Zijin Cable-stayed Bridge Anchorage To The Local Stress Analysis And Experimental Study

Cable-stayed bridge is composed of tower, cable and beam, prestressed concrete box-shaped section is often used in cable-stayed bridge. The stress distribution of anchorage zones is so complicated that if designed improperly, it will easily lead to cracking, even endanger the security of the whole bridge. As a result, the stress analysis and experimental study of anchorage zones is extremely essential in the design of cable-stayed bridge.In the paper, based on the plane and spatial finite element theory and the analysis software named ANSYS, the design program of anchorage zones of Zijin Bridge is analyzed precisely and also a full-scale test research is done to this anchorage zones.Plane and spatial finite element is used to analyze the stress of anchorage zones;APDL is used to control the establishment and the computation of the space analysis model;Pole element is used to simulate the prestressed steel tendon and temperature reduction method is used to simulate the excerting of the prestress;A full-scale model test is used and also is compared with theory;The analysis and the test indicated that the stress distribution of anchorage zones is extremely complex, the simplified computation can't respond the real distribution and size of the stress, and structures of the anchorage zones of Zijin Bridge and the allocation of the prestress are reasonable that can meet the concrete demands on stretch resistance and press resistance.