GNGTS 2019 - Atti del 38° Convegno Nazionale

GNGTS 2019 S essione 2.2 339 The displacement demand was obtained from the elastic spectral displacement provided by the Italian Building Code (MIT, 2018) for a reference period VR = 100 years). The displacement capacity was calculated by investigating two possible different failure modes of each piers: shear and bending. The shear capacities were calculated according to the Italian Building Code (MIT, 2018), while the flexural capacities were calculated using the analytical moment-curvature relationship of the base cross-section proposed by Petrone and Monti (2019). In this context, simple analytical models are preferable not only because their implementation is much faster, but also because they allow for an easier derivation of sensitivity coefficients, based on which the effects of the uncertainties of the collected data on the output quantities of interest can be easily studied. Analytical tools can be in fact efficiently integrated into general assessment procedures of territorially distributed systems to expeditiously identify the most critical components, such as in this case. The following figure show some sample verifications in terms of displacement demand/ capacity comparisons on 4 different piers, where the capacity is quickly obtained from closed- form equations, whose input parameters are based on the data collected from the UAV survey. Fig. 3 - (a) Damage LS assessment in the longitudinal direction - (b) Collapse LS assessment in the longitudinal direction a) b) Acknowledgements. ReLUIS 2019–2021 project is acknowledged for the financial support given to the present research. References Marmo F., Demartino C., Candela G., Sulpizio C., Briseghella B., Spagnuolo R., Xiao Y. Vanzi I, Rosati L.; (2019). On the form of the Musmeci’s bridge over the Basento river. Engineering Structures, 191, 658-673. MIT (2018). Ministerial Decree: “NTC 2018 - Norme tecniche per le costruzioni (In Italian)”. Monti, G., Nisticò, N. (2002). Simple probability-based assessment of bridges under scenario earthquakes. Journal of Bridge Engineering, ASCE , 7(2), 104-114. Petrone F., Monti G. (2019). Unified code-compliant equations for bending and ductility capacity of full and hollow rectangular RC sections. Engineering Structures, 183, 805–815.