Experimental analysis of reinforced concrete shear deficient beams with circular web openings strengthened by CFRP composite

Aksoylu, Ceyhun; Yazman, Şakir; Özkılıç, Yasin Onuralp; Gemi, Lokman; Arslan, Musa Hakan

doi:10.1016/j.compstruct.2020.112561

Cited by 73 publications

(39 citation statements)

References 49 publications

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“…It can seen from these figures that both analytical and finite element (FE) results can successful predict the elastic region of the pultruded GFRP. The composite structures produced in different production methods and geometries are subjected to damage analysis after the experimental study [28][29][30][31][32][33]. Each type of composite materials has their own unique damages.…”

Section: Fig 4 Numerical Model 5 Resultsmentioning

confidence: 99%

An Investigation on Static Analysis of Pultruded GFRP Composite Beams

Madenci

Özkılıç

Gemi

2020

Academic Platform Journal of Engineering and Science

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Composite materials, which have been used especially in the construction sector to strength beams and columns, have been produced in pultruded GFRP profiles with different geometries with the pultrusion method. Pultruded GFRP profiles are an alternative to traditional building elements in many construction applications thanks to their superior properties such as high strength, chemical resistance, thermal and electrical insulation. Pultruded GFRP profiles are exposed to various loads and change shapes due to the effect of these loads. It is very important to determine the load and deformation capacities as structural members. These profiles are often exposed to bending while serving as beams. In this study, a multiscale analysis of the deflection and stress behavior of pultruded GFRP composite beam is presented. The proposed formulations are verified using the results of experimental and numerical studies. The comparison of the analytical results to both experimental and finite element results revealed that the differences between analytical results and the experimental and numerical findings are less than 1%, which indicates an excellent agreement.

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Section: Fig 4 Numerical Model 5 Resultsmentioning

confidence: 99%

An Investigation on Static Analysis of Pultruded GFRP Composite Beams

Madenci

Özkılıç

Gemi

2020

Academic Platform Journal of Engineering and Science

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“…A total of 24 experimental studies on the behaviour of RC beams with an FRP-strengthened web opening have been found in the published literature (Abdalla et al, 2003; Abdel-Kareem 2014; Aksoylu et al, 2020; Allam, 2005; Allawi et al, 2020; Almusallam et al, 2018; Arabzadeh and Karimizadeh, 2019; Chin et al, 2012, 2016; Elsanadedy et al, 2019; Hemzah et al, 2020; Hussain and Pimanmas, 2015; Lu et al, 2015; Maaddawy and Ariss, 2012; Maaddawy and Sherif, 2009; Makki et al, 2019; Mansur et al, 1999; Nie et al, 2018, 2020a; Osman et al, 2017b; Pimanmas, 2010; Rahim et al, 2020; Salih et al, 2020; Teng et al, 2013b). The first of these studies was conducted by Mansur et al (1999), in which three RC T-section beams were tested with only one parameter examined (i.e.…”

Section: Existing Experimental Studiesmentioning

confidence: 99%

“…Maaddawy and Ariss, 2012), as shown in Figure 2(a); while the others exhibited a flexural failure mode due to the crushing of compressive concrete at the mid-span of the beam (e.g. Aksoylu et al, 2020) [as shown in Figure 2(b)] or the formation of four plastic hinges at the two ends of the top and bottom chords (Nie et al 2018, 2020a) [as shown in Figure 2(c)]. 4 A web opening/web openings reduced significantly both the load-carrying capacity and stiffness of the beam; after FRP-strengthening, the weakening effect of the web opening can be substantially compensated.…”

Section: Existing Experimental Studiesmentioning

confidence: 99%

A review on the behaviour of reinforced concrete beams with fibre-reinforced polymer-strengthened web openings

Nie

Zhang

Gao

et al. 2021

Advances in Structural Engineering

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Web openings often need to be created in reinforced concrete (RC) beams for the passages of utility ducts and/or pipes. Such web openings reduce the cross-section area of the beam in the affected region, leading to decrease in its load-carrying capacity and stiffness. Therefore, a fibre-reinforced polymer (FRP)-strengthening system generally needs to be applied around the web opening to ensure the safety of the weakened beam. A number of studies have been conducted by researchers all over the world to examine the behaviour of RC beams with FRP-strengthened web opening/web openings, and plenty of useful findings have been generated. This article presents a critical literature review of existing relevant research from three aspects: experimental studies, numerical studies and theoretical studies. The effect of main factors, including the size, shape, location and number of the web opening, the shape and shear span ratio of the beam, the concrete strength, the loading scheme and the FRP-strengthening scheme, on the structural performance of RC beams with FRP-strengthened web opening/web openings have been thoroughly analysed and discussed. Finally, directions for future research based on the gaps which exist in existing studies are pointed out.

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“…Over the past few decades, compared to traditional monolithic materials, polymer-based composite materials have been attracted attentions in many engineering fields with their superior properties such as higher specific strength/stiffness , Bozkurt 2017, Oğuz et al 2020, Özütok and Madenci 2017, fatigue life (Roundi et al 2017), resistance to corrosion (Kumar et al 2019 and good thermal insulation (Yasir et al 2018), and have been extensively used in a wide range of lightweight members with high load-carrying capacity for various engineering applications like construction, aerospace and automotive in recent years (Khosravi and Eslami-Farsani 2016, Uslu et al 2021, Özbek 2020, Bulut et al 2017, Aksoylu et al 2020, Madenci and Özütok 2020, Özkılıç et al 2021. Moreover, the superior dynamic performance of polymer-based composites widen their popularity for the structural applications such as space shuttles, aircrafts, marine vessels, vehicles, etc (Draiche et al 2014, Qatu et al 2010) that subjected to vibratory loads in service conditions.…”

Section: Introductionmentioning

confidence: 99%

Effect of Cut-outs on the Free Vibration Response of Basalt/Carbon Hybrid Composites

Özbek¹,

Bozkurt²

2021

Afyon Kocatepe University Journal of Sciences and Engineering

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The current work deals with an experimental investigation about the influence of cut-outs on dynamic characteristics of basalt/carbon hybrid fiber reinforced composite laminates. The composite samples have been fabricated via vacuum assisted resin transfer molding technique and cut-outs in the form of triangular, square and circular shapes with equal areas have been processed on them to systematically analyze the influences of cut-outs. The dynamic characteristics of the samples have been examined by conducting free vibration-damping tests and expressed in terms of natural frequency and damping ratio using the frequency response and time-acceleration response. The results show that the damping characteristics of the composite samples can be remarkably improved with the help of cut-outs which provide improvements approximately between 2.41% and 16.65% in damping ratio values. The maximum and minimum variations in damping ratio have observed for non-hybrid carbon fiber reinforced composite samples with triangular cut-out (T-C6) and hybrid basalt/carbon fiber reinforced composite samples with circular cut-out (C-B6), respectively. On the other hand, the presence of cutouts have led to decreases in natural frequency values as a result of reduction in stiffness caused by the cut-outs. This point out that employment of cut-outs can be a promising application to meet the natural frequency requirements of engineering systems constructed with hybrid fiber reinforced composite laminates.

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Experimental analysis of reinforced concrete shear deficient beams with circular web openings strengthened by CFRP composite

Cited by 73 publications

References 49 publications

An Investigation on Static Analysis of Pultruded GFRP Composite Beams

An Investigation on Static Analysis of Pultruded GFRP Composite Beams

A review on the behaviour of reinforced concrete beams with fibre-reinforced polymer-strengthened web openings

Effect of Cut-outs on the Free Vibration Response of Basalt/Carbon Hybrid Composites

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