Study On Temperature Stress And Deformation Of Super Large Steel Structure System

With the rapid development of industrialization, large and super large steel structures continue to emerge. Steel plants generally require little or no set expansion joints in order to meet the demands. The plants are longer than the code for design of steel structures rules. In this case, how to control the thermal stress of the large-scale structures is the first problem to be solved in the design.Numerical model is established through the application of finite element analysis software ANSYS. A model is calculated without taking the temperature stress relief measures and with setting the growing circle bore. Various components temperature stress and longitudinal displacements are obtained.When the plant model does not take the temperature stress release measures, the ratio of the temperature stress and bearing capacity of components is very large. The structure is so severely weakened carrying capacity of structure that measures should be taken to release the thermal stress.When the plant model sets up the growing circle bore, the length of the growing circle bore is preliminarily determined by calculating. The overall stability of the plant is maintained to a great extent by possibly reducing the length of the growing circle bore. The maximum stress appears in the column foot of columns, so the stiffness of column foots should be enhanced. Longitudinal displacements of components appear in the middle of beams. The displacement value is much smaller than that without taking the temperature stress relief measures, but the value is just a little larger than that with setting expansion joints.The data indicate that the growing circle bore can appropriately replace expansion joints, and show many advantages.