Estimation of the total reliability of offshore structures in Vietnam sea conditions combining the ultimate limit states and fatigue limit states

Since a few last decades in Vietnam, offshore structure engineering has been strongly developed to meet the demand of the oil and gas exploitation. This paper deals with some main research results performed by the authors as follows: (1) Wave loads acting on the jacket elements taking into account of the marine growth in Vietnam sea conditions; (2) Reliability of offshore steel jacket structures basing on the fatigue failure; (3) Reliability of offshore concrete gravity structures basing on the fatigue failure; (4) New concept for estimating the total reliability of offshore structures basing on the combination of the ULS and FLS; (5) Applying this new concept to designing offshore structures installed in Vietnam sea. This study is useful for installing offshore structures with better safety in harsh sea of a tropical country with many storms every year as Vietnam.