[pt] Nas últimas décadas, perfis pultrudados de polímeros reforçados com fibra (PRF) vêm despertando grande interesse na indústria civil devido a sua alta relação entre resistência e peso e sua aplicabilidade em ambientes agressivos. Apesar de apresentar grande resistência às intempéries, a degradação dos PRF foi notada após anos de exposição em campo. A utilização de ensaios não destrutivos (END) se mostra como uma boa alternativa para avaliar a integridade deste material, havendo especial interesse para controle de qualidade de baixo custo em campo. Dessa forma, este trabalho utilizou ensaios de vibração livre com duas técnicas de excitação por impulso para detectar danos em polímeros reforçados com fibra de vidro envelhecidos em câmaras com elevada temperatura, umidade e salinidade. Através da avaliação das frequências naturais e amortecimentos, foi observado o impacto das condições ambientais na integridade do material, resultado corroborado pela variação das propriedades elásticas obtidas através da resposta dinâmica acústica. / [en] In the last decades, pultruded profiles of fiber-reinforced polymers (FRP) have been attracting great interest in the civil industry due to their high strength-to-weight ratio and their applicability in aggressive environments. Despite showing great resistance to weathering, the degradation of FRP was noticed after years of exposure in the field. The use of non-destructive techniques (NDT) has been shown to be a good alternative to evaluate the integrity of this material, with special interest for low-cost quality control in the field. Thus, this work used free vibration tests with two impulse excitation techniques to detect damage in glass fiber reinforced polymers aged in chambers with high temperature, humidity and salinity. Through the evaluation of natural frequencies and damping, the impact of environmental conditions on the integrity of the material was observed, a result corroborated by the variation of elastic properties obtained through the acoustic dynamic response.

[pt] O comportamento de vigas de concreto armado com barras de polímero reforçado com fibras de vidro (PRFV) submetidas ao esforço cortante tem diferenças quando comparada ao tradicional uso de armaduras de aço. O relativo baixo módulo de elasticidade e menor resistência ao carregamento transversal de barras de PRFV alteram a ação dos mecanismos de resistência e cinemática da fissura crítica ao cortante. Nesse contexto, a aplicação de fibras dispersas na matriz de concreto se coloca como uma possibilidade para buscar a redução da flexibilidade desse tipo de elemento. Sendo assim, este trabalho investiga o comportamento experimental de quatro vigas de concreto armado com barras de PRFV sem e com estribos e fibras de basalto. Utilizando-se da técnica de Correlação de Imagem Digital (CID), os campos de deslocamentos do vão de ruptura foram mapeados e, por meio de modelos constitutivos dos mecanismos resistentes à força cortante disponíveis na literatura, analisou-se o comportamento resistente das vigas. A quantificação de resistência através dos modelos constitutivos apresentou uma satisfatória correlação com os resultados experimentais. Além disso, a análise possibilitou uma melhor compreensão da contribuição dos mecanismos resistentes em diferentes estágios de carregamento. / [en] The shear behavior of reinforced concrete beams with Glass Fiber Reinforced Polymer Bars (GFRP) has differences when compared to traditional steel reinforcement. The relative low modulus of elasticity and the lower resistance to transverse loading of GFRP bars change the resistance mechanisms and kinematics of the critical shear crack. In this context, the application of dispersed fibers in the concrete matrix may be used to try to reduce the flexibility of this type of element. Therefore, this work investigates the experimental behavior of four reinforced concrete beams with GFRP bars with and without stirrups and basalt fibers. By using Digital Image Correlation (DIC) technique, the displacement fields of the failure span were mapped and, by means of constitutive models of the shear resistant mechanisms available in the literature, the resistant behavior of the beams was analyzed. The evaluation of resistance mechanisms through the constitutive models showed a satisfactory correlation with the experimental results. In addition, the analysis provided a better understanding of the contribution of each resistant mechanisms at different stages of loading.

Abstract : Steel and fiber-reinforced-polymer (FRP) materials have different mechanical and physical characteristics. High corrosion resistance, high strength to weight ratio, non-conductivity, favorable fatigue enable the FRP to be considered as alternative reinforcement for structures in harsh environment. Meanwhile, FRP bars have low modulus of elasticity and linear-elastic stress-strain curve. These features raise concerns about the applicability of using such materials as reinforcement for structures prone to earthquakes. The main demand for the structural members in structures subjected to seismic loads is dissipating energy without strength loss which is known as ductility. In the rigid frames, columns are expected to be the primary elements of energy dissipation in structures subjected to seismic loads. The present study addresses the feasibility of reinforced-concrete columns totally reinforced with glass-fiber-reinforced-polymer (GFRP) bars achieving reasonable strength and the drift requirements specified in various codes. Eleven full-scale reinforced concrete columns—two reinforced with steel bars (as reference specimens) and nine totally reinforced with GFRP bars—were constructed and tested to failure. The columns were tested under quasi-static reversed cyclic lateral loading and simultaneously subjected to compression axial load. The columns are 400 mm square cross-section with a shear span 1650 mm. The specimen simulates a column with 3.7 m in height in a typical building with the point of contra-flexure located at the column mid-height. The tested parameters were the longitudinal reinforcement ratio (0.63, 0.95 and 2.14), the spacing of the transverse stirrups (80, 100, 150), tie configuration (C1, C2, C3 and C4), and axial load level (20%, 30% and 40%). The test results clearly show that properly designed and detailed GFRP-reinforced concrete columns could reach high deformation levels with no strength degradation. An acceptable level of energy dissipation compared with steel-reinforced concrete columns is provided by GFRP reinforced concrete columns. The dissipated energy of GFRP reinforced concrete columns was 75% and 70% of the counter steel columns at 2.5% and 4% drift ratio respectively. High drift capacity achieved by the columns up to 10% with no significant loss in strength. The high drift capacity and acceptable dissipated energy enable the GFRP columns to be part of the moment resisting frames in regions prone to seismic activities. The experimental ultimate drift ratios were compared with the estimated drift ratios using the confinement Equation in CSA S806-12. It was found from the comparison that the confinement Equation underestimates values of the drift ratios thus the experimental drift ratios were used to modify transverse FRP reinforcement area in CSA S806-12. The hysteretic behavior encouraged to propose a design procedure for the columns to be part of the moderate ductile and ductile moment resisting frames. The development of design guidelines, however, depends on determining the elastic and inelastic deformations and on assessing the force modification factor and equivalent plastic-hinge length for GFRP-reinforced concrete columns. The experimental results of the GFRP-reinforced columns were used to justify the design guideline, proving the accuracy of the proposed design equations. / L’acier et les matériaux à base de polymères renforcés de fibres (PRF) ont des caractéristiques physiques et mécaniques différentes. La résistance à la haute corrosion, le rapport résistance vs poids, la non-conductivité et la bonne résistance à la fatigue font des barres d’armature en PRF, un renforcement alternatif aux barres d’armature en acier, pour des structures dans des environnements agressifs. Cependant, les barres d’armature en PRF ont un bas module d’élasticité et une courbe contrainte-déformation sous forme linéaire. Ces caractéristiques soulèvent des problèmes d'applicabilité quant à l’utilisation de tels matériaux comme renforcement pour des structures situées en forte zone sismique. La principale exigence pour les éléments structuraux des structures soumises à des charges sismiques est la dissipation d'énergie sans perte de résistance connue sous le nom de ductilité. Dans les structures rigides de type cadre, on s'attend à ce que les colonnes soient les premiers éléments à dissiper l'énergie dans les structures soumises à ces charges. La présente étude traite de la faisabilité des colonnes en béton armé entièrement renforcées de barres d’armature en polymères renforcés de fibres de verre (PRFV), obtenant une résistance et un déplacement latéral raisonnable par rapport aux exigences spécifiées dans divers codes. Onze colonnes à grande échelle ont été fabriquées: deux colonnes renforcées de barres d'acier (comme spécimens de référence) et neuf colonnes renforcées entièrement de barres en PRFV. Les colonnes ont été testées jusqu’à la rupture sous une charge quasi-statique latérale cyclique inversée et soumises simultanément à une charge axiale de compression. Les colonnes ont une section carrée de 400 mm avec une portée de cisaillement de 1650 mm pour simuler une colonne de 3,7 m de hauteur dans un bâtiment typique avec le point d’inflexion situé à la mi-hauteur. Les paramètres testés sont : le taux d’armature longitudinal (0,63%, 0,95% et 2,14 %), l'espacement des étriers (80mm, 100mm, 150 mm), les différentes configurations (C1, C2, C3 et C4) et le niveau de charge axiale (20%, 30 % et 40%). Les résultats des essais montrent clairement que les colonnes en béton renforcées de PRFV et bien conçues peuvent atteindre des niveaux de déformation élevés sans réduction de résistance. Un niveau acceptable de dissipation d'énergie, par rapport aux colonnes en béton armé avec de l’armature en acier, est atteint par les colonnes en béton armé de PRFV. L'énergie dissipée des colonnes en béton armé de PRFV était respectivement de 75% et 70% des colonnes en acier à un rapport déplacement latéral de 2,5% et 4%. Un déplacement supérieur a été atteint par les colonnes en PRFV jusqu'à 10% sans perte significative de résistance. La capacité d’un déplacement supérieur et l’énergie dissipée acceptable permettent aux colonnes en PRFV de participer au moment résistant dans des régions sujettes à des activités sismiques. Les rapports des déplacements expérimentaux ultimes ont été comparés avec les rapports estimés en utilisant l’Équation de confinement du code CSA S806-12. À partir de la comparaison, il a été trouvé que l’Équation de confinement sous-estime les valeurs des rapports de déplacement, donc les rapports de déplacement expérimentaux étaient utilisés pour modifier la zone de renforcement transversal du code CSA S806-12. Le comportement hystérétique encourage à proposer une procédure de conception pour que les colonnes fassent partie des cadres rigides à ductilité modérée et résistant au moment. Cependant, l'élaboration de guides de conception dépend de la détermination des déformations élastiques et inélastiques et de l'évaluation du facteur de modification de la force sismique et de la longueur de la rotule plastique pour les colonnes en béton armé renforcées de PRFV. Les résultats expérimentaux des colonnes renforcées de PRFV étudiées ont été utilisés pour justifier la ligne directrice de conception, ce qui prouve l’efficacité des équations de conception proposées.

[pt] Materiais compósitos pultrudados poliméricos reforçados com fibra de vidro (PRFV) são aplicados em diversos setores da indústria por apresentarem boas resistências mecânicas, baixo peso específico e alta resistência à corrosão. A exposição a ambientes agressivos tais como imersão em água, condicionamento sob alta umidade relativa, temperatura baixa e elevada, ciclos térmicos e úmidos, bem como a combinação desses efeitos, tornou-se cada vez mais objeto de estudo para esses tipos de materiais. A compreensão dos efeitos das condições ambientais no comportamento do material é essencial para avaliar seu desempenho e, desta forma, garantir a segurança necessária ao projeto estrutural. Com o objetivo de compreender melhor a influência de diferentes condições ambientais nas propriedades do material compósito PRFV, foram estudados os efeitos da temperatura e umidade, além da ação combinada dessas duas condições, nas suas propriedades físicas, químicas, térmicas e mecânicas. Neste estudo, foram levados em conta aspectos importantes que influenciam o comportamento do material, como a resina utilizada, o grau de cura, e características químicas e físicas do material. Os ensaios experimentais foram conduzidos em quatro condições ambientais: (i) exposição a temperaturas moderadas/elevadas (70 graus C à 330 graus C), (ii) imersão em água deionizada (25 graus C, 55 graus C e 70 graus C), (iii) exposição à névoa salina em câmaras de envelhecimento higrotérmico (35 graus C, 55 graus C e 70 graus C), e (iv) exposição a ambiente externo real. Além disso, foram aplicados modelos teóricos para avaliação dos resultados. Foi observado que a temperatura, o tempo de condicionamento e a umidade são fatores preponderantes no comportamento do material. Adicionalmente, uma questão importante para o estudo de pultrudados reside na compreensão das propriedades interlaminares do material. Nesse contexto, a fratura interlaminar, associada às fissuras no plano longitudinal entre as camadas do material, é uma das principais causas de falha em compósitos pultrudados. Consequentemente, a análise da fratura em modo II, que avalia o mecanismo da propagação da fissura no plano interlaminar, vem ganhando espaço no estudo de materiais compósitos. A análise de fratura em modo II não é trivial ou normatizada para compósitos pultrudados PRFV, de forma que poucos dados e conclusões efetivas foram obtidos até o momento a esse respeito. Com o objetivo de suprir essa lacuna, realizou-se uma extensa investigação experimental, culminando na proposição de uma nova metodologia para avaliação da fratura em modo II em materiais compósitos poliméricos pultrudados reforçados com fibra de vidro (PRFV). / [en] Pultruded glass-fiber reinforced polymer (GFRP) composites are applied in various industrial sectors due to their good mechanical strength, low specific weight, and high resistance to corrosion. Exposure to aggressive environments has become an increasingly studied topic for these materials, such as immersion in water, conditioning under high relative humidity, low and high temperatures, thermal and humid cycles, as well as the combination of these effects. Understanding the effects of environment condition on material behavior is essential to evaluate its performance and ensure the necessary safety for structural design. In order to better understand the influence of environmental conditions on the properties of GFRPs, the effects of temperature and humidity, as well as the combined action of these two effects, on their physical, chemical, thermal, and mechanical properties were studied. Important aspects that influence the material s behavior were considered, such as the resin used, the degree of curing, and the chemical and physical characteristics of the material. Experimental tests were conducted under four environmental conditions: (i) exposure to moderate/high temperatures (70 degrees C to 330 degrees C), (ii) immersion in deionized water (25 degrees C, 55 degrees C, and 70 degrees C), (iii) exposure to salt spray in hygrothermal aging chambers (35 degrees C, 55 degrees C, and 70 degrees C), and (iv) exposure to real outdoor environment. In addition, theoretical models were applied to evaluate the results. It was observed that temperature, conditioning time, and moisture are predominant factors in material behavior. Additionally, a important issue for the study of pultruded composites lies in understanding the interlaminar properties of the material. In this context, interlaminar fracture, associated with longitudinal cracks between the layers of the material, is one of the main causes of failure in pultruded composites. Consequently, mode II fracture analysis, which evaluates the mechanism of crack propagation in the interlaminar plane, has been gaining ground in the study of composite materials. Mode II fracture analysis is not trivial or standardized for pultruded GFRP composites, so few data and effective conclusions have been obtained in this regard so far. In order to fill this gap, an extensive experimental investigation was carried out, culminating in the proposal of a new methodology for evaluating mode II fracture in pultruded GFRPs.

[pt] A utilização de barras de polímero reforçado por fibras de vidro (glass fiber reinforced polymer, GFRP, em inglês) como reforço de estruturas de concreto armado, vem ganhando popularidade principalmente devido à sua resistência à corrosão e resistência mecânica. Entretanto, seu baixo módulo de elasticidade pode acarretar em problemas na estrutura em serviço, como grandes aberturas de fissuras e deflexões quando comparado com concreto armado por barras de aço. No presente estudo, um programa experimental foi realizado com o objetivo de avaliar a influência da adição de 10 kg/m3 de fibras de polipropileno (PP) em elementos de concreto armado por barras de GFRP submetidos à tração direta e flexão. Caracterização mecânica e ensaios de arrancamento (pullout) foram realizados para avaliar as propriedades dos materiais constituintes e de sua interface, respectivamente. A formação e evolução das fissuras, bem como o efeito de enrijecimento à tração no material proposto, foram avaliados por meio de ensaios de tração direta em prismas de concreto armado. Ensaios de flexão em quatro pontos foram realizados para investigar o desenvolvimento da deflexão com o carregamento, o padrão de fissuração e o comportamento momento-curvatura dos espécimes. Correlação de imagem digital (digital image correlation, DIC, em inglês) foi utilizada para monitoramento de deformações, distâncias e aberturas de fissuras relevantes para a análise. Por fim, os resultados dos ensaios de flexão foram comparados com um modelo analítico. Uma redução considerável da abertura de fissuras e um melhor comportamento de múltipla fissuração foi observado para os espécimes com adição de fibras, além de um pequeno acréscimo de rigidez à flexão. / [en] Glass-fiber reinforced polymer (GFRP) bars have been more often used in reinforced concrete (RC) structures mainly due to superior corrosion resistance and mechanical strength. However, the low modulus of elasticity leads to serviceability issues such as wider crack openings and larger deflections when compared to conventional RC. To improve the performance and allow for a more effective use of GFRP reinforcement, the addition of randomly disperse short polypropylene fibers (PP) to the concrete matrix is proposed. In the present study, an experimental program intending to investigate the flexural and tensile behavior of concrete members reinforced with GFRP bars and 10 kg/m3 of PP is carried out. Mechanical characterization and pull-out tests were carried out respectively to characterize the materials and interface between GFRP bar and concrete. Crack formation and growth, and tension stiffening effect in the proposed construction material were investigated by tension tests in reinforced concrete prisms. Four points bending tests were performed to evaluate the mid-span deflection, crack opening and moment-curvature relationship of the specimen. Digital image correlation was used to gather information about relevant data. It was proposed an analytical model to compare the results obtained in bending tests. A considerable reduction in crack openings, a better multiple cracks behavior and a slightly stiffer behavior was obtained due to fiber addition.

Ce présent travail concerne les aspects de la réparation et du renforcement des ouvrages utilisant des matériaux composites et plus particulièrement, il traite le cas des poutres en béton endommagées. La méthode de renforcement des ouvrages en béton par collage de matériaux composites est une pratique qui connaît actuellement un essor important. Dans cette optique, on propose d’apporter une contribution à l’analyse du comportement des poutres endommagées en béton par matériaux composites. La nouvelle méthode de renforcement interne NSM (Near Surface Mounted) consiste en l’insertion de bandes de Polymères Renforcées de Fibres (PRF) dans des engravures préparées préalablement dans le béton d'enrobage des surfaces tendues, remplies de résines époxydiques pour fixation. Pour construire un système renforcé de NSM efficace, les armatures en PRF doivent être en mesure de transférer ses efforts longitudinaux développés à l'élément de flexion en béton armé afin d'assurer l’action du composite, avec une compatibilité de déformation des matériaux. Les spécimens testés sont composés de poutres coutres avec une section rectangulaire de (100 mm x180 mm) et une longueur de 1300 mm renforcés avec PRFC-NSM. D’autres spécimens de poutres rectangulaires ont été testés avec une section de 200 mm x 400 mm et une longueur de 2300 mm, les renforts en PRF utilisés sont des plats ou des joncs. Les paramètres étudiés dans ce travail concernent la classe de résistance en compression, le taux de renfort, le type de composite et le degré d’endommagement. L’étude expérimentale sur le comportement des poutres endommagées puis renforcées sollicitées en flexion 4 points a dévoilé beaucoup de critères de performances en termes de ductilité, de rigidité et de capacité portante. Une modélisation analytique a été menée afin de comparer les réponses moment-courbure analytiques avec celles obtenues expérimentalement. Une fois cette modélisation validée, l’approche analytique a été couplée avec la méthode des plans d’expériences dans le but d’évaluer l’influence de différents paramètres et leurs interactions tels que le type de renfort (carbone, Joncs, aramide), le taux d’armatures passives et de renfort et la classe de résistance sur les réponses concernant la capacité portante et la ductilité des poutres renforcées. / This work deals with aspects of repair and reinforcement of structures and in particular, it deals with the case of damaged concrete beams. The method of reinforcing concrete structures by adhesive bonding of composite materials is a practice which is currently undergoing a major expansion. In this context, we propose to contribute to the analysis of the behavior of damaged concrete beams by composite materials. The new NSM (Near Surface Mounted) internal reinforcement method consists of the insertion of carbon fiber reinforced polymer (PRFC) strips in pre-prepared etchings in the encapsulation concrete of stretched surfaces filled with epoxy resins for fixing. To build an effective NSM reinforced system, FRP reinforcements must be able to transfer its developed longitudinal forces to the reinforced concrete flexure element to ensure the action of the composite with material deformation compatibility. The specimens tested consist of beams with a rectangular section (100 mm x 180 mm) and a length of 1300 mm reinforced with PRFC-NSM. Other specimens of rectangular beams were tested with a section of 400 mm x 800 mm and a length of 2300 mm, the FRP reinforcements used were either plates or rods. The parameters studied in this work concern the strength of the concrete, the reinforcement rate, the type of composite, the degree of damage. The experimental study on the behavior of damaged beams, then reinforced and subjected to bending, revealed many performance criteria in terms of ductility, stiffness and bearing capacity. Analytical modeling coupled with the experimental design method was carried out in order to evaluate the responses of the beams tested according to the interaction of the different parameters such as the reinforcement type (carbon, joncs, aramid), the Passive and reinforcement rates and strength class of reinforced beams.

Es muy probable que hoy en día cualquier objeto que esté a nuestro alrededor haya estado en algún momento de su vida en el interior de un camión de carga, ya que estos son indispensables para el transporte de cualquier tipo de elemento. Desde alimentos, prendas de vestir, muebles, materiales de construcción, hasta maquinaria pesada es transportada por estos vehículos pesados. Por este motivo son considerados parte esencial de la economía mundial, pero al ser sometidos a grandes cargas, estos producen una gran contaminación ambiental, debido al combustible que utilizan. La presente investigación tuvo como objetivo disminuir el consumo de combustible del camión mediante la implementación del material compuesto PRFV (Plástico Reforzado con Fibra de Vidrio) como material principal en el chasis en vez de los aceros comúnmente utilizados en su manufactura. La metodología utilizada inició con el dimensionamiento del chasis y se evaluó las propiedades mecánicas del PRFV, para después proceder a la simulación estáticofrecuencial del chasis; los resultados de la simulación fueron comparados con respecto al acero AISI 4135 para finalmente proceder con el cálculo del consumo de combustible del camión con el nuevo material. Con el cambio de material se logró disminuir el peso del camión en 536 Kg, generando así un ahorro de 438.4 L en el uso de combustible, lo cual da un ahorro económico de S/1995.31. / Its most likely nowadays that any object around us has been at some moment in its life inside a cargo truck, since these are indispensable for the transportation of any type of element. From food, clothing, furniture, construction materials, to heavy machinery is transported by these heavy vehicles. For this reason, they are considered an essential part of the world economy, but when subjected to heavy loads, they produce a great amount of environmental pollution, due to the fuel they use. The objective of this research is to reduce the fuel consumption of the truck by implementing GFRP (Glass Fiber Reinforced Plastic) as the main material in the chassisinstead of the Steel commo nly used in its manufacture. The methodology used started with the sizing of the chassis and the mechanical properties of the GFRP were evaluated and then proceeded to the static-frequency simulation of the chassis, the results of the simulations were compared with the Steel alloy AISI 4135, to finally proceed to calculate the fuel consumption of the truck with the new material. By changing the material, the weight of the truck was reduced by 536Kg, which generate a saving of 438.4 L in fuel consumption, resulting in a economic saving of S/.1995,31.

Abstract : The present study addressed the feasibility of reinforced-concrete squat walls totally reinforced with GFRP bars to attain reasonable strength and drift requirements as specified in different codes. Nine large-scale squat walls with aspect ratio (height to length ratio) of 1.33—one reinforced with steel bars (as reference specimen) and eight totally reinforced with GFRP bars—were constructed and tested to failure under quasi-static reversed cyclic lateral loading. The key studied parameters were: (1) use of bidiagonal web reinforcement; (2) use of bidiagonal sliding reinforcement; and (3) web reinforcement configuration (horizontal and/or vertical) and ratio. The reported test results clearly revealed that GFRP-reinforced concrete (RC) squat walls have a satisfactory strength and stable cyclic behavior as well as self-centering ability that assisted in avoiding sliding shear that occurred in the companion steel-reinforced wall following steel yielding. The results are promising regarding using GFRP-reinforced squat walls in areas prone to seismic risk where environmental conditions are adverse to steel reinforcement. Bidiagonal web reinforcement was shown to be more effective than conventional web reinforcement in controlling shear-cracks width. Using bidiagonal sliding reinforcement was demonstrated to be not necessary to prevent sliding shear. The horizontal web reinforcement ratio was found to have a significant effect in enhancing the ultimate strength and deformation capacity as long as the failure is dominant by diagonal tension. Existence of both horizontal and vertical web reinforcement was shown to be essential for cracks recovery. Assessment of the ultimate strengths using the available FRP-reinforced elements code and guidelines (CSA S806-12 and ACI 440.1R-15) was conducted and some recommendations were proposed to attain a reasonable estimation of ultimate strengths. Given their importance in estimating the walls’ later displacement, the effective flexural and shear stiffness of the investigated walls were evaluated. It was found that the cracked shear stiffness could be estimated based on the truss model; while the flexural stiffness can be estimated based on the available expressions in FRP-reinforced elements codes and guidelines. Based on a regression analysis, a simple model that directly correlates the flexural and shear stiffness degradation of the test walls to their top lateral drift was also proposed. / Résumé : La présente étude traite de la faisabilité de voiles courts en béton armé totalement renforcés avec des barres de polymères renforcés de fibres de verre (PRFV), obtenant une résistance et un déplacement latéral raisonnable par rapport aux exigences spécifiées dans divers codes. Neuf voiles à grande échelle ont été construits: un renforcé avec des barres d'acier (comme spécimen de référence) et huit renforcés totalement avec des barres de PRFV. Les voiles ont été testés jusqu’à la rupture sous une charge quasi-statique latérale cyclique inversée. Les voiles ont une hauteur de 2000 mm, une largeur de 1500 mm (élancement 2000 mm/1500 mm = 1,33) et une épaisseur de 200 mm. Les paramètres testés sont : 1) armature bi-diagonale dans l’âme; 2) armature bi-diagonale dans l’encastrement du mur à la fondation (zone de glissement); 3) configuration d’armature verticale et horizontale réparties dans l’âme et taux d’armature. Les résultats des essais ont clairement montré que les voiles courts en béton armé de PRFV ont une résistance satisfaisante et un comportement cyclique stable ainsi qu'une capacité d'auto-centrage qui ont aidé à éviter la rupture par glissement à l’encastrement (sliding shear). Ce mode de rupture (sliding shear) s’est produit pour le voile de référence armé d’acier après la plastification de l’armature. Les résultats sont prometteurs concernant l'utilisation de voiles en béton armé de PRFV dans les régions sismiques dans lesquelles les conditions environnementales sont défavorables à l’armature d’acier (corrosion). L’armature bi-diagonale en PRFV dans l’âme s’est avérée plus efficace pour le contrôle des largeurs de fissures de cisaillement comparativement à l’armature répartie dans l’âme. L'utilisation d'un renforcement de cisaillement bi-diagonal a été démontrée comme n'étant pas nécessaire dans les voiles courts en béton armé de PRFV pour prévenir la rupture par glissement à l’encastrement (shear sliding). Par ailleurs, les résultats d’essais ont montré que le taux d’armature horizontale répartie dans l’âme a un effet significatif sur l’augmentation de la résistance et la capacité en déformation des voiles dont la rupture par effort tranchant se fait par des fissures diagonales (tension failure). L'existence d’armature verticale et horizontale répartie dans l’âme du voile en béton armé de PRFV s'est révélée essentielle pour l’ouverture et la fermeture des fissures au cours des chargements cycliques. Les normes calcul CSA S806-12 et ACI 440.1R-15 ont été utilisées pour évaluer la résistance au cisaillement des voiles courts en béton armé de PRFV. Certaines recommandations ont été proposées pour obtenir une estimation raisonnable des forces ultimes. Compte tenu de leur importance dans l'estimation du déplacement latérale des voiles, la rigidité effective en flexion et en cisaillement des voiles étudiés a été évaluée. On a constaté que la raideur de cisaillement du béton fissuré pourrait être estimée en utilisant le modèle de treillis. La rigidité à la flexion peut être, quant à elle, estimée en fonction des expressions disponibles dans les normes et les guides de conception de membrures en béton armé avec des barres en PRFV. Sur la base d'une analyse de régression, un modèle simple qui corrèle directement la dégradation de la rigidité en flexion et en cisaillement des voiles courts en béton armé de PRFV testés avec le déplacement latérale dans la partie supérieure des voiles a également été proposé.