Study Of Mechanical Behavior On Cured U-Steel And Concrete Simply Supported Composite Beam

Cured U-steel and concrete composite beam is a new structure which based on U-steel and concrete composite beam and cured beam. The U-steel and concrete composite beam can play very well the compressive strength of concrete and tensile properties of steel. And it can also improve the stability and sexual energy of the structure effectively. Cured beams can not only adapt to different terrain but also enable people to enjoy the beauty by the crisp and smooth lines. The combination of two structures is an effective method to play to their respective advantages. However, now there are no related specifications in our country about the cured steel and concrete composite structure. Since the particularity of cured steel and concrete composite structure, there are also many technical problems to be further studied. This paper introduces a part of theoretical study of cured U-steel and concrete simply supported composite beams.This paper established the force calculation formula of concrete slab and U-steel in the cured composite beam at different working conditions such as vertical uniform load, uniform torque, concentrated torque and symmetrical concentrated loads.Using the theory of elasticity, this paper established the interface slip calculation formula between the U-steel and concrete slab at different working conditions. The results show that: the value of slip increases with the increase of the load, decreases with the increase of the radius and connection stiffness, strength grade of concrete has little affect about the slip and the slip decreases with the increase of the height and width of concrete slab.Using the theory of elasticity, this paper also established the axial force calculation formula of the U-steel and concrete slab at different working conditions. The results show that: the value of axial force increases with the increase of the load, decreases with the increase of the radius and connection stiffness, and when the radius reaches a certain extent, the axial force almost has no change, strength grade of concrete has little affect about the axial force and the axial force decreases with the increase of the height and width of concrete slab.At last, the paper established the deformation formula of the cured U-steel and concrete simply supported composite beam using the theory of elasticity.