DEM &amp; FEM/DEM MODELS FOR LATERALLY LOADED MASONRY WALLS

Baraldi, Daniele; Reccia, Emanuele; Cecchi, Antonella

doi:10.7712/120115.3528.715

Cited by 8 publications

(9 citation statements)

References 17 publications

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“…These models, initially developed in the field of geo-mechanics, can properly represent the behavior of historical masonry, which could be considered as made of dry stone blocks exhibiting a periodic pattern. FEM/DEM allows to further extend the study to both linear and nonlinear masonry behavior, it has been successfully adopted to study the behavior of historical masonry construction [17][18][19]30,31,38].…”

Section: Discrete Model With Rigid Elementsmentioning

confidence: 99%

“…The rigid DEM introduced previously has been already compared and calibrated with a FEM/DEM code in elasticity [30]. Moreover in a recent contribution, authors have initially compared the two models also accounting for material nonlinearity [31]. In this contribution, rigid DEM and FEM/DEM already considered by authors are deeply calibrated and compared in the field of material nonlinearity by performing a wide set of pushover analyses of masonry panels having dry joints.…”

Section: Introductionmentioning

confidence: 99%

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In plane loaded masonry walls: DEM and FEM/DEM models. A critical review

2017

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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

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Section: Discrete Model With Rigid Elementsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

In plane loaded masonry walls: DEM and FEM/DEM models. A critical review

2017

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“…In order to validate the proposed model, LA results in terms of collapse load and mechanism are compared to the results of a second model obtained with the models adopted in [7,8], here considered as a benchmark. In the referred works, two micro-mechanical models have been proposed for the the in-plane failure analysis of masonry walls: a discrete element method (DEM) and a combined finite/discrete element method (FEM/DEM).…”

Section: Dem and Fem/demmentioning

confidence: 99%

“…In this work the attention is mainly focused on the category of micro-models particularly focusing on Limit Analysis, which represents a very effective tool to estimate the collapse load and collapse mechanism for masonry structures [5,31,11]. A validation of the proposed model is provided, via suitable comparisons with the results provided in [7,8], here regarded as a benchmark, where two micro-mechanical models that finely describe the microstructure, based on the discrete element method (DEM) and on a combined finite/discrete element method (FEM/DEM), have been adopted to the evaluation of the failure in-plane behaviour of masonry panels with several hight-to-width ratio and different arrangements of blocks. The comparison of the numerical results has shown the efficacy of the limit analysis for the in-plane failure analysis of masonry walls.…”

Section: Introductionmentioning

confidence: 99%

Micromodels for the In-Plane Failure Analysis of Masonry Walls with Friction: Limit Analysis and DEM-FEM/DEM Approaches

Pepe

Pingaro

Reccia

et al. 2020

Lecture Notes in Mechanical Engineering

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Despite its complexity, the accurate structural modelling of masonry still represents an active field of research, due to several practical applications in civil engineering, with special reference to the preservation and restoration of cultural heritage. In this work a comparison of different models and techniques for the assessment of the mechanical behaviour of two-dimensional block masonry walls subjected to the static action of in-plane loads is presented. Panels are characterized by different height-to-width ratio as well as various masonry textures. Brick-block masonry, perceived as a jointed assembly of prismatic particles in dry contact, is modelled as a discrete system of rigid blocks interacting through contact surfaces unable to carry tension and resistant to sliding by friction, modelled as zero thickness elasto-plastic Mohr-Coulomb interfaces. Different approaches and numerical models are considered: Limit Analysis (LA), Discrete Element Model (DEM) and Finite Elements/Discrete Element Model (FEM/DEM). Limit Analysis is able to provide fast and reliable results in term of collapse multiplier and relative kinematism. Here a standard Limit Analysis is adopted via an own made procedure based on Linear Mathematical Programming, taking into account friction at interfaces.

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“…FE-DE Y2D code has been recently updated by the Geo Group of the Toronto University [16,17]. In the last years, FE-DE method has been successfully adopted to study the behavior of historical masonry structures [18,19,20,21].…”

Section: Fe-de Modelling For Masonry Arch Bridgesmentioning

confidence: 99%

A Finite Element-Discrete Element Approach for the Analysis of the Venice Trans-Lagoon Railway Bridge

Reccia¹,

Cecchi²,

Milani³

Proceedings of the Third International Conference on Railway Technology: Research, Development and Maintenance

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In this paper, the feasibility of the utilization of a combined finite element/discrete element (FE-DE) approach to investigate the behavior of masonry arch bridges is proposed. Attention is paid to the assessment of the load carrying capacity by means of a suitable coupled FE-DE two-dimensional approach. This paper outlines the fields and limits of applicability of the FE-DE method to the study of masonry arch bridges. The main contribution is to evaluate the applicability of FE-DE, in particular its reliability to describe the nonlinear behavior of masonry arch bridges under increasing static loads, to catch kinematic failure mechanisms and collapse load multipliers, as well as to evaluate the role played by the backfill.A discussion on a possible approach to FE-DE modelling of the Venice transLagoon masonry arch bridge is proposed. With such a purpose, a series of parametric analyses has been conducted in order to evaluate the influence of the different parameters involved on the behavior of the bridges. Pushover analyses have been performed to investigate the nonlinear behavior up to the collapse and up to a clear formation of a failure mechanism in the model.

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DEM & FEM/DEM MODELS FOR LATERALLY LOADED MASONRY WALLS

Abstract: Abstract. The wide amount of historic masonry constructions in

Cited by 8 publications

References 17 publications

In plane loaded masonry walls: DEM and FEM/DEM models. A critical review

In plane loaded masonry walls: DEM and FEM/DEM models. A critical review

Micromodels for the In-Plane Failure Analysis of Masonry Walls with Friction: Limit Analysis and DEM-FEM/DEM Approaches

A Finite Element-Discrete Element Approach for the Analysis of the Venice Trans-Lagoon Railway Bridge

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