Study Of Mechanical Behavior On Curved Steel And Concrete Continuous Composite Beam

Curved steel and concrete composite beam is a new type of composite beam connected steel beam and concrete slab by shear connector.The steel and concrete composite beam can play very well on the compression strength of concrete and tensile properties of steel.Curved beams can not only adapt to different terrain but also enable people enjoying the beauty.Compared with the simply supported beam,the continuous beam has less material and smaller weight.Because of its complexity,resulting in both the actual engineering and theoretical research has many problems to be solved.This paper introduces the formula of the internal force and deformation of curved steel and concrete continuous composite beams from theoretical study,to provide convenience for the acture project.Using the theory of elasticity,based on the internal force balance and deformation coordination of concrete slab and steel beam,established the formula of internal force and deformation of simply with fixed curved composite beam under vertical uniform laod,uniform torque,concentrated loads and concentrated torque.Using the method of structural mechanics,deduced the formula of the internal force and deformation of two-span、three-span curved steel and concrete continuous composite beams.The results show that,The shear on concrete and steel increases with the increase of the load and radius.The shear on the concrete slab increases with the increase of the height of the concrete beam,decreases with the increase of the height of the steel beam.The shear on the steel beam increases with the increase of the height of the steel beam,decrease with the increase of the height of the concrete beam.The radius and the loads show more influence on the shear,the height of concrete beam and steel beam show less influence on the shear.As the structural characteristics of curved steel and concrete composite beams,using the ABAQUS finite element simulation software,established two-span steel and concrete continuous composite beams model.Calculate the section stress distribution curve under concentrated load.Finally,analyses the affect of radius、load、the height of concrete slab and steel beam.The results show that,under the concentrated load,the vertical stress maximum occurs in the seat of the curved continuous composite beam.The radius and load shows larger influence on the stress,The height of concrete slab and steel beam shows smaller influence on the stress.