The Mechanical Analysis On Curved Grider Bridge Of Prestressed Concrete

Prestressed curved girder bridge is a important structure type in modern traffic engineering. With the development of economical level and situation of the opening in our country, a large lumber of curved girder bridge have been taken for its favourable linearis and good adjustability in any kinds of ground. In this paper, The main research contents are as follows: (1)In order to analyze the influence which is caused by the difference about the centre of figure and the shear centre in prestressed curved girder bridge. The whole equivalent loads formula is deduced by used mechanics principle and differential geometrical formulal, In the course of deduction, the loss of friction is considered. (2)Based on energy principle, the flexibility coefficient of curved girder bridge is getted and the stiffness matrix is educed by mathematical methods. Under the integrated development environment of Fortran Powerstation 4.0, this paper has written the above contents into common computing programs by using displacement method. (3)With the help of macro file compiled in APDL under FEM software ANSYS, two example of bridge is analysed and the result is compared with the data obtained by the program analysis. The results have proved the validity of the theory and the arithmetic and the enough precision of the given programs. (4)A series of factor such as the difference about the centre of figure and the shear centre, curvature radius, central angle is discussed. Some valuable results is getted in the project.