SAFETY ASSESSMENT OF GRAVITY LOAD DESIGNED RC FRAMED BUILDINGS

A large number of gravity load designed (GLD) RC buildings are found in many 5 seismic-prone countries including India. Many of them were built before the advent of seismic 6 codes or with the utilization of old and inadequate seismic design criteria. Engineers and decision 7 makers need to have information on the seismic vulnerability of such buildings in a given region 8 for mitigation planning. The present study aims at evaluating the relative seismic vulnerability of 9 GLD building subjected to seismic hazards corresponding to various seismic zones of India. The 10 relative seismic vulnerability of GLD buildings for various site hazard conditions is estimated in 11 a practical ‘load and resistance factor’ format as per the 2000 SAC Federal Emergency 12 Management Agency (SAC-FEMA) guidelines. The results of this study show that the relative 13 vulnerability of the GLD building (with respect to a building designed for seismic forces) increases 14 many folds from lower to higher seismic zone. It also indicates that the GLD buildings existing in 15 higher seismic zones of India (IV and V) should be immediately uninhabited as an urgent 16 mitigation measure. 17 18

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