Experimental And Theoretical Study On Composite Behavior Of New Steel-concrete Composite Beams

In this paper, in order to grasp the new combination of steel and concrete composite beams, through the contrast experiment and the numerical simulation of finite element, We conducted the following research:According to the experiment phenomenon, we know the damage form of a new type of composite beams and as the shear connectors of ribbed concrete beam how to stress deformation. Change the thickness of plate and distance of shear connectors, we know that the influence of their degree change of composite beams combination. The strain distribution along the height of section, load-displacement curve, slip and vertical uplift are important data which is the key to used to determine whether steel and concrete work together. In this paper, we test and analysis of these data, and conclude the combination rule in the whole process.The current computation theory of composite structure are introduced, according to this theory, we calculated the deflection and stress of the new type of composite beams. Comparing the calculated results and experimental results, we found that under normal use limit state, the combination of the new type of composite beams is very good.Established the finite element model that use the contact analysis method to simulate the interface of steel beam and concrete. Under normal use limit state, we analysed the stress and strain, and slip, vertical uplift on each new type of composite beams and compared with the experiment data, verified that if the thickness of plate and distance of shear connectors changed, the combination is also changed.