This study reports an analytical investigation on the development of SB4-grade separated concrete median barriers. The proposed barrier sections comprise three designs, with heights of 810, 1000, and 1270 mm and upper widths of 90, 120, and 120 mm, respectively. Before conducting collision analyses on the proposed sections, the considered collision analysis model was validated using real collision test results; the model was found to accurately predict the real collision test results. The proposed cross-sections were modeled to perform collision analysis according to SB4-grade collision conditions. Results indicated that increasing the cross-section height increased the damaged area and decreased the strength, while the occupant protection performance remained mostly unaffected. Furthermore, the proposed cross-sections met the strength and occupant protection performance criteria specified in domestic guidelines, suggesting their suitability as a separated concrete median barrier for bridges.

1. 서 론
2. 제안 단면의 방호성능 기준
    2.1 제안 단면
    2.2 콘크리트 방호울타리 성능평가 기준
3. 충돌해석 모델
    3.1 차량 모델
    3.2 재료모델
    3.3 충돌해석 모델링
4. 충돌해석 결과
    4.1 충돌해석모델의 검증
    4.2 강도성능
    4.3 탑승자보호성능
5. 결 론
감사의 글
REFERENCES

• 주봉철(한국건설기술연구원 구조연구본부 수석연구원) | Joo, Bongchul (Senior Researcher, Korea Institute of Civil Engineering & Building Technology, Goyang, Korea)
• 홍기남(충북대학교 토목공학부 교수) | Hong, Kinam (Professor, Department of Civil Engineering, Chungbuk National University, Cheongju, Korea)
• 지상원(충북대학교 토목공학과 박사과정) | Ji, Sangwon (Ph.D. Student, Department of Civil Engineering, Chungbuk National University, Cheongju, Korea)
• 한민철(청주대학교 건축공학과 교수) | Han, Mincheol (Professor, Department of Architectural Engineering, Cheongju University, Cheongju, Korea)