Study For Segment Model Test Of Suifen River Cable-stayed Bridge

The anchorage zone of cable bridge tower is the key part of cable-stayed bridge, in which stress distribution is rather complicated. The anchorage zone of the pylon is a key part for cable-stayed bridges, where the local concentrated force of cable will be transferred to the pylon safely and uniformly. Because of the powerful local concentrated forces, anchoring forces from prestressed steels and weaken factors from opening holes, the strength state at this area is very complicated. Therefore, analysis of strength performance at the anchorage zone of cable-stayed bridge tower has been attracted attention in bridge engineering all the time and anchorage zone of tower is also the difficult and important part in designing and constructing of cable-stayed bridge. Based on Suifen River Cable-Stayed Bridge, the clear numerical analysis and reliable full-scale model test for the anchorage zone segment on the tower were carried out.At first, used ANSYS to analyze the anchorage zone on the cable bent tower and investigate stress distribution and deformation at the area. The analysis results by FEA indicated that the horizontal direction stress compared with the vertical direction stress was important. During the prestressing stage, prestressed steels converged at the anchorage zone where the stress distributed complicatedly. Especially influenced by horizontal prestressing force of great tonnage tension, great local tension stress would appear at a small area from the tip in the long inboard of the model. It had been proved by theories and experiments.Full-scale model test of the anchorage zone segment on the cable bent tower was done. The anchorage zone is a key part of cable-stayed bridges, where the horizontal forces are enormous. At the same time, there are other kinds of forces and the weakening effects by holes. So the strength state is very complicated, the strength state was so more complicated that simple theory could not analyze the real stress distribution and deformation at the anchorage zone. Compared results of the model test of the full-scale with that of FEA: during the pretension stage and before concrete fracture, the stress got by test corresponded with the results got by FEA.