Shear buckling behavior of a plate composite girder using concrete‑filled steel tube structures

In this study, the shear buckling behavior of plate girders using concrete-filled steel tube structure was verified by nonlinear finite element analysis using CEB-FIP 1990 code. In addition, shear buckling tests were carried out on the model specimens and compared with the analysis. As a result, it was confirmed that the proposed plate girder improved the shear buckling resistance compared to the general plate girder. Also, by comparing the test results with the analysis, we propose that the proposed CEP-FIP code is a reasonable analysis. Particularly, as a result of comparing the maximum deflection displacement of the plate girder, it was found that the proposed girder improved the shear buckling resistance performance due to the confinement effect of the concrete-filled steel tube structure than general plate girder.