简介:Marinestructuresoperatinginnaturaloceanenvironmentaresubjectedtovariousstochasticloads.Fordesignofthemarinestructures,themostimportanttaskistodetermineenvironmentalloadde-signcriterion.Thispaperpresentsamethodtodeterminetheoptimumenvironmentalloaddesigncriteri-onformarinestructures.Thismethodisbasedontheinvestmentandbenefitanalysisanditcanreachthedesignpurposeofdecreasingtotalcostsduringtheservicelifeofthestructuresandincreasingeconomicbenefits.