地下空洞と地下構造物

[III-455] Measurement of longitudinal load acting on precast arch culvert

〇Shunya Yamazaki¹, Tsubasa Noda¹, Masahiro Ishida¹, Hirohiko Kusaka², Masanori Nakazawa², Hirotake Nakamura³, Munehiro Saeki⁴, Motohiro Mano⁴, Haitetsu Ro⁴ (1.Public Works Research Institute, 2.Nippon Expressway Research Institute Company Limited, 3.Central Nippon Expressway Company Limited, 4.Eight-Japan Engineering Consultants Inc.)

Keywords:Precast arch culvert, Longitudinal load, Field measurement

In the 2011 off the Pacific coast of Tohoku Earthquake, damages such as cracks and concrete peeling of joints occurred on the 3-hinge precast arch culvert (hereinafter, 3-hinge arch) on the highway.It has been analyzed that this damage was caused by the fact that the 3-hinge arch behaved individually during the earthquake and collapsed in the longitudinal direction.In this study, the longitudinal load acting on the 3-hinge arch was measured at the realization site, and the consistency with the past numerical analysis results was confirmed.As a result, it showed the same tendency as the past numerical analysis results, and it was found that longitudinal load could be analyzed analytically.