Analysis on shear stress in interlayer interface of concrete bride deck pavement

For studying the behavior of concrete bride deck pavement, the physiochemical property of interlayer interface was analyzed from microscopic view. Much initial pore and many initial cracks and low strength cement crystals were existed in the interlayer interface because of the cast time difference. A total of 32 samples were tested for studying the shear performance of pre- and post-casting concrete interface and the FEM analysis was done for the same reason. The results show that shear steel is the key factor in shearing of the Interlayer Interface. The shear stiffness and the cracking load are marked increased and the shear property and the service performance are shaped improved while the ratio of shear steel is more than the minimum one.