Influence of mechanical parameters on non-linear static analysis of masonry buildings: a relevant case-study

Bayesian Methodology for Probabilistic Description of Mechanical Parameters of Masonry Walls

“…The proposed procedure relies on a more general methodology defined by Croce et al (2018b) for the evaluation of statistical parameters of existing concrete. The methodology, based on the identification of classes by means of a GMM, can be used to estimate mechanical properties and their statistical parameters on the condition that enough data are available.…”

“…The proposed method relies on a more general original procedure for the identification of homogenous material classes in secondary databases of raw test results, illustrated by Croce et al (2018b). The rationale of the procedure, already successfully implemented to identify concrete classes (Croce et al 2018b) and reinforcing steel classes (Croce et al 2020) used in Italy during the 1960s, is to partition, by means of a cluster analysis based on Gaussian mixture models (GMMs) (Mclachlan and Peel 2000), a database of mechanical test results to recognize homogenous statistical populations of relevant mechanical parameters. In the following, the focus is on the main mechanical parameters of stone masonry: compressive strength, f m , elastic modulus, E, and shear modulus, G, but the method can be easily extended to other relevant parameters and different masonry typologies provided that adequate data sets of experimental results are available.…”

Probabilistic Seismic Assessment of Existing Masonry Buildings

“…Results fit very satisfactorily both in terms of ultimate resistance, as well as in terms of ultimate displacement, in all considered case studies. Detailed comparisons of the outcomes for two relevant case studies are reported in [4] and [7], referring to a two-story and a four-story masonry building, respectively. Results fit very satisfactorily both in terms of ultimate resistance, as well as in terms of ultimate displacement, in all considered case studies.…”

“…As mentioned before, a proper evaluation of the seismic performance requires a suitable definition of masonry mechanical parameters, duly considering that masonry is a non-homogeneous material characterized by an inelastic and anisotropic behavior. The identification of the appropriate force-displacement response of in-plane loaded walls is then particularly crucial as it significantly influences the results [4]. Moreover, depending on the material as well as on the texture, several masonry types can be detected in existing buildings, characterized by mechanical parameters varying in a very wide range.…”

“…Whatever the approach adopted, in any case results of the assessment are very sensitive to the masonry's mechanical parameters [4]. Since mechanical parameters of similar masonry typologies can vary in a very wide range; it is not surprising that contrasting conclusions can be derived about the assessment of a given construction simply modifying the assumed values of their relevant mechanical properties.…”