Parametric Analysis on Mechanical Properties of High Rise CLT-concrete Core-tube System

Abstract:

Based on the state-of-the-art of high-rise wood structures and wood-concrete hybrid structures, combined with the performance superiority of cross-laminated timber (CLT), a hybrid structural system made of CLT shear wall and concrete core-tube was proposed. By using the finite element method, the effect of different parameters on the mechanical properties of the hybrid structure was studied. The results indicate that the variation of connection stiffness of CLT plates has great influence on the vertical displacement of CLT system. The increase of connection stiffness of CLT shear walls can significantly reduce the vertical displacement of CLT shear wall and the lateral displacements of global system. With the increase of concrete core wall thickness, the horizontal drift of global system decreases by 9.07% on average, but it has little effect on the vertical displacement of CLT system. The change in the number of floors, to some extent, has great influence on the global structural periods and the lateral drifts, but it has little effect on the vertical displacement of CLT system.