Abstract:Taking Longgong River Bridge in Jining City of Shandong Province as the research object, firstly, with the help of a professional software Midas/Civil, the integral beam element model is established to determine the internal force value of the steel-concrete joint area. Then, based on the finite element software ABAQUS, the three-dimensional solid model of steel-concrete joint section is established to carry out the refined analysis, and to clarify the stress field distribution of steel box girder and concrete beam in this section. The research shows that the stiffness transition of the steel-concrete composite section of the main beam of the bridge is smooth, the force transmission mechanism is reasonable, and the safety reserve is good, which can meet the stress needs of the bridge and ensure the structural safety of the cable-stayed bridge.
