SEISMIC RESPONSE ANALYSIS OF OFFSHORE STRUCTURE SUPPORTED BY GROUP PILE FOUNDATION BY CONSIDERING WAVE AND CURRENT ACTION

Abstract

This the structural design and analysis requirement of the offshore structure supported by the group pile
foundation and subjected by the seismic, wave and current which induced the forces and moment in the fixed type
offshore structure. The seismic response analysis of the fixed type offshore structure supported by the group pile
foundation and subjected by wave and current load, the offshore platform is discretized using the Structure Analysis
Computer Software (SAP2000) which is based on the finite element method, the wave force on the pile can be
calculated by using the linear Morision equation. The hydrodynamic loading on horizontal and vertical tubular
members and also the dynamic response of the fixed type offshore structure together with the distribution of the
displacement ,axial force and bending moment at the pile of the offshore structure at the regular and extreme
condition due to load. The height of the wave is increase or decrease which depends upon the velocity of the wind. The
result of the study show that the effect of the offshore structure when it is only subjected with the seismic force and
effect of the offshore platform by the seismic force along with the wave and current force and also study the condition
of the liquefaction where the offshore structure is placed.