FRCM Strengthening of Shear-Critical RC Beams

Azam, Rizwan; Soudki, Khaled

doi:10.1061/(asce)cc.1943-5614.0000464

Cited by 92 publications

(25 citation statements)

References 14 publications

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“…A more detailed description of this phenomenon is presented in Section 2.3. configurations or continuous U-jackets with (26%) or without anchors (17%) configurations. Comparing the 6 additional shear strength VFRCM relative to VCON for these two configurations, although slightly higher values of VFRCM/VCON are related to the U-continuous configuration, it is not possible to conclude that using this configuration will guarantee a better performance of the strengthened beam, which agrees with [15] who concluded that side bonded and U-wrapped configurations showed similar performance in terms of strength. In side bonded configurations detachment of the FRCM composite was less frequently observed, while for Uwrapped configuration most failures were accompanied by composite detachment, either at the compositesubstrate interface or within the substrate.…”

Section: Evaluation Of the Database And Distribution Of Datasupporting

confidence: 52%

State of research on shear strengthening of RC beams with FRCM composites

González-Libreros

Sabău

Sneed

et al. 2017

Construction and Building Materials

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This paper summarizes the state of research on the topic of shear strengthening of RC beams using exter- nally bonded FRCM composites. In the first part of this paper, a detailed bibliographical review of the lit- erature on the shear strengthening of RC beams using FRCM composites is carried out, and a database of experimental tests is developed. Analysis of the database shows that FRCM composites are able to increase the shear strength of RC beams. The effectiveness of the strengthening system appears to be influenced by parameters including the wrapping configuration, matrix compressive strength relative to the concrete compressive strength, and axial rigidity of the fibers. Different failure modes have been reported, including fracture of the fibers, detachment of the FRCM jacket (with or without concrete attached), and slippage of the fibers through the mortar. A possible interaction between the internal transverse steel reinforcement and the FRCM system has also been observed. In the second part of this paper, four design models proposed to predict the contribution of the FRCM composite to the shear strength of RC beams are assessed using the database developed. Results show that the use of the prop- erties of the FRCM composite in Models 3 and 4 instead of the fiber mechanical characteristics does not significantly increase the accuracy of the models. A simple formulation such as that proposed by Model 1, based on the bare fiber properties, is found to be more accurate for beams with or without composite detachment

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Section: Evaluation Of the Database And Distribution Of Datasupporting

confidence: 52%

State of research on shear strengthening of RC beams with FRCM composites

González-Libreros

Sabău

Sneed

et al. 2017

Construction and Building Materials

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“…Results. The performance of the proposed model was evaluated through a comparison between the numerically predicted values and existing experimental results [4,10,11,14]. The geometry and material properties of RC beam specimens of the existing tests are presented in Table 7.…”

Section: Comparison Between the Proposed Model And Existing Experimentalmentioning

confidence: 99%

“…On this basis, FRP has been applied for strengthening RC structures in various forms such as sheets, plates, and strips since the early 1990s [3]. Many studies on FRP have validated the effectiveness of its use as a strengthening material [4]. However, FRP is accompanied by several distinct disadvantages.…”

Section: Introductionmentioning

confidence: 99%

Shear Strengthening Performance of Hybrid FRP-FRCM

Jung

Hong

Han

et al. 2015

Advances in Materials Science and Engineering

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The effectiveness of a hybrid fiber reinforced polymer- (FRP-) fabric reinforced cementitious matrix (FRCM) for shear strengthening was investigated though an experimental study. FRP materials of FRCM are usually fabricated in the form of a fabric to enhance the bond strength between the FRP material and the cementitious matrix. The hybrid FRP fabric used in this study consisted of carbon FRP (CFRP) and glass FRP (GFRP) in warp and weft directions, respectively. A total of 11 beams were fabricated and 8 beams among them were strengthened in shear with externally bonded hybrid FRP-FRCM. The number of plies, the bond types, and the spacing of the hybrid FRP fabric were considered as experimental variables. Additionally, a shear capacity model for a FRCM shear strengthened beam was proposed. The values predicted by the proposed model were compared with those by the ACI 549 code and test results. It was confirmed from the comparison that the proposed model predicted the shear strengthening performance of the hybrid FRP-FRCM more reliably than the ACI 549 code did.

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“…Furthermore, the specimens strengthened with FRCM were destroyed due to the loss of reinforcing effect caused by peeling of the FCRM composite [11]. Azam and Soudki [15] conducted an experimental study to investigate the strengthening performance of beams strengthened in shear with the FRCM method.…”

Section: Introductionmentioning

confidence: 99%

“…Experimental results showed that the ultimate load increase of 19% to 105% from the type of fibers and strengthening type has no significant effect on failure mode and failure load of the specimen [15]. Jung et al [16] conducted flexural tests on FRCM-reinforced beams by varying the type of fabric and the number of fabric layers.…”

Section: Introductionmentioning

confidence: 99%

Flexural Behavior of RC Slabs Strengthened in Flexure with Basalt Fabric‐Reinforced Cementitious Matrix

Lee

Hong

Yeon

et al. 2018

Advances in Materials Science and Engineering

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is paper presents both experimental and analytical research results for predicting the flexural capacity of reinforced concrete (RC) slabs strengthened in flexure with basalt fabric-reinforced cementitious matrix (FRCM). A total of 13 specimens were fabricated to evaluate the flexural behavior of RC slabs strengthened with basalt FRCM composite and were tested under fourpoint loading.e fiber type, tensile reinforcement ratio, and the number of fabric layers were chosen as experimental variables. e maximum load of FRCM-strengthened specimens increased from 11.2% to 98.2% relative to the reference specimens. e energy ratio and ductility of the FRCM-strengthened specimens decreased with the higher amount of fabric and tensile reinforcement. e effective stress level of FRCM fabric can be accurately predicted by a bond strength of ACI 549 and Jung's model.

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FRCM Strengthening of Shear-Critical RC Beams

Cited by 92 publications

References 14 publications

State of research on shear strengthening of RC beams with FRCM composites

State of research on shear strengthening of RC beams with FRCM composites

Shear Strengthening Performance of Hybrid FRP-FRCM

Flexural Behavior of RC Slabs Strengthened in Flexure with Basalt Fabric‐Reinforced Cementitious Matrix

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