DYNAMIC RESPONSE OF PARTIALLY EMBEDDED CYLINDRICAL STRUCTURE UNDER SEISMIC FORCE, CONSIDERING FOUNDATION COMPLIANCE

摘要

This paper attempts to develop a semi-analytical model for estimating the seismic response of a partially embedded cylinder in an elastic half-space, considering foundation compliance. This type of problem still remains a topic of significant research for nuclear power plants especially related to response of reactor building. Most of the research carried out on this topic has either been carried out by resorting to finite element method(FEM) which makes the computational cost very expensive or based on the simplifying assumption of assuming the cylindrical structure to be sufficiently rigid such that its stiffness can be ignored, where only foundation stiffness controls the response. In the present paper a mathematical model has been developed where the deformation of the cylindrical body (including its shear deformation characteristics) has been taken into cognizance and coupling with foundation a comprehensive solution has been sought based on Galerkin's weighted residual technique. The results are finally compared with FEM to check the sanctity of the same. The results are found to be in good agreement with detailed finite element analysis.