KSCE Journal of Civil and Environmental Engineering Research (대한토목학회논문집)

Korean Society of Civil Engeneers (대한토목학회)
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Performance Assessment for Rockfall Protection Systems I: Performance Assessment Criteria

낙석방지울타리의 성능평가 I: 성능평가기준

  • 김기동 (공주대학교 건설환경공학부) ;
  • 고만기 (공주대학교 건설환경공학부) ;
  • 김달성 ((주)경동엔지니어링 구조부) ;
  • 문병갑 (교통안전공단 자동차안전연구원 첨단안전평가실)
  • Received : 2014.10.08
  • Accepted : 2015.01.16
  • Published : 2015.02.01
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Abstract

The purpose of this study is to suggest performance levels, a test method, and assessment criteria for the performance assessment to allow standardized tests for rockfall protection systems. The range of rockfall impact energy was determined by using domestic rockfall data and a total of 9 performance levels from 50kJ to 1500kJ were suggested. The performance assessment is implemented by two types of full-scale free-fall impact tests to investigate the serviceability and the maximum capacity as in European and American standards. It was considered to be reasonable that the specimens of rockfall protection systems consist of 3 spans and the concrete block of a polyhedron with 26 faces, similar to spheres, impacts at the center of a center span. Assessment criteria were constructed to investigate whether a rockfall penetrated rockfall protection systems and whether the deformed specimen encroached on the roadway or obstructed the vehicle traffic.

본 연구에서는 낙석방지울타리에 대한 표준화된 시험이 가능하도록 성능평가에 필요한 성능등급, 시험방법, 평가기준을 제안하고자 하였다. 국내 낙석자료를 이용하여 낙석에너지의 범위를 결정하고 50kJ에서 1500kJ까지 총 9등급의 성능등급을 제시하였다. 성능평가는 유럽과 미국의 기준과 같이 사용성과 최대성능을 조사하기 위한 2종류의 실물 자유낙하 충격시험으로 이루어진다. 낙석방지울타리의 시험체는 3경간으로 구성되고 구형에 가까운 26면체 콘크리트 블록이 중앙 경간의 중앙에 충돌하는 것이 합리적인 것으로 판단되었다. 시험의 평가기준은 낙석의 관통여부와 변형을 겪은 낙석방지울타리가 도로를 침범하거나 차량통행을 방해할 가능성이 있는지를 검토하도록 구성되었다.

Keywords

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  1. Performance Assessment of Rockfall Protection Fences for the Rockfall Energy of 100 kJ Using ETAG 27 vol.16, pp.2, 2016, https://doi.org/10.9798/KOSHAM.2016.16.2.247