Research On Cable-Girder Anchorage Fatigue Test Program Of Railway Steel Box Girder Bridge

With the development of long-span cable-stayed bridge in China, the requirements on the cable-girder anchorage of a long-span cable-stayed bridge are getting higher and higher. Because of the cable-girder anchorage of cable-stayed bridges force concentrated, complex structure, is a key part of the control design, and also the fatigue of key positions. Therefore, understanding the way of cable-girder anchorage force transmission, and grasp the stress distribution is very important.Yongjiang railway extra long-span cable-stayed bridge uses the anchor-box type of cable-girder anchorage structure. The difference between this anchor-box and traditional anchor-boxes is that the support plates connect with both of the fairing plate and web plate. This anchor-box is designed novel, so it’s necessary to do a research on the fatigue behavior of this structural form under the railway load. This thesis is based on the Yongjiang rail-way extra long-span cable-stayed bridge, through the finite element analysis method to design program of the anchor-box fatigue performance research. The research content of this thesis is to study the preparatory work of YongJiang bridge cable-girder anchorage fatigue performance, and also study the force transmission and stress distribution of this new structure. The specific work is as follows:1. Through the finite element software to calculate the whole bridge, use the cable force state and live load of cable force to confirm the test load of the anchor-box fatigue test.2. Through the finite element software to calculate and analyze the anchor-box of the Yongjiang Bridge, realize the force transmission and stress distribution of this anchor-box.3. Design the model of the fatigue test, and through the experiment model and the Yongjiang bridge anchor-box of analysis to proving the model equivalent.