SEISMIC PERFORMANCE OF HIGH-RISE STRUCTURE BY APPLYING BASE ISOLATOR AND FLUID VISCOUS DAMPER SIMULTANEOUSLy

Abstract

The Construction of high-rise buildings with base isolation and the fluid viscous damper is the most effective technique used to minimize structural collapse. This study examines a numerical investigation of the nonlinear seismic response of regular RCC structures by using a base isolator and FVD under severe earthquake acceleration, rested on rock soil type with diagonal damper configurations using Etabs2016 software. A 4-story 3D frame building is validated. After the analysis is completed on the validated RCC frame, a parametric exploration is held on a 15-story RCC frame building by the simultaneous application of base isolator and fluid viscous damper under three earthquake accelerations, rested on soil types B and C having two different damper configurations. Results obtained from the parametric examination show that Story displacement for model-1 is increased by a maximum value of 49.72% and 51.10% on model-2 respectively. while for the same soil types, but for model-3 the story displacement is increased by a maximum value of 37.515% and 39.33% respectively. The obtained story displacement result under the imperial valley ground motion is significantly higher than for the same building model subjected to N.Palm Springs and Chi-Chi, Taiwan earthquake acceleration, for both soil types, and damper configurations. in a similar way, the fundamental period of model-1 is increased at a maximum value of 25.78% and 27.10% respectively on model-2. The Base shear induced on model -1 is large when compared with the two models. outputs from the parametric study show that base shear is reduced by a maximum value of 51.180% and 53.85%, at the base on model -2 respectively. In this study maximum story drift result is recorded at the lower story nearer to the base. Though the story drifts on model-1 are increased by a maximum value of 29.54% and 39.41% on model-2 respectively. When comparing the story acceleration on model-1, with model-2 and model-3, it decreases by a maximum value of 76.08% and 74.22% on model-2 respectively at the top story. The Investigation is carried out by the nonlinear time history analysis method. Overall the simultaneous application of base isolator and fluid viscous damper shows a large significance on soil type -C with exterior damper configuration.