Full scale Experimental Research on Shear Capacity of Concrete filled steel tube Column Connections

Abstract:

Experimental research was conducted on 10 full scale concrete filled steel tube (CFT) column connections to investigate their seismic performance under various axial force ratios. Different shear strength equations were compared, and the shear strength deformation relations were further implemented into OpenSEES simulations. Results show that all tested CFT connections present excellent shear capacity in resisting lateral loadings; the equations proposed in Chinese specifications need improving; and OpenSEES model provides reasonable simulations on both shear strength and shear deformations of the joints.

Key words:concrete filled steel tube (CFT) column connections; shear strength; shear strength deformation relations; full scale experiments; numerical simulations