Impactanalysis Of Bridge Floor System For Through Bridge’s Stress Performance

Through bridge has been developed and applied for many years in our country,design theory and construction technology is very mature, but with the increase of thetraffic and vehicle load, the ability of bridge service has been challenged. In recent years,The suspenders of bridge occur fracture accidents constantly during the bridges are inservice, arch bridge safety problems cause the attention of the whole academe.Thispaper focus on the bridge deck system, to explore the different forms of bridge floorsystem affect the bearing capacity of through bridge.In this paper, using the infinite element software ANSYS to establish the model ofarch bridge, changing bridge floor system structure by adding girder, do the followingwork:First of all, the whole bridge structure under dead load or full load, make thepreliminary evaluation. Then compare the axial force in different deck system influenceline. Lay on vehicle load, compare the axial force value. Then by changing the size ofthe beam cross-section, longitudinal stiffness influence of Suspender Force. Finallyanalysis the load position suspender failure, suspender stress nearby.Choose the bridge, a quarter of span length and cross section, respectively on thethree cross section along the lateral position arrangement of vehicle load, different lanesof different floor system in the derrick axial force value and longitudinal beam bendingmoment, shear force, and analyzes the cross section in a pair of derrick axial forcedistribution law. And then discusses the load transverse distribution on two pieces ofarch rib, and compared with the traditional lever principle method with the distributionof live load.Established a suspension bridge model with the same geometry size, analyzed theaxial force influence line, and the effect on axial force of suspension bridges andthrough bridge. Discuss the different constraint of the suspenders.