Seismic behaviour of asymmetric buildings with supplemental damping

✍ Scribed by Goel, Rakesh K.

• Publisher: John Wiley and Sons
• Year: 2000
• Tongue: English
• Weight: 236 KB
• Volume: 29
• Category: Article
• ISSN: 0098-8847
• DOI: 10.1002/(sici)1096-9845(200004)29:4<461::aid-eqe917>3.0.co;2-6

✦ Synopsis

This paper investigated the response of asymmetric-plan buildings with supplemental viscous damping to harmonic ground motion using modal analysis techniques. It is shown that most modal parameters, except dynamic ampli"cation factors (DAFs), are a!ected very little by the plan-wise distribution of supplemental damping in the practical range of system parameters. Plan-wise distribution of supplemental damping signi"cantly in#uences the DAFs, which, in turn, in#uence the modal deformations. These trends are directly related to the apparent modal damping ratios; the "rst modal damping ratio increases while the second decreases as CSD moves from right to left of the system plan, and their values increase with larger plan-wise spread of the supplemental damping. The largest reduction in the #exible edge deformation occurs when damping in the "rst mode is maximized by distributing the supplemental damping such that the damping eccentricity takes on the largest value with algebraic sign opposite to the structural eccentricity.