Different from Point by Point measurement technique, 3-D photogrammetry technique enables to monitor the shape and dimension measured-objects in non-contact, remotely and globally. In order to provide a rational maintenance strategy, it is important to assess current structural properties of existing structures due to long-term structural degradation, static and dynamic loads. In this paper, the applications of 3-D photogrammetry in capturing 3-D spatial coordinate of shape-complicated existing historical structures such as the Nagasaki Peace Praying Statue etc. are reported. Then, captured spatial data were converted into surface data and solid data to perform 3-D finite elements for dynamic structural analyses. The structural strengtheninng efficiency was verified through free vibration characteristics evaluation.
