The Study Of Shear Conecting Behavior In Anchorage Zone Of Pylon Of Jintang Bridge

Anchorage zone of pylon, which is a key part of cable-stayed bridge, can pass local concentrated cable force to the tower column safely and uniformly. The anchoring steel beam-steel corbel combined structure of force transmission, combining the two anchorage forms of steel anchor box and traditional anchor-hold steel beam, was uesd creatively in the anchorage zone of pylon of Jintang Bridge. The new anchorage form passed the vertical component of cable force by shear connectors, and beared the huge horizontal component by its anchoring steel beam. Whether the connection between steel plate and concrete pylon wall was reliable related to the safety of the whole anchorage zone of pylon. It's hard to determine the stress characteristics and reliability of this connection in the new anchorage form, depending on theoretical analysis only. Therefore, the model test and study on interface between steel and concret of anchorage zone of pylon seemed particularly important.The type of shear connectors selection test and full-scale model test for the anchorage zone segment of Jintang Bridge, which is under-construction, were the project background. First of all, two types of shear connectors were selected to be the alternative schemes, and were analyed emphatically,based on the investigation of all types of shear connectors. Following, the whole stressing processes of the two types of connectors were analyed to reveal their mechanical behaviors and failure mechanisms, based on the results of type selected test. Through corresponding finite element analysis, better simulation calculation method was summarized comparing with the test result analysis. Final, the machanical behavior, emergency capacity and reliability of the two types of connectors were verifyed in the full-scale model test, and the optimum scheme was selected.