Limited Segment Of The Thin-walled Curved Box Girder Prestressed Effect Stiffness Method Analysis Of Temperature Stress Effect

In this paper.by establishing the govering differential equation for flexural torsional analysis of thin-walled curved box girders,solving the differential eqations derives the formulas of deformation.And based on the stiffness method theory ,the stiffness matrix is developed .The node of element has ten degrees of freedom.So the analysis for curved,warping torsion,distortion,and shear lag effect of curved box girder can use the conventional structural member systems.To calculate the prestressing force effect,the prestressed tendons in curved box girder are converted to equivalent loads,and analysis of thin-walled curved box girder can be done by conventional structural member systems.By calculating the equivalent temperature load of every curved element ,it can be considered as the load of the structure, so the effect of the temperature of thin-walled box girder can be calculated by convention method.In order to verify the accuracy of the method .three examples have be calculated by the proposed method and Ansys program.The results are in agreement with each other.