Mechanical Performance Analysis Of H Section Steel-concrete Composite Beams With Stud Connectors

Steel-concrete composite beam is the constructional element,and it combines the steel beam with the concrete plate into the entirety which is able to understand forces by utilizing the shear connectors.The shear connector connects the steel beam with the concrete plate,which makes them work together and enhances the stress perfo rmance of the shear connector.This combination could utilize the compression of the concrete and the tensile of steel beam to the large extent.This essay analyzes the stress performance of steel-concrete composite beam of I-shaped which used the stud as the connection,and emphasizes the influences from the connection to the composite beam.The main job contents are written below.Firstly,this essay established the deflection differential equation of stud being stress and draws the shear stiffness calculation formula of stud,which is based on the interaction mechanism between the stud and concrete.Furthermore,this essay also draws the conclusion of the load-slip curve equation and verifies the rationality of this equation by calculating.Secondly,this essay establishes the three dimensional nonlinear numerical analysis model of steel-concrete composite beams of I-shaped with stud connectors,which is based on the previous experimental research.Also this essay verifies the whole action process of the composite beam under the concentrated load,analyzes the changing condition of the stress,the strain and the interface deflection of the mid-span section,as well as the overall deflection of the composite beam.Finally,it draw the conclusion of the load-slip curve of the composite beam’s mid-span section under the concentrated load,whose results matches well with the experimental data.At last,this essay discusses the influence from the connectors parameters,i ncluding the stud diameter,the stud height,the horizontal stud row number and the longitudinal spacing to the overall mechanical properties of steel-concrete composite beams of I-shaped,which provides the reference to the engineering design.