Wind and Structures

Techno-Press (테크노프레스)
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Wind tunnel study of a fish-plan shape model under different isolated wind incidences

  • Pal, Supriya (Delhi Technological University) ;
  • Meena, Rahul Kumar (Delhi Technological University) ;
  • Raj, Ritu (Faculty of Civil Engineering, Delhi Technological University) ;
  • Anbukumar, S. (Faculty of Civil Engineering, Delhi Technological University)
  • Received : 2020.12.03
  • Accepted : 2021.10.15
  • Published : 2021.11.25
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Abstract

This paper presents the results of an experimental investigation performed at an open circuit boundary layer wind tunnel carried out with the purpose to evaluate the performance of a solitary "Fish-plan shape" building model for various angles of wind incidences with a mean wind velocity of 10 m/s and turbulence intensity of 12%. Mean pressure coefficients of all the faces are calculated from pressure values for each direction of wind incidence and pressure contours are plotted and explained in detail for all faces. Detailed analysis of peak and average mean pressure coefficient for each face is carried out. From the present experiment, it is observed that at 00 wind incidence face-value of the windward face is lesser than for the standard square model at IS 875 (Part 3) 2015. The study also presents higher magnitudes of peak suction and pressure coefficients at skewed angles of wind incidences i.e., 300, 600, 1200, and 1500 due to stagnation of fluid near the adjacent edge of depressed exposed faces. The magnitude of the overturning moment in across wind direction is dominating the overall behavior of the model due to the unsymmetrical cross-sectional shape of the model in across-wind direction. The orientation of the building at 900 to wind incidence should be avoided due to the peak magnitudes of CMD, CML, and CMT as compared to other wind directions.

Keywords

Acknowledgement

Grateful acknowledgement is owed to Prof. A.K. Ahuja, Visiting Faculty, Civil Engineering Department, IIT Jammu (India). Without his support and invaluable suggestions this experimental study would not have been feasible.

References

  1. Ahmed, E., Bitsuamlak, G. and Damatty, A.E. (2017), "Enhancing wind performance of tall buildings using corner aerodynamic optimization", Eng. Struct., 136, 133-148. https://doi.org/10.1016/j.engstruct.2017.01.019
  2. Albert, S. and Richardson, Jr. (1986), "Bluff body arerodynamics", J. Struct. Eng., 12(7), 1723-1726.
  3. Alminhana, W.G., Braun, L.A. and Loredo-Souza, M.A. (2018), "A numerical-experimental investigation on the aerodynamic performance of CAARC building models with geometric modifications", J. Wind Eng. Ind. Aerod., 180, 34-48. https://doi.org/10.1016/j.jweia.2018.07.001.
  4. Amin, J.A. and Ahuja, A.K. (2011), "Experimental study of wind-induced pressures on buildings of various geometries", Int. J. Eng. Sci. Technol., 3(5), 1-19.
  5. AS/ NZS: 1170.2:2002 (2002), Structural Design Actions, Part 2: Wind Actions Australian/ New Zealand Standard.
  6. ASCE: 7-02 (2002), Minimum Design Loads for Buildings and Other Structures
  7. Bandi, E.K., Tamura, Y., Yoshidaa, A., Kim, Y.C. and Yang, Q. (2013), "Experimental investigation on aerodynamic characteristics of various triangular-section high-rise buildings", J. Wind Eng. Ind. Aerod., 122, 60-68. http://dx.doi.org/10.1016/j.jweia.2013.07.002.
  8. Bandi, E.K., Tanaka, H., Kim, Y., Ohtake, K., Tamura, Y. (2013), "Peak pressures acting on tall buildings with various configurations", Int. J. High.-Rise Build., 2, 229-244. https://doi.org/10.21022/IJHRB.2013.2.3.229
  9. Bhattacharyya, B. and Dalui, S.K. (2020), "Experimental and numerical study of wind-pressure distribution on irregular-plan-shaped building", J. Struct. Eng., 146(7), 04020137. https://doi.org/10.1061/(ASCE)ST.1943-541X.0002686.
  10. Bhattacharyya, B., Dalui, S.K. and Ahuja, A.K. (2014), "Wind induced pressure on 'E'plan shaped tall buildings", Jordan J. Civil Eng., 8, 120-134.
  11. BS 6399-2 (1997), British standard: loading for buildings part 2. Code of practice for wind loads, British Standard Institution.
  12. Chakraborty, S., Dalui, S.K. and Ahuja, A.K. (2014), "Wind load on irregular plan shaped tall building - a case study", Wind Struct., 19(1), 59-73. http://dx.doi.org/10.12989/was.2014.19.1.059.
  13. Chakraborty, S., Dalui, S.K., Ahuja, A.K. (2013), "Experimental and numerical study of surface-pressure on '+' plan shape tall building", J. Civil Eng., 8, 251-262.
  14. Cheng, L., Kit, M.L., Wong, S.Y. (2015), "POD analysis of crosswind forces on a tall building with square and H-shaped cross sections", Wind Struct., 21(1), 63-84. https://doi.org/10.12989/was.2015.21.1.063
  15. Cheng, X., Huang, G., Yang, Q. and Zhou, X. (2020), "Influence of architectural facades on wind pressures and aerodynamic forces of tall buildings", J. Struct. Eng., 147(1). https://doi.org/10.1061/(ASCE)ST.1943-541X.0002867.
  16. Elshaer, A. and Bitsuamlak, G. (2018), "Multiobjective aerodynamic optimization of tall building openings for wind-induced load reduction", J. Struct. Eng., 144(10), 04018198. https://doi.org/10.1061/(ASCE)ST.1943-541X.0002199.
  17. EN 1991-1-4 (2005), Euro Code 1: Actions on Structures - Wind Actions.
  18. Gaur, N. and Raj, R. (2020), "Wind load optimisation by aerodynamic mitigation techniques for tall buildings-A review", Solid State Technol., 63(2s); 5968-5986.
  19. Gomes, M.G., Rodrigues, A.M. and Pedro, M. (2005), "Experimental and numerical study of wind pressures on irregular-plan shapes", J. Wind Eng. Ind. Aerod., 93, 741-756. https://doi.org/10.1016/j.jweia.2005.08.008.
  20. Hayashida, H. and Iwasa, Y. (1990), "Aerodynamic shape effects of tall buildings for vortex induced vibration", J. Wind Eng. Ind. Aerod., 33, 237-242. https://doi.org/10.1016/j.jweia.2005.08.008.
  21. Heidari, M.R., Farahani, M., Soltani, M.R. and Taeibi-Rahni, M. (2009), "Investigations of supersonic flow around a long axisymmetric body", Transaction B: Mech. Eng., Scientia Iranica, 16(6), 534-544.
  22. IS: 875- Part-3 (2015), Code of Practice for Design Loads (other than earthquake loads) for Buildings and Structures- Wind Loads.
  23. Kwok, K.C.S. (1988), "Effect of building shape on wind-induced response of tall building", Advan. Eng., 381-390. https://doi.org/10.1016/B978-0-444-87156-5.50049-7.
  24. Kwok, K.C.S., Wilheim, P.A. and Wilkie, B.G. (1988), "Effect of edge configuration on wind-induced response of tall buildings", Eng. Struct., 10(2), 135-140. https://doi.org/10.1016/0141-0296(88)90039-9.
  25. Li, Y., Li, S.Q. and Chen, F. (2017), "Wind tunnel study of wind-induced torques on L-shaped tall buildings", J. Wind Eng. Ind. Aerod., 167, 41-50. http://dx.doi.org/10.1016/j.jweia.2017.04.013.
  26. Li, Y., Zhang, J.W. and Li, Q.S. (2014), "Experimental investigation of characteristics of torsional wind loads on rectangular tall buildings", Struct. Eng. Mech., 49(1), 129-145. https://doi.org/10.12989/sem.2014.49.1.129.
  27. Mallick, M., Kumar, A. and Patra, K.C. (2019), "Experimental investigation on the wind-induced pressures on C-shaped buildings", KSCE J. Civil Eng., 23(8), 3535-3546. https://doi.org/10.1007/s12205-019-1929-6.
  28. Ming, G. (2010), "Wind-resistant studies on tall buildings and structures", Sci. China, Technol. Sci., 53(10), 2630-2646. https://doi.org/10.1007/s11431-010-4016-2.
  29. Nagar, S.K., Raj, R. and Dev, N. (2020), "Experimental study of wind-induced pressures on tall buildings of different shapes", Wind Struct., 31(5), 441-453. https://doi.org/10.12989/was.2020.31.5.441.
  30. Nagar, S.K., Raj, R. and Dev, N. (2021), "Proximity effects between two plus-plan shaped high-rise buildings on mean and RMS pressure coefficients", Scientia Iranica.
  31. Paul, R. and Dalui, S.K. (2016), "Wind effects on 'Z' plan-shaped tall building: a case study", Int. J. Advan. Struct. Eng., 8, 319-335. https://doi.org/10.1007/s40091-016-0134-9.
  32. Sharma, A., Mittal, H. and Gairola, A. (2018), "Mitigation of wind load on tall buildings through aerodynamic modifications: Review", J. Build. Eng., 18, 180-194. https://doi.org/10.1016/j.jobe.2018.03.005.
  33. Sheng, R., Perret, L., Calmet, I., Demouge, F. and Guilhot, J. (2018), "Wind tunnel study of wind effects on a high-rise building at a scale of 1:300", J. Wind Eng. Ind. Aerod., 174, 391-403. https://doi.org/10.1016/j.jweia.2018.01.017.
  34. Singh, J. and Roy, A.K. (2019), "CFD simulation of the wind field around pyramidal roofed single.story buildings", SN Appl. Sci., 1, 1425. https://doi.org/10.1007/s42452-019-1476-2
  35. Singh, J. and Roy, A.K. (2019), "Wind pressure coefficients on pyramidal roof of square plan low rise double storey building", Comput Eng Phys Model, 2, 1-16. https://doi.org/10.22115/cepm.2019.144599.1043.
  36. Stathopoulos, T. (1985), "Wind environmental condition around tall buildings with chamfered corners", J. Wind Eng. Ind. Aerod., 21(1), 71-87. https://doi.org/10.1016/0167-6105(85)90034-0.
  37. Stathopoulos, T. and Zhou, Y. (1993), "Numerical simulation of wind induced pressures on buildings of various geometries", J. Wind Eng. Ind. Aerod., 46-47, 419-430. https://doi.org/10.1016/0167-6105(93)90308-B.
  38. Tamura, Y., Tanaka, H., Ohtake, K., Kim, Y.C., Yoshida, A., Bandi, E.K., Xu, X. and Yang, Q. (2015), "Aerodynamic control of wind-induced vibrations and flow around super-tall buildings", Proceedings of the 6th International Conference Adv. Exp. Strutural Eng. International Work. Adv. Smart Mater. Smart Strutures Technol. Urbana-Champaign.
  39. Xie, J. (2012), "Aerodynamic optimization in super-tall building designs", The Seventh International Colloquium on Bluff Body Aerodynamics and its Applications (BBAA7) Shanghai, China, 2-6.
  40. Zheng, C., Xie, Y., Khan, M., Wu, Y. and Liu, J. (2018), "Wind-induced responses of tall buildings under combined aerodynamic control", Eng. Struct., 175, 86-100. https://doi.org/10.1016/j.engstruct.2018.08.031.