On the compressive strength prediction for concrete masonry prisms

Barbosa, C. S.; Lourenço, Paulo B.; Hanai, João Bento de

doi:10.1617/s11527-009-9492-0

Cited by 82 publications

(40 citation statements)

References 8 publications

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“…Similar observations have been made using nonlinear models in order to comment on the effects of model geometry on the predicted compressive strength of masonry, Berto et al [9], Barbosa et al [10]. Finally, the general deficiencies of plane models in accurately reproducing the behavior of single-and multi-leaf walls in numerical analyses have also been noted by Milani et al [11,12].…”

Section: Introductionsupporting

confidence: 55%

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Numerical prediction of the behavior, strength and elasticity of masonry in compression

Drougkas

Roca

Molins

2015

Engineering Structures

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The paper focuses on the numerical prediction of the compressive response of masonry by means of detailed micro-modelling techniques. In such a model, the material constituents (mortar and units) and the unit-mortar interfaces are separately described by means of specific constitutive equations.The available modeling choices are evaluated through a literature review of related case studies. A systematic approach is proposed and is corroborated by the numerical simulation of a large number of experimental cases from various sources. A total of fifty experimental results are simulated resulting in an overall good prediction of the compressive strength and elastic modulus of the masonry composite, as well as a realistic depiction of the failure mode.This study focuses on the numerical prediction of the compressive strength of masonry, extending to issues pertaining to global stiffness, failure mode, hardening and softening behavior of masonry and their numerical simulation. The masonry typology considered consists of solid units, primarily brick, and mortar of mostly lower strength and higher deformability. Highlights• The behavior of masonry in compression is investigated using micro-models• A combined smeared cracking-plasticity law is used for the units and mortar• A total of fifty experimental compression tests are simulated• Compressive strength and Young's modulus of masonry is well approximated• Remarks on the behavior and failure mode of masonry in compression are made

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Section: Introductionsupporting

confidence: 55%

“…A body of work involving detailed modeling of masonry under in-plane loads, in which units and mortar are modeled separately, has been produced [8][9][10]. In these cases, the unit-mortar interaction results in out-off-plane stresses which may significantly alter the compressive behavior of the masonry composite.…”

Section: Modeling Geometrymentioning

confidence: 99%

Numerical prediction of the behavior, strength and elasticity of masonry in compression

Drougkas

Roca

Molins

2015

Engineering Structures

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“…The aim of this study is to obtain a model able to simulate numerically the prism compression tests, through a constitutive model using the theory of plasticity. The numerical simulations were carried out using a commercial non-linear finite element program (Diana [19]), which provided good results in analyzing this type of masonry under compression [20]. More complex models involving some kind of mesoscale seem necessary for other masonry types [21,22].…”

Section: Simulation Of Non Linear Behavior Of Prismsmentioning

confidence: 99%

Study of the compressive strength of concrete block prisms: stack and running bond

Mohamad

Lourenço

Roman

2011

Rev. IBRACON Estrut. Mater.

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The main goal of this work is to investigate the nonlinear behavior of concrete block masonry prisms under compression, with an emphasis in the prism deformability and the failure modes. A total of 18 stack-bonded prisms have been tested, using hollow blocks of a single geometry and two different mortar types. To investigate the effect of vertical joints, the bond pattern -stack and running bond -in the prism was varied, by using half units. Finite element analysis of hollow masonry prisms was done utilizing a commercial non-linear finite element code DIANA. The numerical simulation were carried out using non-linear two dimensional 8-node elements and the biaxial stress state material was modeled by a combination of the yield conditions of Rankine and Drucker-Prager. The numerical and experimental results were compared to validate the ability to predict deformation and peak load. The results show that an analytical model cannot be formulated without understanding the interaction between block and mortar. It was observed that: the non-linearities of the masonry correspond to an increase in the lateral strain due to extensive cracking of the material and a progressive increase in the ratio between lateral and axial strains.; the cracks in the three block stacked prisms constructed with a stronger mortar were vertical on both sides; the prisms constructed with a weaker mortar had, as a consequence of localized crushing, also vertical cracks due to stress concentration at some points; the presence of a vertical joint in the prism led to the appearance of separation cracks between the middle block and the vertical mortar joint.Keywords: concrete blocks, structural masonry, failure mode, compression behavior.O principal objetivo deste trabalho é investigar o comportamento não linear de prismas de blocos de concreto a compressão, com ênfase na deformabilidade e modo de ruptura. Um total de dezoito (18) prismas com blocos sobrepostos foram testados, usando blocos vazados com uma única geometria e dois traços de argamassa. Para investigar o efeito da junta vertical utilizaram-se dois meios blocos na junta intermediária dos prismas. Utilizou-se o programa comercial DIANA para simular em elementos finitos o comportamento da alvenaria estrutural. As simulações numéricas foram realizadas usando um elemento bidimensional de oito (8) nós e o estado biaxial de tensões do material foi modelado pela combinação das condições de Rankine e Drucker-Prager. Foram comparados os resultados numéricos e experimentais para validar a capacidade de prever as deformações e a carga última do conjunto. Pode se perceber pelos resultados que um modelo analítico não pode ser formulado sem um entendimento das interações entre o bloco e argamassa. Foi observado que a não linearidade da alvenaria correspondeu a um aumento nas deformações laterais devido à extensiva fissuração do material e a um progressivo aumento nas proporções entre a deformação lateral e axial; as fissuras nos prismas de três blocos construídas com argamassa forte foram verticais ...

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“…Due to their light weight, ease of use and reasonable [12][13][14] leaded to acceptable estimation of failure compressive performance, hollow concrete blocks are mechanisms of hollow masonry. Lu et al [15] have used widely used in masonry structures.…”

Section: Introductionmentioning

confidence: 99%

Shape Optimization of Hollow Concrete Blocks Using the Lattice Discrete Particle Model

Javidan¹,

Safarnejad²,

Shahbeyk³

2013

IJEE

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Hollow concrete blocks are one of the widely used building elements of masonry structures in which they are normally loaded under combined action of shear and compression. Accordingly and due to their structural importance, the present study intends to numerically search for an optimum shape of such blocks. The optimality index is selected to be the ratio of block's failure strength to its weight, a non-dimensional parameter, which needs to be maximized. The nonlinear analysis has been done using a homemade code written based on the recently developed Lattice Discrete Particle Model (LDPM) for the meso-scale simulation of concrete. This numerical approach accounts for the different aspects of concrete's complex behavior such as tensile fracturing, cohesive and frictional shearing and also its nonlinear compressive response. The model parameters were calibrated against previously reported experimental data. Various two-core configurations for the hollow blocks are examined, compared and discussed.

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On the compressive strength prediction for concrete masonry prisms

Cited by 82 publications

References 8 publications

Numerical prediction of the behavior, strength and elasticity of masonry in compression

Numerical prediction of the behavior, strength and elasticity of masonry in compression

Study of the compressive strength of concrete block prisms: stack and running bond

Shape Optimization of Hollow Concrete Blocks Using the Lattice Discrete Particle Model

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