PSI - Issue 44

Gianluca Salamida et al. / Procedia Structural Integrity 44 (2023) 131–138 Gianluca Salamida et al. / Structural Integrity Procedia 00 (2022) 000–000

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3. Seismic Scenarios Toolbox

Seismic Scenarios Toolbox is the second software tool developed, starting from the analysis of the ground motion recordings performed by GMAT, this software estimates shakemaps and, consequently, damage scenarios. A damage scenario represents a prediction of the damage suffered by buildings in an area. A procedure was implemented which combines the predicted ground motion intensity, data on the existing building stock with a series of fragility models. Residential unreinforced masonry and reinforced concrete frame buildings were considered in the present study. 3.1. Fragility models Fragility models are generally represented by curves expressing the probability of exceeding certain Damage States (DSs) as a function of a ground motion IM. All fragility models used in this work are referred to 5 damage levels defined according to the EMS-98 European Macro-seismic Scale, proposed by Grünthal (1998). Two different fragility models were used for unreinforced masonry buildings; the first, developed by Ioannou et al. (2021) and the second by Simoni et al. (2021), both obtained from the analysis of damage data after the 2012 Emilia earthquake. Several fragility models were used for RC frames buildings. The first model was proposed by Verderame et al. (2014) for two-storey and four-storey frame buildings, considering masonry infills. The second was derived by Salamida and Buratti (2021). The third model was developed by Secci (2020) by means of a statistical analysis on the observed damage data on reinforced concrete buildings after the 2009 L’Aquila seismic event. Fragility curves for 9 storey RC hotel were also used. The fragility models used in the present work are shown in Fig. 5.

Fig. 5. Adopted fragility models. For masonry buildings: (a) Iannou et al. (2021); (b) Simoni et al. (2021). For RC frame buildings: (c) Verderame et al. (2014) fragility models; (d) fragility curves obtained by Salamida and Buratti (2021); (e) Secci (2020) fragility model; (f) fragility curves in terms on average pseudo-acceleration over the period between 0,75 s and 1,5 s for the 9-storey building studied.