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Many fracture accidents of steel structures, which did not enable to occur under static loading, were found at the Hyogo-ken Nanbu Earthquake (17 January, 1995). Considering the strain rate effect on ...fracture toughness was required to evaluate these fracture accidents quantitatively. The evaluation concept of fracture toughness at arbitrary strain rate is explained briefly. An analysis on the brittle fracture accident of centrifugal cast steel bridge pier for railway was performed by means of this method. The result makes clear that vertical impulsive seismic wave is considered to be the major cause of the brittle fracture accident generated on this bridge pier at the Hyogo-ken Nanbu Earthquake.続きを見る
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