Numerical Modeling of Pressure on Composite Berm Breakwater and its Comparison with Horizontally Caisson Breakwater Considering the Effect of Porous Medium

Document Type : Original Research

Authors
M. marashian 1
M. adjami 1
A. Rezaee mazyak 2
1 Water and Environmental Engineering Department, Faculty of Civil Engineering, Shahrood University of Technology
2 Faculty of Civil and Environmental Engineering, TMU
Abstract
The pressure distribution resulting from the wave interaction in the horizontally caisson breakwater is one of the important parameters in the design of this breakwater. Due to the significant impact of this parameter, the use of composite berm breakwater has been investigated to improve the performance and reduce the forces applied to the structure .In this study, numerical modeling of pressure on composite berm breakwater and its comparison with horizontally caisson breakwater has been investigated by numerical model of FLOW-3D. In composite berm breakwater, compared with the horizontally caisson breakwater at P1 (the maximum pressure applied to the caisson at the surface of the water), the amount of achieved pressure showed the reduction of 52.09% and at P2 (maximum pressure in the caisson crest), the achieved pressure showed 63/07 % decrease. Also in P3 (maximum pressure in caisson toe), the pressure was reduced by 76.09%, and in Pu (uplift pressure under caisson), this value indicates a decrease of 53.92%.

Keywords

Subjects

[1] Vanneste, D. F., & Troch, P. “Experimental research on pore pressure attenuation in rubble-mound breakwaters”. Coastal Engineering Proceedings, 1(32), 30, 2011.
[2] De Groot, M. B., Yamazaki, H., Van Gent, M. R. A., & Kheyruri, Z. “Pore pressures in rubble mound breakwaters”. In Coastal Engineering 1994 (pp. 1727-1738), 1995.‏
[3] Van Gent, M. R. “Wave interaction with berm breakwaters”. Journal of waterway, port, coastal, and ocean engineering, 121(5), 229-238, 1995.
[4] Losada, I. J., Lara, J. L., Guanche, R., & Gonzalez-Ondina, J. M. “Numerical analysis of wave overtopping of rubble mound breakwaters”. Coastal engineering, 55(1), 47-62, 2008.
[5] Higuera, P., Lara, J. L., & Losada, I. J. “Three-dimensional interaction of waves and porous coastal structures using OpenFOAM®. Part I: Formulation and validation”. Coastal Engineering, 83, 243-258, 2014.
[6] Moghim M N. “Estimation of Pressure Variation on Rubble-Mound Breakwaters Using Wave Momentum Flux Parameter”. joc.; 6 (23) :27-37,2015.
[7] Amirabadi R, Rezaee mazyak A, Ghasemi A. “Numerical Modeling Investigation of Irregular Wave Interaction with Perforated Caisson Breakwater”, Journal Of Marine Engineering, 14 (27) :69-79,2018.
[8] Larroque, B., Arnould, P., Luthon, F., Poncet, P. A., Rahali, A., & Abadie, S. “In-situ Measurements of Wave Impact Pressure on a Composite Breakwater: Preliminary Results”, 2018.
[9] Hirt, C. W., & Nicholas, B. Flow-3D User’s Manual. Flow Science Inc, 1998.
[10] Ghasemi, A. Shafee Far, M and Panahi, R. (2016). Numerical Simulation of Wave Overtopping From Armour Breakwater by Considering Porous Effect, Jurnal of Marin Engineering, vol. 11, no. 22. (In Persian)
[11] F. Science, FLOW-3D Documentation, 2012.
[12] Samani, H. M., Samani, J. M., & Shaiannejad, M. (2003). Reservoir routing using steady and unsteady flow through rockfill dams. Journal of Hydraulic Engineering, 129(6), 448-454.‏
[13] PIANC, W. “State-of-the-Art of Designing and Constructing Berm Breakwaters”. Report of working group, 40,2003.
[14] Sigurdarson, S., Van Der Meer, J. W., Burcharth, H. F., & Sørensen, J. D. “Optimum safety levels and design rules for the Icelandic-type berm breakwater”. In Coastal Structures 2007: (In 2 Volumes) (pp. 53-64),2009.
[15] Hall, K. and Kao, S. “A Study of the Stability of Dynamically Stable Breakwaters”, Canadian Journal of Civil Engineering, Vol. 18, pp.916-925,1991.
[16] Moghim, M. N., Shafieefar, M., Tørum, A., & Chegini, V. “A new formula for the sea state and structural parameters influencing the stability of homogeneous reshaping berm breakwaters”. Coastal Engineering, 58(8), 706-721,2011.‏
[17] Torum, A., Krogh, S. R., Bjordal, S., Fjeld, S., Archetti, R., & Jacobsen, A. “ Design criteria and design procedures for berm breakwaters”. In Proc., Coastal Structures’ 99 (pp. 331-341). Rotterdam, The Netherlands: Balkema,1999.
[18] US Army, Coastal Engineering Manual, 2003.
[19] Tanimoto, K., Moto, K., Ishizuka, S., & Goda, Y. “An investigation on design wave force formulae of composite-type breakwaters”. In Proceedings of the 23rd Japanese Conference on Coastal Engineering (pp. 11-16),1976.
[20] Goda, Y. “ New wave pressure formulae for composite breakwaters”. In Coastal Engineering 1974 (pp. 1702-1720), 1975.
Modares Civil Engineering journal
Volume 20, Issue 3
September and October 2020
Pages 79-92