Analysis On The Mechanical Behavior Of Steel Frame Beam And Concrete Core Shear Wall Joints

High rise and super high-rise buildings are developing rapidly in China.Among them,the composite structures of steel frames and concrete core tubes are used in high-rise buildings.This structure can play the advantages of high bearing capacity of the shear wall structure of the lateral stiffness and strength of steel structure,but to make two different stiffness system coordination,joint force,the key lies in the effective transfer displacement between the steel frame and concrete core tube coordination and force.The beam wall joint is the key component of the connection of the beam and wall.It is very important to study and understand the mechanical behavior and failure mechanism of the beam wall joint,so that the design of the joint is accurate,the calculation is reliable and the structure is reasonable.Although the composite structure beam wall joints have been widely used,but the nodes form a single,test and research lags behind engineering practice,this paper proposes a novel composite structure of steel beam and concrete shear wall nodes based on previous node test and research,the establishment of beam wall joint model using ANSYS finite element software,simulation and analysis the rigid joint and hinged joint shear stress performance under bending,considering the influence of horizontal load performa nce and structural parameters on the stress of beam wall joints,and provide reference for the practical engineering design.The main work of this paper is as follows:Firstly,the structural parameters of the composite beam and wall joint are designed,and the finite element model of the composite beam wall is established.Based on the beam wall joints in finite element simulation considering the pre buried steel and concrete bond slip,considering the contact problem of connection plate and bolts,steel web,this paper mainly studies the stress of steel and reinforced concrete shear wal s with overall modeling.Two,using ANSYS finite element software to simulate the rigid joints and hinge joints of two models under the action of shear stress in bending,o n two different groups of bearing capacity and stiffness of joints in each component stress condition,through the hysteretic curve under cyclic load ductility and seismic performance,the nodes of bending shear under the action of force performance,and analyzes the influence of joint stiffness on the node stress performance comparison.Three.The effect of horizontal load on the mechanical behavior of joints is simulated by applying low cycle cyclic loading at the end of the joint beam.20 beam to wall jo int models with 4 different structural parameters are established,and the influence of joint structural parameters on the mechanical behavior of the beam wall joint under bending and shear is analyzed and compared.The embedded parts must exceed the ancho rage depth of shear wall line,strengthen the weld quality can significantly improve the bearing capacity,increase the thickness of the joining node can improve the ultimate load.Conclusion.Finally,the research contents and conclusions are summarized,and the constructive measures are proposed,and further research directions are expected.