Analytical Modeling of Masonry-Infilled RC Frames Retrofitted with Textile-Reinforced Mortar

Koutas, Lampros N.; Triantafillou, Thanasis; Bousias, Stathis

doi:10.1061/(asce)cc.1943-5614.0000553

Cited by 51 publications

(28 citation statements)

References 37 publications

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“…In this part of the paper some details of the experimental case study regarding the masonry-infilled RC frame with the strengthening material TRM are presented for the benefit of the reader. Full details about the experimental case study can be found in Koutas et al [32] [33].…”

Section: Description Of Experimental Case Studymentioning

confidence: 99%

“…(a) (b) Figure 3 : (a) Test set up [33] and (b) Imposed cyclic deformation history for all stories [33].…”

Section: Experimental Campaignmentioning

confidence: 99%

“…TRM jacketing is an extremely promising solution for the strengthening of unreinforced infill walls subjected to either out-of-plane or in-plane loading [5]. In recent experimental and numerical studies provided by Koutas et al [32,33] the use of TRM for strengthening masonryinfilled frames was studied. The study showed that in the retrofitted specimen an approximately 56% increase in the lateral strength, accompanied with a 52% higher deformation capacity at the top of the structure at ultimate strength state was achieved compared to the unretrofitted one.…”

Section: Introductionmentioning

confidence: 99%

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Numerical Modeling of Masonry-Infilled Rc Frame Strengthened With TRM

Filippou¹,

Chrysostomou²,

Kyriakides³

2019

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

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The behaviour of masonry-infilled reinforced concrete (RC) frame structures during an earthquake has attracted the attention by structural engineers since the 1950's. During the last decade, the use of textile reinforced mortar (TRM) as strengthening material for masonryinfilled RC frames under in-plane lateral loadings has been studied. This paper presents a numerical model of the behaviour of existing masonry-infilled RC frame strengthened with TRM that was studied experimentally at the University of Patras. It was a 2:3 scale three-story structure with non-seismic design and detailing, subjected to inplane cyclic loading through displacement control analysis. The objective of the present study is to identify suitable numerical constitutive models for each component of the structural system, in order to create a numerical tool to model the TRM strengthened-masonry infilled RC frames in-plane behaviour. A 2D TRM strengthened-masonry-infilled RC frame was developed in DIANA finite element analysis (FEA) software and an eigenvalue and nonlinear structural cyclic analysis were performed. There is good agreement between the numerical model and experimental results. It has been found that the numerical model has the capability to predict the initial stiffness, the ultimate stiffness, the maximum shear-force capacity, cracking patters and the possible failure mode of masonry-infilled RC frame with retrofitting. This model proves to be a reliable model of the behaviour of TRM strengthened-masonry-infilled RC frame under cyclic loading and can be used for further parametric studies.

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Section: Description Of Experimental Case Studymentioning

confidence: 99%

“…(a) (b) Figure 3 : (a) Test set up [33] and (b) Imposed cyclic deformation history for all stories [33].…”

Section: Experimental Campaignmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Numerical Modeling of Masonry-Infilled Rc Frame Strengthened With TRM

Filippou¹,

Chrysostomou²,

Kyriakides³

2019

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

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“…[7][8][9][10][11][12][13] has allowed a qualitative leap in the field. In this case, simple FEM models will be developed in order to create a model to be use it in large structural models of complete constructions.…”

Section: Introductionmentioning

confidence: 99%

TRM reinforcement of masonry specimens for seismic areas

Ivorra¹,

Bru²,

Mendoza-Galván³

et al. 2017

Int. J. SAFE

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This document analyses the resistant behaviour to diagonal compression and direct compression of brick masonry specimens, reinforced with textile reinforced mortars (TRM) and without them. The numerical models have been calibrated with experimental results in order to have a suitable technique to reinforce masonry historic constructions where extraordinary tension stresses could occur in seismic situations. For the numerical modelling, FEM models have been developed using non-linear layered bi-dimensional shell elements. Moreover, a comparative analysis has been developed between the numerical models and the experimental ones. There are two different types of reinforced specimens: two layers to reinforce both surfaces (i), and one layer for only one surface (ii). The point of this (ii) is to respect the Italian legislation indications for the protection of historic constructions. Keywords: reinforced masonry TRM walls FEM INTRODUCTIONMany residential areas in the historical centres of European Seismic areas have a very high vulnerability due to of their structural system based in masonry or brick masonry walls. These structures have a very low capacity to resist tension or shear stresses. The use of textile reinforced mortar (TRM) as a reinforcing element can provide an additional capacity to solve these structural problems. Mortar cementitious materials as matrix of these reinforcement systems are more compatible with masonry than other polymeric matrices where its use in historical constructions is not permitted by the authorities in charge of protecting these constructions.Brick masonry walls are building systems made up of brick elements joined by mortar with a specific disposition. Due to its configuration, with elements of different properties, their simulation by finite element method becomes a complicated task. Brick and mortar have different strength capacities, and the very different strength behaviour in tension and in compression generates an anisotropic behaviour. Another important factor is the influence of the elastic modulus of both materials. By having different elastic modulus, their strain, for a given stress, will be different and the compatibility equations should solve this interaction. For these reasons, the ultimate load behaviour of brick masonry specimens are very dependent on the direction of the applied load and the plane on which the loads act.Some studies, such as those carried out at the Polytechnic University of Catalonia [1], analyse the out-of-plane behaviour, although the present paper will only focus on the loads acting on the plane of the wall. Masonry structures are especially weak against lateral cyclic loads such as those caused by earthquakes and this work analyses them. The difference of elastic modulus and the differences between the maximum stresses in tension and compression for brick and mortar are the cause of the specimen fault in the weakest areas of the wall. It is necessary to understand that the weakest areas will be the joints between the bricks: the m...

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“…For example, in an attempt to avoid problems associated with the use of epoxy resins, an innovative composite material, known as Textile Reinforced Mortar (TRM), was developed (Papanicolaou et al, 2008). TRM has been used over the last decade for seismic retrofitting of structures, particularly concrete and masonry structures (Bousias et al, 2007;Koutas et al, 2014;Koutas et al, 2015;Tetta et al, 2015). While studies have shown that TRMs are more effective in increasing the deformation capacity of structures, they are generally less effective in resisting shear compared to FRP (Tetta et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Durability of GFRP grids for masonry structures

Righetti

Corradi

Borri

et al. 2016

IJFE

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This document may differ from the final, published version of the research and has been made available online in accordance with publisher policies. To read and/or cite from the published version of the research, please visit the publisher's website (a subscription may be required.) L. Righetti et al.210 days of storage in deionised water and NaCl solution. A degradation in tensile strength up to 30.2% and 10.8% was recorded for the specimens subjected to treatment in aqueous solution and to high cycle fatigue testing, respectively. This degradation indicated that extended storage in a wet environment may cause significant decreases of mechanical properties.

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Analytical Modeling of Masonry-Infilled RC Frames Retrofitted with Textile-Reinforced Mortar

Cited by 51 publications

References 37 publications

Numerical Modeling of Masonry-Infilled Rc Frame Strengthened With TRM

Numerical Modeling of Masonry-Infilled Rc Frame Strengthened With TRM

TRM reinforcement of masonry specimens for seismic areas

Durability of GFRP grids for masonry structures

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