Premium
Application of torsional tuned liquid column gas damper for plan‐asymmetric buildings
Author(s) -
Fu Chuan
Publication year - 2011
Publication title -
structural control and health monitoring
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.587
H-Index - 62
eISSN - 1545-2263
pISSN - 1545-2255
DOI - 10.1002/stc.380
Subject(s) - damper , structural engineering , piping , modal , engineering , vibration , harmonic , torsional vibration , mechanical engineering , physics , materials science , acoustics , polymer chemistry
In this paper, the control performance of the novel sealed, torsional tuned liquid column gas damper (TTLCGD) to reduce the coupled flexural torsional response of plan‐asymmetric buildings under wind or seismic loads is investigated. Applications of the TTLCGD with a sealed piping system to tall building effectively increase the modal structural damping. If the modal center of velocity lies within the floor plan, TTLCGD with its in plane curved piping section encloses this center for best efficiency. Based on the linearized equation of motion for the TTLCGD‐main structure system with respect to a selected natural frequency, the optimal parameters of TTLCGD are modally tuned by means of a geometrical transformation in analogy to the classical torsional tuned mechanical damper, TTMD, followed by fine‐tuning in the state space domain considering the influence of neighboring modes to improve the performance of TTLCGD. Numerical simulations of plan‐asymmetric space frames illustrate that TTLCGD is an effective control device in suppressing the time‐harmonic excitation and the earthquake response. Copyright © 2010 John Wiley & Sons, Ltd.