Abstract
Steel-concrete composite slab seems to be preferable one to satisfy required performance on easy management in the specification of highway bridges. In this study, concrete replacement of the locally damaged steel-concrete composite slab was focused. In order to verify the continuity on fatigue durability after replacement as before, an experimental investigation was carried out with the wheel road running machine. As the result of tests, any abnormal degradation was not found and the replacement was improved to have a beneficial effect on fatigue durability of steel-concrete composite slabs.
