关键词: 交通安全, 护栏端头, 有限元方法, 实车碰撞试验, 波形梁护栏, 碰撞条件

Abstract: Serious accident will happen if car impacts on traditional W-beam guardrail terminal. A new type of W-beam guardrail terminal was invented by conducting FEA(finite element analyse) computer simulation and full-scale impact tests. The performance and mechanics of terminal were analyzed through FEA computer simulation, and the full-scale impact conditions such as impact point and approach angle were also defined by this means. Full-scale impact tests were conducted for the safety evaluation of the new type of W-beam guardrail terminal. The passenger safety was guaranteed by rolling w-beam to absorb accident car's kinetic energy, which can avoid piercing of W-beam into a car or turning over of the accident car. The containment level of standard section of barrier was guaranteed by enough constrain force at guardrail terminal. Full-scale impact test proved that the performance of new type guardrail terminal meets the acceptance criteria.

Key words: traffic safety, guardrail terminal, FEM(finite element method), full-scale impact test, W-beam guardrail, impact condition