Finite element parametric study of reinforced concrete beams shear-strengthened with embedded FRP bars

Qapo, Michael; Dirar, Samir; Jemaa, Yaser

doi:10.1016/j.compstruct.2016.04.017

Cited by 29 publications

(20 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Experimental and numerical studies on DE/ETS-strengthened RC beams have established the effectiveness of the method (Qin et al, 2015;Qapo et al 2016) and demonstrated its superiority over externally applied FRP shear strengthening techniques (Chaallal et al, 2011). Nonetheless, to date, there are no detailed studies on the seismic performance of shear-deficient RC BCJs strengthened with embedded bars.…”

Section: Introductionmentioning

confidence: 99%

Experimental Behavior and Design of Exterior Reinforced Concrete Beam-Column Joints Strengthened with Embedded Bars

et al. 2018

Self Cite

View full text Add to dashboard Cite

show abstract

Section: Introductionmentioning

confidence: 99%

Experimental Behavior and Design of Exterior Reinforced Concrete Beam-Column Joints Strengthened with Embedded Bars

et al. 2018

Self Cite

View full text Add to dashboard Cite

show abstract

“…Many experimental and numerical studies [9][10][11][12][13][14][15][16][17] proved the superiority of the DE method over other shear strengthening techniques in terms of the bond performance and shear strengthening effectiveness. For example, Chaallal et al [11] compared the shear strengthening effectiveness of DE FRP bars, near-surface mounted (NSM) FRP rods and externally bonded (EB) FRP sheets concluding that the shear strength capacity of the strengthened RC beams was increased by 61%, 31% and 23%, respectively.…”

Section: Introductionmentioning

confidence: 99%

Bond performance of deep embedment FRP bars epoxy-bonded into concrete

Caro

Jemaa

Dirar

et al. 2017

Engineering Structures

Self Cite

View full text Add to dashboard Cite

With increasing numbers of strength-deficient concrete infrastructure assets, strengthening and repair of concrete structures is becoming an issue of international importance. This study examines the bond behaviour of deep embedment (DE) glass fibre reinforced polymer (GFRP) and carbon FRP (CFRP) bars embedded into concrete prisms using an epoxy adhesive. The experimentally investigated parameters were the embedment length, FRP bar type and diameter, concrete compressive strength and hole diameter. The increase in embedded length enhanced the pull-out capacity for both GFRP and CFRP bar types. However, the bond strength and initial stiffness of the bond stress-slip curves decreased with the increase in embedded length. The specimens with DE CFRP bars had higher pull-out capacities and better bond performance than the corresponding specimens with DE GFRP bars. For the specimens with DE CFRP bars, the pull-out capacity increased with the increase in bar diameter and concrete strength but these two parameters did not affect the behaviour of the specimens with DE GFRP bars. The increase in hole diameter reduced the initial stiffness of the specimens with DE GFRP bars but affected neither the failure mode nor the failure loads. For the first time, this paper presents a mathematical 2 model for predicting the bond strength of DE FRP bars. The mathematical model was validated against experimental results and demonstrated to produce accurate predictions. It is envisaged that both the mathematical model and the experimental results will contribute to the development of future design guidelines for DE concrete shear strengthening.

show abstract

“…Despite their higher cost compared to steel, they are usually the preferred strengthening approach for long-term repair projects due to their superior characteristics listed above. This is while steel materials with proper corrosion treatment might be a better choice for short-term retrofit projects [19,[25][26][27][28][29][30][31][32]. Depending on the type of the matrix used, fiber-reinforced composites are categorized into three groups: polymeric composites, cement-based composites, and hybrid composites.…”

Section: Fiber-reinforced Composites (Since 1980s)mentioning

confidence: 99%

“…This is because the concrete core handles the stress transfer to the strengthening material, and compared to the concrete cover, it can provide better confinement, and thus improved bond behavior. Additionally, in this deep embedment technique, protection against fire and vandalism is even more effective than the NSM method [30,57]. Figure 3 shows an example application of the deep embedded reinforcement method for RC T-beams.…”

Section: Embedded Reinforcementmentioning

confidence: 99%

Synthesis of Repair Materials and Methods for Reinforced Concrete and Prestressed Bridge Girders

Ghaffary

Moustafa

2020

Materials

View full text Add to dashboard Cite

Bridge structures nationwide across the United States are aging and in need of repair or, in some cases, full replacement. Repair decisions are common among bridge owners because of the economic feasibility when compared to the higher cost of full replacement of damaged or deteriorated bridge components such as girders. Using a proper repair approach, as a long-term or just a short-term solution, can lead to benefits that could not be achieved otherwise such as considerable savings in both time and cost. Additionally, an appropriate repair approach can help avoid adverse environmental impacts, interruptions to service, overburdening of nearby infrastructure, and local opposition to construction. The main objective of this paper is to provide a synthesis of the repair methods and materials for reinforced concrete bridge girders proposed in research studies, i.e., state-of-the-art as well as state-of-the-practice established methods. Different steps in the general repair procedure are explained first. Next, a detailed description of three common bridge girder deficiencies, i.e., shear, flexural, and fire damage, is provided. For each damage type, the main causes and common solutions found in the literature are presented. The authors then provide specific recommendations to each repair procedure. This is intended to enable researchers, engineers, and decision makers to compare the available repair methods more conveniently to find the optimal repair approach for specific projects based on economic and environmental requirements as well as structural and construction conditions.

show abstract

Finite element parametric study of reinforced concrete beams shear-strengthened with embedded FRP bars

Cited by 29 publications

References 20 publications

Experimental Behavior and Design of Exterior Reinforced Concrete Beam-Column Joints Strengthened with Embedded Bars

Experimental Behavior and Design of Exterior Reinforced Concrete Beam-Column Joints Strengthened with Embedded Bars

Bond performance of deep embedment FRP bars epoxy-bonded into concrete

Synthesis of Repair Materials and Methods for Reinforced Concrete and Prestressed Bridge Girders

Contact Info

Product

Resources

About