SEISMIC EVALUATION OF STONE WALL REINFORCEMENT TECHNOLOGY BY LARGE-SCALE SHAKING TABLE TEST

Abstract

 Kumamoto Prefecture was severely damaged by the 2016 Kumamoto earthquake (M_j 6.5 foreshock and M_j 7.3 main shock). Especially in Kumamoto Castle, 30% of the entire stone wall was damaged by collapse and bulge. However, seismic retrofitting measures for castle stone walls have hardly been implemented because they have not been verified by experiments. Therefore, using the large-scale vibration test facility of the National Research Institute for Earth Science and Disaster Prevention in Tsukuba City, Ibaraki Prefecture, six models of seismic performance tests were conducted during the period from August 5 to October 14, 2019.

 In this paper, the contents and results of the large-scale experiment are mentioned. It was clarified that the geotextile roll-in type for stone bases and the anchoring method using urethane for non-stone bases are very effective with very few deformations.