Simulation Study On Seismic Behavior Of Reinforced Concrete Joints Bonded With Steel

The nodal component is the key part of all frame structures,so the nodal is the weakest part in the frame structure.At present,for the research of reinforced concrete structure reinforcement has a lot of,at the same time also to have certain achievements on the study of member nodes,but all the research of the node does not consider the existence of the floor,to make the results more close to the actual situation,so this article USES the finite element software ABAQUS glued steel reinforcement of reinforced concrete frame finite element analysis simulation studies and considering the existence of the floor.The node model established in this paper is based on the node reinforcement atlas.Considering the insufficient reinforcement of the node,the node is strengthened with steel.The cross-sectional dimension of the column is 400mm400 mm,the height is 2000 mm,the length is 2400 mm,the cross-sectional area of the secondary beam is 200mm500 mm,the length is 1750 mm,and the thickness of the floor is 100 mm.A total of 13 node models were established,one of which was the node model without steel bonding reinforcement,and the others were divided into four groups for simulation research.The variables controlled during simulation were: different thickness of adhesive steel,different width of adhesive steel,different thickness of structural adhesive and different axial compression ratio.All of them are under the action of repeated mid-vertical loads.The following conclusions can be drawn from the analysis of the simulation results :(1)the steel plates with thickness of 3,5 and 7mm were strengthened,respectively.It was found that the seismic performance of steel plates with thickness of 3-5mm was improved,but the corresponding seismic effect was changed between5-7mm,but the reduction effect was not obvious.(2)steel plate widnesses of 50,100 and150 mm were used to reinforce the members.It was found that the seismic performance was reduced when the width was 50-100 mm,but the corresponding seismic effect was significantly improved when the width was 100-150 mm.(3)the structural adhesive thicknesses of 1.0,1.3 and 1.6mm were used to reinforce the members.It was found that when the seismic performance of the structural adhesive thickness was reduced between 1.0and 1.3,the corresponding seismic effect was increased between 1.3 and 1.6,but the improvement effect was not obvious.(4)the axial pressure ratio of the control components is0.3,0.5 and 0.7,respectively.It is found that the seismic performance decreases at 0.3-0.5 and increases at 0.5-0.7,but neither increase nor decrease is obvious.