Study On Safety Structure Design Of Road Bridge Guardrail

Road bridge guardrail is to ensure the safety of vehicles and people's lives and property,an important guarantee for the safety of road bridges and bridges construction of the most important,in order to ensure the quality of the guardrail,guardrail to improve the level of protection,the paper will focuson the safety design of the highway bridge A number of key factors to study.Papers on the road bridge guardrail settings are analyzed,and the existing shortcomings of the road bridge guardrail and the factors that cause accidents are analyzed.Aiming at the existing problems of the bridge guardrail,the paper focuses on the metal beam column guardrail as an example to study the structure of the guardrail of the bridge.In view of the fact that the existingnorms provide no connection between the bridge guardrail and the bridge deck,this paper studies the checking method of the connection strength between the bridge guardrail and the bridge deck on the basis of the related standards,and puts for ward the theory Calculation formula,design method and construction requirement.Based on the above design and research,the safety performance of the bridge guardrail was tested and verified.By means of computer simulation of collision and actual vehicle crash test,the connection structure of the metal beam column fence,the bridge guardrail and the bridge deck and the cantilever end of the bridge deck Safety performance verification.According to the test results,the bridge fence structure design and connection structure calculation theory is verified.The bridge guardrail that has been tested should be evaluated by principal component analysis,the evaluation index and evaluation method aregiven,and the conclusion is drawn.Through the improvement of the existing bridge guardrail,the bridge guardrail design method and safety assessment method proposed in this paper have been proved to be able to improve the safety index of the bridge guardrail,which can provide reference for practical application in the future.