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Rectangular and Cylindrical TLDs with Rotatable Baffles to Improve Seismic Behavior of Structures, a Numerical Study | ||
| Civil Engineering Infrastructures Journal | ||
| مقاله 6، دوره 51، شماره 2، اسفند 2018، صفحه 339-354 اصل مقاله (1.23 M) | ||
| نوع مقاله: Research Papers | ||
| شناسه دیجیتال (DOI): 10.7508/ceij.2018.02.006 | ||
| نویسندگان | ||
| Seyed Mehdi Zahrai* 1؛ sirous kakouei2 | ||
| 1Center of excellence for Engineering and Management of civil Infrastructures School of Civil Engineering, Faculty of Engineering.The Univ. of Tehran | ||
| 2University of Tehran | ||
| چکیده | ||
| One of structural passive control methods is to use Tuned Liquid Damper (TLD). However, because of the nature of the TLD, only one tuning frequency can be created when the water is sloshing. To fix this problem, some installed rotatable baffles can be embedded inside TLD called Variably Baffled TLD (VBTLD) where by changing the angle of the baffles a tuning frequency range is created. This gives the passive control system the capability to be pre-tuned according to the desired frequency. In this paper, the effects of rectangular and cylindrical shapes of container on behavior of VBTLD are studied and numerically validated with experimental results. There are four baffles inside each damper tuned manually in different cases. In numerical investigation, the rectangular TLD created greater returning force than cylindrical TLD in all depth and angle selections. By increasing the baffle angle, from 0 ° to 80 ° at the water depths of 4, 5.2 and 6.4 cm, the control forces are increased 59.8%, 38.4% and 30.2% respectively for rectangular TLD and 58.4%, 50.4% and 46.1% for cylindrical TLD. | ||
| کلیدواژهها | ||
| frequency؛ Rectangular And Cylindrical TLD؛ Returning Force؛ Rotatable Baffles؛ Water Pressure | ||
| مراجع | ||
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Bhosale, A.D. and Murudi, M.M. (2017). "Seismic control of structures using sloped bottom tuned liquid dampers", Structural Engineering and Mechanics journal, 64(2), 233-241.
Cassolato, M.R., Love, J.S. and Tait, M.J. (2011). "Modelling of a tuned liquid damper with inclined damping screens", Structural Control and Health Monitoring Journal, 18(6), 674-681.
Cheng, C.W., Lee, H.H. and Luo, Y.T. (2015). "Experimental study of controllable MR-TLCD applied to the mitigation of structure vibration", 15(6), 1481-1501.
Crowley, S. and Porter, R. (2012), "An analysis of screen arrangements for a tuned liquid damper", Journal of Fluids and Structures, 34, 291-309.
Fujino, Y., Chaiseri, P. and Sun, L.M. (1988). "Parametric studies on Tuned Liquid Damper (TLD) using circular containers by free-oscillation experiments", Journal of Structural Engineering, 5(2), 177-187.
Hamelin, J.A., Love, J.S., Tait, M.J. and Wilson, J.C. (2013). "Tuned liquid dampers with a Keulegan-Carpenter number-dependent screen drag coefficient", Journal of Fluids and Structures, 43, 271-286.
Housner, G.W. (1963). "The dynamic behavior of water tanks", Journal of Bulletin of the Seismological Society of America, 53(2), 381-387.
Lee, H.H. and Juang, H.H. (2012). "Experimental study on the vibration mitigation of offshore tension leg platform system with UWTLCD", Smart Structures and Systems journal, 9(1), 71-104.
Love, J.S. and Tait, M.J. (2010). "Nonlinear simulation of a tuned liquid damper with damping screens using a modal expansion technique", Journal of Fluids and Structure, 26(7-8), 1058-77.
Love, J.S. and Tait, M.J. (2013). "Nonlinear multimodal model for TLD of irregular tank geometry and small fluid", Journal of Fluids and Structure, 43, 83-99.
Modi, V.J. and Welt, F. (1987). "Vibration control using nutation dampers", Proceedings of the International conference on Flow induced vibrations, BHRA, London, 369-376.
Molin, B. and Remy, F. (2013). "Experimental and numerical study of the sloshing motion in a rectangular tank with a perforated screen", Journal of Fluids and Structures, 43, 463-480.
Razavi, H.M. and Shariatmadar, H. (2015). "Optimum parameters for tuned mass damper using shuffled complex evolution (SCE) algorithm", Civil Engineering Infrastructures Journal, 48, 83-100.
Ruiz, O.R., Lopez-Garcia, D. and Taflanidis, A.A. (2016). "Modeling and experimental validation of a new type of tuned liquid damper", Journal of Acta Mechanica, 227(11), 3275-3294.
Sheng, D., Huajan, L., Ming, L. and Takayama, T. (2002). "Experimental study on the effectiveness of TLDs under wave loading", Journal of Ocean University of Qingdao, 1(1), 80-86.
Tamura, Y., Fujii, K., Ohtsuki, T., Wakahara, T. and Kohsaka, R. (1995). "Effectiveness of tuned liquid dampers under wind excitation", Journal of Engineering Structures, 17(9), 609-621.
Wakahara, T., Shimada, K. and Tamura, Y. (1994). "Practical application of tuned liquid damper for tall buildings", Proceedings of the 12th ASCE Structures Congress, Atlanta, Georgia, USA, 851-856.
Wu, C.H., Faltinsen, O.M. and Chen, B.F. (2012). "Numerical study of sloshing liquid in tanks with baffles by time-independent finite difference and fictitious cell method", Journal of Computers and Fluids, 63, 9-26.
Zahrai, S.M. and Kavand, A. (2008). "Strong ground motion effects on seismic response reduction by TLCDs'", Scientia Iranica, 15(3), 275-285.
Zahrai, S.M., Abbasi, S., Samali, B. and Vrcelj, Z. (2012). "Experimental investigation of utilizing TLD with baffles in a scaled down 5-story benchmark building", Journal of Fluids and Structures, 28, 194-210.
Zahrai, S.M. and Enayati, E. (2017). "A variably baffled Tuned Liquid Damper to reduce seismic response of a 5-story building", Proceedings of the Institution of Civil Engineers: Structures and Buildings, 170(10), 1-10. | ||
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