Research On Cracking Performance Of Concrete Floor On Beam End With Hinge Connection

Sub beam tend to design multi-span simply supported beam in composite frame structure. Because simply supported beam is theoretically only bending positive moment. Concrete plate can provide compression strength to advantage with high bearing capacity and stiffness. But in fact any hinge connection to connect the rotation has certain constraint, which can transfer some moments. Taking into account that the effect of floor will reduce steel ductility and rotation capacity in a certain extent, composite beam design with simply supported beam will produce negative moment. Concrete plate is in the negative moment area of tension. The formation and development of cracks if not be effectively controlled will affect the normal use of composite beam, we have to adopt some measures to ensure that the composite beams can meet the normal requirements.Based on the numerical analysis of model for composite beams, the development law of cracks is obtained.The validity of the analytical solution is verified by comparing it with the experimental data collected from the literature. To deeply research work for mechanical performance of beam end with hinge connection, the cracking performance of concrete floor and control method. The relative importance of various influencing factors is determined by further numerical analysis, thus providing reference for anti-crack design of floor with composite beam frame structure.