Tsunami damage evaluation of Utatsu Bridge by video and 2-D simulation analyses

• Fu Li

  Dept. of Civil Eng., Kyushu Institute of Technology

• Kosa Kenji

  Dept. of Civil Eng., Kyushu Institute of Technology

• Sasaki Tatsuo

  Technical Generalization Division, Nippon Engineering Consultants Co., Ltd.

Abstract

Utatsu Bridge, a prestressed concrete bridge, suffered enormous damage from the destructive tsunami waves triggered by Great East Japan Earthquake, on March 11^th, 2011. Based on the field survey, it is clear that the bridge girders S3~S10 flowed out. With the application of the video recording tsunami-hit, the wave height and velocity histories are plotted. Meanwhile, the outflow mechanism of girder (S9) is analyzed, based on video result. On the other hand, two dimensional (2-D) simulation is conducted for Utatsu Town. The tsunami process, wave height and velocity histories are obtained. Besides, the outflow mechanism of girder (S9) is analyzed by simulation result once more. From video and simulation, it is known that the wave height rises slowly, which indicates no bore wave occurs; furthermore, it is found that when girder of Utatsu Bridge is flooded, the friction resistance is insufficient to resist tsunami force.

Journal

• Journal of Structural Engineering, A

  Journal of Structural Engineering, A 59A (0), 428-438, 2013

  Japan Society of Civil Engineers

Keywords

• tsunami
• outflow condition
• video analysis
• simulation analysis

Details

• CRID: 1390282680259943424
• NII Article ID: 130005438909
• DOI: 10.11532/structcivil.59a.428
• ISSN: 1881820X
• Text Lang: ja
• Data Source:
  • JaLC
  • CiNii Articles
• Abstract License Flag: Disallowed