ABSTRACT
Jack-up units are self-elevating mobile platforms that are extensively used in the offshore oil and gas industry. On removal of the jack-up unit, the legs are retracted from the seabed leaving depressions at the site. During jack-up reinstallation near these footprints, eccentric and/or inclined loading conditions may occur, inducing large displacements and/or forces in the jack-up legs. If the total forces exceeded the structural capacity, there may be damage in the jack-up leg and at worst could lead to collapse of the rig.
