Abstract
This work is dedicated to the assessment of the nonlinear behaviour of masonry panels with regular texture and subject to in-plane loads, by means of numerical pushover analysis and an analytical homogenized model. Two numerical models are considered and adopted for performing a set of numerical tests: a discrete model developed by authors and a discrete/finite element model frequently adopted in rock mechanics field and effectively extended to masonry structures. In both models the hypotheses of rigid blocks and elastic–plastic joints following a Mohr–Coulomb yield criterion are adopted. The aim of this work is twofold: (1) a comparison and a calibration of the numerical models, evaluating their effectiveness in determining ultimate loads and collapse mechanisms of masonry panels, by assuming a nonlinear homogenized model for regular masonry as reference solution; (2) the evaluation of sensitivity of masonry behaviour and numerical models to panel dimension ratio and to varying masonry texture. In a first case study, sliding collapse mechanisms changing to overturning collapse mechanisms for increasing panel and block height-to-width ratio are obtained and the results given by the numerical models turn out to be in good agreement. Furthermore, a second case study, dedicated to square panels supported at base ends and vertically loaded, shows different ‘arch mechanisms’ depending on block height-to-width ratio.
Highlights
Masonry is one of the more common structural materials in ordinary and monumental buildings inItaly and Europe, since it has been adopted for centuries up to present days
Analytical and numerical modelling of such a material represents a research field that is continuously characterized by the proposition of new more or less detailed models, given that the assessment of masonry structural behaviour is fundamental for ensuring building safety condition and for restoration purposes
This work is dedicated to the analysis of small/medium scale masonry specimens, subject to in-plane loads and nonlinear analyses are carried on by adopting models able to account for material heterogeneity
Summary
Masonry is one of the more common structural materials in ordinary and monumental buildings inItaly and Europe, since it has been adopted for centuries up to present days. Masonry is one of the more common structural materials in ordinary and monumental buildings in. Masonry is a composite or heterogeneous structural material obtained by assembling natural or artificial blocks by means of mortar layers or dry joints. Analytical and numerical modelling of such a material represents a research field that is continuously characterized by the proposition of new more or less detailed models, given that the assessment of masonry structural behaviour is fundamental for ensuring building safety condition and for restoration purposes. A wide set of analytical and numerical models may be adopted for studying masonry material. This work is dedicated to the analysis of small/medium scale masonry specimens, subject to in-plane loads and nonlinear analyses are carried on by adopting models able to account for material heterogeneity
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