PSI - Issue 44

Devis Sonda et al. / Procedia Structural Integrity 44 (2023) 115–122 Devis Sonda et al. / Structural Integrity Procedia 00 (2022) 000–000

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Fig. 5. Graph of comparison between energy dissipated by existing structure (red) and new equivalent building (green). The shape of the graph of the existing structure can provide useful information on the weaknesses of the building. It shows significant asymmetry, with major extension in the vertical axis of deformability, which highlights the deformability capacity of the structure due to the absence of interference with non-structural elements, but strongly conditioned by structural irregularity. In the horizontal axis of ductility, the shape of the graph indicates the low capability of the structure to develop adequate ductility due to lack of connections between structural precast elements and because of the design characteristics of column sections. 5. Conclusions The rapid assessment procedure for the evaluation of seismic vulnerability of precast RC buildings (SISMO-Fast) is proposed to fill the void left by the absence of specific simple procedures for this structural typology. The energy balance approach and the reference to a new equivalent structure, with same characteristics of the existing one but designed by code, are the basis of the methodology. The SISMO-Fast procedure has been used, for rapid seismic vulnerability assessment of some industrial precast RC buildings in different seismic areas, providing always reliable results. The methodology is based on a different approach respect to what is present in the literature and requires the verification, through seismic vulnerability assessment performed by numerical models, and the calibration of the parameters used for its validation. A general approach based on a comparison in energy terms, has been developed for a specific category of buildings (precast RC buildings), but it could be extended, with appropriate adaptations, to other types of structures for which a set of synthesis parameters representing the specific seismic behavior must be defined. The proposed approach to quantifying seismic vulnerability can also provide a useful tool for identifying interventions that improve seismic performance of the structure. SISMO-Fast procedure is currently available online at the following link: www.sismocell.com/sismo-fast. References Calvi G.M., Pinho R., Magenes G., Bommer J.J., Restrepo-Vélez L.F. and Crowley H. (2006) Development of seismic vulnerability assessment methodologies over the past 30 years, ISET Journal of Earthquake Technology, Paper No. 472, Vol. 43, No. 3, September 2006, pp. 75-104 Bovo M., Praticò L., Savoia M., 2022. PRESSAFE disp: a method for the fast in plane seismic assessment of existing precast RC buildings after the Emilia earthquake of May 2012. Bulletin of Earthquake Engineering (2022) 20:2751–2794; https://doi.org/10.1007/s10518-022-01318-x Mazzotti C., Savoia M.,Chinni C., Perri G. - (2013) - Una metodologia speditiva per la valutazione di vulnerabilità sismica di edifici in muratura e calcestruzzo armato - Progettazione Sismica – Vol. 4, N. 2 De Matteis G., Zizi M. (2019) - Metodologie speditive per la valutazione della vulnerabilità sismica di chiese in muratura ad una navata: analisi preliminare di sensitività - Convegno Nazionale di Ingegneria Sismica, ANIDIS, Ascoli Piceno Dindar A.A. & al. - (2015) - Development of Earthquake Energy Demand Spectra - Earthquake Spectra V.31 N. 3 Chopra A.K. (1995) - Dynamics of Structures: Theory and Application to Earthquake Engineering - Prentice Hall Inc.; New Jersey Choi H., Kim J. (2009) - Evaluation of seismic energy demand and its application on design of buckling restrained braced frames - Structural Engineering and Mechanics, Vol 31, N. 1