A Discrete Macro-Element Method (DMEM) for the nonlinear structural assessment of masonry arches

Cannizzaro, Francesco; Pantò, Bartolomeo; Caddemi, S.; Caliò, Ivo

doi:10.1016/j.engstruct.2018.04.006

Cited by 69 publications

(34 citation statements)

References 34 publications

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“…Elastic, linear softening constitutive laws with different strength and displacement capacity in tension and compression simulate the masonry flexural behavior while, diagonal Links are calibrated according to the Mohr Coulomb criterion. A detailed description of the DMEM and its calibration strategies can be found in [8] [9] and [17] [19]. The DMEM has been employed to simulate the seismic behavior of monumental masonry constructions by means of non-linear static (push-over) analyses [20] [21].…”

Section: The Adopted Discrete Macro-element Methodsmentioning

confidence: 99%

Out-of-Plane Seismic Response of Masonry Façades Using Discrete Macro-Element and Rigid Block Models

Giresini¹,

Pantò²,

Caddemi³

et al. 2019

Proceedings of the 7th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COM

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This paper investigates the out-of-plane response of masonry façades under earthquakes by means of two different approaches. A discrete macro-element approach, based on modelling the structure by means of spatial deformable macro-elements interacting through nonlinear zero-thickness interfaces, and the classical approach in which the masonry façade is assumed as a rigid block subjected to earthquake loading. The latter method neglects the elasticity of the masonry element and contemplates the energy dissipation only at each impact by means of a coefficient of restitution. The results of dynamic non-linear analyses, performed with the two methods on a real case of a church façade, provide a first comparison between the two approaches highlighting some limits of application of the simplified rigid block model.

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Section: The Adopted Discrete Macro-element Methodsmentioning

confidence: 99%

Out-of-Plane Seismic Response of Masonry Façades Using Discrete Macro-Element and Rigid Block Models

Giresini¹,

Pantò²,

Caddemi³

et al. 2019

Proceedings of the 7th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COM

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“…(5), the ultimate torsion strength corresponding to the DMEM model is reported. This result has been obtained in [24] considering the ultimate force of each link equal to half of the global shear strength ( 0 ) of the interface. In Figure 2c, the ultimate torsion moment of the proposed model and the DMEM model are reported, both are divided by the ultimate shear strength of the interface.…”

Section: Proposed Model Vs the Dmem Modelmentioning

confidence: 99%

“…According to such an approach, masonry walls are discretized into shear deformable macroportions, which interact with each other by discrete interfaces governing the flexural and torsion masonry behaviour as well as the sliding along the mortar joints [5][23] [24]. In addition, the DMEM can be employed as a distinct model, considering a refined mesh coherent with the effective masonry arrangement and calibrating the interfaces in order to concentrate the stiffness of bricks and mortar joints [25] [26].…”

Section: Introductionmentioning

confidence: 99%

A New 3d-Adaptive Discrete Interface for Modeling the Torsion Behavior of Masonry Contact Joints

Casapulla¹,

Pantò²,

Caliò³

2019

Proceedings of the 7th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COM

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The numerical modelling of the torsion behaviour of masonry block joints represents a key aspect for the assessment of the out-of-plane response of masonry walls. However, it represents a challenging computational issue due to the high non-linear coupling between the torsion and other internal forces (shear, bending moment and axial load), meaning the necessity to use complex 3D non-linear constitutive laws. The limit analysis-based approaches represent efficient and reliable numerical tools to predict the ultimate torsion load including the interaction with shear and bending moment. Within this framework, few researchers have proposed and experimentally validated continuous and discrete contact models, able to predict the ultimate strength of masonry contact joints. These models are successfully employed to develop highdetailed simulations of 3D dry-jointed masonry block structures subjected to lateral in-plane and out-of-plane actions. Nonetheless, the limit analysis is not able to characterize the nonlinear response of masonry walls prior to collapse and to predict the evolution of plastic damage and the ductility resources, if available. Aiming at overcoming such a limit, this paper introduces a new 3D adaptive discrete interface, able to simulate the non-linear torsion-shear behaviour of masonry joints. The interface consists of four springs whose orientation is updated during the analysis, following an incremental iterative Newton-Raphson algorithm taking into account the current position of the torsion centre of the interface. The ultimate torsion-shear capacity domain obtained by the proposed model is compared with limit-analysis predictions and experimental data available in the literature. The results highlight the ability of the new interface to effectively reproduce the non-linear behaviour and the ultimate strength of joints subjected to different loading combinations.

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“…Besides, an implicit discrete element method was used to analyze the mechanical behavior of a standard arch bridge and a masonry stone bridge [14]. In some cases, to predict the nonlinear structural behavior of masonry arches, a new discrete macro-element method was applied [15]. A novel approach was proposed for studying masonry arch bridges using inverse analysis procedures [16,17].…”

Section: Introductionmentioning

confidence: 99%

Study on the Restoration of a Masonry Arch Viaduct: Numerical Analysis and Lab Tests

et al. 2020

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This article presents an analysis of the load-carrying capacity of a historic masonry arch viaduct. The vault was made of bricks and lime-cement mortar. It was built in 1886 and, therefore, its historical character had to be included in the restoration project. The main task of the restoration was to bring the viaduct to a technical condition corresponding to the current requirements to allow normal (or limited) service. The strength of the brickwork and joints (mortar) was examined experimentally in the laboratory and on the viaduct. This paper presents numerical calculations for the masonry viaduct that were performed using two programs based on the finite element method. As the project documentation was unknown, two-and three-hinged models of the masonry arch were analyzed. The axial forces, shear forces, bending moments, displacement, normal stresses, and shear stresses generated from the numerical analysis have been discussed. The conditions of the load capacity of the arch viaduct due to compression and shearing have been met. The safety of a masonry arch of the viaduct was determined. Finally, the restoration scope of the masonry viaduct was proposed.

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A Discrete Macro-Element Method (DMEM) for the nonlinear structural assessment of masonry arches

Cited by 69 publications

References 34 publications

Out-of-Plane Seismic Response of Masonry Façades Using Discrete Macro-Element and Rigid Block Models

Out-of-Plane Seismic Response of Masonry Façades Using Discrete Macro-Element and Rigid Block Models

A New 3d-Adaptive Discrete Interface for Modeling the Torsion Behavior of Masonry Contact Joints

Study on the Restoration of a Masonry Arch Viaduct: Numerical Analysis and Lab Tests

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