@article{Yuuya Katsuda_Satoshi Sugimoto_Yoichi Ishizuka_Shohei Iwasaki_Ryoma Takaesu_Minoru Yamanaka_2019, title={DEVELOPMENT OF THE DEFORMATION MONITORING SYSTEM WITH WIRELESS SENSOR NETWORK AND EVALUATION OF MECHANICAL STABILITY FOR DAMAGED STONEWALLS}, volume={17}, url={https://geomatejournal.com/geomate/article/view/2112}, abstractNote={<p>Kumamoto Castle has constructed about 400 years ago, and now Cultural Affairs Agency of Japan<br>treats as an important historical spot. The 2016 Kumamoto Earthquake was damaged a lot of stonewalls of this<br>castle. Authors continue to investigate the deformation of unstable stonewalls by high accuracy laser module for<br>measuring distance. And these stonewalls should be monitored continuously for the evaluation of mechanical<br>stability, so we developed and established the wireless network system for measuring the changing angle of some<br>stonewalls surface in this castle. The characteristics of this system are low cost and low power consumption with<br>small-scale electric generation and a simple server. Authors also carried out making the simulation model and<br>calculation for evaluation of stonewalls stability by the distinct element method under the several conditions of<br>stonewall shape and interface of materials. The failure area of stonewalls and backfill are estimated by these results<br>of the simulation, and it is discussed that these areas should be reinforced under repair of damaged stonewalls.<br><br></p>}, number={63}, journal={GEOMATE Journal}, author={Yuuya Katsuda and Satoshi Sugimoto and Yoichi Ishizuka and Shohei Iwasaki and Ryoma Takaesu and Minoru Yamanaka}, year={2019}, month={Mar.}, pages={1–8} }