Advertisement

Modeling and Simulation of Non-stationary Thunderstorm Outflows

  • M. CianoEmail author
  • M. Gioffrè
  • V. Gusella
  • M. Grigoriu
Conference paper
Part of the Lecture Notes in Civil Engineering book series (LNCE, volume 27)

Abstract

Wind action on structures is commonly estimated under the stationary assumption that is related to the phenomena that occur in neutral atmospheric conditions at the synoptic scale with velocity profiles in equilibrium with the atmospheric boundary layer. Nevertheless, when thunderstorm outflows are concerned the wind induced load description should take into account its inherent non-stationary features. In this paper a non-stationary model is proposed to describe wind velocity fluctuations of a typical thunderstorm in the northern Italian coast. This model can be obtained by modulating both amplitude and frequency of a stationary process. First, experimental time histories are used to calibrate the non-stationary model, then a parametric dynamic response study to stationary and non-stationary wind loads is finally investigated.

Keywords

Thunderstorm outflows Wind-excited structures Non-stationary excitation Simulation methods Monte Carlo simulation 

Notes

Acknowledgments

These Authors are indebted to Prof. Giovanni Solari for providing the wind velocity time series used in this work. The support of Ing. Stefano Fioravanti is also gratefully acknowledged.

References

  1. 1.
    Gioffrè M, Gusella V (2007) Peak response of a nonlinear beam. J Eng Mech 133(9):963–969CrossRefGoogle Scholar
  2. 2.
    Cluni F, Gioffrè M, Gusella V (2013) Dynamic response of tall buildings to wind loads by reduced order equivalent shear-beam models. J Wind Eng Ind Aerody 123:339–348CrossRefGoogle Scholar
  3. 3.
    Ouyang Z, Spence SMJ (2019) A performance-based damage estimation framework for the building envelope of wind-excited engineered structures. J Wind Eng Ind Aerodyn 186:139–154CrossRefGoogle Scholar
  4. 4.
    Aboshosha H, El Damatty A (2015) Engineering method for estimating the reactions of transmission line conductors under downburst winds. Eng Struct 99:272–284CrossRefGoogle Scholar
  5. 5.
    Chen L, Letchford C (2004) Parametric study on the along-wind response of the caarc building to downbursts in the time domain. J Wind Eng Ind Aerodyn 92(9):703–724CrossRefGoogle Scholar
  6. 6.
    Chen L, Letchford C (2007) Numerical simulation of extreme winds from thunderstorm downbursts. J Wind Eng Ind Aerodyn 95(9–11):977–990CrossRefGoogle Scholar
  7. 7.
    Chen X (2008) Analysis of alongwind tall building response to transient nonstationary winds. J Struct Eng 134(5):782–791CrossRefGoogle Scholar
  8. 8.
    Choi EC, Hidayat FA (2002) Dynamic response of structures to thunderstorm winds. Prog Struct Eng Mat 4(4):408–416CrossRefGoogle Scholar
  9. 9.
    Deodatis G (1996) Simulation of ergodic multivariate stochastic processes. J Eng Mech 122(8):778–787.  https://doi.org/10.1061/(ASCE)0733-9399(1996)122:8(778)CrossRefGoogle Scholar
  10. 10.
    Grigoriu M, Ruiz SE, Rosenblueth E (1988) The mexico earthquake of september 19, 1985 – nonstationary models of seismic ground acceleration. Earthq Spectra 4(3):551–568CrossRefGoogle Scholar
  11. 11.
    Hadjian A (1981) Seismic response of structures by the response spectrum method. Nucl Eng Des 66(2):179–201CrossRefGoogle Scholar
  12. 12.
    Huang G, Chen X, Liao H, Li M (2013) Predicting tall building response to nonstationary winds using multiple wind speed samples. Wind Struct 17(2):227–244CrossRefGoogle Scholar
  13. 13.
    Kwon DK, Kareem A (2009) Gust-front factor: new framework for wind load effects on structures. J Struct Eng 135(6):717–732CrossRefGoogle Scholar
  14. 14.
    Le TH, Caracoglia L (2015) Reduced-order wavelet-galerkin solution for the coupled, nonlinear stochastic response of slender buildings in transient winds. J Sound Vib 344:179–208CrossRefGoogle Scholar
  15. 15.
    Newmark NM (1959) A method of computation for structural dynamics. J Eng Mech Div 85(3):67–94Google Scholar
  16. 16.
    Simiu E, Scanlan R (1996) Winds effects on structures: fundamentals and applications to design. A Wiley-Interscience Publication, Wiley. https://books.google.it/books?id=DcSZTIMZObEC
  17. 17.
    Solari G (1989) Wind response spectrum. J Eng Mech 115(9):2057–2073CrossRefGoogle Scholar
  18. 18.
    Solari G, Burlando M, De Gaetano P, Repetto MP (2015) Characteristics of thunderstorms relevant to the wind loading of structures. Wind Struct 20(6):763–791CrossRefGoogle Scholar
  19. 19.
    Solari G, De Gaetano P, Repetto MP (2015) Thunderstorm response spectrum: fundamentals and case study. J Wind Eng Ind Aerodyn 143:62–77CrossRefGoogle Scholar
  20. 20.
    Solari G, Rainisio D, De Gaetano P (2017) Hybrid simulation of thunderstorm outflows and wind-excited response of structures. Meccanica 52(13):3197–3220MathSciNetCrossRefGoogle Scholar

Copyright information

© Springer Nature Switzerland AG 2019

Authors and Affiliations

  • M. Ciano
    • 1
    Email author
  • M. Gioffrè
    • 1
  • V. Gusella
    • 1
  • M. Grigoriu
    • 2
  1. 1.Department of Civil and Environmental EngineeringUniversity of PerugiaPerugiaItaly
  2. 2.Department of Civil and Environmental EngineeringCornell UniversityIthacaUSA

Personalised recommendations