Model Test for Local Stress Distribution in Anchorage Zones of Continuous Rigid Frame Composite Arch Bridge

In order to investigate the distribution of local stresses in the anchorage zones of a continuous rigid frame composite arch bridge, model tests for roof and floor anchorage zones were carried out by taking Yichang Yangtze River bridge along Yichang-Wanzhou railway line as the research object, and the experimental results were compared numerical calculation ones. The transfer regularity of local stresses in the anchorage zones was obtained, and causes resulting in cracking in the anchorage zones were analyzed. The research results show that in the whole process of longitudinal prestressing tension, the box girder anchorage zones are in an elastic state, and stresses in concrete in testing sections have a linear relationship with applied load to indicate that the bridge structure is in an elastic state.