Repair of in-plane shear damaged masonry walls with external FRP

María, Hernán Santa; Alcaíno, Pablo

doi:10.1016/j.conbuildmat.2010.09.030

Cited by 69 publications

(23 citation statements)

References 6 publications

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“…It needs to be stressed that the failure of CRM wall was largely a ected by the magnitude of damage and repair scheme [13,19]. e failure of CRM wall in the present study consisted of the CFRP grid debonding failure and shear diagonal cracks in the unrepaired masonry areas.…”

Section: Failure Mechanismmentioning

confidence: 88%

“…ese walls were consequently damaged and later repaired with FRP. en, the repaired walls were tested to failure [13,19,20]. e results from Zhou et al [13] and Santa-Maria and Alcaino [19] suggested that the repair scheme needed to be determined according to the magnitude of damage and proved that the maximum resistance of the repaired walls depended on the repair scheme.…”

Section: Introductionmentioning

confidence: 99%

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Seismic Performance of Multistorey Masonry Structure with Openings Repaired with CFRP Grid

Tao

Xue-ping

et al. 2018

Advances in Civil Engineering

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FRP composites have been used for strengthening RC and masonry structures for decades. However, the researches on repairing multistorey masonry structures using FRP grids were relative less. In the present paper, an experimental study on the seismic performance of multistorey masonry structure with openings repaired with CFRP grid is introduced. Specifically, a 1/3-scale three-floor masonry wall with window openings was tested under quasistatic action to simulate the seismic damages. The damaged masonry wall was then repaired by externally bonding CFRP grids to the areas where the cracks intensively occurred. The repaired masonry wall was retested under the same loading to investigate the seismic resistance and assess the recovery attributed from the CFRP grid repairing. The findings of this study showed that CFRP grid repairing could effectively postpone or even prevent the occurrence and development of cracking. The seismic resistance of the masonry, including shear capacity, energy dissipation capacity, deformability, stiffness degradation, and ductility, was restored. The application of CFRP grid may shift the failure mechanism of the multistorey masonry wall. The recommendation of repair scheme for the similar structures was also proposed in accordance with the findings of the present work.

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Section: Failure Mechanismmentioning

confidence: 88%

Section: Introductionmentioning

confidence: 99%

Seismic Performance of Multistorey Masonry Structure with Openings Repaired with CFRP Grid

Tao

Xue-ping

et al. 2018

Advances in Civil Engineering

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“…In recent years, with the increasing demand for masonry structure reinforcement, multiple techniques and products have become available to improve the seismic performance of masonry structures. For example, Santa‐Maria H et al, repaired cracked masonry walls with external fiber‐reinforced polymer (FRP), which could avoid the brittle failure mode, effectively restrain the development of existing cracks and enhance the seismic performance of masonry walls. The strain‐hardening characteristic of engineered cementitious composites (ECC) makes it an ideal material for earthquake strengthening of unreinforced masonry walls.…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation of seismic behavior of confined cavity walls retrofitted with reactive powder concrete overlays

Yang

Dai

et al. 2019

Structural Concrete

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Brick cavity wall structures are widely distributed in southeastern China; however, their integrity and seismic behavior are extremely poor. To solve this problem, a new technique is proposed to enhance the seismic behavior of brick cavity walls using steel fiber reactive powder concrete (SFRPC) overlays. Two unreinforced cavity walls and four cavity walls strengthened with SFRPC overlays (applied over the entire wall surface) were tested under cyclic loading. In this study, the damage and failure modes of the specimens were analyzed in terms of the load displacement curves; furthermore, a comparative investigation was performed considering the load capacity, ductility, stiffness degradation, and energy dissipation capacity to demonstrate the merits of brick cavity walls strengthened with SFRPC overlays. The effect of strengthening using different thicknesses of reinforcement was investigated. In addition, damage analyses of the walls were performed based on the modified Park–Ang damage assessment model.

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“…Some of the retrofitting methods include the seismic retrofit of URM walls using externally-bonded or near surface mounted Fiber Reinforced Polymer (FRP) laminates, bars and fabrics. Experiments on various patterns and layouts of FRP have validated that FRP can significantly increase in-plane and out-of-plane strength of URM walls [7,[9][10][11][12][13][14][15][16][17][18][19][20][21][22]. Higher strength to weight ratio, ease of application and corrosion resistance are some of well-known advantages of FRP retrofitting technique over conventional retrofitting methods.…”

Section: Introductionmentioning

confidence: 99%

Fiber Reinforced Polymer and Polypropylene Composite Retrofitting Technique for Masonry Structures

et al. 2015

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In the current research work, an attempt is made to increase the seismic capacity of unreinforced masonry (URM) structures by proposing a new composite material which can improve shear strength and deformation capacity of URM wall systems. Fiber Reinforced Polymer (FRP) having high tensile and shear stiffness can significantly increase in-plane and out-of-plane strength of masonry walls, but, inherently, FRP strengthened wall systems exhibit brittle failure under extreme seismic loading. Polypropylene (PP-band) is a low cost material with sufficient ductility and deformation capacity. Keeping in view the behavior of FRP and PP-band, a composite of FRP and PP-band is proposed for retrofitting of URM walls. Mechanical behavior of the proposed composite material is assessed by carrying out an in-plane diagonal compression test and an out-of-plane bending test on twenty-five 1/4-scaled masonry wall panels. Experimental plan for each panel, URM, PP-band retrofitted, FRP retrofitted and FRP + PP-band retrofitted masonry, is diagonal compression test and three-point bending test. Experimental results have determined that FRP + PP-band composite increased, not only the initial peak strength, but also the ductility, deformation capacity and residual strength of URM wall systems. OPEN ACCESSPolymers 2015, 7 964

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Repair of in-plane shear damaged masonry walls with external FRP

Cited by 69 publications

References 6 publications

Seismic Performance of Multistorey Masonry Structure with Openings Repaired with CFRP Grid

Seismic Performance of Multistorey Masonry Structure with Openings Repaired with CFRP Grid

Experimental investigation of seismic behavior of confined cavity walls retrofitted with reactive powder concrete overlays

Fiber Reinforced Polymer and Polypropylene Composite Retrofitting Technique for Masonry Structures

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