Feasibility study on the fatigue characteristics of the reinforced CFS with self-healing repair methods for RC slabs

Abstract

Japan's Ministry of Land, Infrastructure, Transport and Tourism surveyed and inspected bridges with the goal of increasing the lifespan of the bridges and to downwardly standardize bridge maintenance costs, and established the "Highway Bridges Long Life Repair Plan." According to the results of survey and inspection, the most serious damage to RC slabs is caused by fatigue deterioration, which results from the driving loads of large-sized vehicles, and aging of materials. In response to this, adhesion reinforcement using carbon fiber sheet is being adopted. Therefore, in this study, specimens with bottom side CFS adhesion reinforcement on the bottom surface of the RC slab were manufactured. Then, fatigue tests under running wheel loads were conducted, and thus fatigue resistance was evaluated using the specimens. In addition, new RC slab supplementation technique was suggested.