Verification of large deformation analyses for predicting the liquefaction-induced damage to soil-structure systems and improvement of the accuracy

2017 Fiscal Year Final Research Report

• Project/Area Number: 16K16374
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Natural disaster / Disaster prevention science
• Research Institution: Kyoto University
• Principal Investigator: Ueda Kyohei 京都大学, 防災研究所, 助教 (60649490)
• Project Period (FY): 2016-04-01 – 2018-03-31
• Keywords: 液状化 / 地盤・構造物系 / 大変形解析 / 有限変形理論 / 遠心模型実験

Outline of Final Research Achievements

For predicting the liquefaction-induced damage to soil-structure systems during large earthquakes with high accuracy including large deformation regime, the applicability of a large deformation analysis incorporating a strain space multiple mechanism model has been investigated. The analytical method is based on the large deformation (or finite strain) theory, in which both the material (or Lagrangian) and spatial (or Eulerian) descriptions are applied. Comparison of geotechnical centrifuge experiments with the simulation results has demonstrated that the precision accuracy of liquefaction-induced damage to soil-structure systems can be improved by considering the geometrical nonlinearity compared to numerical simulations based on the infinitesimal deformation theory.

Free Research Field

地盤地震工学