Research on Application of Externally Prestressing for Simple-Continuous Bridge

The joint style of the connecting section is one of the key problems of the simple-continuous system. The cost of bridge structure, the difficult degree of construction, and the performance of application are all determined by its joint style. In this paper, a new joint style, that is, applying externally pre-stressing for the connecting section, has been proposed based on the theories of externally pre-stressing systems and post-continuous technologies at home and abroad. Firstly, by using the finite element analysis software "ANSYS", the nonlinear full-stage simulations on test beams are carried out. The cracking behavior, deflection variation, bending moment redistribution of test beams, and the ultimate loading capacity of continuous beams are investigated emphatically. Secondly, the result of numerical analysis have been verified by corresponding indoor experiments. Finally, some suggestions on structure design are put forward.