2022 年 22 巻 3 号 p. 3_16-3_29
To verify the seismic performance of arch dams, it is necessary to evaluate the tensile stress caused by earthquake motion. When evaluating against strong earthquake motion, it is essential to consider the non-linearity of dynamic deformation property of dam. However, there is not much research on the effects of non-linear dynamic deformation property on seismic stress. The three-dimensional dynamic analysis was carried out to examine the impact on the seismic tensile stress when there is a reduction in dynamic shear modulus. The results show that both dynamic shear modulus and seismic tensile stress decreased at the most parts of the dam, but show an increase at the dam crest and abutment. In regard to seismic performance verification of arch dams, it should be noted that the seismic tensile stress may increase in some parts of dam by considering the non-linearity of dynamic shear modulus.
