Research On Optimization Design And Application Of The Structure Of F-Shape Traffic Signs

Traffic signs are a kind of security facilities used to convey traffic information to the highway users by means of text and graphic symbols through certain structural supports.With the rapid development of urban road traffic in China,the three-dimensional road network is highly intensive,the number of traffic signs is increasing,and the role of traffic signs structure is becoming more and more important.At present,the domestic traffic signs structure design theory is not perfect,most areas are designed according to experience,and the design standards are also different.After investigation found that the market structure of traffic signs to meet the specifications at the same time,a large part of its material is mainly used for bearing weight,often size is too large,the unnecessary waste of materials,also did not give full play to the material utilization potential.Therefore,the optimization design of traffic signs structure is of great economic significance and market demand.The main contents of this paper are as follows:(1)After market research,the structure of F-shape traffic signs used in the market has been counted and arranged,and the material,structure,section form and size of the object have been determined.(2)According to the specification limit state design method based on probability theory,according to the bearing capacity limit state and limit state design of the structure of F-shape traffic signs strength,stiffness and stability checking.(3)The finite element model of the structure of F-shape traffic signs is established by the finite element software ANSYS.(4)On the basis of meeting the requirements of the specification,using the parametric design language ANSYS of APDL,the optimized design,analysis files and command flow of the control files are written.(5)Optimize the selected research objects,and analyze and check the optimization results.(6)The steel structure design module STS in PKPM software is used to compare and analyze the results.After the above research,the following main conclusions are obtained:(1)The structure of F-shape traffic signs stress mainly concentrated in the beams and columns of the root,the maximum deformation is mainly concentrated in the end of the beam and column.(2)By optimizing the structure of F-shape traffic signs,the amount of steel used in the structure can be reduced by 49.80%~66.20%.(3)Through the analysis of different sections of the structure of F-shape traffic signs optimization design results shows that under the same conditions the amount of steel,of circular cross-section of the structure of F-shape traffic signs optimization more space,can reduce the consumption of steel,and the optimization results tend to be more variable section.(4)Through the analysis of different size the structure of F-shape traffic signs optimization design results shows that in the same column and beam section size under the same condition,the shorter the length of the beam,optimizing the structure of the space is larger,the optimization results tend to be more variable section.(5)We can see from the optimization results under different working conditions,the minimum limit of beam and column thickness are basically at or near the specified value,therefore the component thickness is the structure of F-shape traffic signs is an important parameter in the design of weight control structure.(6)The checking module of STS steel structure finally optimization design used in the PKPM,and the calculation results and original results are briefly compared,difference range was less than 5%,indicating that ANSYS the structure of F-shape traffic signs optimization result is accurate and reliable based on.