2018 年 14 巻 1 号 p. 11-12
This article is the summary of the author’ thesis (Hashimoto, 2017), which is the winning paper of the Japanese Society for Rock Mechanics (JSRM) Doctoral Thesis Award 2017. The Angkor ruins, a World Heritage in Cambodia, includes many masonry structures in danger of collapse due to geotechnical problems, such as uneven settlement of the foundation ground. In order to select suitable restoration methods, stability evaluation considering the mechanical interaction between the masonry building (discontinuum) and the foundation ground (continuum) is required. In this study, to establish the stability evaluation method for the historic masonry structures, a numeridcal method for the composite structure of the soils and the masonry stones is newly proposed based on the coupled Numerical Manifold Method and Discontinuous Deformation Analysis (NMM-DDA), a discontinuum-based numerical method. Using the developed method, the failure modes/mechanisms and the bearing capacity characteraistics of masonry structure foundations were investigated. Finally, incorporating the results by the numerical analyses, a simplified design scheme that can be easily implemented in the actual restoration projects was also proposed.