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

This paper explains the numerical analysis of EWECS (Engineering Wood Encased ConcreteSteel) composite columns with and without shear studs connection under constant axial and lateral cyclic loads based on the previous experiment. EWECS column is the new composite structure contains concrete encased steel (CES) core covered by a wood panel. The shear studs were used to connect between CES core and wood panel. 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 studs with the two-node-link element. The results show that the hysteresis curves shape from FE analysis has similarity with those from the test data as well as on the main stiffness, ductility, and energy dissipation. The addition of shear studs increased the ductility of the EWECS column; however, it had no significant effect on the maximum flexural capacity. The wood panel had the contribution to flexural strength of the EWECS columns until large story drift, R of 5%, even though the damage of the column occurred at story drift of 4%.