Enter your email address
Submit
Write your message
Volume 14, Issue 28 (1-2019)
Marine Engineering 2019, 14(28): 77-90 |
Back to browse issues page
Download citation:
BibTeX | RIS | EndNote | Medlars | ProCite | Reference Manager | RefWorks
Send citation to:
BibTeX | RIS | EndNote | Medlars | ProCite | Reference Manager | RefWorks
Send citation to:
karami matin A A, shafieefar M, akbari H. Experimental Study Effects of Irregular Wave Parameters on Berm Recession of deformed profile Berm Breakwaters. Marine Engineering 2019; 14 (28) :77-90
URL: http://marine-eng.ir/article-1-643-en.html
URL: http://marine-eng.ir/article-1-643-en.html
1- Tarbiat Modares University
Abstract: (4090 Views)
Berm breakwater is a type of reshaping rubble mound breakwaters that its seaside profile can be reshaped under severe wave attack. The final berm recession is an important criterion to check the berm width as well as the stability of these breakwaters. Berm recession due to a design wave is usually determined by means of empirical equations derived from experiments. Initial sections with no recession have been assumed in most of these experiments. However, in a real condition, a berm breakwater may experience many of waves before experiencing a design wave condition. The wave history and possible recessions before a stormy condition may affect the final reshaped profile. This subject is therefore investigated in the present study by means of performing 2D tests in the hydraulics laboratory at Tarbiat Modares University. In addition, the effects of wave parameters on the hydrodynamic response of berm breakwaters are evaluated performing 30 tests in the wave flume. In all experiments, irregular waves have been generated based on JONSWAP spectrum wave with γ factor of 3.3 and the median stone diameter and gradation are selected as 2 cm & 1.6 respectively. Based on the measurements, the berm recession (in both statically and dynamically stable berm breakwaters) increases by increasing the wave height and wave period. In addition, once the design wave height rises and exceeds a threshold level, the impact of previous waves on the final reshaped profile will be decreased.
Keywords: Reshaping Berm Breakwater, Deformed profile, Irregular Waves, Experimental Modeling, Berm Recession
Type of Study: Research Paper |
Subject:
Marine Structures and near shore
Received: 2017/11/6 | Accepted: 2019/02/17
Received: 2017/11/6 | Accepted: 2019/02/17
References
1. Lykke Andersen T. Hydraulic Response of Rubble Mound Breakwaters: scale effects-berm breakwaters. Aalborg University report 27, ISSN 0909-4296, Dissertation. 2006.
2. Van Der Meer JW. Rock slopes and gravel beaches under wave attack: Delft hydraulics; 1988.
3. Moghim MN, 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. 2011 Aug 31;58(8):706-21. [DOI:10.1016/j.coastaleng.2011.03.006]
4. PIANC MarCom WG 40, 2003. State-of-the-Art of Designing and Constructing BermBreakwaters. PIANC, Brussels.
5. Hall K, Kao JS. A study of the stability of dynamically stable breakwaters. Canadian Journal of Civil Engineering. 1991;18(6):916-25. [DOI:10.1139/l91-113]
6. Van der Meer JW. Stability of the seaward slope of berm breakwaters. Coastal Engineering. 1992;16(2):205-34. [DOI:10.1016/0378-3839(92)90037-U]
7. Lissev N, Daskalov K, editors. Berm type breakwater—an alternative solution for new east breakwater for Port of Burgas. Varna conference; 2000.
8. Sigurdarson S, Van Der Meer JW, Burcharth HF, Sørensen JD, editors. Optimum safety levels and design rules for the Icelandic-type berm breakwater. The International Conference of Coastal Structures; 2007.
9. Shekari MR, Shafieefar M. An experimental study on the reshaping of berm breakwaters under irregular wave attacks. Applied Ocean Research. 2013 Aug 31;42:16-23. [DOI:10.1016/j.apor.2013.03.007]
10. Sigurdarson S, Van der Meer JW. Design of berm breakwaters, recession, overtopping and reflection. Proceedings of Coasts, Marine Structures and Breakwaters. 2013:18-20.
11. Moghim MN, Alizadeh F. Hydraulic stability of reshaping berm breakwaters using the wave momentum flux parameter. Coastal Engineering. 2014 Jan 31;83:56-64. [DOI:10.1016/j.coastaleng.2013.10.008]
12. Andersen TL, Burcharth HF. A new formula for front slope recession of berm breakwaters. Coastal Engineering. 2010;57(4):359-74. [DOI:10.1016/j.coastaleng.2009.10.017]
13. Motalebi A. Experimental study of investigating the influence of armor stone size in stability of berm breakwaters (Doctoral dissertation, Master thesis, Tarbiat modares University).
14. Andersen TL, Moghim MN, Burcharth HF. Revised recession of reshaping berm breakwaters. Coastal Engineering Proceedings. 2014 Oct 28;1(34):53 [DOI:10.9753/icce.v34.structures.53]
15. Moghim MN, Andersen TL. Armor stability of hardly (or partly) reshaping berm breakwaters. Coastal Engineering. 2015 Oct 31;104:1-2.s
16. Jensen OJ, Klinting P. Evaluation of scale effects in hydraulic models by analysis of laminar and turbulent flows. Coastal engineering. 1983;7(4):319-29. [DOI:10.1016/0378-3839(83)90002-9]
Send email to the article author
| Rights and permissions | |
 |
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License. |
International Journal of Maritime Technology is licensed under a
Creative Commons Attribution-NonCommercial 4.0 International License.