Experimental performance of FRCM retrofit on out-of-plane behaviour of clay brick walls

D’Ambra, Claudio; Lignola, Gian Piero; Prota, Andrea; Sacco, Elio; Fabbrocino, Francesco

doi:10.1016/j.compositesb.2018.04.062

Cited by 62 publications

(32 citation statements)

References 19 publications

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“…This allowed remarking the effect of retrofitting predamaged and new walls. The authors Preti et al in 2018 had described the results of quasi‐static tests performed on a real‐scale adobe masonry infill wall partitioned into subpanels by means of the introduction of vertical wooden planks, acting as sliding joints. The specimen was tested both in‐plane and out‐of‐plane, exhibiting good performance in terms of both stability against out‐of‐plane actions and in‐plane deformation capacity and damage control.…”

Section: Related Worksupporting

confidence: 66%

Deep neural network‐based mechanical behavior analysis for various masonry infill walls with hybrid fiber mortar

Pitchaipillai¹,

Kumar²

2019

Structural Concrete

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Reinforced Concrete buildings with masonry infills are among the most common structural systems in many countries with regions of high seismicity. Masonry infill walls increase robustness of damaged RC structures. Although their mechanical contribution is usually neglected in structural analysis and design, they significantly affect the seismic response of RC frames. In this paper, we concentrate on the development of infill walls by using various structure design and brick types. An experimental investigation is carried out on two types of mortar mixes like conventional mortar and mortar used with hybrid fibers (polypropylene, sisal, kenaf, and aramid). Here, two types of masonry brick infills such as clay bricks and fly ash bricks are used. After construction of the specimens, each was marked properly according to their respective test of total 60 specimens, which have conventional and fiber‐mixed mortars. After 28 days curing, the masonry specimens attain their full strength and they became ready for the test. The material ratio followed to construct test specimens was according to the Indian standard. The shear test is conducted for masonry triplets and the flexural test is conducted for masonry wall panel structures. After that, the mechanical properties of this structure are validated with the help of the Restricted Boltzmann Machine (RBM)‐based Deep Neural Network (DNN). The performance of the proposed modeling is evaluated by comparing with those of the existing techniques.

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Section: Related Worksupporting

confidence: 66%

Deep neural network‐based mechanical behavior analysis for various masonry infill walls with hybrid fiber mortar

Pitchaipillai¹,

Kumar²

2019

Structural Concrete

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“…Early work by Corradi et al (2016) suggested that, by using high-strength steel cords embedded in the mortar joints, a reinforced joint repointing could be formed and test results demonstrated that it is possible to increase the masonry shear capacity using this retrofitting method. A similar approach have been recently applied by other researchers (Babaeidarabad et al 2014;D'Ayala and Paganoni 2014;Wang et al 2016;D'Antino et al 2018;D'Ambra et al 2018;Casacci et al 2019). The basic idea is to use an inorganic matrix (i.e.…”

Section: Introductionmentioning

confidence: 99%

Out-of-plane reinforcement of masonry walls using joint-embedded steel cables

Corradi

Speranzini

Bisciotti³

2020

Bull Earthquake Eng

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The out-of-plane mechanism (rocking) of walls often causes fatalities and collapses of historic buildings during earthquakes. This paper addresses the problem of assessing the seismic resistance of walls subjected to out-of-plane bending, before and after reinforcement. A new retrofitting method, consisting in the use of high-strength steel cables fully embedded in the mortar bed joints was studied. An experimental investigation using fullscale brickwork specimens was therefore conducted in an attempt to assess the walls' structural response when these are subject to out-of-plane loads. Test results demonstrated that it is possible to increase the out-of-plane capacity with the proposed method. A simplified macro-element procedure is also presented along with recommendations for the calculation of the walls' capacity before and after the application of the steel cable reinforcement. Predictions of the magnitude of horizontal force required to cause out-of-plane failure using the proposed procedure and quasi-static analysis procedures are compared with the results of laboratory experiments.

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“…In fact, several authors observed good performances in practical applications [14][15][16][17][18][19]. More studies, however, are required to better understand the behavior of composite material on the structural response of strengthened masonry elements [20][21][22], both in terms of flexural [23][24][25] and shear performance [26][27][28].…”

Section: Introductionmentioning

confidence: 99%

Effects of the Mortar Matrix on the Flexural Capacity of Masonry Cross Sections Strengthened with FRCM Materials

et al. 2020

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The strengthening intervention strategies that exist for masonry buildings are based on the use of thin composites and are a recent activity used in structural engineering. Nowadays, mortar matrices are frequently found instead of epoxy resins, since the fiber reinforced cementitious matrix (FRCM) composites are more compatible with masonry than fiber reinforced plastic (FRP) ones. The mortar matrix in FRCM composites is not comparable to the epoxy resin, and therefore its contribution is different not only in traction but above all on the compression side. Due to its larger thickness, if compared to the epoxy resin, the impact of the mortar matrix on the flexural response of strengthened cross sections is not negligible. This paper aimed to investigate the influence of the contribution of the mortar matrix on the compression side on the flexural capacity of strengthened cross section. As such, p–m interaction domains and bending moment–curvature diagrams were evaluated to understand the influence of several mechanical properties of fiber and mortar matrices on FRCM efficiency, typical of real applications. Hence, the impact of several constitutive relationships of composites (linear and bilinear behavior) was considered for the structural analysis of the strengthened cross section. The presented results are all completely in a dimensionless form; therefore, independent of geometry and mechanical parameters can be the basis for developing standardized design and/or verification methodologies useful for the strengthening systems for masonry elements.

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Experimental performance of FRCM retrofit on out-of-plane behaviour of clay brick walls

Cited by 62 publications

References 19 publications

Deep neural network‐based mechanical behavior analysis for various masonry infill walls with hybrid fiber mortar

Deep neural network‐based mechanical behavior analysis for various masonry infill walls with hybrid fiber mortar

Out-of-plane reinforcement of masonry walls using joint-embedded steel cables

Effects of the Mortar Matrix on the Flexural Capacity of Masonry Cross Sections Strengthened with FRCM Materials

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