Compressive behavior of CFRP-confined post heated square CFST stub columns

Chen, Yu; Wang, Kai; He, Kang; Wei, Jiangang; Wan, Jun

doi:10.1016/j.tws.2018.02.012

Cited by 30 publications

(8 citation statements)

References 24 publications

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“…In recent years, with the reduction of cost, carbon fiber has also been widely used in the construction engineering industry (Chen et al, 2018). As a derivative of carbon fiber, carbon fiber polymer reinforcement (CFRP) is often used in the reinforcement of building structures (Liang et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

“…Zhang et al (2019) carried out axial compression test research on eight concrete-filled steel tubular short columns strengthened with CFRP with spherical crown void defects. Chen et al (2018) carried out the axial compression test of square concrete-filled steel tubular short columns after CFRP restraint heating. Based on the regression of test data, a simplified formula for the ultimate strength of concrete-filled square steel tubular short columns after CFRP confined heating is proposed.…”

Section: Introductionmentioning

confidence: 99%

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Static Behavior of Circular Section CFRP Concrete-Filled Steel Tubes Under Compressive–Torsional Load

2022

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In order to study the compressive torsional behavior of concrete-filled CFRP steel tubes (CF-CFRP-STs), the static test of eight circular section CF-CFRP-ST compression torsional specimens was carried out. The characteristics of the torque–angle (T–θ) curve and shear stress shear–strain (τ–γ) curve, failure mode, cooperative work between steel tubes and CFRP, and cross-section assumption were studied. The T–θ curve, τ–γ curve, and failure mode of the specimen are simulated by ABAQUS. Based on the above research, the stress distribution of each component material is analyzed. The effects of transverse CFRP layers, material strength, steel ratio, and axial compression ratio on the static performance of members are discussed. Based on the performance analysis, the bearing capacity equation of CF-CFRP-ST compression-torsional members is proposed.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Static Behavior of Circular Section CFRP Concrete-Filled Steel Tubes Under Compressive–Torsional Load

2022

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“…With the gradual application of composite columns in high-rise buildings, the mechanical properties of square and rectangular concrete-filled steel tubular (RCFST) columns, such as the interfacial bond strength, axial compression bearing capacity and compression–bending bearing capacity, have been studied in depth both experimentally and numerically by numerous researchers (Alam et al, 2016; Chen et al, 2018; Katwal et al, 2017; Liao et al, 2013; Prabhu et al, 2015; Qian et al, 2016; Qu et al, 2014; Ren et al, 2017; Sakino et al, 2004; Shakir-Khalil and Mouli, 1990; Shakir-Khalil and Zeghiche, 1994; Srinivasan, 1998; Wang et al, 2019; Yang et al, 2008). The behaviour of concrete-filled steel tubular (CFST) columns can be approximated using a numerical analysis method, and a reasonable material model is key to ensuring an approximate finite element model (FEM).…”

Section: Introductionmentioning

confidence: 99%

Axial compressive behaviour of concrete-filled steel tubular columns with interfacial damage

Huang

Sun

et al. 2019

Advances in Structural Engineering

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In a previous study, 17 rectangular concrete-filled steel tubular columns were tested using a push-out test method to examine the interfacial bond behaviour. In this study, these specimens were subjected to axial compressive tests to study the effects of interfacial damage on the ultimate axial compressive capacity. The variations in both the load–axial displacement curves and load–strain curves were recorded and then compared to study the influences of both the steel tube fabrication method and the D/ B ratio on the axial load–carrying capacity. The axial compressive behaviour of rectangular concrete-filled steel tubular columns with no interfacial damage was then studied using a numerical analysis method. The contact stress distribution along the length and width of the face and at the height of the interface was obtained and discussed. In addition, the ultimate axial compressive capacity of rectangular concrete-filled steel tubular columns with no interfacial damage was calculated using the formulas from three international codes. The influence of interfacial damage on the axial compressive bearing capacity of a rectangular concrete-filled steel tubular column was discussed through a comparison of the results of the numerical simulation, formula calculation and experiments. The influence of the interfacial gaps caused by the push-out tests on the axial bearing capacity of the concrete-filled steel tubular columns can be ignored, because the core concrete was not destroyed and the outside steel tube can provide a sufficient constraint force on the concrete when the two materials yielded. Finally, the influences of the gap type and size on the bearing capacity were discussed.

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“…Nowadays, one of the materials that is usually considered for strengthening structures before, during and after exposing to the fire is fiber. Also, fibers may be used as a reinforcer material on the outer surface of steel structures (Keykha et al, 2015;Keykha et al, 2016;Keykha, 2017aKeykha, , 2017bKeykha, , 2017cKeykha, , 2017dKeykha, , 2018aKeykha, , 2018bChen et al, 2018) and concrete (Lenwari et al, 2016;Al-Kamaki et al, 2015;Trapko, 2013;Yaqub and Bailey, 2011;El-Gamal, 2014) to increase the performance of these structures. Many properties of concrete are increased with the application of fiber materials, including mechanical properties and others.…”

Section: Introductionmentioning

confidence: 99%

Experimental investigation on the compressive strength of PFGP-covered concretes exposed to high temperature

Keykha

2019

JSFE

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Purpose This study aims to investigate the effect of high temperature (600°C) on the compressive strength of concrete covered with a mixture of polypropylene fiber and gypsum plaster (PFGP). Design/methodology/approach To study the compressive strength of concrete specimens exposed to temperature, 16 cubic specimens (size: 150 mm × 150 mm × 150 mm) were made. After 28 days of processing and gaining the required strength of specimens, first, polypropylene fiber was mixed with gypsum plaster (CaSO4.2H2O) and then the concrete specimens were covered with this mixture. To cover the concrete specimens with the PFGP, the used PFGP thickness was 15 mm or 25 mm. The polypropylene rates mixed with the gypsum plaster were 1, 3 and 5 per cent. A total of 14 specimens, 12 of which were covered with PFGP, were exposed to high temperature in two target times of 90 and 180 min. Findings The results show that the PFGP as covering materials can improve the compressive strength lost because of the heating of the concrete specimens. The results also show that the presence of polypropylene fiber in gypsum plaster has the effect on the compressive strength lost because of the heating of the PFGP-covered concrete. The cover of PFGP having 3 per cent polypropylene fiber had the best effect on remained strength of the specimens. Originality/value The cover of PFGP having 3 per cent polypropylene fiber has the best effect on remained strength of the PFGP covered specimens exposed to temperature.

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Compressive behavior of CFRP-confined post heated square CFST stub columns

Cited by 30 publications

References 24 publications

Static Behavior of Circular Section CFRP Concrete-Filled Steel Tubes Under Compressive–Torsional Load

Static Behavior of Circular Section CFRP Concrete-Filled Steel Tubes Under Compressive–Torsional Load

Axial compressive behaviour of concrete-filled steel tubular columns with interfacial damage

Experimental investigation on the compressive strength of PFGP-covered concretes exposed to high temperature

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