DOI QR코드

DOI QR Code

Multi-dimensional extreme aerodynamic load calculation in super-large cooling towers under typical four-tower arrangements

  • Ke, Shitang (Department of Civil Engineering, Nanjing University of Aeronautics and Astronautics) ;
  • Wang, Hao (Department of Civil Engineering, Nanjing University of Aeronautics and Astronautics) ;
  • Ge, Yaojun (State Key Laboratory for Disaster Reduction in Civil Engineering, Tongji University)
  • 투고 : 2017.04.17
  • 심사 : 2017.07.19
  • 발행 : 2017.08.25

초록

Local transient extreme wind loads caused by group tower-related interference are among the major reasons that lead to wind-induced damage of super-large cooling towers. Four-tower arrangements are the most commonly seen patterns for super-large cooling towers. We considered five typical four-tower arrangements in engineering practice, namely, single row, rectangular, rhombic, L-shaped, and oblique L-shaped. Wind tunnel tests for rigid body were performed to determine the influence of different arrangements on static and dynamic wind loads and extreme interference effect. The most unfavorable working conditions (i.e., the largest overall wind loads) were determined based on the overall aerodynamic coefficient under different four-tower arrangements. Then we calculated the one-, two- and three-dimensional aerodynamic loads under different four-tower arrangements. Statistical analyses were performed on the wind pressure signals in the amplitude and time domains under the most unfavorable working conditions. On this basis, the non-Gaussian distribution characteristics of aerodynamic loads on the surface of the cooling towers under different four-tower arrangements were analyzed. We applied the Sadek-Simiu procedure to the calculation of two- and three-dimensional aerodynamic loads in the cooling towers under the four-tower arrangements, and the extreme wind load distribution patterns under the most unfavorable working conditions in each arrangement were compared. Finally, we proposed a uniform equation for fitting the extreme wind loads under the four-tower arrangements; the accuracy and reliability of the equation were verified. Our research findings will contribute to the optimization of the four-tower arrangements and the determination of extreme wind loads of super-large cooling towers.

키워드

과제정보

연구 과제 주관 기관 : National Natural Science Foundation, Jiangsu Province Outstanding Natural Science Foundation, Postdoctoral Science Foundation

참고문헌

  1. ASCE Structural Engineering Institute. (2012), "Wind Tunnel Testing for Buildings and Other Structures", ASCE 49-12-2012, The American Society of Civil Engineers.
  2. Bearman, P.W. (1967), "Wind forces and the proximity of cooling towers to each other", Nature, 216(5050), 735.
  3. Brosamler, G.A. (1988), "An almost everywhere central limit theorem", Mathematical Proceedings of the Cambridge Philosophical Society, 104(3), 561-574. https://doi.org/10.1017/S0305004100065750
  4. Cheng, X.X., Zhao, L., Ge, Y.J., Ke, S.T. and Liu, X.P. (2015), "Wind pressures on a large cooling tower", Adv. Struct. Eng., 18(2), 201-220. https://doi.org/10.1260/1369-4332.18.2.201
  5. Davenport, A.G. (1964), "Note on the distribution of the largest value of a random function with application to gust loading", Proceedings of the Institute of Civil Engineers, 28(2), 187-196. https://doi.org/10.1680/iicep.1964.10112
  6. Ding, J. and Chen, X. (2014), "Assessment of methods for extreme value analysis of non-Gaussian wind effects with short-term time history samples", Eng. Struct., 80, 75-88. https://doi.org/10.1016/j.engstruct.2014.08.041
  7. Ministry of Housing and Urban-Rural Development of People's Republic of China. (2014), "Standard for wind tunnel test of buildings and structures", JSJ/T 338-2014, China Building Industry Press. (in Chinese)
  8. Karakas, A.I., Ozgan, K. and Daloglu, A.T. (2016), "A parametric study for free vibration analysis of hyperbolic cooling towers on elastic foundation using consistent FEM-Vlasov model", Arch. Appl. Mech., 86(5), 869-882. https://doi.org/10.1007/s00419-015-1067-7
  9. Ke, S.T., Ge, Y.J., Zhao, L. and Tamura, Y. (2013), "Wind-induced responses characteristics on super-large cooling towers", J. Central South Univ. Technol., 20(11), 3216-3227. https://doi.org/10.1007/s11771-013-1846-7
  10. Ke, S.T., Ge, Y.J., Zhao, L. and Tamura, Y. (2015), "Stability and reinforcement analysis of super-large exhaust cooling towers based on a wind tunnel test", J. Struct. Eng. - ASCE, 141(12), 04015066. https://doi.org/10.1061/(ASCE)ST.1943-541X.0001309
  11. Ke, S.T. and Ge, Y.J. (2015), "Extreme wind pressures and non-Gaussian characteristics for super-large hyperbolic cooling towers considering aero-elastic effect", J. Eng. Mech. - ASCE, 141(7), 04015010. https://doi.org/10.1061/(ASCE)EM.1943-7889.0000922
  12. Li, G., Cao, W.B., Li, G., et al. (2013), "Structural analysis and optimization of large cooling tower subjected to wind loads based on the iteration of pressure", Struct. Eng. Mech., 46(5), 735-753. https://doi.org/10.12989/sem.2013.46.5.735
  13. Ministry of Housing and Urban-Rural Development of People's Republic of China. (2014), "Code for design of cooling for industrial recirculating water", GB/T 50102-2014, China Planning Press. (in Chinese)
  14. Ministry of Housing and Urban-Rural Development of People's Republic of China. (2012), "Lode code for the design of building structures", GB50009-2012, China Building Industry Press. (in Chinese)
  15. Moon, S.A., Lee, T.G., Hur, J.H., et al. (2008) "Study on the reentering rates of individual cooling towers installed on a building roof", Heat Mass Transfer, 44(11), 1345-1353. https://doi.org/10.1007/s00231-008-0373-9
  16. National Development and Reform Commission. (2006), "Code for hydraulic design of fossil fuel power plants", DL/T 5339-2006, China Electric Power Press. (in Chinese)
  17. Niemann, H.J. and Kopper, H.D. (1998) "Influence of adjacent buildings on wind effects on cooling towers", Eng. Struct., 20(10), 874-880. https://doi.org/10.1016/S0141-0296(97)00131-4
  18. Orlando, M. (2001), "Wind-induced interference effects on two adjacent cooling towers", Eng. Struct., 23(8), 979-992. https://doi.org/10.1016/S0141-0296(00)00110-3
  19. Pope, R.A. (1994), "Structural deficiencies of natural draught cooling towers at uk power stations. part 1: failures at ferrybridge and fiddlers ferry", Struct. Build., 104(1), 1-10. https://doi.org/10.1680/istbu.1994.25675
  20. Portela, G. and Godoy, L.A. (2005), "Shielding effects and buckling of steel tanks in tandem arrays under wind pressures", Wind Struct., 8(5), 325-342. https://doi.org/10.12989/was.2005.8.5.325
  21. Rajan, S.S., Babu, G.R., Arunachalam, S., et al. (2013), "Interference factors for natural draught cooling towers based on wind tunnel experiments", Proceedings of the 8th Asia-Pacific Conference on Wind Engineering.
  22. Ruscheweyh, H. (1975), "Wind loadings on hyperbolic natural draught cooling towers", J. Wind Eng. Ind. Aerod., 1(5), 335-340. https://doi.org/10.1016/0167-6105(75)90027-6
  23. Sadek, F. and Simiu, E. (2002), "Peak Non-Gaussian wind effects for database-assisted low-rise building design", J. Eng. Mech. - ASCE, 128(5), 530-539. https://doi.org/10.1061/(ASCE)0733-9399(2002)128:5(530)
  24. Sageau, J.F. (1980), "Caracterisation des champs de pression moyens et fluctuants a la surface des grands aerorefrigerants", La Houille Blanche, 20(1-2), 61-67. https://doi.org/10.1051/lhb/1980006
  25. Sun, T.F. and Gu, Z.F. (1995), "Interference between wind loading on group of structures", J. Wind Eng. Ind. Aerod., 54(55), 213-225.
  26. Swartz, S.E., Chien, C.C., Hu, K.K., et al. (1985), "Tests on microconcrete model of hyperbolic cooling tower", Exp. Mech., 25(1), 12-23. https://doi.org/10.1007/BF02329121
  27. VGB-Guideline. (2005), "Structural design of cooling tower-technical guideline for the structural design, computation and execution of cooling towers", VGB-R 610Ue, BTR Bautechnik bei Kuhlturmen, Standard Essen.
  28. Viladkar, M.N., Bhargava, P. and Godbole, P.N. (2006), "Static soil-structure interaction response of hyperbolic cooling towers to symmetrical wind loads", Eng. Struct., 28(9), 1236-1251. https://doi.org/10.1016/j.engstruct.2005.11.010
  29. Wittek, U. and Grote, K. (2015), "Substitute wind concept for elastic stability of cooling tower shells", Mater. Member Behavior, 500-513.
  30. Zareifard, H. and Khaledi, M.J. (2013), "Non-Gaussian modeling of spatial data using scale mixing of a unified skew Gaussian process", J. Multivariate Anal., 114(114), 16-28. https://doi.org/10.1016/j.jmva.2012.07.003
  31. Zhao, L. and Ge, Y.J. (2010), "Wind Loading Characteristics of super-large cooling towers", Wind Struct., 13(4), 257-274. https://doi.org/10.12989/was.2010.13.3.257

피인용 문헌

  1. Studies on the influence factors of wind dynamic responses on hyperbolic cooling tower shells vol.72, pp.5, 2019, https://doi.org/10.12989/sem.2019.72.5.541
  2. New Approach for Vibration Suppression through Restrictors on Towering Steel Columns with Supporting Frame vol.2020, pp.None, 2017, https://doi.org/10.1155/2020/8761750