Continuous Curved Girder Bridge Bearings Pre-eccentric Setting Research

The torsion distribution of the continuous curved girder bridge can be changed by adjusting bearing eccentricity. The bearing eccentricity was important to the mechanical character of curved girder bridge. In virtue of the basic mechanical character, the suitable bearing eccentricity method in single- point-supported continuous curved girder bridge was studied.First of all, the basic character and searching actuality and still existed problem were discussed and the necessity of searching this problem was demonstrated. The normal modeling method of the curved girder bridge was debated. Through comparing and analyzing, the problem paid attention in modeling has been brought and the stiffness matrix of the curved beam finite element method was analysis in detail. The principle and application condition and the normal method of bearing eccentricity were talked about. The modeling and the element stiffness matrix of curved girder bridge with eccentricity bearing were analysis. Besides, the influence of bearing eccentricity was debated.The suitable bearing eccentricity method of influence matrix minimum torsion strain energy was presented for the first time, and the expression of the value of bearing eccentricity was educed. In virtue of the application development and optimum technology of ANSYS, the corresponding program has been developed. This method was validated by the actual bridge. Through computing and analyzing, it has been proved that the method is valid and applied and convenience.