A Study on the Impact between Car to Circular Concrete Pole

Abstract

The impacts between car to concrete pole occurred frequently in traffic accident, those accidents usually result in severe car damage and widespread power failure. In order to learn the dynamic response of car to concrete pole impact and fracture mechanics of concrete pole, a finite element model of vehicle-pole collision was developed and validated. Then, three impacts between car and concrete pole under the different speed was carried out. The results show that the maximum longitudinal intrusion of the vehicle increased 13.9% as the speed increasing from 30 to 70km/h, while the proportion of absorbing energy by car to the total kinetic energy decreased from 43.6% down to 14.6%. The concrete poles are damaged in all cases due to the shear force, and the damage degree and break-point of pole are different at three speeds. This provides a helpful reference to the design of frontal car body and the concrete pole strength design in impact loading.