Research On Flexural Behavior Of Steel Reinforced Concrete Composite Beams

Steel reinforced concrete structures have large stiffness, high loading capacity and superior seismic performance. These advantages make steel reinforced concrete structures become the preferred form of construction in high-rise buildings, overload structures, large span and high-rise structures in high intensity seismic area. Over the years, with the rapid development of prefabricated buildings, the use of reinforced concrete components in construction is increasing. While the researches on composite components are limited at present and there are no uniformed design theories of composite components, in this paper we study the normal section flexural bearing capacity and ductility of composite components.Based on the self-programming, this paper mainly calculates the normal section flexural bearing capacity of composite components using plane finite element method, limit equilibrium method and the method of superposition, compares the results and investigates the accuracy, the advantages and disadvantages of the three methods. This paper also studied the steel ratio, steel flange size, position of steel reinforced bone and other factors that affect the bearing capacity of the composite section.Next this article studies the ductility of steel reinforced concrete composite beam section using plane finite element method. This paper calculates the moment and curvature of steel reinforced concrete composite beam section by programming, finds the principal influence factors with corresponding laws of section ductility and draws the curve of M-θ using MATLAB. Then we get the coefficients of curvature ductility of the composite beam section in different conditions. The results show that the reinforcement ratio and configuration modes of longitudinal reinforcements, steel ratio and configuration modes of steel skeleton, the flange width and other factors have a great impact on the ductility of steel reinforced concrete composite beams.