네트형 토석류 방호시설에 작용하는 충격에너지에 따른 앵커부 인장력 산정

초록

In order to ensure the stability of net protection system for debris flow, not only the design of net but also the design of anchor which is supporting whole system is of equal importance. However, as the tensile forces acting in the anchor vary according to the net types and the energy absorption, it is not easy to design the anchor capacity for this protection system. The guidelines for anchor design are also not established yet in Korea. In this study, a specific brake frame was developed for this system and the energy absorption by the brake frame was estimated based on static load test. Based on full scale impact tests, the deformation of net protection system and tensile forces in the anchors were analysed according to impact energy level. Generally, as the impact energy increases, not only the maximum displacement of the protection system and the energy absorption by the brake frame increase, but the tensile forces acting in the anchor also increase. Based on the experimental results, an empirical relationship between the impact energy and tensile force was established which can be used in anchor design. The results obtained from this study are planned to be utilized for design of anchor in the future.

키워드