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The loop joint using for precast PC deck slab usually tends to increase the deck slab thickness. If the thickness can be thinner, the dead load of the deck slab can be reduced. So, the authors have de...veloped an improved loop joint which is inclining arrangement of loop joint for the purpose of reducing the deck slab thickness. In previous study, as the static bending test of slab specimens with the new joint, load-carrying behavior and durability satisfied the requirements for highway in Japan. This paper deal with the results of the wheel moving load test to examine the fatigue durability of precast PC deck slab including the improved loop joint. As results, sudden increases in vertical deflection, joint opening, and rebar strain were not confirmed at the load step (250kN × 100,000 times) that caused damage equivalent to 100 years on an actual bridge. Moreover, there was no water leakage from the bottom surface of the deck slab by the water filling test. Therefore, the required fatigue durability, which requires for about 100 years, was exhibited.続きを見る
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