Development of crashworthy movable barrier with pretension wire in tube

A new type of crashworthy movable barrier was developed with pretension wire in tube structure, the impact condition and safety evaluation specification of movable barrier were analyzed, finite element models were set up and solved by using LS-DYNA explicit software, and the safety performance of movable barrier was proved by full-scale impact tests. Test result indicates that the crashworthiness of movable barrier reaches 160 kJ, and vehicles come back to normal running performance after impact. Barrier maximum dynamic deformation are 972 mm with car impact and 1 093 mm with bus impact, and the simulation results are 913 mm with car impact and 1 100 mm with bus impact. The exit angles of car and bus are 10.2° and 0° respectively, and the simulation results are 9.1° and 0° respectively. The simulation results are coincident with the test results, and the performance of movable barrier meets evaluation specification.