An efficient solution procedure for crushing failure in 3D limit analysis of masonry block structures with non-associative frictional joints

Portioli, Francesco; Casapulla, Claudia; Cascini, Leonardo

doi:10.1016/j.ijsolstr.2015.05.025

Cited by 40 publications

(12 citation statements)

References 27 publications

(50 reference statements)

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“…A finite element analysis was implemented in Abaqus in order to make a comparison with the rigid block limit analysis outcomes in terms of failure modes and load factor promoting collapse. The comparison showed the computational ability of the novel software LiABlock_3D in predicting the failure mechanism and highlighted the importance of a finite compressive strength for a reliable prediction of collapse load factors by limit equilibrium analysis [9,10]. of the 3D model.…”

Section: Discussionmentioning

confidence: 95%

Application of Liablock_3d to the Analysis of Failure Modes in Masonry Structures Subjected to Seismic Action

Gagliardo¹,

Terracciano²,

Cascini³

et al. 2019

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

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The paper deals with the application of LiABlock_3D, a novel software tool developed at the University of Naples Federico II, to the case study of an historic masonry viaduct listed by UNESCO as World Heritage Site. LiABlock_3D analyses masonry structures under seismic lateral loads and automatically predict the potential failure modes of complex assemblages in terms of local and global collapse mechanisms. The numerical formulation is based on limit equilibrium analysis and mathematical programming is used to solve the contact problem. Masonry structures are represented as a collection of three-dimensional rigid blocks. Once the geometry of the construction has been generated (i.e. using different CAD tools or MATLAB® scripts for parametric analysis), the numerical model requires few parameters as input data, such as the unit weight of materials and the friction coefficient. Several loading conditions can be considered, assuming different loading axis and load distribution (uniform and/or concentrated loads can be applied). With respect to failure condition, LiABlock_3D considers no-tension, frictional contact interfaces with infinite compressive strength. Opening and sliding failure conditions are considered. In order to show the potentialities and limitations of the developed software, a comparison of the outputs provided by LiABlock_3D with those obtained by Finite Element Analysis is presented and discussed as well.

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Section: Discussionmentioning

confidence: 95%

Application of Liablock_3d to the Analysis of Failure Modes in Masonry Structures Subjected to Seismic Action

Gagliardo¹,

Terracciano²,

Cascini³

et al. 2019

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

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“…In its most elementary formulation using discrete elements, the problem can be considered as one of unilateral contact between rigid blocks (Fishwick, 1996;Ferris and Tin-Loi, 2001). More recent research (Orduña and Lourenço, 2005) and (Portioli et al, 2015) agree with the method proposed in the fundamental aspects of the formulation of the problem, but do not coincide in the approach to its resolution, the most important difference being that not a single solution but a multiple solution approach is sought. This paper proposes that this multiplicity of solutions is not only a characteristic of the mathematical formulation but also a physical fact that is corroborated by the load tests designed for this purpose.…”

Section: Methods and Backgroundmentioning

confidence: 92%

Approaches to strongly local phenomena in dry masonry structures

Layos

Muñoz

2018

IJMRI

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Sliding collapse tests performed on dry-stack masonry structures show a statistical dispersion in the results that cannot be explained by the dispersion in the properties of its constituent materials, but may correspond to an uneven distribution of stresses at the contact surfaces or within the constituent elements. In order to study these local phenomena, a method of numerical analysis of rigid blocks in unilateral contact is implemented and confronted with two types of benchmark tests: load tests and photoelastic tests. Comparing the results will allow stating that the random irregularities in contact surfaces play an important role in local behaviour. The results are very encouraging and suggest that this type of approach, common in the field of granular media but not in orthotropic media, can provide interesting insights for the analysis of local phenomena in historical masonry structures.

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“…This aspect is particularly interesting for structures reinforced with metallic ties where a concentration of stress could arise. According to several literature contributes [52] a procedure that iteratively modifies the yield surface, by adding a series of new constraints that consider the limited compressive strength of joints, could be introduced. Another further development, that has been recently implemented in the code, is the introduction of contact surfaces with cohesion in the formulation.…”

Section: Discussionmentioning

confidence: 99%

Micromodels for the in-plane failure analysis of masonry walls: Limit Analysis, FEM and FEM/DEM approaches

Pepe

Pingaro

Trovalusci

et al. 2019

Frattura Ed Integrità Strutturale

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In the last decades the modeling of masonry structures has become an argument particularly appealing for many researchers and a large variety of numerical techniques have been formulated with the aim to produce practical applications in civil engineering, with special reference to the preservation and restoration of cultural heritage. Nevertheless, the question appears today still far from being resolved in a general way. The characteristics of fragility, heterogeneity and anisotropy of masonry, as well as the extreme variety of the building/construction rules strongly compromise the possibility of a unified description of its mechanical behavior. In this work a comparison of different models and techniques for the assessment of the mechanical behavior of two-dimensional block masonry walls subjected to the static action of in-plane loads is presented. Different approaches and numerical models are considered: a Limit Analysis approach (LA), a FEM/DEM procedure and a non-linear heterogeneous Finite Element analysis (FE). Here a standard Limit Analysis is adopted via a homemade procedure based on Linear Mathematical Programming, considering friction at interfaces. Analyses are performed referring to benchmark examples from literature.

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An efficient solution procedure for crushing failure in 3D limit analysis of masonry block structures with non-associative frictional joints

Cited by 40 publications

References 27 publications

Application of Liablock_3d to the Analysis of Failure Modes in Masonry Structures Subjected to Seismic Action

Application of Liablock_3d to the Analysis of Failure Modes in Masonry Structures Subjected to Seismic Action

Approaches to strongly local phenomena in dry masonry structures

Micromodels for the in-plane failure analysis of masonry walls: Limit Analysis, FEM and FEM/DEM approaches

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