Analysis On Structure Of Steel-Concrete Joint Section In Hybrid Girder Rigid Frame Bridge

In today’s bridge community, rigid frame bridge has been widely used.The span of midspan of the traditional rigid frame bridge is limited by the weight of midspan, in order to increase the span of midspan, bridge engineers use steel box girder take place of concrete box girder in the middle of midspan to form hybrid girder. In order to transfer force from steel box girder to concrete box girder, we must build steel-concrete joint section at the location of the steel box girder and concrete box girder connection, steel-concrete joint section is the weakness of the hybrid girder rigid frame bridge, so it is necessary to study structural design of steel-concrete joint section.Taken the Oujiang bridge on the extension project of Wenzhou section of Zhuyong highway as the background, Using the finite element software of ANSYS build model of steel-concrete joint section with different structure on the base of Oujiang bridge, the main research of this paper are shown as following:(1)Using the finite element software of MIDAS build the full-bridge model of Oujiang bridge, using the finite element software of ANSYS build partial model of steel-concrete joint section with different structure.(2)In the full-bridge model, take the static analysis under the dead load to get the boundary displacement of the partial model of steel-concrete joint section.(3)According to the result of partial model of steel-concrete joint section with same length and different bearing plate structure, evaluated the reasonableness of steel-concrete joint section with same length and different bearing plate structure by comparing the stress distribution and force transmission of steel-concrete joint section.(4) According to the result of partial model of rear bearing plate structural steel-concrete joint section with different length, evaluated the reasonableness of rear bearing plate structural steel-concrete joint section with different length by comparing the stress distribution and force transmission of steel-concrete joint section.