AN ANALYTICAL INVESTIGATION OF EWECS COMPOSITE COLUMN WITH AND WITHOUT SHEAR STUDS

Abstract

This paper explains the numerical analysis of EWECS (Engineering Wood Encased Concrete-Steel) column accompanied with shear stud connection under constant axial and lateral cyclic loads based on the previous experiment. This is the new structure system contains concrete encased steel (CES) core with an exterior woodpanel. The experiment was performed in a variety of wood panelconnection to the concrete. In this study, the non-linear finite element (FE) analysis is performed by modeling the column with the 3D solid element and the friction devices of the shear stud with the two-node-link element. The hysteresis characteristics comparison between experiment and numerical results show that the peak forces in every last loop (story drift) and hysteresis curves shape have similarity as well as on the main stiffness, ductility, and energy dissipation.The presence of shear studs on EWECS columns improved the ductility of the column andreduced the damage of woodpanel, but there was no much influence on maximum flexuralstrength of the column.With shear studs, the wood panel contributed to flexural capacity until maximum story drift, R of 5%, although cracks appeared at the column faces after R of 4%.Generally, the analytical method can be used to predict accuratelythe ultimate strength and behavior of EWECS columns