Research On Seismic Behaviors Of The Rigid Joints Of Steel Beam And Concrete Wall

The steel beam-concrete shear wall is the key part of the force in the mixed structure.At present,the research on the seismic performance of the steel beam-concrete shear wall connected to the rigid joint is not enough.In this paper,The seismic behavior of steel girder-concrete shear wall is studied,and its deformation and mechanical properties under monotonic load and cyclic reciprocating load are analyzed.The following work is carried out:1.In this paper,ABAQUS finite element software is used to establish the in-plane and out-of-plane nodal models,in which the steel and concrete are selected for solid elements and the steel is made of two-dimensional linear elements.The steel is modeled by elastic-plastic three-fold line.The concrete adopts the plastic damage model,the load loading system is controlled by the displacement loading,and the monotonic load and the low cycle cyclic reciprocating load are applied respectively.It provides an effective means for obtaining the nonlinear force process of the joint.2.By comparing the shear wall thickness of the steel beam-concrete shear wall at the plane,the axial compression ratio of the shear wall and the concrete strength grade of the shear wall,according to the finite element simulation results,the load-displacement curve,the node hysteresis curve,The stiffness curve,the skeleton curve,the ductility coefficient of the calculation joint,the equivalent viscosity coefficient and the energy dissipation coefficient.The stress characteristics and the seismic behavior of the out-of-plane rigid joints are analyzed and summarized.3.By changing the parameters of the steel beam-concrete shear wall nodes in the plane(shear wall thickness,shear wall axial compression ratio and shear wall concrete strength grade),the results are compared with the finite element simulation.By comparing and analyzing the parameters,The Influence of Seismic Behavior of Rigid JointsThe results show that the stiffeners of steel beam-concrete shear walls have higher bearing capacity under monotonic load,and there is stress concentration at joint bolts under low cyclic cyclic loading.In the plane,the hysteresis curve of the rigid joint in the plane is full and the seismic performance is better.The equivalent viscous coefficient of the rigid joint is 0.2-0.24,and the equivalent viscous coefficient of the rigid joint in the plane is 0.18-0.23,which indicates that the rigid joint in the plane has good energy dissipation capability.In the plane specimen and the out-of-plane specimen simulation,the strength grade of the concrete is increased or the axial compression ratio of the concrete shear wall is increased or the thickness of the shear wall is increased,and the equivalent viscosity coefficient of the specimen is reduced in different degree.