Direct Displacement Based Design for Reinforced Concrete Framed Structures with Seismic Isolation

Direct displacement-based design is a nonlinear static procedure and has to check the suitability of method against different types ground motions namely far field, near field forward directivity fling step. The applied for buildings supported on fixed base hysteretic isolation bearings. Seismic isolators are provided between foundation superstructure minimize influence motion superstructure. four, eight twelve storey reinforced concrete frame structures equipped with without seismic isolators. Lead rubber bearing used as An equivalent damping ratio, derived from particular characteristics bearings, suggested. energy dissipation mechanism in controls displacement structure within acceptable limits at level isolator. results were validated time history analysis found be good agreement methodology motions. performance building was measured interstorey drift period, acceleration top floor, shear, isolator displacement. This an attempt link direct subjected directivity, step