Effects of supplemental viscous damping on seismic response of asymmetric-plan systems

• Published in: Earthquake engineering & structural dynamics Vol. 27; no. 2; pp. 125 - 141
• Main Author: Goel, Rakesh K.
• Format: Journal Article
• Language: English
• Published: New York John Wiley & Sons, Ltd 01.02.1998; Wiley
• Subjects: asymmetric buildings; Earth sciences; Earth, ocean, space; earthquake response; Engineering and environment geology. Geothermics; Engineering geology; Exact sciences and technology; passive control; plan asymmetry; protective systems; seismic response; supplemental damping; torsion; torsion; buildings; deformation; asymmetry; protection; ground motion; earthquakes
• ISSN: 0098-8847; 1096-9845
• DOI: 10.1002/(SICI)1096-9845(199802)27:2<125::AID-EQE720>3.0.CO;2-6

Coupling between lateral and torsional motions may lead to much larger edge deformations in asymmetric‐plan systems compared to systems with a symmetric plan. Supplemental viscous damping has been found to be effective in reducing deformations in the symmetric‐plan system. This investigation examined how supplemental damping affects the edge deformations in asymmetric‐plan systems. First, the parameters that characterize supplemental viscous damping and its plan‐wise distribution were identified, and then the effects of these parameters on edge deformations were investigated. It was found that supplemental damping reduces edge deformations and that reductions by a factor of up three are feasible with proper selection of system parameters. Furthermore, viscous damping may be used to reduce edge deformations in asymmetric‐plan systems to levels equal to or smaller than those in the corresponding symmetric‐plan system. © 1998 John Wiley & Sons, Ltd.