NEHRP Clearinghouse

Title
Experimental Performance and Analytical Study of a Non-Ductile Reinforced Concrete Frame Structure Retrofitted with Elastomeric Spring Dampers.
File
PB96137161.pdf
Author(s)
Pekcan, G.; Mander, J. B.; Chen, S. S.
Source
National Science Foundation, Arlington, VA.; New York State Science and Technology Foundation, Albany., July 14, 1995, 151 p.
Identifying Number(s)
NCEER-95-0010
Abstract
This experimental study describes the use of elastomeric spring dampers, which have a distinct re-centering capability. The dampers were used to retrofit a non-ductile, previously damaged 1/3 scale model reinforced concrete building frame. The structure was then subjected to a variety of ground motions in shaking table tests. A velocity dependent analytical model is developed and verified for the elastomeric spring dampers. This model is implemented in the widely available non-linear dynamic time history analysis computer program DRAIN-2DX to produce response predictions which are in good agreement with experimental observations. The elastomeric spring damper devices significantly attenuate the seismic response of the structure and provide a considerable amount of energy dissipation while the main non-ductile reinforced concrete structural load carrying elements remain elastic. The effect of varying the damper configuration on the structural response was also investigated.
Keywords
Shock absorbers; Earthquake resistant structures; Friction; Spring damper systems; Reinforced concrete; Vibration damping; Shear properties; Elastomers; Compressibility; Viscosity; Structural analysis; Dynamic analysis