Wind and Structures

  • 제11권2호
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  • Pages.153-178
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  • 2008
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  • 1226-6116(pISSN)
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  • 1598-6225(eISSN)
테크노프레스 (Techno-Press)
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DOI QR코드

DOI QR Code

Wind-induced lateral-torsional coupled responses of tall buildings

  • Wu, J.R. (Department of Civil Engineering, Jinan University) ;
  • Li, Q.S. (Department of Building and Construction, City University of Hong Kong Tat Chee Avenue) ;
  • Tuan, Alex Y. (Department of Civil Engineering, Tam Kang University)
  • 투고 : 2005.02.21
  • 심사 : 2008.03.03
  • 발행 : 2008.04.25
⟨ 이전 논문 다음 논문 ⟩

초록

Based on the empirical formulas for power spectra of generalized modal forces and local fluctuating wind forces in across-wind and torsional directions, the wind-induced lateral-torsional coupled response analysis of a representative rectangular tall building was conducted by setting various parameters such as eccentricities in centers of mass and/or rigidity and considering different torsional to lateral stiffness ratios. The eccentricity effects on the lateral-torsional coupled responses of the tall building were studied comprehensively by structural dynamic analysis. Extensive computational results indicated that the torsional responses at the geometric center of the building may be significantly affected by the eccentricities in the centers of mass and/or rigidity. Covariance responses were found to be in the same order of magnitude as the along-wind or across-wind responses in many eccentricity cases, suggesting that the lateral-torsional coupled effects on the overall wind-induced responses can not be neglected for such situations. The calculated results also demonstrated that the torsional motion contributed significantly to the total responses of rectangular tall buildings with mass and/or rigidity eccentricities. It was shown through this study that the framework presented in this paper provides a useful tool to evaluate the wind-induced lateral-torsional coupled responses of rectangular buildings, which will enable structural engineers in the preliminary design stages to assess the serviceability of tall buildings, potential structural vibration problems and the need for a detailed wind tunnel test.

키워드

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  2. Pressure integration technique for predicting wind-induced response in high-rise buildings vol.52, pp.4, 2013, https://doi.org/10.1016/j.aej.2013.08.006
  3. Influence of Turbulence, Orientation, and Site Configuration on the Response of Buildings to Extreme Wind vol.2014, 2014, https://doi.org/10.1155/2014/178465
  4. Investigation of the effects of free-stream turbulence on wind-induced responses of tall building by Large Eddy Simulation vol.18, pp.6, 2014, https://doi.org/10.12989/was.2014.18.6.599
  5. Free vibration analysis of tall buildings with outrigger-belt truss system vol.2, pp.1, 2011, https://doi.org/10.12989/eas.2011.2.1.089
  6. Correlation of wind load combinations including torsion on medium-rise buildings vol.15, pp.5, 2008, https://doi.org/10.12989/was.2012.15.5.423
  7. Acrosswind aeroelastic response of square tall buildings: a semi-analytical approach based of wind tunnel tests on rigid models vol.15, pp.6, 2012, https://doi.org/10.12989/was.2012.15.6.495