Clarification of mechanisms causing seismic disaster to precast arch culverts installed in embankments

2015 Fiscal Year Final Research Report

• Project/Area Number: 26889036
• Research Category: Grant-in-Aid for Research Activity Start-up
• Allocation Type: Single-year Grants
• Research Field: Geotechnical engineering
• Research Institution: Kyoto University
• Principal Investigator: Sawamura Yasuo 京都大学, 工学(系)研究科(研究院), 助教 (20738223)
• Project Period (FY): 2014-08-29 – 2016-03-31
• Keywords: ヒンジ式プレキャストアーチカルバート / 盛土 / 東日本大震災 / 遠心模型実験 / 有限要素解析

Outline of Final Research Achievements

Earthquake damage to several precast arch culverts installed in embankments was reported after the 2011 Great East Japan Earthquake. In this study, dynamic centrifuge model tests and numerical analyses were conducted to clarify the mechanisms causing seismic disaster to the culverts. From the results, it is confirmed that high overburden stresses can suppress the seismic behavior of the culverts near the mouth. Moreover, when the culverts and the embankment are obliquely-crossed, the asymmetrical earth pressure acting on the culverts is detrimental to the stability of the culverts.

Free Research Field

地盤工学