Rehabilitation Of A 96-Slot Platform

This work affirms the premise that in certain cases hyperbaric or clamped repair of all known cracks in a jacket structure is not necessary. The work highlights the need for qualified diving inspectors; the use of a new subsea inspection technique; and the potential use of marine growth cleaning devices. Also highlighted is the need for consensus on regional seismic hazard definitions; the use of modulated time histories; and the development of simplified damaged joint characteristics. The work describes the use of elastic simulations to help identify effective repair strategies; and illustrates through inelastic analyses the robustness of a remediated structure to accommodate loads 50% greater than were used in original design. Definitions of 'failure' are discussed. The importance of vigilant inspection is emphasised.