Analysis of Bond and Debonding Behavior of Continuous Fiber Sheet Bonded on Concrete

Kamiharako, Akihisa; Shimomura, Takeshi; Maruyama, Kouichi; Nishida, Hiroko

doi:10.2208/jscej.1999.634_197

Cited by 19 publications

(3 citation statements)

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“…Kamiharako et al 13) , reported that FRP laminates width has no significant effect on the bond behavior when it is more than 10mm. The BFRP grid total width used in this study is 150mm.…”

Section: (1) Test Setupmentioning

confidence: 99%

External Flexural Strengthening of Rc Beams Using BFRP Grids and PCM

Monier

Huang

et al. 2017

JJSCE A2

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External strengthening of Reinforcement Concrete (RC) structures using epoxy-bonded Fiber Reinforced Polymer (FRP) sheets has some negative aspects, such as interfacial debonding and poor resistance ability of epoxy resin for fire and ultraviolet (UV), in addition to the working environment restrictions. To overcome some of those negative aspects, FRP grid bonded with Polymer Cement Mortar (PCM) to strengthen RC structures is developed and proposed in this study. The main objective of this paper is to study the efficiency between Basalt FRP grids and PCM in the flexural strengthening of RC beams. A tensile test was first conducted to determine the static longitudinal tensile strength and maximum elongation properties of the different BFRP grids. Then, the well-known double shear test was conducted to determine the bond mechanism between BFRP grids and concrete. Finally, the flexural behavior of the RC beam externally strengthened with BFRP grids was investigated through a fourpoint bending test. The results showed the efficiency of using BFRP grids as external strengthening method, as well as the stress-strain relationship of RC beams cross-section shows the compatibility with flexural theory.

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“…Kamiharako et al 13) , reported that FRP laminates width has no significant effect on the bond behavior when it is more than 10mm. The BFRP grid total width used in this study is 150mm.…”

Section: (1) Test Setupmentioning

confidence: 99%

External Flexural Strengthening of Rc Beams Using BFRP Grids and PCM

Monier

Huang

et al. 2017

JJSCE A2

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“…Based on the literature survey, a database containing 311 shear tests on FRP-to-concrete interface was assembled in the current study. The database includes experiments reported by Bizindavyi and Neale [19], Brosens and Van Gemert [20], Adhikary and Mutsuyoshi [21], Ebead et al [22], Kamiharako et al [23], Maeda et al [13], Nakaba et al [24], Pham and Mahaidi [25], Ren [26], Sato et al [27], Takeo et al [28], Tan [29], Toutanji et al [30], Ueda et al [7], Ueda et al [31], Wu et al [32], Wu and Iwashita [33], and Zhao et al [34]. Both single shear and double shear tests are included in this database.…”

Section: Experiments and Databasementioning

confidence: 99%

A Three-Parameter Bond Strength Model for FRP—Concrete Interface

Islam

Said

2008

Journal of Reinforced Plastics and Composites

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The success of most strengthening or retrofitting technologies for concrete structures by using external bonded FRP sheets depends highly on the interface bond between FRP sheets and concrete substrates. This article presents a simplified, but more rational and accurate three-parameter bond strength model for FRP—concrete interface based on statistical analysis, in which main parameters of bond strength behavior are considered. An extensive database consisting of 311 experimental data of simple FRP-to-concrete bonded joints has been assembled to calibrate the parameters of the proposed model and examine its validity. Then, the performance of the proposed model has been compared with the performance of other existing bond strength models using the assembled database. Results have confirmed the validity of the proposed model and shown its superiority over other existing models.

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“…Notwithstanding such difficulties it is useful to compare the predictions of models with those of bond tests vis-a`-vis maximum tensile force, P max , and the effective bond length, L e . For the purposes of this investigation a large set of data, comprising results from simple bond tests consisting of single-and double-lap shear tests [8,11,15,[19][20][21][22], is used to evaluate the reliability and accuracy of each of the models discussed previously. The set of data includes variation in reinforcing fiber type (glass, carbon, aramid, and PBO fibers), reinforcement thickness (0.083-2 mm), Ulaga et al [14] Chen and Teng [9] Extended from Nakaba et al [11] Monti et al [11] Brosens and Van Gemert [7] Neubauer and Rostasy [5] Brosens [8] Brosen and Van Gemert Fracture Mechanics-based Bond Strength Models for FRP-strengthened Structures FRP width (10-200 mm), bonded length (75-700 mm), concrete compressive strength (23.8-75.5 MPa), in addition to the variation in FRP characteristics of strength (0.47-4.5 GPa) and modulus (29.2-425.1 GPa).…”

Section: Comparison With Test Datamentioning

confidence: 99%

Review and Comparison of Fracture Mechanics-based Bond Strength Models for FRP-strengthened Structures

Karbhari

Niu

Sikorsky

2006

Journal of Reinforced Plastics and Composites

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This study presents a critical review on fracture mechanics-based bond strength models related to the use of externally bonded fiber reinforced polymer (FRP) composites in the rehabilitation of concrete. The predictions from a set of typically used bond strength models are compared with each other through a set of parametric studies. Given that the models use a diverse set of parameters, in order to enable an equitable comparison, parameters are carefully chosen as related to (a) characteristics of concrete, (b) characteristics of the FRP, and (c) characteristics related to concrete cover and epoxy mortar. The corresponding reliability and accuracy is also confirmed by comparing with test data. A comparison of some of the major models in this class with experimental data shows that the accuracy in prediction of Pmax and Le varies substantially with very few of the models actually incorporating the effects of critical bond parameters such as adhesive thickness and characteristics of the FRP–concrete interphase. Furthermore, the direct application of the results of these models into a sectional analysis provides an underestimation of the capacity of FRP-rehabilitated RC beams, with the exception of the ACI-440 approach which in most cases overpredicts results indicating its non-conservative nature. The use of procedures recommended in ACI-440 and as proposed herein are shown to provide a more accurate description, with the latter providing a means of determining the mode of failure through incorporation of the energetics of fracture interaction between cracking in concrete and redistribution of forces to the FRP. Critical aspects still needing study are also identified.

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Analysis of Bond and Debonding Behavior of Continuous Fiber Sheet Bonded on Concrete

Cited by 19 publications

References 0 publications

External Flexural Strengthening of Rc Beams Using BFRP Grids and PCM

External Flexural Strengthening of Rc Beams Using BFRP Grids and PCM

A Three-Parameter Bond Strength Model for FRP—Concrete Interface

Review and Comparison of Fracture Mechanics-based Bond Strength Models for FRP-strengthened Structures

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