Ultimate capacity of uniaxially compressed perforated steel plates strengthened by using CFRPs

Tao, Xin; Cao, Shuangyin

doi:10.1201/9781315116259-81

Cited by 1 publication

(2 citation statements)

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“…The aim of this paper is to study the buckling of the plate, and when buckling, no delimitation of FRP has been found, so in the finite element (FE) models, the delimitation of FRP and the influence of manufacturing technology is not taken into account, and the FRP are considered an orthotropic material. The values of the basic geometry and material parameters are in Table 1, and the details of the experiments are in literature [19]. The elastic buckling loads PcrExp are determined from the experiments by two methods, and averaged; These two methods are the load-axial displacement curve and the load-transverse displacement squared method [14,20].…”

Section: Comparison With the Experimental Resultsmentioning

confidence: 99%

“…Therefore, the FE models are very accurate and enough for the studies in the next section. In order to verify FE models used in this study, a comparison with the authors' experimental results [19] on the critical stress of perforated plates strengthened with FRP has been performed, and the results are in Table 2. It can be seen that the FE models have a very limited relative absolute error in fcr, in the consider cases, the errors are 13.0% on maximum, 4.05% on average, and 0.108 on the coefficient of variation.…”

Section: Model Verificationmentioning

confidence: 99%

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Elastic Stability of Perforated Plates Strengthened with FRP under Uniaxial Compression

2017

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Abstract:Openings are frequently introduced in plates for the purpose of inspection, maintenance, service, etc. The presence of openings reduces the buckling and ultimate capacity significantly, and pasting fiber-reinforced polymers (FRP) is an ideal technique for postponing the buckling and increasing the ultimate capacity of the plates. In this paper, the finite element (FE) method has been employed to study the buckling stress of the perforated plates strengthened with FRP under uniaxial compression, and several parameters are considered: material's geometrical and mechanical properties, boundary conditions, plate aspect ratio, hole sizes, and hole position. Then a method of calculating the buckling stress is proposed and modified based on the theory of composite plate and the numerical results. The study shows that, the stiffness modified factor α D , which considers the orthotropic properties of FRP are a function of the reinforcement index ω and hole size d/b for Boundary conditions (BCs) of 4S and 3S1F. And it is recommended to place the big hole close to the middle area of the plate in x-axis. It also shows that for a small hole size, there is little effect of the hole position e y /b on buckling coefficient K u regardless of the BCs, and that effect becomes more pronounced as d/b increases, so it is recommended to put the holes near the middle of the plate for 4S and the simple support edge for 3S1F in y-axis.

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Section: Comparison With the Experimental Resultsmentioning

confidence: 99%

Section: Model Verificationmentioning

confidence: 99%