Wind and Structures

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Reliability of structures with tuned mass dampers under wind-induced motion: a serviceability consideration

  • Pozos-Estrada, A. (Department of Civil and Environmental Engineering, University of Western Ontario) ;
  • Hong, H.P. (Department of Civil and Environmental Engineering, University of Western Ontario) ;
  • Galsworthy, J.K. (Department of Civil and Environmental Engineering, University of Western Ontario)
  • Received : 2009.10.01
  • Accepted : 2010.07.30
  • Published : 2011.03.25
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Abstract

Excessive wind-induced motion in tall buildings can cause discomfort, affect health, and disrupt the daily activities of the occupants of a building. Dynamic vibration absorbers such as the tuned mass dampers (TMDs) can be used to reduce the wind-induced motion below a specified tolerable serviceability limit state (SLS) criterion. This study investigates whether the same probability of not exceeding specified wind-induced motion levels can be achieved by torsionally sensitive structures without/with linear/nonlinear TMDs subjected to partially correlated wind forces, if they are designed to just meet the same SLS criterion. For the analyses, different structures and the uncertainty in the response, wind load and perception of motion is considered. Numerical results indicate that for structures that are designed or retrofitted without or with optimum linear TMDs and satisfying the same SLS criterion, their probability of exceeding the considered criterion is very consistent, if the inherent correlation between the wind forces is considered in design. However, this consistency deteriorates if nonlinear TMDs are employed. Furthermore, if the correlation is ignored in the design, in many cases a slightly unconservative design, as compared to the designed by considering correlation, is achieved.

Keywords

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