Structural behaviour of steel cold-formed sigma beams strengthened with bonded steel tapes

Szewczak, Ilona; Rzeszut, Katarzyna; Różyło, Patryk

doi:10.1016/j.tws.2020.107295

Cited by 11 publications

(14 citation statements)

References 6 publications

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“…It is worth noting, however, that at this point the percentage limitation of displacements obtained for the beam reinforced with steel and CFRP tapes is quite similar. Moreover, the results of strain of individual beams reinforced with a steel tape were characterized by a fairly large dispersion of the results [ 2 ], therefore, based on a limited number of samples, no unambiguous conclusions should be drawn.…”

Section: Laboratory Resultsmentioning

confidence: 99%

“…The length of the reinforcement tapes was 175 cm. A detailed description of the laboratory tests is presented in [ 1 , 2 ]. The schematic drawing of the laboratory stand is presented in Figure 1 a (dimensions are given in cm), while its real form is presented in Figure 1 b.…”

Section: Laboratory Standmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…In recent years, CFRP (Carbon Fiber Reinforcement Polymers/Plastics) tapes have found widespread use for reinforcing concrete and masonry structures [ 1 , 2 ]. It became possible, thanks to the introduction of transparent and simplified design procedure rules, to use tapes for this type of construction [ 1 , 2 ]. Currently, there are an increasing number of studies describing research on the use of CFRP tapes to strengthen timber structures [ 3 , 4 ], and even cast iron structural elements [ 5 ].…”

Section: Introductionmentioning

confidence: 99%

“…Each time, the research showed a satisfactory effect of the use of CFRP tapes on the limitation of strain and displacements of the reinforced elements. Due to the significant cost of composite tape materials, it was decided to conduct analogous tests of sigma beams reinforced with steel tapes [ 2 ]. In this study, a comparison of the effectiveness of reinforcement of steel cold-formed sigma beams with CFRP tapes and with steel tapes was presented.…”

Section: Introductionmentioning

confidence: 99%

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Influence of Mechanical Properties of Steel and CFRP Tapes on the Effectiveness of Strengthening Thin-Walled Beams

2021

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The paper presents a comparison of the effectiveness of strengthening steel thin-walled, cold-formed sigma beams with CFRP tapes and steel tapes. For this purpose, three beams without reinforcement (reference beams) of the “Blachy Pruszyński” type, with a cross-section of ∑200 × 70 × 2 and a span of 280 cm, made of S350GD steel grade, were subjected to laboratory tests in the four-point bending scheme. In the next stage the tests included nine ∑200 × 70 × 2 beams reinforced with Sika CarboDur S512 CFRP tape and six ∑200 × 70 × 2 beams reinforced with steel tape made of S235 steel grade. The length of the reinforcement tapes as well made of steel as well of CFRP was of 175 cm. The location of the tapes within the height of the beams’ cross-section was assumed in three variants, namely placing the tape on the upper or bottom flange and on the web. In the case of beams reinforced with CFRP, three beams were tested for each reinforcement location, and in the case of beams reinforced with steel tapes, two beams were tested for each reinforcement location. SikaDur®-30 glue with a thickness of 1.3 mm was used in order to connect steel or CFRP tapes to the beams. The dimensions of the tapes cross-sections in both cases were similar (CFRP tapes: 50 × 1.2 mm, steel tapes: 50 × 1.3 mm). For all types of beams, numerical models were also developed in the Abaqus software. The main aim of this paper was investigation of the influence of mechanical properties of steel or CFRP tapes on the effectiveness of strengthening ∑ beams. For this purpose a comparison of these two solutions with respect to the limitation of displacements and deformations of the beam was performed. The obtained results were considered in the context of the mechanical properties of the materials composing the reinforcement tapes. The tests showed slight differences in the results of strain and displacements obtained for reinforcement made of two different materials. It was also noted that the decisive element was the failure of the joint at the steel-glue interface. Therefore, future studies will pay particular attention to the adhesive layer.

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Section: Laboratory Resultsmentioning

confidence: 99%

Section: Laboratory Standmentioning

confidence: 99%