Anchorage Zone Stress Research Of Cable-Stayed Bridge Spaning Railway In Center Of Zhengzhou City

In recent years, the graceful cable-stayed bridge has been widely used in our country for its unique shape and bounds superior capabilities. the anchorage zones between the box beam and cables of a cable-stayed bridge are key to a bridge design due to their complicated composition and bearing great cable forces. It is very important to know the stress distribution of the anchorage zones under calbe forces.First, the development of cable-stayed bridge and the main structural types of the anchorage zones between the box beam and cables are described in this thesis, then, the proccessing method of prestressing force and the mesh of complicated structure are introduced. A cable-stayed bridge in Xuzhou was taken as research background, the plane finite element model is established and the careful simulation analysis of the entire construction process of the bridge is carried out. The impact of stress and deformation at each construction stage and filished stage are considered under all kinds of construction loads. The whole bridge' s stress and deformation characteristics are analyzed under long-term combination, under the short-term combination and under the standard combination. The most disadvantageous segments are obtained from above results. Using large-scale finite element software ANSYS, the three dimensional simulation computation of the anchorage zone is performed, the stress distribution of the anchorage zone is analyzed under the action of the cable forces, the three-dimensional prestressing forces, the dead load and the internal forces of beam cross-section.