CAUSES OF SHOWA BRIDGE COLLAPSE IN THE 1964 NIIGATA EARTHQUAKE BASED ON EYEWITNESS TESTIMONY :

• YOSHIDA,NOZOMU

  Tohoku Gakuin University

• TAZOH,TAKASHI

  Shimizu Corporation

• WAKAMATSU,KAZUE

  National Research Institute for Earth Science and Disaster Prevention

• YASUDA,SUSUMU

  Tokyo Denki University

• TOWHATA,IKUO

  The University of Tokyo

• NAKAZAWA,HIROSHI

  Port and Airport Research Institute

• KIKU,HIROYOSHI

  Kanto Gakuin University

Abstract

Testimony from eyewitnesses of the Showa Bridge collapse was collected with the objective of pinning down the cause of the collapse. On the basis of this testimony, a chronology of events was established. The bridge collapsed about 70 seconds from the beginning of the earthquake, i.e., long after the strong shock. The liquefaction-induced flow occurred after the collapse of the bridge. By studying these times of occurrence, as well as observed earthquake records, the cause of the Showa Bridge collapse was deduced. The possibility of inertia force in the superstructure and liquefaction-induced flow is low as the main cause of the collapse of the Showa Bridge. There is a high possibility that it was due to increased displacement of the ground in circumstances where pile deformation occurred more easily due to liquefaction.

Journal

• Soil and foundation

  Soil and foundation 47 (6), 1075-1087,

  Japanese Society of Soil Mechanics and Foundation Engineering

Keywords

• bridge
• earthquake
• foundation
• liquefaction
• (liquefaction-induced flow)

Details

• CRID: 1541980095188513536
• NII Article ID: 110007327296
• NII Book ID: AA00700879
• Web Site: http://dl.ndl.go.jp/info:ndljp/pid/10450360
• Text Lang: en
• Data Source:
  • NDL-Digital
  • CiNii Articles