PURPOSES: In this study, a numerical parametric study was performed to evaluate the effect of angular velocity and weight of wheel, and density of road-bed particles on corrugation development. METHODS : Discrete element method coupled with rigid body dynamics was applied to simulate a wheel-running circular table with variations in independent parameters, such as wheel angular velocity, wheel weight, and particle density. The position profiles for travel distance from origin were compared and analyzed to confirm if the trend from numerical analysis agrees with the analytical solution. RESULTS: The angular velocity of the wheel exhibits a clear inverse relationship with the development of corrugation even though the weight of wheel does not demonstrate clear trends for both long-wave and short-wave corrugation. The density of road-bed particles is observed to have clear proportional effect on corrugation development. The movement of corrugation to the running direction, which was observed in previous research, is also observed for various conditions. CONCLUSIONS : The parametric study using discrete element method with rigid body dynamics clearly exhibits good agreement with analytical solution for initiation of corrugation. The coupled method is confirmed to supply additional information that cannot be delivered by analytical solution only.

RC-SC 이종부재 접합부는 SC구조의 적용구간에 따라 RC-SC벽체 수평면 접합과 RC-SC벽체 연직면 접합 등 다양한 접합부 형태가 발생한다. 그러나 이종부재 접합부의 다양한 형태를 실증실험으로 모두 검증하기에는 비용과 시간 등 많은 제약사항이 존재한다. 선행연구에서 유한요소해석을 통해 다양한 이종부재 접합부 형태의 구조 건전성을 확인하고자 접합부 해석방법론을 개발 및 검증한바 있다. 본 연구에서는 RC-SC이종부재 접합부 해석 방법론을 개발하는 과정에서 선 수행한 요소별 해석결과, 제한조건 및 마찰계수별 해석결과 등 해석 시 요구되는 단계별 변수 해석결과를 분석/결정하여 RC-SC 이종부재 접합부 해석방법에 활용할 최적화된 변수를 선정하였다.