Browse > Article
http://dx.doi.org/10.12652/Ksce.2020.40.5.0445

Development of an Energy-Absorbing Device for a Crashworthy Sliding Post  

Noh, Min-Hyung (Korea Institute of Civil Engineering and Building Technology)
Jang, Dae-Young (Korea Barrier co., Ltd.)
Lee, Sung-Soo (Kongju National University)
Han, Ki-Jang (DS Global co., Ltd.)
Publication Information
KSCE Journal of Civil and Environmental Engineering Research / v.40, no.5, 2020 , pp. 445-454 More about this Journal
Abstract
Non-breakaway crashworthy sliding posts move rigidly with a vehicle in the early stage of vehicle impact. During this stage, a vehicle imparts its linear momentum to the post, experiencing first-stage speed loss followed by second-stage loss from the crush of the energy-absorbing pipe (EAP) installed under the guide rail. An EAP is the key element of a crashworthy sliding post and should be confined to the post foundation. This paper covers the development of an EAP for a sliding post of 507 kg, which is a sliding post type frequently used in Korea for cantilever signs. Detailed explanations of the designs for an EAP structure using LS-DYNA impact simulation are given, and the crashworthiness of the systems are confirmed through crash tests. The EAP presented in this paper can accommodate impacts from 0.9 ton-60 km/h to 1.3 ton-80 km/h, and is applicable to foundations up to 2.7 m in length.
Keywords
Sliding post; Crashworthiness; Energy-absorbing pipe; LS-DYNA; Impact simulation; Crash test;
Citations & Related Records
연도 인용수 순위
  • Reference
1 American Association of State Highway and Transportation Officials (AASHTO) (2009). Manual for assessing safety hardware, Washington, D.C.
2 American Association of State Highway and Transportation Officials (AASHTO) (2011). Roadside design guide, Washington, D.C. pp. 4.1-4.17.
3 Bligh, R. P., Ross, H. E. and Bullard, D. L. (1994). Test and evaluation of Arizona slip-away base luminaire supports, FHWA-AZ94-386, Texas Transportation Institute, Texas.
4 British Standard (BS EN 12767) (2007). Passive safety of support structure for road equipment-requirements, classification and test methods, UK.
5 Dinitz, A. M. and Chisholm, D. B. (1978). "Development and testing of a breakaway support coupling for light poles." Transportation Research Board, Transportation Research Record, Vol. 679, pp. 26-28.
6 Elmarakbi, A. and Fielding, N. (2009). "New design of roadside pole structure: Crash analysis of different longitudinal tubes using LS-DYNA." 7th European LS-DYNA Conference, University of Sunderland, Sunderland, UK.
7 Elmarakbi, A., Sennah, K., Samaan, M. and Siyira, P. (2006). "Crashworthiness of motoer vehicle and traffic light pole in frontal collision." The ASCE Journal of Transportation Engineering, Vol. 132, No. 9, pp. 722-733.   DOI
8 Fricke, L. B. (1990). Traffic accident reconstruction, Traffic Institute Report, Northwestern University, Evanston, Illinois.
9 Ko, M. G., Kim, K. D., Kim, K. J., Sung, J. G. and Yun, D. G. (2010). "Crash worthiness of a post with clip-type slip base subject to side impact." Journal of the Korean Society of Road Engineers, Vol. 12, No. 4, pp. 175-186.
10 Livermore Software Technology Corporation (LSTC) (2007). LS-DYNA keyword user's manual, California.
11 Ministry of Land, Infrastructure and Transport (MOLIT) (2014). Roadside design and management (in Korean).
12 Ministry of Land, Infrastructure and Transport (MOLIT) (2016). National road construction design practice standards (in Korean).
13 National Crash Analysis Center (NCAC) (2011). Public finite element model archive, Available at: www.ncac.gwu.edu (Accessed: February 10, 2020), Washington, D.C.
14 Road Traffic Authority Driver's License Examination Office (KoROAD) (2020). TAAS: Traffic accident analysis system, Available at: http://taas.koroad.or.kr/ (Accessed: February 10, 2020).