第１部門④

[21006-11-04] Seismic Response Analysis of Earth-fill Dam with Use of GPR to Estimate Spatial Distribution of Ground Stiffness (Proceedings of Symposium on Applied Mechanics)

*Shin-ichi Nishimura¹, Ryota Ohashi³, Yuxiang Ren¹, Minoru Kaneshige², Tshifumi Shibata¹, Takayuki Shuku¹ (1. Okayama University, 2. Lagrof Civil Design , 3. Shimizu Corp.)

Keywords:3-dimensional survey, 3-dimensional seismic response analysis, Gaussian process regression, earth-fill dam

In this study, for the purpose of incorporating the three-dimensional survey technique into the design of geo-structures, an earth-fill dam is surveyed three-dimensionally by a drone, and a three-dimensional finite element model of the dam is made based on the survey results. The spatial distribution of the ground rigidity is estimated based on screw weight sounding test results, and then applied to the 3-D FEM modeling. The Gaussian process regression is used to model the random field for the subsurface ground. Finally, the FEM model is applied to a seismic response analysis, and the locations of high acceleration and high shear stress inside the earth-fill dam are identified.