Stability Analysis of The Bayon Central Tower with NMM-DDA Considering The Excavation of The Foundation

The Angkor ruin, a World Cultural Heritage in Cambodia, includes many masonry structures in dangers of collapse due to uneven settlement of the foundation ground. In order to select proper and effective methods for conservation, it is important to evaluate the stability of the structures considering the ground deformation. In the previous studies, as a numerical method which can simulate the discontinuous behaviors of the masonry blocks and the continuous deformation of the ground simultaneously, the coupled Numerical Manifold Method (NMM) and Discontinuous Deformation Analysis (DDA) was developed and extended to the elasto-plastic simulation code. In this paper, an application example of NMM-DDA to an actual problem in the Angkor ruin is provided. The stability analysis of the Bayon Central Tower, one of the most important masonry monuments in the Angkor was carried out. In the simulation, excavation of the foundation ground which is planned in restoration project was considered, and its influence on the behavior of the structure was discussed from the simulation results.