Offshore Structure Stability

It is not uncommon to observe coastal structures such as piers and breakwaters developing structural cracks, excessive settlement, or noticeable tilting over time. These failures are generally associated with inadequate structural stability of coastal infrastructure—including residential developments, hotels, tourism facilities, piers, ports, and other shoreline structures—as well as offshore facilities such as oil and gas platforms.

The primary factors affecting the stability of offshore structures are sediment transport and wave-induced hydrodynamic forces acting on both the seabed and throughout the water column. Ocean currents and waves continuously reshape the marine environment by altering seabed morphology and redistributing sediments. The construction of marine structures further modifies local circulation patterns and wave characteristics, which can significantly influence sediment movement and hydrodynamic conditions.

These changes may result in sediment deposition around a structure, particularly when it is located near a river mouth that supplies large amounts of sediment. Conversely, increased currents and wave action may cause seabed scour and sediment erosion around structural foundations. Excessive scour is one of the leading causes of reduced structural stability and long-term foundation failure in both coastal and offshore environments.

To minimize these risks, it is essential to evaluate hydrodynamic conditions, sediment transport processes, particle movement, and wave characteristics before and after construction. Numerical modeling provides a reliable and scientifically based approach for identifying the causes of structural instability and evaluating engineering alternatives.