詳細調査に基づく被災RC橋脚損傷度の定量的評価 [in Japanese] QUALITATIVE EVALUATION OF EARTHQUAKE-DAMAGED RC PIERS [in Japanese]
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震災により大きな被害を生じた阪神高速3号神戸線RC橋脚を対象に詳細調査により損傷度を定量的に評価した. その結果, 地中部に新たに多くのBランク損傷が発見された. また, As, Aランク橋脚のうち, 段落としを有する橋脚は72基あり, すべて段落とし部で損傷するとともに, せん断耐力相当加速度も306galとB1ランク以下の353galよりもかなり小さかった. そして, As, Aランクで段落とし無しにも関わらず中間部で損傷した11基はせん断耐力曲げ耐力比が1以下で, せん断耐力相当加速度も327galとB1ランク以下の397galに比べて小さいことが明らかとなった.
Detailed investigation was performed on the RC piers on the Hanshin Expressway Kobe Route which were damaged by the Great Hanshin Earthquake. Using these data, the relationship between the damage level and the ultimate bearing capacity was examined. Results showed that 72 piers ranked as As and A, all had reinforcement cut-off and sustained damage at this point. It was also showed that the average shear capacity index of these piers was smaller than that of piers which were ranked below B1. It was also found that 11 piers ranked As and A had no reinforcement cut-off, but failed at the middle section. These piers tend to have small values for the ratio of shear capacity vs. moment capacity and the shear capacity index.
- Proceedings of the Japan Society of Civil Engineers
Proceedings of the Japan Society of Civil Engineers 648, 179-190, 2000-05-20
Japan Society of Civil Engineers