling behavior of pile
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作者 赵明华 贺炜 王泓华 《Journal of Central South University of Technology》 EI 2007年第6期853-857,共5页
The nonlinear large deflection differential equation, based on the assumption that the subsoil coefficient is the 2nd root of the depth, was established by energy method. The perturbation parameter was introduced to t... The nonlinear large deflection differential equation, based on the assumption that the subsoil coefficient is the 2nd root of the depth, was established by energy method. The perturbation parameter was introduced to transform the equation to a series of linear differential equations to be solved, and the deflection function according with the boundary condition was considered. Then, the nonlinear higher-order asymptotic solution of post-buckling behavior of a pile was obtained by parameter-substituting. The influencing factors such as bury-depth ratio and stiffness ratio of soil to pile, slenderness ratio on the post-buckling behavior of a pile were analyzed. The results show that the pile is more unstable when the bury-depth ratio and stiffness ratio of soil to pile increase, and although the buckling load increases with the stiffness of soil, the pile may ruin for its brittleness. Thus, in the region where buckling behavior of pile must be taken into account, the high grade concrete is supposed to be applied, and the dynamic buckling behavior of pile needs to be further studied. 展开更多
关键词 pile foundation stable loading path perturbation approach bury-depth ratio stiffness ratio of pile to soil
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Dynamic Analysis of a Single-Column Platform
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作者 Lian Gan , Ni Kan, Hu Kai and Guo Dawei Prof., Senior Engineer, Marine Design and Research Institute of China, Shanghai Senior Engineer, Marine Design and Research Institute of China, Shanghai Engineer, Marine Design and Research Institute of China, Shanghai 《China Ocean Engineering》 SCIE EI 1991年第4期385-394,共10页
In this paper, a single-column structure used as well-head platform is studied. The loads of wave and current exerted on the single-column will be greatly reduced, therefore the cost of the structure will be decreased... In this paper, a single-column structure used as well-head platform is studied. The loads of wave and current exerted on the single-column will be greatly reduced, therefore the cost of the structure will be decreased. The advantages of the single-column structure compared with ordinary jacket structure are explained. A dynamic analysis of this type of structure is made and some problems related to dynamic analysis are solved. In order to check the reliability of computation theory and programme, model tests have been carried out. However, as space is limited, the conclusion of tests will be introduced in another paper. Therefore, this type of structure is applicable for proctical engineering. 展开更多
关键词 single-column structure dynamic analysis diffraction wave theory natural period resonant dynamic strength damping ratio fictitious stiffness of pile top fatigue analysis
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