Experimental Research On Steel C-Section Reinforced Concrete Composite Beams

Steel-concrete composite structure combines the advantages of steel structure and concrete structure such as high capacity,high stiffness,good dynamic performance and seismic performance.It is widely applied in many engineering field.Meanwhile,the theoretical and experimental study of steel-concrete composite structure become mature gradually.Steel-concrete composite beam is an important component bears lateral load,which gives full play to the tensile strength of steel and the compressive strength of concrete.This paper proposes a new form of composite beam structure,and carries on systemic experimental research and theoretical analysis to the composite beam.The main study in this paper includes the following aspects:1.To research the bending mechanical properties of steel c-section reinforced concrete composite beams,this paper designs five simple supported beam specimens with different aspect radio and different batten plate spacing,and carry on the monotonic load bending test on them under mid-span symmetric load.This test records the destruction process of the specimen,measures some important data,such as the vertical loads?deflection and strain,etc.It also analyzes the change of strain along the section height and the failure mode of the specimen.Investigate the force performance of composite beam by the experimental data.2.On the basis of experiments,theoretical analysis of stiffness and deformation is conducted,composite beam stiffness and deformation calculation formula is got.Calculate the deflection of each component and compare it to actual deflection for analysis.3.This paper presents flexural capacity calculation formula of steel c-section reinforced concrete composite beams,and the bending moment based on formula fits the experimental value very well,which can provides the basis and reference for application of the composite beam elements in practical engineering.