All Issue

2021 Vol.34, Issue 3 Preview Page

Research Paper

Analysis of Ultimate Rockfall Energy Resistance of CFT Rock Shed Main Frame

CFT 피암터널 주구조체의 극한 낙석에너지 저항능력 분석

Jiho Moon1*
,
Juho Lee2
,
Jong-Keol Song3
문 지호1*
,
이 주호2
,
송 종걸3
1Assistant Professor, Department of Civil Engineering, Kangwon National University, Chuncheon, 24341, Korea
2Staff, Track Department, Seohyun Engineering Co., Anyang, 13943, Korea
3Professor, Department of Civil Engineering, Kangwon National University, Chuncheon, 24341, Korea
1강원대학교 건축·토목·환경공학부(신산업개발 T-EMS 융합학과) 조교수
2서현기술단 궤도사업본부 사원
3강원대학교 건축·토목·환경공학부 교수
*Corresponding Author
30 June 2021. pp. 129-135
PDF XML Citation
Abstract

Rock sheds are a type of rockfall protection facility that is installed on the road near steep slopes, where large amount of rockfall is expected. Rock sheds are generally designed to resist approximately 200 kJ to 3,000 kJ of rockfall energy. In a previous study, a new type rock shed structure having a concrete-filled tube (CFT) main frame was proposed. By using CFT as the main frame in a rock shed, rapid construction is possible. Additionally, high load carrying capacity and ductility can be achieved. The behavior of the proposed rock shed structure was studied via elastic analysis with the equivalent static load of rockfall energy as in a previous study. However, it is necessary to investigate the behavior of the proposed rock shed in more detail with a full 3D finite element (FE) model considering realistic rockfall load. The FE model for the CFT rock shed main frame was developed first in this study. Then, the resistance of the CFT rock shed main frame Under ultimate rockfall energy was investigated.

Keywords
rock shed
concrete-filled tube
rockfall energy
rockfall resistance analysis

피암터널은 낙석방지시설 중 하나로 비교적 큰 낙석이 발생할 수 있는 급경사지 도로위에 건설된다. 일반적으로 피암터널은 약 200kJ에서 3,000kJ 까지의 낙석에너지에 저항할 수 있도록 설계된다. 기존 연구에서 이러한 피암터널의 효율성을 증대하기 위하여 콘크리트 충전강관(CFT, Concrete-Filled Tube)를 주구조체로 사용하는 신형식 피암터널을 제시하였다. CFT를 주구조체로 활용함으로서 급속시공이 가능하며 높은 하중저항 능력과 연성 또한 확보할 수 있는 장점이 있다. 하지만, 기존 연구에서는 선현 탄성 해석을 통하여 거동을 분석하여 한계를 가지고 있어 보다 실제적인 낙성하중을 고려한 3차원 유한요소해석을 통하여 제안된 피암터널의 거동을 분석할 필요가 있다. 본 연구에서는 먼저 제안된 피암터널 주구조체에 대한 실제 낙석하중을 포함한 3차원 유한요소해석을 개발하였다. 이후 최대 낙석에너지에 대한 제안된 피암터널 주구조체의 낙석 저항능력에 대하여 연구를 수행하였다.

키워드
피암터널
콘크리트 충전강관(CFT)
낙석에너지
낙석 저항능력 해석
References
1
ABAQUS (2018) ABAQUS Analysis User's Guide.
2
Berthet, R., Mazars, J., Daudevile, L. (2003) Numerical Modeling of Rockfall Impacts on Reinforced Concrete Slabs for the Design of New Rock Sheds, Laboratoire Sols Solides Structures, Grenoble, France.
3
Demartino, C., Xu, J.J., Wu, J.G., Wang, X.Y., Ding, J.C., Xial, Y. (2017) A Comparison of the Impact behavior of RC and CFT Circular Columns Under Lateral Impact Loading, Conference of Advance in Structural Engineering and Mechanics(ASEM17). 10.1016/j.ijimpeng.2017.06.011
4
Japan Road Association (2000) Manual for Anti-Impact Structures Against Falling Rock, Japanese Society of Civil Engineers, Tokyo.
5
Krsitian, S. (2009) On the Design of Rockfall Protection Galleries, Institute of Structural Engineering Swiss Federal Institute Technology Zurich, p.170.
6
Lee, J., Lee, H.-D., Song, J.-K, Moon, J. (2020) Design and Static-Performance Evaluation of Concrete-Filled-Tube Rock Shed Structure, J. Korean Soc. Hazard Mitig., 20(5), pp.165~173. 10.9798/KOSHAM.2020.20.5.165
7
Ministry of Land Infrastructure and Transport, MOLIT (2008) Road Rockfall Prevention Facility (In Korean).
8
Ministry of Land Infrastructure and Transport, MOLIT (2011) Road Facilities-Tunnel (In Korean).
9
Ministry of Land Infrastructure and Transport, MOLIT (2020) Rules for Road Structures and Facilities (In Korean).
10
Moon, J., Roeder, C.W., Lehman, D.E., Lee, H.-E. (2012) Analytical Modeling of Bending of Circular Concrete-Filled Steel Tubes, Eng. Struct., 42, pp.349~361. 10.1016/j.engstruct.2012.04.028
11
Park, H., Jang, H., Kim, B., Moon, J. (2020) Study on a Standardized Rockfall-Protection Fence for Various Rockfall Impact Energy using Finite Element Analysis, J. Comput. Struct. Eng. Inst. Korea, 33(5), pp.297~302. 10.7734/COSEIK.2020.33.5.297
12
Sierakowski, R.L. (1997) Strain Rate behavior of Metals and Composites, Conference of IGF.
13
Shi, S.Q., Wang, M., Peng, X.Q., Yang, Y.K. (2013) A New-Type Flexible Rock-Shed under the Impact of Rock Block Initial Experimental Insights, J. Natural Hazards & Earth Syst. Sci., 13, pp.3329~3338. 10.5194/nhess-13-3329-2013
14
Suk, J., Lee, J., Kim, Y., Moon, J. (2014) A Study on Design Criteria of Rockfall Protection Fence Considering Reliability Index, J. Tunnel & Undergr. Space, 24(4), pp.275~281. 10.7474/TUS.2014.24.4.275
15
Yang, J., Chen, Y., Zhang, Z., Luo, Y. (2016) Falling Weight Impact Test of a New-Type Flexible Rock-Shed, J. Eng. Rev., 38(2), pp.242~252. 10.30765/er.38.2.12
16
Yosida, H., Nomur, T., Wyllie, D.C., Morris, A.J. (2007) Rockfall Sheds-Application of Japanese Designs in North America, Conference of North American landslide.
Information
  • Publisher :Computational Structural Engineering Institute of Korea
  • Publisher(Ko) :한국전산구조공학회
  • Journal Title :Journal of the Computational Structural Engineering Institute of Korea
  • Journal Title(Ko) :한국전산구조공학회 논문집
  • Volume : 34
  • No :3
  • Pages :129-135
  • Received Date : 2021-04-13
  • Revised Date : 2021-04-27
  • Accepted Date : 2021-04-29
  • DOI :https://doi.org/10.7734/COSEIK.2021.34.3.129
Journal Informaiton Journal of the Computational Structural Engineering Institute of Korea Journal of the Computational Structural Engineering Institute of Korea
Online Submission
  • NRF
  • KOFST
  • crossref crossmark
  • crossref cited-by
  • crosscheck
  • orcid
  • open access
  • ccl
Journal Informaiton Journal Informaiton - close