Stresses and deformation of buried pipeline under wave loading

An evaluation of wave-induced pore pressures and effective stresses has bee n recognized by marine geotechnical engineers as an important factor in the design of offshore pipelines. Most previous investigations for the wave-se abed-pipe interaction problem have not considered the material of the pipel ine. Thus, the internal stresses and deformation of the pipeline have not b een investigated in the wave-seabed-pipe interaction problem. This paper co nsiders the pipeline itself as an elastic material and links the analysis o f the pipeline with the wave-seabed interaction problem. Based on the numer ical results presented, the effective stresses in the angular direction sig ma (theta theta) and shear stress tau within the pipe are much larger than the wave-induced pore pressure.