The 2019 World Congress on Advances in Structural Engineering and Mechanics
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This study presents a numerically parametric study on the plate-to-box column connections with internal diaphragms. When the rolled-shape column is used, the internal diaphragm provides a difficulty for structural fabrication. However, the internal diaphragm delivers an excellent strength to the connection and less functional obstruction to the structural system. In common practice, the internal diaphragms are used in built-up box column connections for high-rise buildings. The strength of the connection can be predicted manually using the yield mechanism occurs in the presumed active components. Previous studies on the internal diaphragm connection between plates and box column are limited to clarify the effect of plate-to-column width, column width-to-thickness, and concrete on strength of the connection. This study aims to investigate the effects of such those parameters on the strength of the connection through a numerically parametric study. The load-deformation relations of the connection were also characterized using a tri-linear load-deformation curve. The results were validated and showed that the parameters mentioned above significantly affected the strength of the connection. The strength of the connection increased according to the wider plate and the thinner column thickness. Furthermore, concrete was also observed to contribute to the strength of the internal diaphragm connection about 1.3 times compared with the connection without concrete filling.
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