Definition of conservative design values of the residuals of seismic response parameters of RC frames

A previously proposed probabilistic method is extended, with the appropriate modifications, to the definition of conservative design values of the residuals of seismic response parameters of reinforced concrete frames. These values, characterized by predefined non-exceedance probabilities, are calculated using a limited number of generated accelerograms. The method utilizes a value of the response estimate modified with an amplification factor defined as a function of the coefficient of variation of the response and of the predefined non-exceedance probability. The method is validated with reference to the residual values of the response parameters of four reinforced concrete model frames with different aspect ratios and natural periods, designed according to the EC8 provisions.