Design Wave Condition and Structural Analysis for Jacket Structures Installed in Wave Breaking Zone

摘要

Gageocho marine observation tower, placed on a fairly steepunderwater shoal, was severely damaged by two typhoons, Kompas in2010 and Muifa in 2011. After the accidents, a study was undertakenwith respect to the deck clearance and structural response for breakingwave occurrences at the structural position. First, a wave propagationmodel based on nonlinear Boussinesq equations was applied to find theshallow water design wave condition and deck clearance. Next, adynamic structural analysis was done incorporating slamming forceimpact by violent breaking waves. The structure was redesigned basedon the results of the study and was rebuilt at the same place in 2014.