Effect of Temperature Stress on Concrete Filled Steel Tubular Arch Bridge
With the development of concrete filled steel tubular arch bridge to the direction of thin wall and large span, the problem of temperature stress has been paid more and more attention by the scholars. In this paper, a threedimensional finite element numerical model is established and used to analyze the concrete filled steel tubular arch bridge called Youyi Bridge based on the finite element method theory. The internal force and deformation of the structure are studied under temperature load. In order to simplify the calculation, the model is only considered the role of stable temperature, and neglected changes in temperature gradient, convection, radiation and other factors. The internal force and full bridge deformation of the main arch, beam and other control sections are calculated and compared under different temperature load. From the calculation, it can be seen that the temperature stress in the bridge is very obvious, and sometimes even greater than the stress caused by other external loads. The results provide the basis for the design of concrete filled steel tubular arch bridge in the actual project.