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Seismic Performance of High-Rise Building Frames with Added Energy-Absorbing Devices

W.S.Pong, C.S.Tsai, G.C.Lee

NCEER-94-0016 | 6/20/1994 | 224 pages

About the Report:

TOC: The table of contents is provided.

Keywords: Added Energy-Absorbing Devices, Tapered Plate Energy Absorbing Devices (TPEA), Viscoelastic Dampers, Fluid Viscous Dampers, Numerical Studies, Parametric Studies, Frame Buildings, and Earthquake Engineering.

Abstract: This report is concerned with a study of two different devices, a combination of tapered-plate energy absorber (TPEA) and viscoelastic dampers and a combination of TPEA and fluid dampers. It starts with a general review of the developments in various energy dissipating devices. Then a finite element formulation for fluid dampers is developed for this study. A comparison is made between numerical solutions and experimental results when a 2/5 scale steel structure is equipped with added viscoelastic dampers. The structural response of high-rise buildings mounted with three energy absorbing devices, tapered-plate energy absorber (TPEA), viscoelastic dampers, fluid dampers, and two combined devices, TPEA and fluid dampers and TPEA and viscoelastic dampers, respectively, have been investigated. Next, a parametric study of TPEA devices for high-rise buildings is conducted. The selected response parameters in this study include: 1) story shear force; 2) floor displacement; 3) base shear force; and 4) ductility ratio. Finally, two combined devices, TPEA and viscoelastic dampers and TPEA and fluid dampers are examined. Results show such combined devices provide a strong safe-failure mechanism as reliable energy absorbing devices. They also can sustain a wide range of loadings from minor to severe earthquake ground motion and wind loads. The combined devices can compensate for each other's shortcomings so that a satisfactory design for wind loads and seismic hazard mitigation of the structures can be achieved.