Browse > Article
http://dx.doi.org/10.12989/sss.2019.24.4.525

Vibration characteristics of caisson breakwater for various waves, sea levels, and foundations  

Lee, So-Young (Department of Ocean Engineering, Pukyong National Univ.)
Huynh, Thanh-Canh (Center for Construction, Mechanics and Materials, Institute of Research and Development, Duy Tan Univ.)
Dang, Ngoc-Loi (Department of Ocean Engineering, Pukyong National Univ.)
Kim, Jeong-Tae (Department of Ocean Engineering, Pukyong National Univ.)
Publication Information
Smart Structures and Systems / v.24, no.4, 2019 , pp. 525-539 More about this Journal
Abstract
In this study, vibration characteristics of a gravity-based caisson-foundation breakwater system are investigated for ambient and geometric parameters such as various waves, sea levels, and foundation conditions. To achieve the objective, following approaches are implemented. Firstly, operational modal analysis methods are selected to identify vibration modes from output-only dynamic responses. Secondly, a finite element model of an existing caisson-foundation breakwater system is established by using a structural analysis program, ANSYS. Thirdly, forced vibration analyses are performed on the caisson-foundation system for two types of external forces such as controlled impacts and wave-induced dynamic pressures. For the ideal impact, the wave force is converted to a triangular impulse function. For the wave flow, the wave pressure acting on the system is obtained from wave field analysis. Fourthly, vibration modes of the caisson-foundation system are identified from the forced vibration responses by combined use of the operational modal analysis methods. Finally, vibration characteristics of the caisson-foundation system are investigated under various waves, sea levels, and foundations. Relative effects of foundation conditions on vibration characteristics are distinguished from that induced by waves and sea levels.
Keywords
caisson breakwater; wave-induced vibration response; various sea level; various foundation condition;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
연도 인용수 순위
1 Bowles, J.E. (1996), Foundation Analysis and Design, McGraw-Hill, 5th edition, Singapore.
2 Brincker, R., Zhang, L. and Andersen, P. (2001), "Modal identification of output-only systems using frequency domain decomposition", Smart Mater. Struct., 10(3), 441-445.   DOI
3 Brinker, R. and Andersen, P. (2006), "Understanding stochastic subspace identification", Proceedings of the 24th International Modal Analysis Conference, St. Louis, Missouri, January.
4 Catbas, F.N., Ciloglu, S.K., Hasancebi, O., Grimmelsman, K. and Aktan, A.E. (2007), "Limitations in structural identification of large constructed structures", J. Struct. Eng., 133(8), 1051-1066.   DOI
5 Cuomo, G., Lupoi, G., Shimosako, K., and Takahashi, S. (2011), "Dynamic response and sliding distance of composite breakwaters under breaking and non-breaking wave attack", Coast. Eng., 58(10), 953-969. doi: 10.1016/j.coastaleng.2011.03.008.   DOI
6 Gul, M. and Catbas, F.N. (2011), "Damage assessment with ambient vibration data using a novel time series analysis methodology", J. Struct. Eng. - ASCE, 137(12), 1518-1526.   DOI
7 Ewins, D.J. (2000), "Modal Testing: theory, practice and application", 2nd edition, Research Studies Press Ltd., Hertfordshire, UK.
8 Galiatsatou, P., Makris, C. and Prinos, P. (2018), "Optimized reliability based upgrading of rubble mound breakwaters in a changing climate", Marine Sci. Eng., 6(92) doi:10.3390/jmse6030092.
9 Gao, M., Dai, G.Y. and Yang, J.H. (1988), "Dynamic studies on caisson-type breakwaters", Proceedings of the 21st Conference on Coastal Engineering, Torremolinos, Spain, June.
10 Ho, D.D., Stubbs, N., Park, W. and Kim, J.T. (2012), "Prestressforce estimation in PSC girder using modal parameters and system identification", Adv. Struct. Eng., 15(6), 997-1012. https://doi.org/10.1260/1369-4332.15.6.997.   DOI
11 Huynh, T.C., Lee, S.Y., Dang, N.L. and Kim, J.T. (2019), "Vibration-based structural identification of caisson-foundation system via in situ measurement and simplified model", Struct. Control Health Monit., e2315. doi:10.1002/stc.2315.   DOI
12 KHOA (Korea Hydrographic and Oceanographic Agency) (2019), http://www.khoa.go.kr/koofs/eng/observation/obs_real_detail.do.
13 Li, H.N., Yi, T.H., Ren, L., Li, D.S. and Huo, L.S. (2014), "Reviews on innovations and applications in structural health monitoring for infrastructures", Struct. Monit. Maint., 1(1), 1-45. http://dx.doi.org/10.12989/smm.2014.1.1.001   DOI
14 Kim, J.T. and Stubbs, N. (1995), "Model uncertainty impact and damage-detection accuracy in plate girder", J. Struct. Eng. -ASCE, 121(10), 1409-1417. https://doi.org/10.1061/(ASCE)0733-9445(1995)121:10(1409).   DOI
15 Lamberti, A. and Martinelli, L. (1998), "Prototype measurements of the dynamic response of caisson breakwaters", Proceedings of the 26th International Conference on Coastal Engineering, ASCE, Copenhagen, Denmark, June.
16 Lee, S.Y., Huynh, T.C. and Kim, J.T. (2015), "Structural identification of gravity-type caisson structure via vibration feature analysis", Smart Struct. Syst., 15 (2), 259-281. http://dx.doi.org/10.12989/sss.2015.15.2.259.   DOI
17 Lee, S.Y., Huynh, T.C. and Kim, J.T. (2018), "A practical scheme of vibration monitoring and modal analysis for caisson breakwater", Coast. Eng., 137, 103-119. https://doi.org/10.1016/j.coastaleng.2018.03.008.   DOI
18 Lee, S.Y., Huynh, T.C., Kim, J.T., Yoon, H.S. and Han, S.H. (2013), "Vibration characteristics of gravity-type caisson breakwater structure with water-level variation", Int. J. Distrib. Sens. N., 261396. doi:10.1155/2013/261396.
19 Overschee, V.P. and De Moor, B. (1996), "Subspace identification for linear system", Kluwer Academic Publisher, Dordrecht, Netherlands.
20 Schmidt, R., Oumeraci, H. and Partenscky, H.W. (1992), "Impact loads induced by plunging breakers on vertical structures", Proceedings of the 23rd International Conference on Coastal Engineering, Venice, Italy, October.
21 Shimoi, N., Saijo, M., Cuadra, C. and Madokoro, H. (2015), "Comparison of natural frequency vibration analysis for a bridge using accelerometers and a piezoelectric cable vibration sensor", Int. J. Instrum. Sci., 4(1). doi:10.5923/j. instrument.20150401.01.
22 Yi, J.H., Park, W.S., Lee, S.Y., Huynh, T.C., Kim, J.T. and Seo, C.K. (2013), "Evaluation of vibration characteristics of an existing harbor caisson structure using tugboat impact tests and modal analysis", Int. J. Distrib. Sens. N., 806482. doi:10.1155/2013/806482.   DOI
23 Tagagi, H. (2015), "Method for quick assessment of caisson breakwater failure due to tsunamis: retrospective analysis of data from the 2011, Great East Japan Earthquake and Tsunami", Coast. Eng., 57(3). doi:10.1142/S057856341 5500126.
24 Vink, H.A.T. (1997), "Wave impacts on vertical breakwaters", Master's thesis, Faculty of Civil Engineering, Delft University of Technology, Netherlands.
25 Westergaard, H.M. (1933), "Water pressure on dams during earthquakes", T. Am. Soc. Civil Engineers, 98(2), 418-433   DOI
26 Yi, J.H. and Yun, C.B. (2004), "Comparative study on modal identification methods using output-only information", Struct. Eng. Mech., 17(3-4), 445-446. https://doi.org/10.12989/sem.2004.17.3_4.445.   DOI