EVALUATION OF FATIGUE RESISTANCE AND MAINTENANCE OF RC SLAB REINFORCED BY CFS UNDER RUNNING WHEEL LOAD

Abstract

The CFS reinforcement method is planned to the fatigue damage of the RC slab in the repair and maintenance methods in the long life repair plan for road bridge. Then, it is fatigue tests under running wheel loading were conducted, to predict lifetime and the timing of re-repair of CFS using RC slab. As result, that is derived which evaluated the number of equivalent cycles by running tests under running wheel loading, D-N curve damage factor of moist condition concrete, and the number of equivalent cycles for reinforcement consider for revision factor of design quality. Therefore, this study S-N curve is suggested to predict destruction and re- repair time when design quality of 1964, 1968 designed RC slab with reinforced by the CFS enabled to predict of the timing of secondary repair. This study is contributory to the repair and maintenance methods in the long life repair plan for road bridge RC slabs with the bottom surface reinforced by bonding the CFS.