MATERIAL PROPERTIES AND SEISMIC EVALUATION OF A TRAPEZOIDAL CSG DAM BASED ON ACTUAL SEISMIC BEHAVIOR

Abstract

 In this study, the elastic modulus of cemented sand and gravel (CSG) dam and its dependence on confining pressure were clarified by performing triaxial compression tests and pressuremeter tests. The results of these material tests were verified by a reproduction analysis of the dynamic behavior of the Apporo Dam during an actual earthquake. By analyzing 30 seismic records of the dam, the dynamic characteristics of the dam were clarified. New findings were obtained regarding the dynamic characteristics of this new type of dam that originated in Japan. In addition, after checking the internal and external stabilities of the Apporo Dam with the results of the reproduction analysis, it was confirmed that the trapezoidal CSG dam has excellent seismic resistance.