Flexural behavior of concrete-filled SHS and RHS aluminum alloy tubes strengthened with CFRP

Zhu, Yao; Chen, Yu; He, Kang; Ruan, Feng; Zhang, Xiaoyong; Zhu, Qingxia; Tang, Chao

doi:10.1016/j.compstruct.2020.111975

Cited by 19 publications

(4 citation statements)

References 28 publications

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“…2. Aluminium-concrete columns [37,38,41,42,46] The square or rectangular cross-sections demonstrate some loss of the confinement effect compared to circular cross-sections [40]. Furthermore, square or rectangular aluminium tubes may split near their corners and cause the failure of columns [41], whereas the splitting of the circular aluminium tubes is unlikely [42].…”

Section: Aluminium-concrete Composite Structuresmentioning

confidence: 99%

“…Concrete-filled aluminium tubes may be reinforced at their exterior walls with carbon fibre-reinforced polymer to delay the outward local buckling of aluminium tubes [46]. The analysed aluminium-concrete composite columns did not have connectors at the interface of aluminium alloy and concrete because, similarly to steel-concrete composite columns subjected to compression [47], the connection between these two materials was achieved through the natural bond between them.…”

Section: Aluminium-concrete Composite Structuresmentioning

confidence: 99%

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Aluminium members in composite structures – a review

Chybiński,

Polus,

Szumigała

2022

Archives of Civil Engineering

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This paper presents a review of composite structures in which aluminium alloys are used. Current trends in the research of composite structures with aluminium girders and their possible applications in structural engineering were shown. In the presented solutions, advantageous properties of aluminium alloys were exploited, such as high strength-to-weight ratio, corrosion resistance and recyclability. The authors demonstrated the structural behaviour of aluminium-concrete and aluminiumtimber composite beams based on their own tests as well as investigations presented in the literature. Furthermore, aluminium-concrete composite columns, a composite mullion made of an aluminium alloy and timber, and a military bridge consisting of aluminium truss components, a stay-in-place-form, reinforcement and concrete were presented. In addition to the description of the structural elements, the main conclusions from their experimental, theoretical and numerical analyses were also demonstrated in this paper. The connection of aluminium girders with concrete or timber slabs provided for the increase of the load-bearing capacity and stiffness, and it eliminated the problem of local buckling in girder flanges and lateral-torsional buckling of girders in the analysed solutions.

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Section: Aluminium-concrete Composite Structuresmentioning

confidence: 99%

Section: Aluminium-concrete Composite Structuresmentioning

confidence: 99%

Aluminium members in composite structures – a review

Chybiński,

Polus,

Szumigała

2022

Archives of Civil Engineering

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“…However, the CFRP aluminum alloy composite tube concrete composite component can significantly improve the stability and bearing capacity of aluminum alloy tubes. Zhu et al [ 19 ] conducted bending performance tests and numerical simulations on square and rectangular CFRP aluminum alloy composite tube concrete components. Their results demonstrated that components wrapped with CFRP on all four sides exhibited higher bending stiffness and bearing capacity, and CFRP effectively delayed the occurrence of convex buckling of aluminum alloy tubes.…”

Section: Introductionmentioning

confidence: 99%

Experimental study and numerical analysis on axial compression of round-ended concrete filled CFRP-aluminum tube columns

Wang,

Tang,

Qiu

et al. 2023

PLoS ONE

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To enhance the concrete confinement ability of circular-ended aluminum alloy tubes, carbon fiber reinforced polymer (CFRP) was bonded onto the tube surface to form CFRP confined concrete columns with circular ends (RCFCAT). Eight specimens were designed with number of CFRP layers and section aspect ratio as variables. Axial loading test and finite element analysis were carried out. Results showed CFRP delayed buckling of the aluminum alloy tube flat surfaces, transforming inclined shear buckling failure into CFRP fracture failure. Specimens with aspect ratio above 4 experienced instability failures. Under same cross-section, CFRP increased axial compression bearing capacity and ductility by up to 30.8% and 43.4% respectively. As aspect ratio increased, enhancement coefficients of bearing capacity and ductility gradually decreased, the aspect ratio is restrictive when it is less than 2.5. CFRP strengthening increased initial axial compression stiffness of specimens by up to 117.9%. The stiffness decreased gradually with increasing aspect ratio, with most significant increase at aspect ratio of 4. Strain analysis showed CFRP bonding remarkably reduced circumferential and longitudinal strains. Confinement effect was optimal at aspect ratio around 2.0. The rationality of the refined FE model established has been verified in terms of load displacement curves, capturing circular aluminum tube oblique shear buckling, concrete "V" shaped crushing, and CFRP tearing during specimen failure. The parameter analysis showed that increasing the number of CFRP layers is one of the most effective methods for improving the ultimate bearing capacity of RCFCAT.

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“…Scholars have conclusively stated that the flange-bonded approach leads to better results compared to the use of the web-bonded method, whereby their differences encompass several aspects including ductility, cost, capacity, and performance level. Moreover, they have given a report of the excellent compliance shown by the CFRP flange-bonded scheme performance compared with that of the steel-bracing method [35,36].…”

Section: Introductionmentioning

confidence: 99%

Efficiency of Flange-Bonded CFRP Sheets in Relocation of Plastic Hinge in RC Beam–Column Joints

Hejazi,

Azarm,

Firoozi

2023

Applied Sciences

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Beam–column connection zones are high regions of interest in reinforced concrete (RC) structures, which are expected to respond elastically to seismic loads. Using carbon fiber-reinforced polymers (CFRP) to improve these connections, performance is critical in retrofitting deficient RC frames because existing slabs may pose numerous limitations in the design and wrapping of CFRP sheets in joints. The main aim of this research is to develop a new design for flange-bonded CFRP retrofit of frames, including slabs, for the relocation of plastic hinges of the connection area toward the beam and to develop beam–column joint capacity and building stability in cases of subjection to dynamic loads. The performance of these proposed retrofittings was explored both experimentally and numerically. Two full-scale fabricated interior RC joints of a real moment-resisting frame with moderate ductility were subjected to monotonic loads before and after retrofitting, and the results were used to detail the numerical progress and verify of the beam–column connection. Moreover, a parametric study was conducted on CFRP sheets’ optimal thickness to examine its influence on plastic hinge relocation in the connection region. Results show that the retrofitting method can efficiently relocate the plastic hinge to the mid-span of the beam, which, in turn, leads to improved capacity and achievement of the RC frame and guarantees better structural safety a lower cost.

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Flexural behavior of concrete-filled SHS and RHS aluminum alloy tubes strengthened with CFRP

Cited by 19 publications

References 28 publications

Aluminium members in composite structures – a review

Aluminium members in composite structures – a review

Experimental study and numerical analysis on axial compression of round-ended concrete filled CFRP-aluminum tube columns

Efficiency of Flange-Bonded CFRP Sheets in Relocation of Plastic Hinge in RC Beam–Column Joints

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