GNGTS 2023 - Atti del 41° Convegno Nazionale

Session 2.2 GNGTS 2023 (a) (b) (c) Fig. 1 –Numerical model of (a) glass panel and (b) multi-story building (full-scale application); and (c) the schematic detail of glass-to-frame connection where c means nominal ‘clearance’. Results and conclusions As presented in ATC-58 Guidelines, the fragility curve is calculated as the standard normal cumulative distribution function, denoted with the character Φ , of exceeding a limit value (indicated in Eq.1 with ds ) of the Engineering Demand Parameter (EDP) given an earthquake represented by a seismic intensity measure (IM): 1 ( ≥ | ) = Φ ln θ ( ) β ( ) For the sake of clarity, the numerical procedure investigated (i.e., Cloud methodology) consists in considering the data couple (ln(IM), ln(EDP)) and carrying out a linear regression analysis in order to derive the mean, θ , and the standard deviation, β , as follows: 2 θ = exp ( + ( )) 3 β = =1 ∑ ( ⁡( )− + ln ( ) ( ) 2 −2