Finite Element Analysis Joint With Cover Plate Reinforced Ring Of Round Steel Pipe Column To H Shaped Steel Beam

In recent years,with the continuous strengthening of our national strength,steel structure slowly into people's attention.Throughout the development history of steel structure,compared with the development level of western developed countries,China's steel structure accounted for 5% of all buildings,while the western developed countries more than 50%.And steel as the main material of steel structure,compared with other building structures,has many advantages.Therefore,steel structure in China is a sunrise industry,has a very good development potentialThe beam and column joints in the frame structure are the key parts of the steel structure construction,and the beam and the column are combined into a whole,effectively carrying the external load.However,because of the complexity of the connection between the beam and the column,the internal force distribution is often uneven,the stress concentration and other phenomena,the seismic performance of the building will be the stability of the building,safety and so on,so the node is building Material design and construction of the key and difficult,by the domestic and foreign scholars generally attention.Based on the existing research on the new type of stiffened ring beam-column connection nodes,the new finite element analysis software ABAQUS is used to model the new nodes and verify that the modeling method is feasible and reliable The results show that the ratio of ring to aspect ratio,ring length to thickness ratio,column diameter ratio,column diameter ratio,beam width ratio,beam width ratio,beam height ratio.In this paper,a large number of finite element parameters are analyzed for the new type of stiffened ring round steel tubular column and H type steel beam joints.The main conclusions are as follows:Firstly,the axial compression ratio has a significant effect on the failure mode of the nodes.When the axial pressure ratio is not less than 0.3,the specimen has similar mechanical properties,the joints are in the beam end plastic hinge damage;when the axial pressure ratio is greater than 0.4,the column to the side of the bend and the bearing capacity decreased significantly,the node core area The occurrence of column crush damage.Secondly,the ratio of column diameter to thickness,the ratio of ring length to thickness,the ratio of beam width to width,the ratio of beam and width to the bearing capacity of the beam are greatly affected,and the bearing capacity of the joint is larger than that of the beam The increase in the ratio increases with the increase of the ring length ratio.The thickness ratio of the joint has the greatest effect on the cut line stiffness of the joint.The enhancement of the ring length and thickness ratio has a great influence on the energy dissipation capacity of the nodes.With the increase of the ring thickness ratio,the energy consumption of the nodes increases obviously.The beam width ratio of the column beam has a great influence on the ductility of the joint.With the decrease of the beam width and width ratio,the ductility coefficient of the joint increases.Thirdly,in the design of such a new type of plate-type reinforced ring round steel pipe column-H steel beam joints,the need to meet the axial pressure ratio n does not exceed 0.3;round steel pipe diameter ratio should be less than 23.5,The thickness ratio of the beam should be greater than 1.8,the beam width ratio should be greater than 18,and the thickness ratio of the beam web to be greater than 35.7,to ensure that the node has sufficient strength and stiffness,So that the joints of the beam end of plastic hinge damage rather than the core of the core area of the crush damage.