Study On Promoting Utilization Of Highway Wave Beam Guardrail Based On Collision Simulation

In recent years,due to the continuous development of my country’s economy and the continuous improvement of infrastructure construction,the volume of road traffic has increased year by year,and the structure of road transportation in my country is also undergoing major changes.In the face of new forms of road traffic,in order to better adapt to the needs of road traffic safety,the Ministry of Transport of my country promulgated and implemented the latest version of the road traffic safety facility design specifications and rules in 2017.The new code has improved the protective strength of the newly built guardrail in terms of structural form,but it does not mention the treatment methods or upgrading and utilization measures of the existing old road guardrail.Because the original road guardrail does not meet the protection requirements of the existing specifications and cannot be used anymore,if the original guardrail is completely removed,it will not only cost a huge amount of money but also cause a serious waste of resources.Based on the principle of safety and sustainable development,this article carried out research on the transformation and utilization of the corrugated beam guardrail on the side of the secondary highway.In this paper,the A-level double-wave corrugated beam guardrail,which is particularly widely used in secondary roads,is researched,and combined with relevant engineering practical experience,two A-level double-wave corrugated beam guardrail reconstruction schemes are proposed.In order to verify the protection capabilities of the two guardrail transformation schemes,Hyper Mesh software was used to construct a finite element model of the collision between the car and the guardrail,and three evaluation indicators for the safety performance of the guardrail were established.After calculation by LSDYNA software,the parameters of the vehicle trajectory,collision force,system energy,collision speed,collision acceleration,guardrail displacement and guardrail stress of the two collision models are obtained.After the collision test analysis of the above collision parameters,and the comparison of the safety performance evaluation indexes of the guardrail,it can be concluded that the two guardrail modification schemes meet the requirements of the indexes.Finally,from the perspective of the response of the guardrail structure,an in-depth quantitative study of the safety of the renovation plan was carried out.On this basis,5key collision indicators were screened out,and the entropy method and the TOPSIS method were used to establish the safety of the guardrail renovation and utilization.Comprehensive multi-index safety evaluation model,the guardrail transformation plan and the protection ability of the A-level guardrail under the new specification are evaluated and ranked.Through the above research,this paper draws the conclusion that two A-level guardrail reconstruction schemes meet various evaluation indicators and corresponding specifications.At the same time,the analysis of the comprehensive multi-index safety evaluation system established based on the entropy method and the TOPSIS method shows that the protection ability of the guardrail transformation scheme 1 is slightly better than that of the Class A standard guardrail under the current specifications,and the protection ability of the Class A standard guardrail is better than that of the current standard.Guardrail transformation plan two.The research in this paper is of great significance to the development of both roadside road safety and road safety facilities upgrade and transformation in China.