• Roshan Dahaghane
• L.R. Wankhade

In this paper, a comparative analytical study of concrete-filled steel tubular (CFST) laced columns is presented for circular and octagonal cross-section with shear connectors. These columns consist of four concrete-filled steel tubes are laced together. An analytical study was performed to quantify the column failure mechanism at ultimate loads. The study shows that the resulting load-deflection curves. These curves were then used to quantify the structural behavior of each element of the 4laced CFST column. The analysis results indicate that the compression force in the longitudinal members dominated the failure mechanism in the 4-tube laced CFST columns. In-plane bending occurred when member segments reached the compression failure load. Due to confinement effects, octagonal 4-tube laced CFST columns have a lower maximum load capacity than circular 4-tube lace CFST columns. The load carrying capacity of octagonal CFST with shear connectors provided is more than that of circular 4-tube laced CFST column without shear connectors. The lacing elements (diagonal and horizontal braces) were found to have low forces and remain within the elastic range until failure. Analytical studies have shown that load-bearing capacity decreases with increasing aspect ratio and eccentricity.

CFST, d/t ratio, Finite-element analysis, Ultimate load, shear connectors

"BEHAVIOR OF 4-LACED CONCRETE FILLED STEEL TUBE COLUMN UNDER AXIAL COMPRESSION ", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.9, Issue 9, page no.d754-d763, September 2022, Available :http://www.jetir.org/papers/JETIR2209388.pdf

"BEHAVIOR OF 4-LACED CONCRETE FILLED STEEL TUBE COLUMN UNDER AXIAL COMPRESSION ", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.9, Issue 9, page no. ppd754-d763, September 2022, Available at : http://www.jetir.org/papers/JETIR2209388.pdf