Axial load behavior of circular and square concrete columns confined with sprayed fiber-reinforced polymer composites

Hussain, Qudeer; Rattanapitikon, Winyu; Pimanmas, Amorn

doi:10.1002/pc.23450

Cited by 27 publications

(15 citation statements)

References 24 publications

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“…However, the strain models of [49,72] predicted the strain values slightly closer to the experimental strain values with an AAE of 17.84% and 21.27%, respectively. Similarly, Table 12 and Figure 13c exemplifies that the strength model of [55] accurately predicts compressive strength for square columns. The models of [36,58] provide underestimation with an AAE of less than 20%.…”

mentioning

confidence: 52%

“…Supporting our results, Refs. [26,36,55] also reported this type of failure for different types of FRP confined square specimens. Figure 9 shows the failure modes of low-and high-strength square specimens.…”

Section: Square Columnsmentioning

confidence: 68%

“…For the specimen L-C-6J9P, having 15 layers of confinement with a thickness of 5.28 mm, the highest compressive stress of 161% and axial strain of 797% was achieved. Previous studies highlighted that the effectiveness of lateral wrapping with FRP is more significant in low-strength concrete columns as compared to high-strength concrete columns [55,56]. In the case of JPFRP-confined high-strength circular specimens, it is evident from Figure 9 and Table 6 that the enhancement in compressive strength and strain is higher in low-strength JPFRP-confined concrete columns.…”

Section: Circular Concrete Specimensmentioning

confidence: 85%

“…The selected stress-strain models for circular and non-circular columns are given in Tables 8 and 9, respectively. These include the models of [18,36,48,49,55,58,59,61,65,[68][69][70][71]. Huang et al [49] proposed a stress-strain model by using the experimental results obtained from circular polyester FRP-wrapped concrete specimens.…”

Section: Evaluation Of Strength and Strain Modelsmentioning

confidence: 99%

“…The majority of the existing strength and strain models derived for conventional FRP-jacketed concrete underestimated the compressive strength of the JPFRP-confined specimens. The best prediction of compressive strength was made by the models of [55,73]. However, the prediction of strain models was far from the experimental values.…”

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confidence: 99%

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Performance of Concrete Confined with a Jute–Polyester Hybrid Fiber Reinforced Polymer Composite: A Novel Strengthening Technique

Wahab

Srinophakun

Hussain³

et al. 2019

Fibers

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The strengthening and rehabilitation of concrete members is an important issue which arises worldwide. Carbon, aramid and glass fiber reinforced polymer (FRP) composites are mainly used for strengthening and rehabilitation. However, its use is limited on a small scale because of its high price, lack of availability and environmental impacts. The solution of this issue gives rise to the use of locally available natural fibers and low-cost synthetic fibers. This paper presents the experimental and analytical results of circular and square concrete columns confined with jute-polyester hybrid FRP composites. The main objective of this study is to evaluate the viability and performance of concrete confined with the hybridization of jute and polyester (FRP) composite sheets to utilize its superior properties. A novel hybrid technique has been applied for the wrapping of fiber sheets. The fiber sheets were applied in such a way that a uniform bond between the inner and outer layer was achieved. A total of 32 plain, standard size circular and square concrete specimens, externally wrapped with a jute-polyester FRP (JPFRP) composite, were tested under monotonic axial compressive loads. The result shows that JPFRP confinement increased the strength, strain and ductility index ranged between 1.24 and 2.61, 1.38 and 8.97, and 4.94 and 26.5 times the un-jacketed specimen, respectively. Furthermore, the wrapping has a significant effect on the low-strength specimens, having a circular cross-section. For high strength specimens, the post-peak stress-strain behavior was dominated by the outer polyester jacket because of its large rupture strain. Additionally, the test results were used to evaluate the existing strength-strain models derived for conventional FRPs. The models predicted values either underestimating or overestimating the compressive strength and strain of JPFRP-confined specimens. However, the strength models performed better than the strain models. The JPFRP wrapping significantly enhanced the strength, fracture energy, ductility index, and post-peak response. Therefore, JPFRP confinement can be used for a small-scale application, where little strength and high ductility is demanded. Moreover, it can be used to prevent the peeling of the concrete cover and moisture penetration into the concrete.

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mentioning

confidence: 52%

Section: Square Columnsmentioning

confidence: 68%

Section: Circular Concrete Specimensmentioning

confidence: 85%

Section: Evaluation Of Strength and Strain Modelsmentioning

confidence: 99%

mentioning

confidence: 99%

See 3 more Smart Citations

Performance of Concrete Confined with a Jute–Polyester Hybrid Fiber Reinforced Polymer Composite: A Novel Strengthening Technique

Wahab

Srinophakun

Hussain³

et al. 2019

Fibers

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The combined effects of wet–dry cycles and sustained load on the bond behavior of FRP–concrete interface

Liang

et al. 2018

Polymer Composites

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Effective bonding between the adherents plays a key point when dealing with the retrofit of concrete structures by using fiber-reinforced polymers (FRPs). However, lack of adequate studies on the long-term performance of the bond behavior of FRP-concrete interface under harsh environments will inhibit their application in the repair of aged structures. Therefore in this study, 60 double-lap shear-bonded FRPconcrete composite specimens were designed and tested under wet-dry cycles and sustained loading. The effect of FRP type (GFRP and CFRP), wet-dry cycling times (0-360 days) and sustained loading level (0-60% of the ultimate load of the control specimen) on the failure modes, stress transfer, and local bondslip curves of the composite specimens were investigated. The experimental results showed that wet-dry cycling exposure changed the failure mode of the composite specimens from the concrete substrate to the adhesive-concrete interface, further extended the local debonding area and decreased the ultimate strains of composite specimens from 12,000 to 8,000 lE. The degree of the degradation will be further increased under the combined effect of sustained loading and wet-dry exposure. The effects of FRP type, wet-dry cycling times and sustained loading level on the fracture energy of the specimens were quantitatively analyzed. A regression model was then proposed that was able to predict the fracture energy after environment exposure with reasonable accuracy, which can provide a reference for the design of bond durability factors in relevant specifications, such as ACI 440R-08 POLYM. COMPOS., 00:000-000,

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Protect aramid materials from UV‐induced damage by ANF and ANF/light stabilizer composites

et al. 2023

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Aramid materials have been applied in many important civil and military fields. But a major drawback to aramid materials is the susceptibility to UV‐induced damage. In this work, aramid nanofibers (ANFs) and ANF/nano‐ZnO composites were used to protect aramid materials from UV‐induced damage. ANF protective layer was created on the surface of aramid fibers, and the ANF‐coated aramid fibers could be further prepared to aramid paper. Moreover, ANF/nano‐ZnO composites were synthesized and used for stronger UV‐blocking ability. ANFs provided effective protection to aramid material. The properties after UV exposure (about 9.3 years in the natural environment) were largely improved: ANFs improved the retention rate of strength by 17.96% for aramid fibers and by 16.93% for aramid paper. ANFs also showed synergistic effect with UV‐absorbing inorganic nanoparticles. After UV exposure, the tensile strength of aramid paper with ANF/nano‐ZnO composites was even higher than the initial value (121.55%), and the retention rate of strength was 2.43 times higher than the original aramid paper.

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Axial load behavior of circular and square concrete columns confined with sprayed fiber-reinforced polymer composites

Cited by 27 publications

References 24 publications

Performance of Concrete Confined with a Jute–Polyester Hybrid Fiber Reinforced Polymer Composite: A Novel Strengthening Technique

Performance of Concrete Confined with a Jute–Polyester Hybrid Fiber Reinforced Polymer Composite: A Novel Strengthening Technique

The combined effects of wet–dry cycles and sustained load on the bond behavior of FRP–concrete interface

Protect aramid materials from UV‐induced damage by ANF and ANF/light stabilizer composites

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