Analysis Of The Stress On The Anchorage Zone Of Cable-Stayed Bridge

In recent years, the cable-stayed bridge design, with its unique and beautiful shape and super spanning capacity, has been widely used in China. The beam sections of modern cable-stayed bridges are of large width and various forms. Some times the precise stress distribution can not be obtained with plane analysis. The partial stress caused by large concentrated force is very complicated, in the cable-girder anchorage zones and prestressing tendon anchorage zones. So, the analysis model established suitable or not, the structure internal-force, deformation and the stress though the model established suitable or not, the structure force, the deformation and the stress distribution in the result are directly affect. The force at the anchorage zones of the cable-stayed bridge's main beam is relatively concentrated and its structure is rather complex; therefore, the zones becomes the key part of control design, so that to master the stress distribution on anchorage of the main beam is also very important.This paper first describes the development of the cable-stayed bridge design and the main structure of the main beam's anchorage, focusing on building bridges models by the finite element software and approaches to common problems. Using a certain single plane cable-stayed bridge with oblique single tower in Jiangxi Province as the background, the present paper makes simulation analysis of the construction process of the cable-stayed bridge, using comprehensive procedures BSAS to establish the finite element model of plane frame. The paper finds that the force at the anchorage zone of the main beam is least favorable to segments, by considering the impact of a variety of construction loads on each construction phase of the bridge and the stress and deformation of the bridge, and, in analyzing the stress and deformation of the full bridge under the combination of long-term effects, the combination of short-term effects and the combination of standard effects of the load during the operational phase. Then, this paper analyzes stress distribution on the beam section and anchorage zone under the action of the cable force, the constant load and the internal force of the cross-section of the beam segment, using MIDAS to make spatial numerical simulation of the anchorage zone of the cable-stayed bridge's main beam. The stress distribution data on the anchorage zones of the cable-stayed bridge's main beam by the finite software tend to be safe, as a direct role in practical engineering.