Theory And Simulation Analysis Of Creep Deformation In High Performance Concrete Bridges

Due to the creep characteristics of concrete, the deformation of concretestructure is continuously increasing under long-term load with the time. Withthe wide application of high performance concrete in the bridge, the creepdeformation problem of bridge is increasingly outstanding, and the analysis ofcreep deformation plays an important role in the bridge structure design andconstruction.In order to ensure the accuracy of calculation, we must select a rightcreep model. The existing creep models are put forward based on differenttheories, and they have different influencing factors and different applicationscopes. In this paper, these problems are discussed in detail. According to theshort-term experimental data, this paper propose a method of fitting creepcoefficient for the high performance concrete, and this method can remedy thedefects of existing creep models.Then, the paper derives the equation reflecting the relation among themid-span deflection and Curvature and the method of calculating prestressingequivalent load. On this basis, a program for calculating the mid-spandeflection is compiled according to the creep-transformed section propertiesmethod. At the same time, application of the program verifies the feasibilityand effectiveness of this method. In addition, this paper also uses this programto analyze the corresponding structure, and discusses the effect of commonreinforced bar in the creep calculation.At last, the paper introduced the function of ANSYS and the modeling ofprestressed concrete structures. In addition, on the basis of APDL languageand the creep rule the paper analyzes the mid-span deflection of test beams.And experimental value verifies correctness of this method. So ANSYS can beused as an effective tool to analyze the deformation of concrete structure inpractical project.