3D Laser Scanning Technology and Finite Element Method for Thai Ancient Masonry Fort: A case study of Mahakarn Fort

Abstract

This research presents the archiving of terrestrial 3D laser scan data and finite element method for preservation of Thai Ancient Masonry Fort. The Mahakarn fort is selected as a case study. By applying the terrestrial laser scanning technology, the digital massive data of the fort was archived. The obtained data was applied to develop the 3D point cloud model of the fort. The current dimensions and elevation of the fort in main directions are reported in this paper. The samples of masonry materials were collected from various locations of the fort. The density and compressive strength of masonry materials were evaluated in laboratory. Based on the 3D point cloud data, the 3D solid model of the assumed original shape of the fort was developed. The finite element method was applied for structural analysis. The contour of principle stresses was developed to identify the locations of peak stressed in compression and tension zones. The deformation contour of the fort due to dead load and live load was predicted in comparison with the current 3D point cloud model. The obtained data can be applied for further stability assessment and structural health monitoring.