Lattice Discrete Particle Model for the Simulation of Irregular Stone Masonry
Publication: Journal of Structural Engineering
Volume 147, Issue 9
Abstract
This paper focuses on the simulation of irregular stone masonry by the lattice discrete particle model (LDPM), which simulates the fracture and failure behavior of quasi-brittle heterogeneous materials by modeling the interaction among coarse material heterogeneities. LDPM is formulated at the length scale of the masonry stones whose interaction is described through constitutive equations featuring softening in tension and strain hardening in compression. The numerical results relevant to diagonal compression tests show that the intrinsic stochastic character of LDPM can quantify the variation of the mechanical properties of irregular masonry resulting from random stone size and stone-size distribution. Furthermore, the paper presents an analysis of the size effect on irregular stone masonry structures. This was obtained by simulating the shear behavior of geometrically similar samples of different sizes. The simulations demonstrate that increasing structural size leads to a significant reduction of both structural strength and structural ductility. The magnitude of the predicted size effect suggests that, contrary to typical experimental results on reduced size samples, real irregular masonry structures must be considered as perfectly brittle.
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Data Availability Statement
All data, models, and code generated or used during the study appear in the published article.
Acknowledgments
The work of the first and third authors was sponsored by the University of L’Aquila.
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Journal of Structural Engineering
Volume 147 • Issue 9 • September 2021
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© 2021 American Society of Civil Engineers.
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Received: May 20, 2020
Accepted: Apr 7, 2021
Published online: Jun 23, 2021
Published in print: Sep 1, 2021
Discussion open until: Nov 23, 2021
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