Relationship between fatigue resistance and fracture behavior of the carbon fiber sheet and carbon fiber strand sheet reinforced RC slabs

Abstract

According to the results of "Highway Bridges Long Life Repair Plan." 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. In addition, carbon fiber strand sheet that holds the same material characteristics as CFS, but has superior workability, has been developed as a new reinforcement material. However, almost no studies have been conducted on CFSS in relation to fatigue resistance evaluation through fatigue tests under running wheel loads, with the exception of a few by some organizations. Therefore, in this study, specimens with front CFS adhesion reinforcement on the bottom surface of the RC slab and specimens with grid-type CFSS reinforcement were manufactured. Then, fatigue tests under running wheel loads were conducted, and thus fatigue resistance was evaluated using the specimens.

Reinforcing effects of carbon fiber sheet by compressive strength differences on the RC slabs

“…CFS 전면접착보강 [12,13] CFS의 전면접착 범위는 실험체 지점간의 내측 1,100 mm × 1,100 mm의 범위로 한다. CFS의 전면접착보강 방법은 먼저, RC 상판 하면의 불순물의 제거 및 표면 처리를 한다 (Fig.…”