Research On Seismic Behavior Of Beam-Column Exterior Joints Installed Whit The Lead Plate On Beam-End

The flexible and rigid connection is one of the reinforced concrete frame structure which is widely used in modern buildings.It has the characteristics of node stress concentration,flexible pace,light weight and so on.When the structure is adopted,the structure integrity and rigidity are strong,so it can effectively play the role of earthquake resistance.But the structure beam-column joints are often the most easily damaged parts in the earthquake.Under the action of strong load,the beam-end enters the elastic plastic stage to produce the plastic hinge,which causes the structure to fail.The node once the damage will cause serious impact on the building,thereby losing the use of function or even collapse,so the seismic performance of beam column joints is particularly important.Lead has good plastic deformation energy dissipation effect and anti-shearing ability.At present,there are many made of lead of seismic energy dissipation device.In the frame structure can be the stereotype as energy dissipation devices in beam end plastic hinge zone.In this paper,based on the existing norms,the author calculated reinforcement of the standard layer edge nodes of the three layer frame structure.According to the reinforcement,produced two groups reinforced concrete frame side joint specimens respectively,and in the beam-end arranged the lead which have different thickness,then applied low cyclic loading.From the beam-end shear and deformation capacity,structural stiffness,energy dissipation capacity analysis in the effects of stereotype of the arrangement at the ends of a beam on the seismic performance of the edge node.At the same time,the finite element analysis software ABAQUS,simulate and analyze the common structure and layout of different thickness of grids structures,grids for research on the frame beam column joints seismic performance.