This study investigated the embedded depth of guardrail posts through 3-D soil material model and carried out evaluation of the dynamic performance of guard rail. In order to calculate for embedded depth of sloping ground, displacement of guardrail posts is analyzed according to the embedded depth of experiment variables. Through the static test of guardrail posts, the maximum deflection was found to decrease the interval. By performing the dynamic test using the Bogie Car, that is confirmed the elastic modulus of the soil occuring the maximum deflection. Guardrail posts is considered to need for further reinforcement in the larger slope than the plains. This study researched about maximum displacement and deviation velocity through dynamic performance of guardrail system and conducted analysis about protection performance evaluation of passenger.

Abstract
 1. 서론1)
 2. 지주에 대한 정적해석
 3. Bogie Car를 이용한 동적해석
 4. 가드레일의 성능평가
  4.1 충돌기준
  4.2 강도성능평가
  4.3 탑승자 보호성능평가
 5. 결론
 감사의 글
 References

• 양승호(영남대학교 방재연구소 연구원) | Yang, Seung-Ho
• 이동우(영남대학교 방재연구소 연구원) | Lee, Dong-Woo
• 신영식(영남대학교 건설시스템공학과 교수,공학박사) | Shin, Young-Shik 교신저자