The Seismic Behavior And Nonlinear Finite Element Analysis Of Steel Reinforced High Strength Concrete

Recently, more and more high-rise buildings have adopted a steel reinforced high strength concrete structure. This structure can form a better play to steel, concrete performance. Frame joint is the key part connecting beams with columns. The internal forces of beams and columns transfer through joints. The mechanical behaviors of steel reinforced high strength concrete frame joints are very complex. Generally, a lot of experiments, in which labor and finance are necessary to establish the influence factors on the behavior of joints, must be carried out.However, these problems can be solved easily by means of finite elements method for simulating the performance of the joint.In this paper, based the experiments of the seismic behavior of SRHC beam-column joints, in the MSC.MARC software environment, nonlinear finite element analysis is presented on the behavior of weak-joints.In this paper,combinned-finite element model is adopted.Bond-slip behavior is not taken into account between all components on the core of the SRHC joints. A good correlation between the finite element model and the experimental results was obtained .It showed the models are accurate. In addition, the conclusion is drawn that bond-slip behavior has little influence on the capacity of joints, but it has an important influence on the ductility of joints, specially for coral joints.An analysis is developed for influence factors that have some influence on joints' behavior. The results show that axial ratio has a good and visible effect on the capacity of joints; that the higher concrete strength is, the higher the capacity of joints is; the ratio of reinforcements and the thickness steel web of column have large influence on the ductility SRHC joints, not but the capacity of SRHC joints.