اثر ميراگرهاي لزج مايع در طراحي و بهسازي ساختمان هاي بتن آرمه تحت زلزله

EFFECTS OF FLUID VISCOUS DAMPERS ON SEISMIC DESIGN AND RETROFIT OF R.C. BUILDINGS

Fluid viscous dampers have been used more recently to improve seismic behavior of existing and or new buildings by dissipating energy through heat transfer. This paper presents an analytical evaluation of fluid viscous dampers used as additional diagonal braces in reinforced concrete frame structures. To this end, a series of inelastic time-history analysis of several frames incorporating these dampers were performed. The frames include three 1-story, three 5-story and three 10-story that have been analyzed under ElCentro, MexicoCity and Oakland earth-quakes. A parametric study about the damper specification has shown that the parameter of this study is damping constant of dampers. The study demonstrates that the dampers can reduce inelastic deformations and thus reduce displacements and damages of structure. Although, total base shear may increase to some extend, the internal shear forces in the original system are reduced.