Effects of a floating wave barrier with square cross section on the wave-induced forces exerted to an offshore jacket structure

Arash Dalili Osgouei, Ramin Vafaei Poursorkhabi, c and Hamid Ahmadi

Abstract

The main objective of the present research was investigating the effects of a floating wave barrier with square cross section installed in front of an offshore jacket structure on the wave height, base shear, and overturning moment. A jacket model with the height of 4.55 m was fabricated and tested in the 402 m-long wave flume of NIMALA marine laboratory. The jacket was tested at the water depth of 4m subjected to the random waves with a JONSWAP energy spectrum. Three input wave heights were chosen for the tests: 20 cm, 23 cm, and 28 cm. Results showed that the average decrease in the jacket' s base shear due to the presence of a floating wave barrier with square cross section was 18.97%. The use of wave barriers with square cross section also resulted in 19.78% decrease in the jacket' s overturning moment. Hence, it can be concluded that a floating wave barrier can significantly reduce the base shear and overturning moment in an offshore jacket structure.

Key Words

base shear; floating wave barrier; jacket structure; NIMALA wave flume; overturning moment; random waves

Address

Arash Dalili Osgouei and Arash Dalili Osgouei: Department of Civil Engineering, Maragheh Branch, Islamic Azad University, Maragheh, Iran Ramin Vafaei Poursorkhabi: Department of Civil Engineering, Tabriz Branch, Islamic Azad University, Tabriz, Iran Hamid Ahmadi: Faculty of Civil Engineering, University of Tabriz, Tabriz 5166616471, Iran; Center of Excellence in Hydroinformatics, Faculty of Civil Engineering, University of Tabriz, Tabriz, Iran

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