For the reliable design of an offshore platform, it is very important to reduce the effects of wave forces as well as to increase the safety of structure. In order to reduce the wave forces on structures, the partial porous cylinder, which is composed of a porous part located near free surface and a rigid part bounded top and bottom by impermeable end caps, is newly suggested. Using the Eigen-function expansion method the wave force on partial porous cylinders are calculated. Applying the wave forces and seismic forces, the dynamic response evaluations of the platform are carried out through the modal analysis and the substructure method based on the effect of soil-structure interaction. The displacement and bending stress are computed using the various input parameters, such as the shear-wave velocity of soil and the porosity rate.

• 박민수(한국건설기술연구원 인프라구조연구실 수석연구원, 공학박사) | Park, Min Su Corresponding Author
• 정연주(한국건설기술연구원 인프라구조연구실 연구위원, 공학박사) | Jeong, Youn Ju
• 유영준(한국건설기술연구원 인프라구조연구실 수석연구원, 공학석사) | You, Young Jun