Overstrength and ductility of reinforced concrete shear-wall frame buildings not designed for seismic loads

Abstract

The overstrength and ductility have been investigated for two typical reinforced concrete shear wall frame buildings using nonlinear pushover analysis. One is a 16 story slab block and the other is a 25 story point block. The structures are designed in accordance to British Standard BS 8110, which does not have any special provision for seismic loads. The seismic demand due to worst possible earthquake event, is compared with the capacity of the buildings on representative soil sites by plotting a capacity-demand curve. A retrofitting procedure using FRP (fiber reinforced polymers) on the shear wall of the critical 25 story point block is proposed through experimental and finite element verification and study.