Candi Prambanan, one of the historical masonry structures in Indonesia, is threatened by high potency of earthquake in Indonesia. Assessing the stability of Candi Prambanan is essential for determining the capability to withstand earthquake loads and for preservation and restoration purposes. Discontinuous Deformation Analysis (DDA) developed by Shi (1988) extensively studied and applied in the disciplines of rock mechanics and rock engineering. There is less or no research regarding the stability of Candi Prambanan. Hence, DDA is chosen as the method to simulate the stability of Candi Prambanan towards earthquake load. Geometry of each block of Candi Prambanan is obtained by Close Range Photogrammetry (CRP) method. Simulation of Candi Prambanan is conducted using the seismic excitation from one of the most destructive earthquakes in Indonesia, Yogyakarta Earthquake in 2006. Two-dimensional analysis is conducted using Shi original DDA code to simulate the rock behavior. Validation of the simple geometry by the analytical result shows the validity of DDA result. The result of the Candi Prambanan simulation shows the capability of DDA to simulate the behavior of masonry structure which allows fully detachment of the blocks. The simulation result validates by the on-site condition of the Candi Prambanan. During the earthquake, most of the top structures are failing, thus DDA can simulate and generate the result. Wider application of DDA into the historical masonry structure will be helpful to prevent more damage due to earthquakes.

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