Experimental Study On Mechanical Behavior Of New Steel-Concrete Composite Beams

Steel-concrete composite beam is a concrete and steel beam flange shear connectors through a combination of the overall force of the beam, also referred to as composite beams. Steel-concrete composite beam with high capacity, good ductility, stiffness, member cross-section the advantages of small size. Combined Beam in the role of the main advantage for combination, the combined effect of size is determined by the shear connectors. The current structure of the portfolio focused on increasing the performance of shear connectors understanding through the effective use of the material to develop a more economical design.This paper proposes a new type of perforated plate connector beam, on three different shear span ratio of the new steel-concrete composite beam shear properties of experimental research, with an ordinary stud beams were compared. Through four steel-concrete composite beams and damage patterns of development, received its mid-span deflection curves, load-strain curves, and interface slip curve. Compared with the shear span ratio of ordinary steel-concrete composite beams and new steel-concrete composite beams carrying capacity and deformation capacity, and analyzes and summarizes the shear span ratio on the new steel-concrete composite bearing capacity and deformation of degree.Based on the research and study in this experiment, a new steel-concrete composite beam shear strength formula considering the effects of concrete flange is proposed, the results are in good agreement with the measured values. The article summarizes the new longitudinal beams slip properties of the influencing factors and mechanism of vertical shear a preliminary analysis. The use of reasonable assumptions and calculation model based on the new composite beam is derived bending capacity the calculated and experimental values are close. Finally, the existing beam stiffness analysis of calculation methods established for the new steel-concrete composite beam stiffness and deformation calculation.This paper will be helpful to the further research and theoretical analysis on mechanical behavior of the new steel-concrete composite beams.