Comparative Study On The Effects Of Different Reinforcement Schemes For Truss Arch Bridges

Reinforced concrete truss arch bridge is the common type of the arch bridge in medium-small span bridges.With the rapid development of our social economy,constantly improve the bearing capacity of Bridges,many truss arch bridges have been dangerous bridges due to their lack of capacity,so,it is of great practical significance to seek effective reinforcement methods.Firstly,based on the original design and using Midas civil,plane finite element model of Duyun bridge is established to simulate the construction process,and through static analysis under constant load,the live load and load combinations,the main reasons why diseases and deficiencies appear in truss arch bridge are found,that the type of the bridge system itself birth defects.Excessive pursuit of technical indicators for the economy caused many cases of partial bridge collapse component strength not meet the requirements of design,safety reserves low,structure durability poor.Through a combination of lower limb after enlarged cross section method and pasting steel plate method to establish model,the hyperbolic arch bridge under different thickness of reinforcement stress analysis,the research USES the reinforcement effect of different thickness of reinforcement,and the dead load in strengthening phase is removable parts after the reinforcement effect.Compare the enlarged cross section method and pasting steel plate method for both the bridge reinforcement force,after put forward the preferred method for both truss arch bridge with similar Bridges.The comparative analysis it is concluded that increasing section method is more suitable for this bridge,the conclusion of reinforcement effect better.Through the field after the bridge reinforcement load test by using both the reinforcement effect of bridge reinforcement engineering and simulation analysis on the rationality of the use of hyperbolic arch bridge reinforcement project.Practice shows that after reinforcement DuYun bridge not only can meet the requirements of the strength of the city-class B,and there are certain safety stock.