超高強度合成繊維補強コンクリートを用いた接合部を有するRC床版の疲労耐久性

抄録

The authors have developed precast RC-slab made of Ultra high-strength PVA reinforced concrete (PVA-UFC) having thin thickness, lightweight and high fatigue durability. In this study, fatigue durability of joined PVA-UFC slab is evaluated by wheel load running test according to "NEXCO Test Method 442", and loading with a step-wise loading method by PWRI until 394kN. Even though the slab is designed about 80% thinner thickness than ordinary slab based on "Specifications for highway bridges", the specimen developed sufficient fatigue durability. Thus, PVA-UFC slab including the joint showed over 100 years fatigue durability at the Test of 442, and at the Test of PWRI, over 300-times fatigue durability of NEXCO 442 loading was recognized even under a wet condition having pool on the surface.