A steel-FRP-concrete composite deck was developed for replacement of deteriorated slab. The slab is composed of a FRP permanent form installed with steel pipes which can strengthen and lighten the RC deck subjected to fatigue loading or corrosion. Durability of a model deck containing two types of joint was tested with the wheel running machine. In the paper, the load bearing characteristics of each section was observed by monitoring strain distributions. It can be concluded to have enough fatigue durability that the deck must be reinforced for shearing strength the slab is not divided into two layers of the upper RC part above steel tubes and the lower part. Also joints of the bottom plate were examined not to be critical to the deck failure due to omission of the lower distribution reinforcements. It was confirmed the double splice joint has enough function as a FRP panel joint structure.
