TY - GEN
T1 - Pushover analysis of rocking façades in masonry churches
T2 - 19th ANIDIS Conference, Seismic Engineering in Italy
AU - Argiento, Luca Umberto
AU - Mousavian, Elham
AU - Casapulla, Claudia
AU - Ceroni, Francesca
N1 - Funding Information:
This work has been carried out under the financial support of the Italian Department of Civil Protection, within the ReLUIS-DPC 2022–24 Research Project, WP4 - MAppe di Rischio e Scenari di danno sismico (MARS-2).
Publisher Copyright:
© 2023 The Authors. Published by Elsevier B.V.
PY - 2023/2/9
Y1 - 2023/2/9
N2 - The out-of-plane failure of façades is one of the most typical local mechanisms in masonry churches recognizable in the aftermath of a seismic event. The analysis of such a failure is addressed in this paper with reference to a small sample of existing masonry churches hit by the seismic event of 21st August 2017 in the Ischia Island (Italy). The main aim is to assess the influence of the geometric parameters of the façades and of the interlocked sidewalls on the vulnerability of the façades to out-of-plane mechanisms, using nonlinear static analysis. According to the displacement-based approach, the pushover analysis is carried out considering the geometric nonlinearity, namely by evaluating the static multiplier for varied kinematic configurations, and by means of a macro-block model involving the stabilising contribution of frictional resistances exerted by the sidewalls of the churches. In order to develop seismic assessments, the seismic demand is represented by ADRS (acceleration-displacement response spectra) for different limit states, obtained according to the Italian seismic code. Then, the capacity is compared with the seismic demand in terms of both forces and displacements and the relevant influence of the frictional resistances and of some geometric parameters on the response are highlighted. Finally, the capacity curves are critically discussed in order to identify ‘a posteriori' homogeneous classes of façades within the examined sample in terms of vulnerability and to develop future statistical analyses and fragility curves for the individuated homogeneous classes.
AB - The out-of-plane failure of façades is one of the most typical local mechanisms in masonry churches recognizable in the aftermath of a seismic event. The analysis of such a failure is addressed in this paper with reference to a small sample of existing masonry churches hit by the seismic event of 21st August 2017 in the Ischia Island (Italy). The main aim is to assess the influence of the geometric parameters of the façades and of the interlocked sidewalls on the vulnerability of the façades to out-of-plane mechanisms, using nonlinear static analysis. According to the displacement-based approach, the pushover analysis is carried out considering the geometric nonlinearity, namely by evaluating the static multiplier for varied kinematic configurations, and by means of a macro-block model involving the stabilising contribution of frictional resistances exerted by the sidewalls of the churches. In order to develop seismic assessments, the seismic demand is represented by ADRS (acceleration-displacement response spectra) for different limit states, obtained according to the Italian seismic code. Then, the capacity is compared with the seismic demand in terms of both forces and displacements and the relevant influence of the frictional resistances and of some geometric parameters on the response are highlighted. Finally, the capacity curves are critically discussed in order to identify ‘a posteriori' homogeneous classes of façades within the examined sample in terms of vulnerability and to develop future statistical analyses and fragility curves for the individuated homogeneous classes.
KW - ADRS
KW - frictional resistances
KW - non-linear kinematic analysis
KW - out-of-plane behaviour
KW - vulnerability classes
U2 - 10.1016/j.prostr.2023.01.178
DO - 10.1016/j.prostr.2023.01.178
M3 - Conference contribution
AN - SCOPUS:85159098998
T3 - Procedia Structural Integrity
SP - 1388
EP - 1395
BT - 19th ANIDIS Conference, Seismic Engineering in Italy
A2 - Ferro, Giuseppe Andrea
A2 - Restuccia, Luciana
PB - Elsevier
Y2 - 11 September 2022 through 15 September 2022
ER -