Flexural behaviour of reinforced concrete beams strengthened with a composite reinforcement layer: BFRP grid and ECC

Zheng, Yuzhou; Wang, Wenwei; Brigham, John C.

doi:10.1016/j.conbuildmat.2016.04.038

Cited by 153 publications

(46 citation statements)

References 39 publications

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“…e fatigue behavior of FRP gridreinforced concrete structures is closely related to the bonding fatigue performance of the FRP grid-concrete interface, which therefore merits its detailed study. Previous experimental studies on FRP grid-concrete interfaces have included single-lap shear tests [16][17][18], double-lap shear tests [19,20], tensile property measurements of FRP grid-polymer mortar specimens [21][22][23][24], flexural performance measurement of grid-reinforced beams and slabs [25][26][27][28][29], and shear performance measurement of FRP grid-reinforced beams [30,31] and walls [32][33][34]. ese studies were conducted under different static loading conditions to analyze the bonding properties and failure modes of the FRP gridconcrete interface with variable layer numbers, fabric types, bond widths and lengths, temperatures, and other environmental conditions.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation of the Fatigue Behavior of Basalt Fiber Reinforced Polymer Grid‐Concrete Interface

Wen

Wan

Liu

et al. 2020

Advances in Materials Science and Engineering

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Fatigue behavior is an important factor for mechanical analysis of concrete members reinforced by basalt fiber reinforced polymer (BFRP) grid and polymer cement mortar (PCM) and plays a critical role in ensuring the safety of reinforced concrete bridges and other structures. In this study, on the basis of the static loading test results of concrete specimens reinforced by BFRP grid and PCM, a series of fatigue tests with different loading levels were conducted on interfaces between BFRP grid and concrete to investigate the fatigue behavior of BFRP grid-concrete interfaces. The test results indicate that with high loading level, the fatigue failure mode of interface is interfacial peeling failure while it transforms to the fatigue fracture of the BFRP grid under low loading level. The fatigue life (S-N) curves of BFRP grid-concrete interface are obtained and fitted in stages according to different failure modes, and the critical point of the two failure modes is pointed out. The relative slip evolution of interface during fatigue is further revealed in different stages with two failure modes, and the law of interface strain is studied with the increase of fatigue times. The relation of effective bonding length of interface and fatigue times is also described.

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Section: Introductionmentioning

confidence: 99%

Experimental Investigation of the Fatigue Behavior of Basalt Fiber Reinforced Polymer Grid‐Concrete Interface

Wen

Wan

Liu

et al. 2020

Advances in Materials Science and Engineering

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“…For these reasons, the bonding behavior at the interface may deteriorate rapidly if existing concrete structures lie in harsh environments, such as over-high/low temperature, in the presence of moisture, or even near fire and underwater. Therefore, some scholars have suggested replacing the epoxy systems with some inorganic cementitious materials to develop two major strengthening systems which combine FRP composites and cement-based materials [31], namely FRP sheets/plates bonded with a cementitious material [32] Therefore, some scholars have suggested replacing the epoxy systems with some inorganic cementitious materials to develop two major strengthening systems which combine FRP composites and cement-based materials [31], namely FRP sheets/plates bonded with a cementitious material [32] and FRP grids bonded with cement mortar [33,34]. Compared to the former strengthening method, the advantages of FRP grids bonded with a cement-based material are summarized as follows: (a) the stress transfer between the FRP grid and cementitious materials is more efficient, caused by the improving of the impregnation [32,35]; (b) the drawbacks observed with the FRP sheets/plates with respect to uneven pasting and empty drums can be effectively avoided, especially when the strengthening areas are excessively large; and (c) for FRP grid strengthening, the rivets are usually considered to be a temporary anchor to attach the FRP grid on the external surface of concrete beams such that better bonding at the interface may be obtained to some extent.…”

Section: Introductionmentioning

confidence: 99%

“…However, normal mortar is easily broken due to its properties of low tensile strength and brittleness. Thus, several cementitious materials used as a thin strengthening layer, such as engineered cementitious composite (ECC) matrix [33,34,36] and polymer cement mortar (PCM) [37][38][39], have been proposed by scholars from all over the world to take the place of normal mortar with low strength. PCM, a new inorganic material used in strengthening fields, is made by pouring a small volume of organic polymer (e.g., acrylic copolymer [40], arene-perfluoroarene [41,42]) into a kind of cement mortar.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Shear Strengthening of RC Beams with an FRP Grid-PCM Reinforcement Layer

et al. 2019

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This paper investigates the shear strengthening effect of a number of reinforced concrete (RC) beams strengthened by a reinforcement layer which combines carbon fiber reinforced polymer (CFRP) grid and polymer cement mortar (PCM). A total of ten RC beams, including three types of specimens as Series A and seven kinds of specimens as Series B, were prepared and investigated. The test variables in both series of experiments included various reinforcement ranges and different reinforcement amounts that consisted of CFRP grids’ spacing and cross-section areas. The experimental results suggest that the shear strengthening effect of the CFRP grid-PCM layer for RC beams is obvious and adequate. Meanwhile, better performance is observed if the CFRP grid-PCM reinforcement layer is used for the full sectional reinforcement of RC beams with an I-shaped profile, in contrast to RC beams with reinforcement of the web only. In addition, a new evaluation method based on the effective strain of the CFRP grid is developed to determine the shear capacity of RC beams strengthened by a CFRP grid-PCM layer.

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“…Both of these products have similar manufacturing process, but basalt fiber obtains more economical and improved mechanical properties. Short basalt fiber added into concrete to fill some of the missing properties; such as, plastic shrinkage at early-age [18,19], splitting tensile and flexural strength, fracture energy, abrasion resistance, and impact resistance [20][21][22][23][24], whereas basalt fabric is used as flexural reinforcement for reinforcing concrete beams or reinforcing masonry panels [25][26][27][28][29].…”

Section: Introductionmentioning

confidence: 99%

Composite Performance Evaluation of Basalt Textile-Reinforced Geopolymer Mortar

Huang

Louda

et al. 2019

Fibers

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Basalt fiber is a novel type of inorganic fiber which is produced from the extrusion of natural vocalnic basalt rocks through their melting process at high temperature. So the quality and strength characteristics of basalt fiber depend mainly on both the quality of raw material and manufacturing processing. Basalt fabric-reinforced cementitious composites (FRCM) are a novel composite and an extensive scientific investigation is still ongoing for geopolymer composite. Based on three types of basalt textile with respect to various net sizes, the aim of this paper is to evaluate the flexural performance of basalt textile-reinforced geopolymer composite through the four-point bending test. The specimens of rectangular form with the dimension of 400 × 100 × 15 mm3, reinforced with one to four layers of each type of basalt textile, were produced. They were then tested at the age of about 40 days after casting. On the other hand, the number of the specimens reinforced with four layers were considered to assess the mechanical strength of the specimens at longer periods of ageing time (60, 90, 150, 180 days). The experimental results showed that with the increasing number of reinforcing layers, the specimens significantly improved the mechanical strength, except for those reinforced with basalt textile of big net size. The specimens reinforced with basalt textile of big net size had no impact on post-crack mechanical strength, however, it helps to arrest the catastrophic brittle failure of the specimens; the failure of these specimens is due to localization of first crack. When the specimens were exposed to the further ageing times, the mechanical strength of the specimens were decreased over time. All the reinforced specimens have the same failure mode by flexural failure due to the rupture of fiber yarn in matrix, and no debonding of fiber yarn or a gradual peeling process of mortar matrix happened during testing.

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Flexural behaviour of reinforced concrete beams strengthened with a composite reinforcement layer: BFRP grid and ECC

Cited by 153 publications

References 39 publications

Experimental Investigation of the Fatigue Behavior of Basalt Fiber Reinforced Polymer Grid‐Concrete Interface

Experimental Investigation of the Fatigue Behavior of Basalt Fiber Reinforced Polymer Grid‐Concrete Interface

Experimental Study on Shear Strengthening of RC Beams with an FRP Grid-PCM Reinforcement Layer

Composite Performance Evaluation of Basalt Textile-Reinforced Geopolymer Mortar

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