Research On Technical Applicability Of Waste Tires In Traffic Safety Protection Facilities

Traffic safety protection facilities are an important part of the traffic safety facilities system,which can effectively protect the safety of passengers and reduce the severity of accidents.The optimization and improvement of traffic safety protection facilities is of great significance for the improvement of traffic safety hidden dangers and traffic safety facilities system.In this paper,typical traffic safety hidden danger points are selected as the research object,and the applicability of common traffic safety protection facilities is analyzed by using the finite element method.Combined with the recycling status of waste tire resources,it is proposed that waste tire and its recycled rubber low-cost materials should be used in the optimization design of traffic safety protection facilities.Firstly,this paper briefly introduces the accident characteristics and the current situation of protective facilities in the section with potential traffic safety hazards,as well as the finite element method for the applicability analysis of traffic safety protective facilities,and discusses the reasons for selecting waste tires and recycled rubber materials as the basis for the optimal design of protective facilities.At the same time,combined with the mechanical test data,the super elastic constitutive model of recycled rubber was fitted,which provided the research method and basic data preparation for the follow-up work.Secondly,this paper studies the applicability of protective facilities from three aspects: guardrail,anti-collision bucket and guardrail end,and quantifies the protection level of protective facilities.In the aspect of guardrail,it mainly includes the research on the column resistance mechanism of the guardrail in the curved slope section and the applicability of the protection ability after the vehicle is out of control in the long and long downhill section,and obtains the limit protection ability of the guardrail in different scenarios for different vehicle types.The finite element method combined with smoothed particle hydrodynamics(SPH)is proposed to analyze the protection mechanism of the anti-collision bucket,and the mechanism and causes of the collision accident between the vehicle at the entrance section of the tunnel and the triangles are analyzed.In the aspect of guardrail end,it mainly analyzes the mechanism and applicability of the accident that the end of the corrugated beam guardrail pierces the body and the vehicle collides with the end of the concrete guardrail.The research results provide an effective and reliable method for the applicability analysis of the protection capacity of the protection facilities in the section with traffic safety hazards,and provide an improvement basis for the traffic management and the optimization design of the protection facilities.Finally,combined with the applicability analysis results of traffic safety protection facilities,the waste tires and their recycled rubber materials with low cost and superior performance are selected to optimize the design of protection facilities.It includes the research on the mechanism and applicability of the direct application of waste tires in protective facilities,and puts forward targeted optimization and improvement measures and suggestions for the direct application of waste tires.At the same time,combined with the superior characteristics of recycled rubber materials,based on the hybrid cellular automata(HCA)topology method and the parameter optimization design method of the meta model,the new type of recycled rubber resistance block and new type of anti-collision bucket with high comprehensive benefits and great practical application value are designed,and the excellent and reliable protection effect is obtained through the simulation analysis and calculation.Finally,the topology parameter integrated optimization design method of new protective facilities structure and the comprehensive utilization system of waste tire resources in traffic safety protective facilities are formed.