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PROCEEDINGS OF THE ELEVENTH INTERNATIONAL CONFERENCE ON CIVIL, STRUCTURAL AND ENVIRONMENTAL ENGINEERING COMPUTING
Edited by: B.H.V. Topping
Time History Analysis for Wind Excited Tall Buildings with Tuned Mass Dampers
Department of Civil and Environmental Engineering, National University of Kaohsiung, Taiwan Republic of China
W.H. Lee, "Time History Analysis for Wind Excited Tall Buildings with Tuned Mass Dampers", in B.H.V. Topping, (Editor), "Proceedings of the Eleventh International Conference on Civil, Structural and Environmental Engineering Computing", Civil-Comp Press, Stirlingshire, UK, Paper 10, 2007. doi:10.4203/ccp.86.10
Keywords: tuned mass dampers, wind, tall buildings, damping, dynamic, nonlinear.
Tuned mass dampers (TMDs) are the most frequently used devices for reducing the wind-induced response of tall buildings in the past decades. Structural engineers require the time history response of a tall building with a TMD, as an alternative, to ensure the structural safety and the comfort of the occupants in the preliminary design of tall buildings. This paper presents a simulation method for analyzing the wind-induced time history response for tall buildings with and without TMDs installed. A more reasonable tall building model (cantilever model with high modes) and a more realistic wind load model (a non-white stochastic process in time and space) are employed to conduct the time domain response analysis. The nonlinear and variable damping effects induced by interaction between the building and the wind flows are carefully considered in the formulation. The suppression of wind induced roof displacement with a TMD is significantly effective. The prediction of vibration induced from wind loads by simulation, like the time history responses analysis for a seismic resistance design, is correspondingly important in the structural design
High-rise buildings are relatively light structural systems with low lateral stiffness from the point of a seismic design and are easily excited by strong winds. Therefore, various types of dampers have been developed in the past decades to reduce the vibration of tall buildings and to improve the comfort of occupants. Tuned mass dampers (TMDs), in either passive or active form, are the most frequently used devices for reducing wind-induced response particularly in relation to acceleration response with respect to the human comfort requirement. Considerable research papers have shown the reduction of dynamic response due to wind and earthquake loads of tall buildings with TMDs. Performance and parametric studies of TMDs under wind loads have been presented in the literature [1,2,3]. Also, the effectiveness of a TMD on the response of a single-degree-of-freedom (SDOF) can be readily estimated from the results in the previous parametric studies [4,5,6]. The theory of TMDs had already set criteria for the preliminary design of the devices.
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