Wind and Structures

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Multi-objective shape optimization of tall buildings considering profitability and multidirectional wind-induced accelerations using CFD, surrogates, and the reduced basis approach

  • Montoya, Miguel Cid (Structural Mechanics Group, School of Civil Engineering, University of La Coruna) ;
  • Nieto, Felix (Structural Mechanics Group, School of Civil Engineering, University of La Coruna) ;
  • Hernandez, Santiago (Structural Mechanics Group, School of Civil Engineering, University of La Coruna)
  • Received : 2021.01.15
  • Accepted : 2021.02.20
  • Published : 2021.04.25
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Abstract

Shape optimization of tall buildings is an efficient approach to mitigate wind-induced effects. Several studies have demonstrated the potential of shape modifications to improve the building's aerodynamic properties. On the other hand, it is well-known that the cross-section geometry has a direct impact in the floor area availability and subsequently in the building's profitability. Hence, it is of interest for the designers to find the balance between these two design criteria that may require contradictory design strategies. This study proposes a surrogate-based multi-objective optimization framework to tackle this design problem. Closed-form equations provided by the Eurocode are used to obtain the wind-induced responses for several wind directions, seeking to develop an industry-oriented approach. CFD-based surrogates emulate the aerodynamic response of the building cross-section, using as input parameters the cross-section geometry and the wind angle of attack. The definition of the building's modified plan shapes is done adopting the reduced basis approach, advancing the current strategies currently adopted in aerodynamic optimization of civil engineering structures. The multi-objective optimization problem is solved with both the classical weighted Sum Method and the Weighted Min-Max approach, which enables obtaining the complete Pareto front in both convex and non-convex regions. Two application examples are presented in this study to demonstrate the feasibility of the proposed strategy, which permits the identification of Pareto optima from which the designer can choose the most adequate design balancing profitability and occupant comfort.

Keywords

References

  1. Arora, J. (2004), Introduction to optimum design. Second Edition. Elsevier Academic Press.
  2. Bernardini, E., Spence, S.M.J., Wei, D. and Kareem, A. (2015), "Aerodynamic shape optimization of civil structures: A CFD-enabled Kriging-based approach", J. Wind Eng. Ind. Aerod., 144, 154-164. https://doi.org/10.1016/j.jweia.2015.03.011.
  3. Ding, F. and Kareem, A. (2018), "A multi-fidelity shape optimization via surrogate modelling for civil structures", J. Wind Eng. Ind. Aerod., 178, 49-56. https://doi.org/10.1016/j.jweia.2018.04.022.
  4. Elshaer, A., Bitsuamlak, G. and El Damatty, A. (2017), "Enhancing wind performancing of tall buildings using corner aerodynamic optimization", Eng. Struct., 136(1), 133-148. https://doi.org/10.1016/j.engstruct.2017.01.019.
  5. EN 1991-1-4 (2007) Eurocode 1: Actions on Structures. General actions, Part 1-4. Wind actions.
  6. Ferratero, A.J., Mazzilli, E.N.C. and Franca, L.S.R. (2015), "Wind-induced motion on tall buildings: A comfort criteria overview", J. Wind Eng. Ind. Aerod., 142, 26-42. https://doi.org/10.1016/j.jweia.2015.03.001.
  7. Forrester, A., Sobester, A. and Keane, A. (2008), Engineering Design via Surrogate Modelling, A Practical Guide. John Wiley & Sons Ltd.
  8. Gu, M., Wang, X. and Quan, Y. (2020), "Wind tunnel test study on effects of chamfered corners on the aerodynamic characteristics of 2D rectangular prisms", J. Wind Eng. Ind. Aerod., 204, 104305. https://doi.org/10.1016/j.jweia.2020.104305.
  9. Haftka, R.T. and Gurdal, Z. (2012), Elements of Structural Optimization. Springer Science & Business Media.
  10. Hernandez, S. (2010) "Structural optimization. 1960-2010 and beyond", Comput. Technol. Rev., 2, Topping, B.H.V., Adam, J.M., Pallares, F.J., Bru, R. and Romero, M.L. (Eds.) Saxe-Coburg Publications.
  11. ISO 10137 (2007), Bases for the Design of Structures - Serviceability of Buildings and Walkways Against Vibrations. International Organization for Standardization, Geneva.
  12. Jaouadi, Z., Abbas, T., Morgenthal, G. and Lahmer, T. (2020), "Single and multi-objective shape optimization of streamlined bridge decks", Struct. Multidiscipl. Optimiz., 61, 1494-1514. https://doi.org/10.1007/s00158-019-02431-3.
  13. Kareem, A., Kijewski, T. and Tamura, Y. (1999), "Mitigation of motions of tall buildings with specific examples of recent applications", Wind Struct., 2(3), 201-251. https://doi.org/10.12989/was.1999.2.3.201
  14. Kwok, K.C.S., Wilhelm, P.A., 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.
  15. Kwok, K.C.S., Hitchcock, P.A. and Burton, M.D. (2009), "Perception of vibration and occupant comfort in wind-excited tall buildings", J. Wind Eng. Ind. Aerod., 97(7-8), 368-380. https://doi.org/10.1016/j.jweia.2009.05.006.
  16. Kwok, K.C. (2013), "Wind-induced vibrations of structures: with special reference to tall building aerodynamics", Advan. Struct. Wind Eng., 121-155.
  17. Kwon, D.K. and Kareem, A. (2013), "Comparative study of major international wind codes and standards for wind effects on tall buildings", Eng. Struct., 51, 23-35. https://doi.org/10.1016/j.engstruct.2013.01.008.
  18. Liu, C.H., Rosenthal, S.S. and Strange, W.C. (2018), "The vertical city: Rent gradients, spatial structure, and agglomeration economies", J. Urban Economic., 106, 101-122. https://doi.org/10.1016/j.jue.2018.04.001.
  19. Melbourne, W.H. and Palmer, T.R. (1992), "Accelerations and comfort criteria for buildings undergoing complex motions", J. Wind Eng. Ind. Aerod., 41(1-3), 105-116. https://doi.org/10.1016/0167-6105(92)90398-T.
  20. Mooneghi, M.A. and Kargarmoakhar, R. (2016), "Aerodynamic mitigation and shape optimization of buildings: Review", J. Build. Eng., 6, 225-235. https://doi.org/10.1016/j.jobe.2016.01.009.
  21. Nakaguchi, H., Hashimoto, K. and Muto, S. (1968), "An experimental study on aerodynamic drag of rectangular cylinders", J. Japan Soc. Aeros. Space Sci., 16, 1-5.
  22. Nieto, F., Hernandez, S. and Cid Montoya, M. (2018), "Reduced basis approach for the shape optimization of the cross-section of tall buildings", In Proc. Of the 7th International Symposium on Computational Wind Engineering (CWE2018), Seoul.
  23. Nieto, F., Cid Montoya, M. and Hernandez, S. (2019), "Shape optimization of tall buildings considering wind directionality: Surrogate basis approach", In Proc. of the 15th International Conference on Wind Engineering (ICWE15). Beijing.
  24. Nieto, F., Cid Montoya, M. and Hernandez, S. (2020), "Numerical optimization of the corner shape of the cross-section of tall buildings considering profitability and along-wind response", In Proc. of the 2020 World Congress on Advances in Civil, Environmental, & Materials Research (ACEM20), Seoul.
  25. Luo, S.C., Yazdani, Md. G, Chew, Y.T. and Lee, T.S. (1994), "Effects of incidence and afterbody shape on flow past bluff cylinders", J. Wind Eng. Ind. Aerod., 53(3), 375-399. https://doi.org/10.1016/0167-6105(94)90092-2.
  26. Tamura, Y., Kareem, A., Solari, G., Kwok, K.C.S., Holmes, J.D. and Melbourne, W.H. (2005). "Aspects of the dynamic wind-induced response of structures and codification", Wind Struct., 8(4), 251-268. http://dx.doi.org/10.12989/was.2005.8.4.251.
  27. Tanaka, H., Tamura, Y., Ohtake, K., Nakai, M. and Kim, Y.C. (2012), "Experimental investigation of aerodynamic forces and wind pressures acting on tall buildings with various unconventional configurations", J. Wind Eng. Ind. Aerod., 107-108, 179-191. https://doi.org/10.1016/j.jweia.2012.04.014.
  28. Strelitz, Z. (2005), Tall Buildings: A Strategic Design Guide, British Council for Offices, and Royal Institute of British Architects (RIBA).
  29. Tse, K.T., Hitchcock, P.A., Kwok, K.C., Thepmongkorn, S. and Chan, C.M. (2009), "Economic perspectives of aerodynamic treatments of square tall buildings", J. Wind Eng. Ind. Aerod., 97(9-10), 455-467. https://doi.org/10.1016/j.jweia.2009.07.005.
  30. Vanderplaats, G.N. (2001), Numerical Optimization Techniques for Engineering Design. Third Edition; Vanderplaats Research & Development, Inc.
  31. Vickery, B.J. (1966), "Fluctuating lift and drag on a long cylinder of square cross-section in a smooth and in a turbulent stream", J. Fluid Mech., 25(3), 481-494. https://doi.org/10.1017/S002211206600020X.
  32. Watts, S. and Davis L. (2010), "The economics of high-rise", CTBUH J.,