Crashworthiness and structural analysis of Jingha guardrail

the crashworthiness of standard 94 version barrier of Jingha Expressway is poor, which cannot meet the collision protection requirements of JTG B05-01-2013. The finite element model of the existing standard wave beam guardrail, improved wave beam guardrail, and vehicle models were established respectively to study the crashworthiness of guardrail. Vehicle models include small passenger car, medium passenger car and large truck. The crashworthiness of different scheme guardrails was analyzed on five aspects: energy absorption, barrier, guiding, lateral dynamic deformation and occupant safety. Based on the analysis of the simulation test results, the existing guardrails were structurally improved. Comparing the simulation test results of the original guardrail and the improved guardrail, it is concluded that the existing standard guardrail can no longer meet the energy absorption requirements under a certain speed. The improved guardrail is likely to cause excessive deformation and drill-down accidents when some vehicles collide with it. The collision energy absorption of the double-wave board guardrail collision with the small passenger car, medium passenger car and large truck improved by the improved structure increased from 58.1KJ, 362.1KJ, 155.8K to 243.32KJ, 1439.7KJ, 444.28KJ, and the lateral dynamic deformation of the collision was 1070.6mm, 1158.9mm, 985.54mm reduced to 327.3mm, 715.73mm, 935.13mm. The crashworthiness indicators of the structural optimization guardrail can meet the safety protection requirements.