Behavior of normal and high-strength concrete cylinders confined with E-glass/epoxy composite laminates

Almusallam, Tarek

doi:10.1016/j.compositesb.2006.06.021

Cited by 122 publications

(37 citation statements)

References 9 publications

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“…The tests conducted by Saatcioglu (2006, 2007) on large-scale HSCFFT columns have demonstrated the ability of these columns to exhibit highly ductile behavior under simulated seismic loading. However, research on the compressive behavior of FRP-confined HSC, in general, and on HSCFFT, in particular, has so far been extremely limited, with only a handful of studies reported on FRP-wrapped HSC cylinders (Rousakis 2001;Berthet et al 2005;Mandal et al 2005;Almusallam 2007;Eid et al 2009;Wu et al 2009;Cui and Sheikh 2010;Xiao et al 2010;Ozbakkaloglu and Akin 2011) and just one on FRP-wrapped HSC specimens with square cross-sections (Wang and Wu 2010). This review of the literature clearly demonstrates that the lack of experimental studies forms a major impediment to clear understanding of the axial compressive behavior of HSCFFTs.…”

Section: Introductionmentioning

confidence: 99%

Axial Compressive Behavior of Square and Rectangular High-Strength Concrete-Filled FRP Tubes

Ozbakkaloglu

2013

J. Compos. Constr.

144

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This paper presents results of an experimental study on the behavior of square and rectangular high-strength concrete (HSC)-filled fiber reinforced polymer (FRP) tubes (HSCFFTs) under concentric compression. The effects of the tube thickness, sectional aspect ratio and corner radius on the axial compressive behavior of concrete-filled FRP tubes (CFFTs) were investigated experimentally through the tests of 24 CFFTs that were manufactured using unidirectional carbon fiber sheets and high-strength concrete (HSC) with 78 MPa average compressive strength. As the first experimental investigation on the axial compressive behavior of square and rectangular HSCFFTs, the results of the study reported herein allows a number of significant conclusions to be drawn. First and foremost, test results indicate that sufficiently confined square and rectangular HSCFFTs can exhibit highly ductile behavior. The results also indicate that confinement effectiveness of FRP tubes increases with an increase in corner radius and decreases with an increase in sectional aspect ratio. It is also observed and discussed that HSCFFTs having tubes of low confinement effectiveness may experience a significant strength loss at the point of transition on their stress-strain curves. Furthermore, it is found that the behavior of HSCFFTs at this region differ from that of normal-strength CFFTs and it is more sensitive to the effectiveness of confining tube. Examination of the test results have also lead to a number of important observations on the influence of the key confinement parameters on the development and distribution of the hoop strains on the tubes of CFFTs, which are presented and discussed in the paper.

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Section: Introductionmentioning

confidence: 99%

Axial Compressive Behavior of Square and Rectangular High-Strength Concrete-Filled FRP Tubes

Ozbakkaloglu

2013

J. Compos. Constr.

144

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“…The current database [1,[4][5][6][7][8]11,12,[21][22][23]41,42,[49][50][51][52][53][54][55][56][57][58][59][60][61][62][63] composed of n = 198 averaged data was updated with n = 40 data [9,10,[22][23][24][25][26]35,64] from the recent literature on HSC, UHSC, and UHPC for the FRP sheet types mentioned above. Meanwhile, UHSC and UHPC strength data in the literature are available up to 113.6 and 188 MPa, respectively.…”

Section: Reference Failure Criterion For Rock Modified Form For Frp Cmentioning

confidence: 99%

A Design-Oriented Combined Model (7 MPa to 190 MPa) for FRP-Confined Circular Short Columns

Girgin

2015

Polymers

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This study addresses a design oriented combined model to predict the ultimate strengths and ultimate strains in an extensive range of unconfined strength (7 to 190 MPa) for the axially loaded fiber-reinforced polymer (FRP)-wrapped circular short columns. Modified Hoek-Brown strength criterion, which was previously extended to FRP-confined concrete from 7 to 108 MPa, is revisited and verified. An empirical strength model beyond 108 MPa encompassing ultra-high strength concrete (UHSC) and ultra-high performance concrete (UHPC) data, as well as empirical strain models, are defined to accomplish the design oriented combined model. This article especially focuses on the verification of the proposed strain models. The assessment performances of those models for carbon FRP (CFRP) and glass FRP (GFRP) confinement are compared with specific models in the current literature. Strength and strain predictions for UHSC and UHPC are integrated into the design oriented combined model as well. The assessments on this model agree with the experimental results in high accuracy.

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“…Confinement studies of high-resistance concretes have also been published (20)(21)(22)(23). It has been found that confinement effect is greater when concrete strength is lower (24)(25)(26)(27) and that cyclic testing reduces rigidity (28)(29)(30)(31)(32)(33). However, confinement in low-resistance concretes has not been sufficiently studied.…”

Section: Introductionmentioning

confidence: 99%

Compressive strength behaviour of low- and medium-strength concrete specimens confined with carbon fibres in defective implementation conditions: an experimental study

et al. 2016

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This behaviour of low-and medium-strength concrete specimens confined with carbon fibrereinforced polymer (CFRP) was analysed in three loading cycles. In some cases, stress levels were achieved that produced intemal microcracks, which allowed residual rigidity and the behaviour of completely microcraked concrete specimens to be studied. The specimens were subsequently tested to compression to the fracture point. Specimens reinforced in accordance with no manufacturing defects (100% CFRP reinforcement) and major manufacturing defects (50% CFRP reinforcement) were assessed for effectiveness and behaviour of the confined elements in less than ideal conditions. Results show that confinement was higher in lowresistance concretes, that the behaviour of reinforced specimens was unaffected by defective implementation conditions and that the reinforced specimens were less rigid than the non-reinforced specimens when tested up to 40% of ultimate fracture strength. RESUMEN: Estudio experimental del comportamiento a compresión de probetas de hormigón de resistencias bajas y medias confinadas con tejidos de fibras de carbono y con defectos muy importantes de ejecución.En este trabajo se estudia el comportamiento de hormigones de resistencias bajas y medias confinados con CFRP. Se han realizado 3 ciclos de carga llegando en algunos casos a niveles de tensión que han microfisurado internamente el hormigón, lo que ha permitido estudiar la rigidez residual y el comportamiento de probetas confinadas con el hormigón totalmente microfisurado. Posteriormente todas las probetas se han ensayado a compresión hasta rotura. Los refuerzos se han realizado con buenas condiciones de ejecución y simulando grandes defectos para poder evaluar la eficacia de los elementos confinados cuando las condiciones de ejecución no son las correctas. Los resultados muestran que el efecto de confinamiento es superior en hormigones poco resistentes, el comportamiento de las probetas reforzadas es poco sensible a grandes defectos de ejecución y su rigidez es inferior al de las probetas originales cuando se ensayan hasta el 40% de la tensión de rotura.

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Behavior of normal and high-strength concrete cylinders confined with E-glass/epoxy composite laminates

Cited by 122 publications

References 9 publications

Axial Compressive Behavior of Square and Rectangular High-Strength Concrete-Filled FRP Tubes

Axial Compressive Behavior of Square and Rectangular High-Strength Concrete-Filled FRP Tubes

A Design-Oriented Combined Model (7 MPa to 190 MPa) for FRP-Confined Circular Short Columns

Compressive strength behaviour of low- and medium-strength concrete specimens confined with carbon fibres in defective implementation conditions: an experimental study

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