Parameter Sensitivity Analysis And Cable Damage Reasarch Of Extradosed Cable-stayed Bridge

The extradosed cable-stayed bridge is a new type of bridge with the characteristics ofcontinuous girder bridge and cable-stayed bridge. It develops rapidly because of its uniquestructural characteristics, convenient construction and beautiful appearance. In this paper,the author takes an example which based on an extradosed cable-stayed bridge, the studyfocuses on parameter sensitivity analysis and cable damage effect to the bridge structuralperformances. The main contents include the followings:1.The finite element model of one bridge is set up according to the real constructionstages of it. It verifies the rationality and obtain the forces of the maximum cantileverconstruction state and finished bridge state. Then select density,elastic modulus and otherparameters to determine which may remarkably affect the bridge behaviors when parameterschanges. The study provides a reference for the construction of similar bridges and themonitor of Dongbao River Bridge.2.The reasons of cable damage occurred commonly are analyzed. Based on the bridgefinite element model, the simulation of different cable location is made to study the staticcharacteristics such as girder alignment, girder stresses, cable stress. Dynamic characteristicsis studied either. The above studies provides theoretical reference of cable replacement.3.Accoding to above research, a health monitoring scheme is put forward combined withdefection and empirical analysis.At the end of this paper, the author makes a brief summary of research work, gives someresearch conclusion and points out some problems which need to be studied in the future.