This contribution assesses in stochastic terms the safety level of masonry façades potentially subjected to out-of-plane loading and the beneficial effect offered by horizontal restraints – such as steel tie rods - under earthquakes. A parametric analysis is performed on façades of different slenderness and size to state their influence on the response in probabilistic terms, showing that velocity and energy based Intensity Measures are optimal since they usually re-spect the efficiency and practicality criteria. In case of retrofitting interventions, the univariate FCs can be plotted in the two configurations (with and without steel tie rods). In order to ef-fectively present the results, the graph of the difference of conditional probability is elaborat-ed, which directly gives the information on the earthquake intensity for which the level of im-provement is more relevant. Univariate and bivariate curves are also compared and the for-mer may be not in favor of safety, especially for stronger seismic records. This probabilistic procedure is ideal for applications in earthquake engineering, assessing in stochastic sense the level of improvement obtained with traditional retrofitting solutions.

Stochastic assessment of rocking masonry façades under real seismic records / Giresini, L.; Taddei, F.; Casapulla, C.; Mueller, G.. - (2019), pp. 673-689. (Intervento presentato al convegno COMPDYN 2019 7th ECCOMAS Thematic Conference on Computational Methods in Structural Dynamics and Earthquake Engineering tenutosi a Creta, Grecia) [10.7712/120119.6948.19345].

Stochastic assessment of rocking masonry façades under real seismic records

Giresini L.;
2019

Abstract

This contribution assesses in stochastic terms the safety level of masonry façades potentially subjected to out-of-plane loading and the beneficial effect offered by horizontal restraints – such as steel tie rods - under earthquakes. A parametric analysis is performed on façades of different slenderness and size to state their influence on the response in probabilistic terms, showing that velocity and energy based Intensity Measures are optimal since they usually re-spect the efficiency and practicality criteria. In case of retrofitting interventions, the univariate FCs can be plotted in the two configurations (with and without steel tie rods). In order to ef-fectively present the results, the graph of the difference of conditional probability is elaborat-ed, which directly gives the information on the earthquake intensity for which the level of im-provement is more relevant. Univariate and bivariate curves are also compared and the for-mer may be not in favor of safety, especially for stronger seismic records. This probabilistic procedure is ideal for applications in earthquake engineering, assessing in stochastic sense the level of improvement obtained with traditional retrofitting solutions.
2019
COMPDYN 2019 7th ECCOMAS Thematic Conference on Computational Methods in Structural Dynamics and Earthquake Engineering
rocking; fragility curves; horizontal restraints; tie-rods; existing masonry; historic masonry
04 Pubblicazione in atti di convegno::04b Atto di convegno in volume
Stochastic assessment of rocking masonry façades under real seismic records / Giresini, L.; Taddei, F.; Casapulla, C.; Mueller, G.. - (2019), pp. 673-689. (Intervento presentato al convegno COMPDYN 2019 7th ECCOMAS Thematic Conference on Computational Methods in Structural Dynamics and Earthquake Engineering tenutosi a Creta, Grecia) [10.7712/120119.6948.19345].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1635899
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