Authors had already developed a calculated technique based on STRIP method to analyze additional slab, which is strengthened by two panels with free edges settled independently on upper surface of damaged slab. In this paper displacements and stresses neighboring joint between added panels and behaviors of opening at joint are rigorously calculated by means of previous technique respectively in case that additional slab is supported by rigid girder. Some numerical results of displacements and stresses considering effects by asphalt pavement in actual deck slab are compared near joint portion at additional slab under wheel loading. Also when working area of added panels is constructed partially, distributions of several stresses in the vertical direction near joint portion of additional slab are respectively discussed.
