| dc.description.abstract | The recent advances in offshore technology has led to deeper exploratory excursions, easier structure installation and monitoring as well as remotely-monitored maintenance work , which has been a primer for increase in offshore structures worldwide. Ensuring the structural integrity is the foreground for any design or maintenance operation. Monopile support structures are one of the mostly used and important structural component for the general stability and longevity of OWT installed at lower level of water depth. A finite element analysis method is used to model and analyse the limit states of a monopile in a sand-clay multi-layer soil model with environmental loads along ranging magnitude of earthquake. The stress generated, pile deflection and pile rotation on the monopile is studied and compared to the ultimate limit state of the monopile, over which it would go into failure. The results show that the monopile movement w.r.to horizontal deflection and rotation exceed the recommended limit states at higher magnitudes of earthquake. This showcases, the need of seismic analysis and regulatory assessment of monopile foundation in seismically active areas. | |
