An experimental study on sag-resistance ability and applicability of sprayed FRP system on vertical and overhead concrete surfaces

Ha, S.K.; Na, S.; Bang, Young-Tae; Lee, Haeng‐Ki

doi:10.1617/s11527-013-0165-7

Cited by 13 publications

(4 citation statements)

References 14 publications

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“…In the past, several studies on the material performance of sprayed FRP and sprayed FRP used in the reinforcement of concrete beams, columns, and masonry walls have been conducted [14][15][16][17][18][19][20][21][22]. e studies show that the sprayed FRP strengthening technology has good reinforcement effect and is very convenient for construction.…”

Section: Introductionmentioning

confidence: 99%

Study of Seismic Behavior of RC Beam‐Column Joints Strengthened by Sprayed FRP

Zhao

Liu

2018

Advances in Materials Science and Engineering

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To study the seismic behavior of RC beam-column joints strengthened with sprayed FRP, five 1 : 2 reduced-scale specimens of joints were tested through quasi-static experiments. e failure modes, hysteretic curves, skeleton curves, strength, deformation, degradation of strength and stiffness, ductility, and energy dissipation capacity were studied. Furthermore, the effect of three main influencing factors including the sprayed FRP thickness, strengthened area, and axial compression ratio was analyzed in this paper as well. e results show that sprayed FRP strengthening can improve the seismic behavior of RC beam-column joints effectively.e increase of sprayed FRP thickness can lead to a better seismic performance for the joints. Strengthening area can affect the bearing capacity obviously. Higher axial compression ratio can increase the bearing capacity and initial stiffness, but it can make the deformation capacity and ductility decreased. e study can provide references to further research on the sprayed FRP material for strengthening of RC beam-column joints.

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Section: Introductionmentioning

confidence: 99%

Study of Seismic Behavior of RC Beam‐Column Joints Strengthened by Sprayed FRP

Zhao

Liu

2018

Advances in Materials Science and Engineering

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“…Fiber spraying is used in large scale especially for glass fiber reinforced plastics. Due to the continued importance of this manufacturing process, research continues on sprayed glass, 29–54 carbon, 52–65 or natural 66–74 short fiber‐reinforced plastics. In this process, the fibers are cut in a cutting unit and sprayed mostly randomly or by using special fiber feed units, aligned 29–34,54–58,74 on a mold.…”

Section: Introductionmentioning

confidence: 99%

Short fiber spraying process of all‐oxide ceramic matrix composites: A parameter study

Winkelbauer

Puchas

Krenkel

et al. 2022

Int J Applied Ceramic Tech

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Fiber spraying processes have been established for polymer matrix composites for decades. In this study, we transferred an automated fiber spraying process to short fiber bundle‐reinforced Nextel 610/ Al2O3‐ZrO2 oxide fiber composites (SF‐OFC). The effect of the processing factors travel height, spray angle, and movement speed on the specimen strength was analyzed in a full factorial experimental design. As a result, the significance of the travel height as well as the interaction between travel height and movement speed was demonstrated. Furthermore, the influence of the fiber length (14, 28, 56, and 112 mm) on the bending stress and strain was investigated. Independent of the used fiber length, the SF‐OFC exhibited an excellent quasi‐ductile fracture behavior with bending strains in the range of .6% and in‐plane isotropic material properties. The average bending strength increased from 133 ± 27 MPa with 14 mm fiber reinforcements to 163 ± 29 MPa with 112 mm fibers. The achieved bending strengths clearly exceeded the off‐axis properties of currently used fabric‐reinforced OFC. These properties, combined with the excellent drapability and cost effectiveness, make the novel material highly promising for industrial applications such as flame tubes, burner nozzles, kiln furnitures, or foundry components.

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“…Recent studies of SFRP in the field of civil engineering are intensively focused on overcoming the identified obstacles which hinder the broad application of this technique. These studies are not limited to, but those deserve to be highlighted may include development of advanced spray multiple layup process for quality control of SFRP composite (Ha et al, 2015a), and improving the sag-resistance of SFRP system (Ha et al, 2015b). The spray multiple layup process proposed by Ha et al (2015a) ensures the quality of the SFRP composites, i.e.…”

Section: Introductionmentioning

confidence: 99%

“…consistent thickness and volume fractions of the fibers (Ha et al, 2015a). Moreover, the aspect of SFRP for practical applications in light of strengthening RC structures was thoroughly explored by assessing the sag-resistance (Ha et al, 2015b(Ha et al, , 2015c and bonding characteristic of SFRP composites from concrete (Ha et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Structural strengthening and damage behaviors of hybrid sprayed fiber-reinforced polymer composites containing carbon fiber cores

Park

Yang

Kim

et al. 2016

International Journal of Damage Mechanics

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Recently, composite materials of a hybrid strategy are being developed to reduce the vulnerability of partial rupture failure. Simultaneously, the demand of a modelling method particularly for simulating the behavior of these materials is also emerging. This paper presents novel hybrid sprayed fiber-reinforced polymer composites containing carbon fiber cores developed for strengthening reinforced concrete structures, and a theoretical approach to model these materials. A micromechanical formulation that accounts for the hybrid characteristic of the composites was proposed to predict the overall performance of the composites. The derived model was then implemented into the nonlinear finite element codes to predict the structural behavior of the reinforced concrete beams retrofitted with the composites subjected to loading. A series of three-point bending tests of specimens were carried out to validate the predictability of the modeling technique. The obtained test results were comparatively explored with discussions of the theoretical approaches.

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An experimental study on sag-resistance ability and applicability of sprayed FRP system on vertical and overhead concrete surfaces

Cited by 13 publications

References 14 publications

Study of Seismic Behavior of RC Beam‐Column Joints Strengthened by Sprayed FRP

Study of Seismic Behavior of RC Beam‐Column Joints Strengthened by Sprayed FRP

Short fiber spraying process of all‐oxide ceramic matrix composites: A parameter study

Structural strengthening and damage behaviors of hybrid sprayed fiber-reinforced polymer composites containing carbon fiber cores

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