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CE7023 COASTAL & HARBOUR STRUCTURES DESIGN 2

Course Objectives

By the end of this course, the students will:

• comprehend hydrodynamics and morphodynamics around cylindrical structures such as piles and pipelines in marine environment.
• know the principle design considerations of cylindrical structures in coastal and offshore engineering.

Course Content

Flow around and forces on cylindrical structures in steady currents, regular and random waves. Phase-averaged and phase-resolved flow features around cylinders.Diffraction effect and forces on large bodies. Basic principles of scour around marine structures: piplelines, slender and large piles. Time scale of scour and backfilling. Scour protection, field measurements of scour. Scour at edge structures, breakwaters, seawalls. Introduction and physics of liquefaction, biot equations and their solutions. Wave induced residual and momentary liquefaction around marine structures. Floatation of buried pipelines, sinking of pipelines and marine objects.

Course Learning Outcomes

By the end of this course, the students will be able to:

• Describe the flow features around the marine structures in case of steady currents and waves,
• Compute resulting hydrodynamic forces and design cylindrical marine structures against various combinations of the flow conditions of steady current and waves,
• Explain the underlying mechanisms of morphodynamic processes such as scour and backfilling around marines structures linking to the hydrodynamic flow features,
• Assess the engineering problems of scour around marine structures: floatation of buried pipelines, sinking of pipelines and marine objects,
• Function successfully as part of a 2-4 member team to study above given engineering design problems.