DAMAGE ANALYSIS OF BRIDGES AFFECTED BY TSUNAMI DUE TO GREAT EAST JAPAN EARTHQUAKE
DAMAGE ANALYSIS OF BRIDGES AFFECTED BY TSUNAMI DUE TO GREAT EAST JAPAN EARTHQUAKE
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发表时间：
2012
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通讯作者：
K. Kosa
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作者：
K. Kosa
东日本大地震及其引发的海啸袭击了日本沿海地区。研究发现，钢结构和钢桁梁桥的外流比混凝土桥梁严重。利用录像资料估算了5个重灾区的海啸流速，总体平均值约为6.0m/s。在陆前高田，30%的钢筋混凝土建筑遭受结构性破坏，40%的桥梁流出。此外，还发现上部结构的出流情况可以初步用上部结构阻力与波浪水平力比值β的大小来判断。
The Great East Japan Earthquake and the resulting tsunami hit the coastal areas of Japan. It is found that the outflow of steel and steel truss bridges is more serious than concrete bridges. By the use of videos, the tsunami velocities in 5 severely affected areas were estimated and the overall average is about 6.0m/s. In Rikuzentakata, 30% RC buildings suffered structural damage and 40% bridges flowed out. Besides, it is found that the outflow of superstructure is able to be judged by the level of ratio β between superstructure resistance and wave horizontal force primarily.