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LS-DYNA를 이용한 비탈면에 설치된 가드레일 지주의 동적거동 Analysis of the Dynamic Behavior of Guardrail Posts in Sloping Ground using LS-DYNA

이동우, 우광성
  • 언어KOR
  • URLhttp://db.koreascholar.com/Article/Detail/322414
한국도로학회논문집
제19권 제1호 (2017.02)
pp.21-28
한국도로학회 (Korean Society of Road Engineers)
초록

PURPOSES: This paper presents a finite element model to accurately represent the soil-post interaction of single guardrail posts in sloping ground. In this study, the maximum lateral resistance of a guardrail post has been investigated under static and dynamic loadings, with respect given to several parameters including post shape, embedment depth, ground inclination, and embedment location of the steel post. METHODS: Because current analytical methods applied to horizontal ground, including Winkler’s elastic spring model and the p-y curve method, cannot be directly applied to sloping ground, it is necessary to seek an alternative 3-D finite element model. For this purpose, a 3D FHWA soil model for road-base soils, as constructed using LS-DYNA, has been adopted to estimate the dynamic behavior of single guardrail posts using the pendulum drop test. RESULTS: For a laterally loaded guardrail post near slopes under static and dynamic loadings, the maximum lateral resistance of a guardrail post has been found to be reduced by approximately 12% and 13% relative to the static analysis and pendulum testing, respectively, due to the effects of ground inclination. CONCLUSIONS: It is expected that the proposed soil material model can be applied to guardrail systems installed near slopes.

저자
  • 이동우(수형산업개발(주) 기술연구소 소장) | LEE, Dong W
  • 우광성(영남대학교 교수) | Woo, Kwang Sung 교신저자