Volume 19, Issue 4 (2019)                   Modares Mechanical Engineering 2019, 19(4): 825-831 | Back to browse issues page

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Yousefi O, Azhdary Moghaddam M, Keikhaie N. Strengthening Defected Dam Gates under Cavitation Vibration Using CFRP. Modares Mechanical Engineering. 2019; 19 (4) :825-831
URL: http://journals.modares.ac.ir/article-15-25449-en.html
1- Civil Engineering Department, Engineering Faculty, University of Sistan and Baluchestan, Zahedan, Iran
2- Civil Engineering Department, Engineering Faculty, University of Sistan and Baluchestan, Zahedan, Iran , mazhdary@eng.usb.ac.ir
3- Mechanical Engineering Department, Engineering Faculty, University of Sistan and Baluchestan, Zahedan, Iran
Abstract:   (1334 Views)
Many steel structures are damaged due to environmental factors such as accidental loads, exhaustion, rust, and phenomena such as cavitation and time passes. Dams’ bottom outlets are one of the important components of these structures that are subject to numerous hydraulic problems such as cavitation vibration, which causes damage and needs repair. One of the novelties for refining is the use of Carbon Fiber Reinforced Polymer (CFRP). In this paper, the effect of CFRP on gate strengthening under cavitation vibration load and the effect of damage on maximum vibration by using ABAQUS were studied. In order to observe the effects of failure on the maximum vibration of the outlet, two damages were applied to the front or back of the gate. Finally, the damaged gates were reinforced with two layers of CFRP. The outcomes showed that damage resulted in maximum vibration increase and polymer fibers has a significant effect on reducing vibrations and stresses caused by cavitation pressure.
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Received: 2018/09/24 | Accepted: 2018/11/16 | Published: 2019/04/6

1. Vischer DL, Hager WH. Dam hydraulics. Ghodsian S, translator. Tehran: Tarbiat Modares University Publications; 2003. [Persian] [Link]
2. Soleymanzade R, Shamsaei A. Numerical analysis of the two-phase flow of water around the outlet. 7th International Civil Engineering Congress, 8 May, 2006, Tehran, Iran. Tehran: Tarbiat Modares University; 2006. [Persian] [Link]
3. Lewin J. Hydraulic gates and valves: In free surface flow and submerged outlets. 7th Edition. London: Thomas Telford Publications; 1995. [Link]
4. Saadatjo J, Jabari A. Numerical analysis of the cavitation phenomenon in the outlet. 3rd National Congress on Civil Engineering, 1 May, 2007, Tabriz, Iran. Tabriz: Tabriz University; 2007. [Persian] [Link]
5. Mivechi MR, Kanani A. Vibration analysis of submerged valves using software model. 3th National Congress of Civil Engineering, 2007, 1 May, 2007, Tabriz, Iran. Tabriz: Tabriz University; 2007. [Persian] [Link]
6. Bonacci JF, Maalej M. Behavioral trends of RC beams strengthened with externally bonded FRP. Journal of Composites for Construction. 2001;5(2):102-113. [Link] [DOI:10.1061/(ASCE)1090-0268(2001)5:2(102)]
7. Thomsen H, Spacone E, Limkatanyu S, Camata G. Failure mode analyses of reinforced concrete beams strengthened in flexure with externally bonded fiber-reinforced polymers. Journal of Composites for Construction. 2004;8(2):123-131. [Link] [DOI:10.1061/(ASCE)1090-0268(2004)8:2(123)]
8. Sen R, Liby L, Mullins G. Strengthening steel bridge sections using CFRP laminates. Composites Part B Engineering. 2001;32(4):309-322. [Link] [DOI:10.1016/S1359-8368(01)00006-3]
9. Motavalli M, Czaderski C. FRP composites for retrofitting of existing civil structures in Europe: State-of-the-art review. International Conference of Composites & Polycon, 17-19 October, 2007, Tampa, Florida, U.S.A. Mason: American Composites Manufacturers Association; 2007. [Link]
10. El Maaddawy T, Soudki K. Strengthening of reinforced concrete slabs with mechanically-anchored unbonded FRP system. Construction and Building Materials. 2008;22(4):444-455. [Link] [DOI:10.1016/j.conbuildmat.2007.07.022]
11. Sweedan AMI, El-Sawy KM, Alhadid MMA. Interfacial behavior of mechanically anchored FRP laminates for strengthening steel beams. Journal of Constructional Steel Research. 2013;80:332-345. [Link] [DOI:10.1016/j.jcsr.2012.09.022]
12. Patnaik AK, Bauer CL. Strengthening of steel beam with carbon FRP laminates. 4th International Conference on Advanced Composite Materials in Bridges and Structures, 20-23 July, 2004, Calgary, Canada. Calgary: Calgary University; 2004. [Link]
13. Linghoff D, Al-Emrani M, Kliger R. Performance of steel beams strengthened with CFRP laminate-Part 1: Laboratory tests. Composites Part B Engineering. 2010;41(7):509-515. [Link] [DOI:10.1016/j.compositesb.2009.05.008]
14. Edberg W, Mertz D, Gillespie Jr J. Rehabilitation of steel beams using composite materials. 4th Materials Engineering Conference, 10-14 November, 1996, Washington DC, United States. Reston: American Society of Civil Engineers; 1996. [Link]
15. Tavakkolizadeh M, Saadatmanesh H. Strengthening of steel-concrete composite girders using carbon fiber reinforced polymers sheets. Journal of Structural Engineering. 2003;129(1):30-40. [Link] [DOI:10.1061/(ASCE)0733-9445(2003)129:1(30)]
16. Hosseini A, Sanei M, Parekar M, Habibi M, Davoodi MH, Ghafoori A. Model of Narmashir dam outlet [Internet]. Tehran: Education and Promotion Institute of Soil Conservation and Watershed Management; 2008 [cited 2018 Sep 01]. Available from: http://fipak.areeo.ac.ir/site/catalogue/18781007# [Link]

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