Research On Collision Simulation Between Bus And Class A Concrete Guardrail

In recent years,during the rapid development of the Chinese economy,it is necessary to strengthen the construction of traffic safety facilities and provide a safe and comfortable driving environment in the current social environment.As the road is repaired year by year,the protective performance of the old reinforced concrete guardrail is weakened.In the event of a collision,the vehicle may go out of the road and cause serious secondary injuries.In view of this situation,compared with reinstalling the new guardrail,rational design and optimization of the old guardrail can save construction time and resources.In order to study the reinforcement scheme of old concrete guardrails with anti-collision level A and the protection performance of concrete guardrails with different cross-sectional shapes,the actual status and structural type of first-class concrete guardrails were investigated.A single-slope guardrail was selected and the design of the reinforced guardrail Solution,then establish the finite element model of the guardrail and the passenger car,use ANSYS Workbench software to import the established finite element model,and control the test parameters of the simulated collision.The passenger car model is subjected to the simulated collision test at the specified initial speed and collision angle to obtain The bus has accelerations of 148.2 m/s~2and 206.5 m/s~2in the x and y directions,respectively,and the maximum deformation of the guardrail is 6.74 mm.The protective performance of the reinforced guardrail is comprehensively analyzed from the track of the vehicle.Then,the crash tests of the straight-wall and F-type concrete guardrails with anti-collision level A are performed under the same conditions,and the simulation results are compared and analyzed.The results show that the anti-collision performance of the old concrete guardrail structure reinforced according to the design scheme is improved,and the vehicle can be effectively protected.Compared with straight-wall concrete guardrails,F-type concrete guardrails have better anti-collision performance,safety performance and guiding performance.Through the research on the protection performance of A-level concrete guardrails and the reinforcement scheme of old guardrails,it provides a reference for the selection of road guardrail types and the improvement of guardrails in the future.