Simulation analysis for collision characteristics of concrete barriers on montane highway

In order to explore the collision characteristics of interrupted type and continuous type concrete barriers on montane highway, a integrated model of automobile-barrier-passenger-seat-safety belt was established by dynamic explicit finite element method(EFEM) and VPG software. The collision process analysis for four kinds of typical montane highway concrete barriers was carried out. It is pointed that when interrupted type concrete barrier is crashed by truck, concrete frusta blocks wheel, even right front wheel is divorced from truck, dummy's head and chest suffer from violent impact, and cab deformation is severe; however, when continuous type concrete barrier is crashed by truck, the hoist phenomenon of left rear wheel and the turning over trend of truck are obvious, but the height variety curve of truck tail shows that the hoist of left rear wheel does not continue over a certain height, and the wheel return to ground gradually, that's to say, the height variety trend of truck tail is stability; as the height of convex barrier flange at bottom is 80 mm, the front wheel of truck can smoothly climb up and slip away concrete barrier slope, but the rear wheel of truck can't climb up concrete barrier slope; while the height of convex barrier flange at bottom is 150 mm, the front wheel and rear wheel of truck can't climb up concrete barrier slope. Analysis result indicates that interrupted type concrete barrier is short of inducing ability to losing control vehicle, the convex flange of continuous type concrete barrier at bottom is too high to be climbed by truck, and it's necessary to optimize its main structure parameters.