PURPOSES: This study, compared and verified the test results of post-bearing capacity and the test results of a full-scale vehicle crash test on flat ground and slope ground. METHODS: The results of the bearing capacity test on the barrier post show that, the bearing capacity of the banking section ground and flat ground was relatively large. In the full-scale vehicle crash test, the maximum deformation of the barrier was not large, and the occupant safety indexes(THIV, PHD) were relatively similar. The post-bearing capacity test is a static load test. RESULTS: Therefore, there was a large difference on the flat ground and on the banking section ground because of the effect of soil failure. On the other hand, the full-scale vehicle crash test is close to the impact load. CONCLUSIONS: Therefore, it can be concluded that the whole barrier system was not affected by soil failure alone.

항공기 연료셀은 추락 상황에서 승무원의 생존성과 직결되는 중요 구성품으로 회전익 항공기에 적용되고 있는 내충격성 연료셀은 추락시 승무원의 생존성 향상에 큰 역할을 하고 있다. 미육군은 항공기가 처할수 있는 다양한 상황에서 연료셀이제 기능을 발휘할 수 있도록 1960년대 초부터 MIL-DTL-27422 이라는 연료셀 개발규격을 제정하여 현재까지 적용해 오고있다. 해당 개발규격에 규정된 시험 중에서 충돌충격시험은 연료셀의 내충격 성능을 검증하는 시험으로써, 해당 시험을 통과하는 연료셀은 생존가능 충돌환경에서 화재가 발생하지 않아 승무원의 생존성이 대폭 향상될 수 있음을 의미한다. 그러나 충돌충격시험은 작용하는 하중 수준이 너무 높기 때문에 실패 위험성이 가장 큰 시험이기도 하다. 연료셀이 해당 시험을 통과하지 못하는 경우에는 재시험을 위한 비용과 준비기간이 상당히 소요되어 항공기 개발일정에 심각한 지장을 초래할 가능성도 높다. 따라서, 연료셀 설계 초기부터 내충격성능 만족여부에 대한 예측을 위해 충돌충격시험의 수치해석을 통한 실물시험에서의 실패 가능성을 최소화해야 한다는 필요성이 제기되어 왔다. 본 연구에서는 충돌모사 프로그램인 LS-DYNA에서 지원하는 유체-구조 연성해석 방법인 SPH 방법을 사용하여 연료셀 충돌충격시험 수치 모사를 수행하였다. 수치해석 조건으로 MIL-DTL-27422에서 요구하는 시험조건을 고려하였고, 실물 연료셀의 시편시험을 통해 확보한 물성데이타를 해석에 반영하였다. 그 결과로 연료셀 자체의 응력수준을 평가하고 취약부위에 대한 고찰을 수행하였다.

According to a statistics, a number of traffic accident by bridge pier and independent fixed object crash accident has been increased. we evaluated a car damage and passenger injury through vehicle accident reconstruction test of independent fixed object crash accident. A damage of crash accident car based on accident investigation report was similar to demage of 27km/h reconstruction test car, and therefore we can find the speed of crash accident car is 20km/h～30km/h. It is very low that the skull fracture and injury possibility of AIS 4 above in 37km/h and 27km/h reconstruction test car. It is very high that injury possibility in 70km/h reconstruction test car. Also, it is not high that impact of the driver and passenger's lower body(thigh, shin, ankle) in 37km/h and 27km/h reconstruction test car. On the other hand, it is very high that impact of head, chest and thigh of the driver and passenger in 70km/h reconstruction test car.

In this study, the performance of a steel-FRP composite bridge safety barrier was evaluated through the vehicle crash test. Glass fiber and polyester resin were used for FRP. The structural strength performance, the passenger protection performance, and the vehicle behavior after crash were evaluated corresponding to the vehicle crash manual. As the result, A steel-FRP composite safety barrier was satisfied with the required performance.

Since 1960 tankers and bulk carriers have rapidly increased in size up to 500, 000 dwt. in operating as main system of transportation for the international trade at sea, and studies are doing carried out by various groups with a view to increasing the size still further. However, the service speed of these ships has remained almost constant, and steering devices of them have nearly not changed, comparing with regular size of a dry cargo ship. This creats the dituation where stopping distance and advance are proportionally longer for larger ships. In case of collision at sea, these vessels have been arised some serious casualties, such as sinking, fire and oil pollution. This paper analyzers a study for the handling of super huge vessels to avoid collision at sea, basing on the results of the crash astern test and turning test of them.