Evaluation of cumulative damage of RC members under repeated impact loading

摘要

In the civil and structural engineering field, there are many problems regarding the act of impact loading against some structures due to natural disaster. So it is important to evaluate the damage condition of them after impact loading, and to estimate their residual performance. This study is focused on a reinforced concrete (herein after called RC) structure such as caisson breakwater and rock-shed. In order to quantitatively evaluate the dynamic behavior and cumulative damage of RC members under low-velocity single and repeated impact loading, we conducted a numerical approach by using the theory of Continuum Damage Mechanics (herein after called CDM). As the result, we clarified not only impact behavior of the members but also the relationship between cumulative kinetic energy of repeated impact loading and cumulative damage of the members. In addition, the applicability limit of our model based on scalar damage modeling was clarified.