This study dealt with truck crash performance evaluation of new guardrails made of PosMac steels considering the ground bearing capacity effect. Subsequent crash simulation results for SB2 and SB4 grades present that the developed model performs much better in containing and redirecting the impacting vehicle in a stable manner. In this paper, the existing finite element crash analysis of guardrails using the LS-DYNA program is further extended to study the nonlinear dynamic response of the guardrail structures with new type poles supported by external stiffeners. The numerical results for various parameters are verified by comparing different grades with displacements occurred in the barrier from the crash simulation.

1. 서 론
 2. Spring 모델링에 의한 지반지지력 산정
 3. 수치해석 및 결과분석
  3.1 해석 모델
  3.2 대형차 충돌 해석
 4. 요약 및 결론
 REFERENCES

• 노명현(포스코 철강솔루션마케팅실 구조연구그룹 책임연구원) | Noh Myung-Hyun
• 이상열(안동대학교 토목공학과 부교수) | Lee Sang-Youl Corresponding author