ABSTRACT
The structural form of ocean structures is unique and expensive by design, installation, commissioning, and operability. Legislation calls for periodic certification of offshore structures. Alternatively, one could rely on the structures to be so well designed and built so that no serious failure develops during his or her working life. Unfortunately, weather conditions and marine growth become more severe than initially predicted values. Wave and current loads have been underestimated in few design cases. Fatigue and corrosion are still debatable subjects. All the above factors result in heavy penalty on the existing weight. Otherwise, this could save a large sum of material costs and ease out the installation procedures. Feedback of actual conditions of structures during their working life would be helpful to do the design successfully. Moreover, marine environment is corrosive in nature, which can cause serious degradation of material and strength of the structural members. Material for construction should be carefully chosen so that the service life of ocean structures is guaranteed. Repair of ocean structures is a multicomplex phenomenon not because of its limited accessibility for repair but also due to its undesirable intervention of the structure for repair and rehabilitation. In this chapter, different types of structural materials that are useful for construction, repair, and rehabilitation are discussed. Recent advancements with respect to repair of concrete structures are also presented.
