Computational modeling of the out-of-plane behavior of unreinforced irregular masonry

Mercuri, Micaela; Pathirage, Madura; Gregori, Amedeo; Cusatis, Gianluca

doi:10.1016/j.engstruct.2020.111181

Cited by 43 publications

(14 citation statements)

References 85 publications

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“…It has been adopted to simulate the mechanical behavior of concrete [59,62], mortar [63,64], fiber reinforced concrete [65,66], or to reproduce multi-physics phenomena such as hygro-thermo-chemical processes, alkali-silica reaction, and aging [63,67,68]. This lattice discrete model was also used to simulate the mechanical behavior of reinforced and unreinforced stone masonry [60,61].…”

Section: The Lattice Discrete Particle Modelmentioning

confidence: 99%

“…This model was originally conceived to simulate the behavior of concrete and other granular materials at the meso-scale level by modeling the interaction between coarse aggregate pieces. It was recently applied successfully for the modeling of stone masonry structures [60,61]. LDPM is able to simulate accurately the fracturing behavior from crack trigger to localization, propagation, and to global failure, by taking into account the material heterogeneity.…”

Section: Introductionmentioning

confidence: 99%

“…For a thorough investigation of the topic presented in this paper, the reader is referred to recent work of Mercuri and coworkers [61].…”

Section: Introductionmentioning

confidence: 99%

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Lattice Discrete Modeling of Out-of-Plane Behavior of Irregular Masonry

Mercuri¹,

Pathirage²,

Gregori³

et al. 2021

Proceedings of the 8th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COM

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Stone masonry buildings are known to be highly vulnerable to seismic actions. In this context, the analysis of the out-of-plane response of unreinforced masonry structures is crucial. For this purpose, the Lattice Discrete Particle Model (LDPM) was employed to simulate the mechanical behavior of stone masonries up to their failure. Unlike commonly used continuum-based methods or simplified analytical models, that are often limited in modeling correctly complex failure mechanisms, LDPM is able to capture accurately crack distributions and failure patterns. LDPM describes the masonry at the scale of stones and takes into account their interactions through tailored constitutive equations for tensile, compressive, shear, and frictional behaviors. First, LDPM was validated against experimental results on masonry panels subjected to out-of-plane loading. Next, the vertical bending mechanism was studied in the cases of one-and two-story walls with and without openings. Finally, more complex mechanisms were considered where the damage evolution and the fracture propagation were analyzed for a set of panels assumed to be placed within the continuity of a facade. The overall results presented in this paper show that LDPM can realistically predict the collapse mechanisms associated with out-of-plane loading for different structural configurations and geometries.

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Section: The Lattice Discrete Particle Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Lattice Discrete Modeling of Out-of-Plane Behavior of Irregular Masonry

Mercuri¹,

Pathirage²,

Gregori³

et al. 2021

Proceedings of the 8th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COM

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“…Kashmir 2005, L'Aquila 2009, Christchurch 2011, Emilia 2012, Amatrice 2016). Under earthquake excitation, masonry structures are subjected to multi-directional ground motions, which causes in-plane and out-of-plane loads and eventually provokes their collapse [1][2][3][4][5][6][7][8]. In the last decade, there has been a growing demand in protecting masonry heritages because of decades of studies and investments in this field as well as the necessity to maintain and to pass them to future generations.…”

Section: Introductionmentioning

confidence: 99%

Natural-Fibrous Lime-Based Mortar for the Rapid Retrofitting of Masonry Heritage

Vailati¹,

Mercuri²,

Angiolilli³

et al. 2021

Preprint

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The present work aims to characterize the mechanical behavior of a new composite material for the conservation and development of the vast historical and architectural heritage that is particularly vulnerable to environmental and seismic actions. The new composite consists of natural hydraulic lime (NHL) -based mortar, reinforced by sisal short fibers randomly oriented in the mortar matrix. The NHL-based mortar ensures the chemical-physical compatibility with the original feature of the historical masonry structures (mostly in stone and clay) aiming to pursue both the effectiveness and durability of the intervention. The use of vegetable fibers (i.e. the sisal one) is an exciting challenge for the construction industry since they require a lower degree of industrialization for their processing, and therefore, their costs are also low, as compared to the most common synthetic/metal fibers. Beams of sisal-composite sizing 160x40x40 mm3 with a central notch are tested in three-point bending, aiming to evaluate both their bending strength and fracture energy. Also, tensile tests and compressive tests were performed on the composite samples, while water retention test and slump test were performed on the fresh mix. Finally, the tensile tests on the Sisal strand were carried out to evaluate the tensile strength of both strand and wire. A final comparison with unreinforced mortar specimens shows that the proposed composite ensures great workability and good performances in term of ductility and strength and it can be considered a promising alternative to the classic fiber-reinforcing systems.

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“…Originally developed for concrete, this model was successfully used to simulate the behavior of plain concrete, 15,56–60 reinforced concrete, 61,62 fiber reinforced concrete, 63–67 and to reproduce multi‐physics phenomena such as aging, ASR, 68–72 as well as hygro‐thermal and chemical processes 73–76 . LDPM has also been used to simulate rocks 77,78 and masonry 79,80 …”

Section: Introductionmentioning

confidence: 99%

Symmetric high order microplane model for damage localization and size effect in quasi‐brittle materials

Lale

Cusatis

2021

Num Anal Meth Geomechanics

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This paper presents the so‐called symmetric high‐order microplane (SYHOM) model for the simulation of damage localization and size effect in quasi‐brittle materials. Contrarily to its predecessor, the high order microplane (HOM) model, SYHOM is formulated without rotational degrees of freedom, does not require couple stresses, and solves stability issues created by the antisymmetric components of stress and high order stress tensors. Furthermore, the formulation features variable, damage‐dependent localization limiter and nonlocal characteristic length that allows reproducing correctly size and shape of the fracture process zone during the entire softening process: from crack initiation to the formation of a stress‐free fracture. The paper highlights the implementation of SYHOM via isogeometric analysis with quadratic shape functions and presents several numerical simulations to demonstrate SYHOM's ability to simulate damage evolution during softening. Finally, SYHOM is validated by simulating experimental data relevant to the size effect on structural strength of notched concrete samples.

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Computational modeling of the out-of-plane behavior of unreinforced irregular masonry

Cited by 43 publications

References 85 publications

Lattice Discrete Modeling of Out-of-Plane Behavior of Irregular Masonry

Lattice Discrete Modeling of Out-of-Plane Behavior of Irregular Masonry

Natural-Fibrous Lime-Based Mortar for the Rapid Retrofitting of Masonry Heritage

Symmetric high order microplane model for damage localization and size effect in quasi‐brittle materials

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