STRUCTURAL PERFORMANCE OF STRENGTHENED BOX STEEL BEAMS WITH COMPOSITE MATERIALS
DOI:
https://doi.org/10.11113/mjce.v28.15701Keywords:
Box steel beam, composite materials, finite element analysis, non-linear analysisAbstract
This paper presents four-point loading tests on eight steel box beams (one typical beam and seven strengthened beams). The beam samples are in dimension of 50x50x1000 mm. Four out of the seven beams were strengthened with steel plates. The other three beams were strengthened with composite materials (CFRP and GFRP flexible sheets). The sheets were wrapped around the whole section of beams at the critical locations. The tested beams were simulated by the Finite Element (FE) method using ANSYS program. The numerical results in terms of load–deflection curves, load-strain curves and failure modes were compared with experimentally measured data. The normal stresses distribution for the eight beams as obtained from the numerical model were also presented. The comparisons between the results of the eight beams were presented and discussed. From these results, it was observed that the predicted FE results are in good agreement with the experimental results. The experimental results showed that the failure in the strengthened beams with carbon fiber occurred in the top flange and the upper part of the two webs due to deboning and breakage in CFRP.References
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