| Title |
Vehicle Collision Performance Investigation of Open-Type Guardrails for High-Speed Section Grade B Using High Corrosion-Resistant Alloy-Coated Steel Sheets |
| Authors |
노명현(Noh, Myung Hyun );이상열(Lee, Sang Youl) |
| DOI |
https://doi.org/10.12652/Ksce.2025.45.1.0029 |
| Keywords |
고속구간 B등급 가드레일; 충돌 수치해석; 고내식 도금강판; 실차충돌시험 |
| Abstract |
High corrosion resistance hot-dip alloy plated steel sheets are new materials with excellent corrosion resistance and have 5 to 10 times more corrosion resistance than conventional hot-dip galvanized steel sheets. In developed countries, the demand for high corrosion resistance hot-dip alloy plated steel sheets has recently increased significantly, but in Korea, there are relatively few cases of applying such high corrosion resistance steel sheets to road safety facilities. In this study, the optimal specifications of the high-speed B-grade guardrail applied with a highly corrosion-resistant hot-dip zinc aluminum magnesium alloy-plated steel sheet were derived, and the crash and structural performance were investigated by performing a real-vehicle crash test and numerical analysis. The existing SB2/SB4 grade adopted open-type guardrails that are commercially available without change to the SB3-B/SB5-B grade, and the optimization process was performed through crash analysis using LS-DYNA. As a result of the rail arrangement design, visibility was secured by arranging the upper, middle, and lower rail heights at equal intervals, and the shock-absorbing blockout was designed integrally to secure both passenger protection performance and strength performance. As a result of the actual vehicle collision test, both small and large vehicles passed the high-speed section B-grade performance evaluation criteria, and both numerical analysis and crash test results met the allowable values. Therefore, it was analyzed that the B-grade guardrail with the highly corrosion-resistant plated steel sheet proposed in this study secured corrosion resistance and sufficient collision performance for the high-speed section. In addition, the results derived from this study show that if the optimal specification is derived through variable analysis based on crash analysis, the risk of failure of the collision test can be reduced and development costs can be reduced. |