Force Performance Study Of Truss-Arch Bridge In Active

Concrete truss-arch bridge is a bridge between truss bridge and arch bridge, It’s advantage included truss bridg and arch bridg. Concrete arch bridge truss type combination with ordinary truss arch bridge the difference between a pillar top lever in bent and cross in proper position disconnect, form arch structure among, both sides for truss beam structure. The structure besides having coagulation truss arch bridge outside the advantage, still can reduce the tension of the pier and bent stem horizontal thrust, let on both sides of the truss beam structure more reasonable force.In the investigation of the using of truss-arch bridge in our county, It’s been founded that there are appears of diseases after10years. Including the chord and node location of occurrence of crack, cross below the flexible obvious, dynamic performance were so poor must solve the problem, some even have to demolish rebuild. In view of the current situation of the bridge, this paper made several aspects of research:combined with the practical project, according to the latest standards and accurate calculation method of this kind of structure static and dynamic performance made a comprehensive analysis; choose a ordinary arch bridge model building, use of response spectrum and linear dynamic time history method of combining the analysis of truss arch bridge that combination of horizontal and vertical stiffness because small, dynamic performance is far worse than ordinary arch bridge structure of the conclusion; According to the results of analysis, choose appropriate reinforcement method in the same with the original bridge under seismic load time history analysis of linear power, verify the validity of the reinforcement; In the original bridge structure system, it puts forward some Suggestions of the transverse stiffness web members transformation method, set up after the transformation of the whole bridge finite element model, analyzes the dynamic properties of bridge after the transformation,and the original bridge is compared, and the type of the Bridges for active service and the transformation of reinforcement to provide the reference.