Evaluation of fatigue durability of RC slabs impact of vibration load for difference in level of expansion joint

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  • 伸縮継手の段差により発生する振動荷重が及ぼすRC床版の耐疲労性の評価
  • シンシュク ツギテ ノ ダンサ ニ ヨリ ハッセイ スル シンドウ カジュウ ガ オヨボス RC ショウバン ノ タイヒロウセイ ノ ヒョウカ

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Abstract

<p>Deterioration of RC highway deck slabs due to repeated wheel running loads may be accelerated by superposing vibration load caused by bumps of expansion joints of bridges. This study was evaluated fatigue durability of wheel running fatigue test on running vibration load using RC slab specimens. The experiment were carried out fatigue experiment by a constant load. And conducted an experiment on running vibration loads with load amplitude of ± 20% and ± 30%. As result, the equivalent number of cycle of load applied load amplitude ± 20% and ± 30% of specimen is decreased 30% and 11% of the specimen with a constant load. Therefore fatigue life drastically decreases by running vibration. Based on the present test results, the S-N curves of RC slabs were proposed to evaluate the life estimation when vibration load is superposed.</p>

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