Experimental and theoretical investigation on torsional behaviour of CFRP strengthened square hollow steel section

Chahkand, N. Abdollahi; Jumaat, Mohd Zamin; Sulong, N.H. Ramli; Zhao, Xiao Ling; Mohammadizadeh, Mohammad R.

doi:10.1016/j.tws.2013.03.008

Cited by 25 publications

(6 citation statements)

References 18 publications

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“…Sayed-Ahmed et al [7], Ritchie et al [8], Shaat and Fam [9], and Imran et al [10] concluded that adhesively bonded CFRP is effective for strengthening steel members experiencing compressive load. The externally bonded CFRP method can also improve the performance of steel members subjected to torsional loading [11][12][13] and steel shear wall [14,15].…”

Section: Introductionmentioning

confidence: 99%

Finite Element Analysis of Axial Compression Steel Members Strengthened with Unbonded CFRP Laminates

2020

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This paper presented a non-linear finite element (FE) analysis to investigate the potential of unbonded carbon fiber-reinforced polymers (CFRP) strengthening in improving the axial compression performance of steel members. The FE model was firstly developed and validated against experimental works. Four parameters considered in the parametric study were the number of CFRP layers, CFRP length, slenderness ratio, and elastic modulus of CFRP. It was confirmed that the unbonded CFRP strengthening method is effective at enhancing the load-carrying capacity as well as delaying the overall buckling of the axial steel members. The strength increase is highly affected by the first three parameters. In addition, the method of an equivalent slenderness ratio can be used for strength design.

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Section: Introductionmentioning

confidence: 99%

Finite Element Analysis of Axial Compression Steel Members Strengthened with Unbonded CFRP Laminates

2020

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“…He considered the metal/composite bonding strength as the most important factor of structure's performance that should be investigated. 9 Abdollahi Chahkand et al 10 reported torsional strength increase of hollow steel sections reinforced with carbon fiber/epoxy laminates.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the effect of aluminum surface treatment on mechanical and dynamic properties of PVC/aluminum/fiber glass fiber metal laminates

Zal

Naeini

Bahramian

et al. 2016

Proceedings of the Institution of Mechanical Engineers, Part E:

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A study on new materials usage to produce fiber metal laminates is presented in this work. Amorphous polyvinyl chloride thermoplastic and aluminum 3550 sheets are used to fabricate the fiber metal laminates. Different surface treatments were carried out on the aluminum sheets and the fiber metal laminates were produced using the film stacking procedure. Flexural strength and modulus of the products and also shear strength of bonding were measured using three-point bending test, and their failure mechanisms were evaluated using optical microscope images. Also, the effects of aluminum layer and aluminum/composite laminates bonding on the dynamic properties of the fiber metal laminates were studied using Dynamic Mechanical Thermal Analysis. It was concluded that mechanical roughening of the aluminum sheet has the maximum effect on the aluminum/matrix bonding strength such that simultaneous fracture of composite laminates and aluminum layer in the bending condition was observed in the produced fiber metal laminates without any delamination.

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“…Strengthening of cold formed steel structures with adhesively bonded carbon fiber reinforced polymer (CFRP) laminates has attracted much research attention in recent years (Yu et al, 2014;Zhao and Zhang, 2007;Teng et al, 2012;Wu et al, 2012). The results showed a considerable increase in strength due to CFRP strengthening (Heider et al, 2012;Nuno Silvestre et al, 2009;Bambach et al, 2009;Abdollahi Chahkand et al, 2013;Teixeira de Freitas et al, 2014). Bond is the interaction mechanism that enables the transfer of stresses between steel and the surrounding CFRP.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation of Bond Characteristics between CFRP and Steel under Tensile Loads

Kalavagunta

Naganathan²,

Mustapha³

et al. 2016

JJCE

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Rehabilitation of damaged infrastructure has become a priority in recent years as an alternative to the daunting costs of rebuilding structures. Traditional strengthening methods have drawbacks, many of which can be overcome through the use of carbon fiber reinforced polymer CFRP. Considerable research has been directed to investigate the effectiveness of bond length and strength between CFRP and steel. Research results indicated that significant increase in strength due to CFRP strengthening can be obtained. Nevertheless, in-depth understanding of debonding failures along the steel-epoxy interface is still a challenging issue. This paper presents three different experimental models with new surface preparation to increase bond strength and control debonding failure between CFRP fabrics and steel. The experimental results indicated that debonding failure can be controlled to some extent with proposed surface preparation technology.

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Experimental and theoretical investigation on torsional behaviour of CFRP strengthened square hollow steel section

Cited by 25 publications

References 18 publications

Finite Element Analysis of Axial Compression Steel Members Strengthened with Unbonded CFRP Laminates

Finite Element Analysis of Axial Compression Steel Members Strengthened with Unbonded CFRP Laminates

Evaluation of the effect of aluminum surface treatment on mechanical and dynamic properties of PVC/aluminum/fiber glass fiber metal laminates

Experimental Investigation of Bond Characteristics between CFRP and Steel under Tensile Loads

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