The roof lateral displacement for RC frames is very significant parameter in
performance based engineering and should be within acceptable limits as per the
requirement of different performance levels. Data obtained from the time history dynamic
analysis for a series of gravity load designed (GLD) RC frame was used as input data in a
statistical program called SPSS 16.0, and a statistical analysis was done and a power
equations was proposed to estimate the roof lateral displacement for the GLD RC frames.
Three equations were proposed for estimating the roof lateral displacement.The first one
is for the bare frame models, the second is for infilled frame models and the third is for
infilled frame with open ground story. The equations for estimating the roof lateral
displacement for GLD frames with different type of infill (bare, infilled and open ground
story models) are proved to be acceptable accuracy and they can be used to estimate the
roof lateral displacement for GLD RC frames if they meet the conditions set out.