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:: Volume 8, Issue 31 (2017) ::
joc 2017, 8(31): 11-18 Back to browse issues page
Investigating the Performance of Caisson Seawalls against Waves-Induced Force
Maryam Rahbani, Mehdi Esmaeili, Ali Karami khaniki
, akk7239@gmail.com
Abstract:   (5005 Views)
The aim of present study is to estimate the wave-induced force acting on a vertical rigid, a semi-porous and a porous caisson-type seawalls using physical modeling. For this purpose, random sea waves in wide range of wave heights and periods, with variety of water depth were considered for the experimental test. Comparison of the measured values of maximum wave forces (Fmax) for three walls revealed that the wave-induced forces acting on the semi-porous and porous seawalls were more than the impermeable plane seawall. These increaments were calculated as about 28% and 46%, respectively. The semi-porous and porous seawalls showed better performance in wave energy dissipation and in wave reflection decreases in comparison with the rigid impermeable seawall. In addition, it was found that the Fmax increased with the increase of the wave steepness (Hs/Lp) and the decrease of the relative water depth (d/Lp). Based on the lab measurements and multiple regression analysis, new empirical equations have been proposed to predict the maximum wave force acting on each of the above mentioned seawalls.
Keywords: Wave force, Caisson seawall, Physical modelling, Random waves
Full-Text [PDF 98 kb]   (1238 Downloads)    
Type of Study: Research/ Original/ Regular Article |
Received: 2017/09/11 | Accepted: 2017/12/18 | ePublished: 2018/03/7
References
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20. Dhinakaran, G.; Sundar, V.; Sundaravadivelu, R.; Graw, K., 2002. Dynamic pressures and forces exerted on impermeable and seaside perforated semicircular breakwaters due to regular waves. Ocean Engineering, 29(15): 1981-2004.#
21. Goda, Y., 1985. Random seas and design of maritime structures. University of Tokyo Press, Japan, 443P. #
22. Hughes, S.A., 1993. Physical models and laboratory techniques in Coastal Engineering, Advanced Series on Ocean Engineering. World Scientific Publishing, Singapore, 568P.#
23. Ji, C.H.; Oh, S.H.; Oh, Y.M.; Jang, S.C.; Lee, D.S., 2014. Experimental investigation of horizontal wave forces on the perforated caisson with single and double wave chambers. Proceedings of the 34th international conference on coastal engineering, Seoul, South Korea, 321-329PP.#
24. Munireddy, M.G.; Neelamani, S., 2004. Wave pressure reduction on vertical seawalls/caissons due to an offshore breakwater. Indian Journal of Marine Sciences, 33(4): 329-337.#
25. Neelamani, S.; Schüttrumpf, H.; Muttray, M.; Oumeraci, H., 1999. Prediction of wave pressures on smooth impermeable seawalls. Ocean Engineering, 26(8): 739-765.#
26. Neelamani, S.; Sandhya, N., 2004. Wave reflection, run-up, run-down and pressures on plane, dentated and serrated seawalls. Coastal Engineering, 46(2): 141-169.#
27. Ozgur, V.S.; Kabdasli, M.S., 2009. Reduction of non-breaking wave loads on caisson type breakwaters using a modified perforated configuration. Ocean Engineering, 36(17): 1316-1331.#
28. Thaha, M.A.; Dwipuspita, A.I.; Minggu, W., 2013. The perfomance of perforated screen seawall in dissipating waves, minimizing reflected wave and run-up/run-down, 4th International Seminar of HATHI, 6-8 September, Yogyakarta, Indonesia.#



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Rahbani M, Esmaeili M, Karami khaniki A. Investigating the Performance of Caisson Seawalls against Waves-Induced Force. joc 2017; 8 (31) :11-18
URL: http://joc.inio.ac.ir/article-1-1198-en.html


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Volume 8, Issue 31 (2017) Back to browse issues page
نشریه علمی پژوهشی اقیانوس شناسی Journal of Oceanography
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