Research Of The Connection Methods Between Frame Beam Column And Shear Wall Based On The Shear Test

To improve the precast rate of the frame-shear wall structure, connections between the precast specimens in the precast frame-shear wall structure were studied. In this paper. Connections between precast column-wall and precast beam-wall were studied mostly.First, in the view of the column-wall connection, this paper presented four kinds of precast column-wall connection structure scheme, like U-shaped steel connection, straight type connection, serial connection and straight U-shaped steel connection. Then design and construction of six S shape specimens:a cast-in-situ specimen, four precast specimens with keyway by different ways, and a precast specimen without keyway. Specimens for compressive shear test in order to study of column wall shear performance of the connection area. The specimens cracking, failure pattern, hysteresis characteristic, skeleton curves, the features of load, displacement and the steel strain situation has carried on the system researched under the effect of vertical cyclic loading. Results show that failure pattern of the cast-in-situ specimen and precast specimens with keyway are basically identical, the four kinds of connection modes are feasible. Deformation and fracture distribution of the serial connection and straight U-shaped steel connections are best, had the highest bearing capacity. Carrying capacity of the precast specimens without keyway was reduced greatly, and destruction is suddenly.Secondly, in the view of the beam-wall connection, this paper design and construction of three kinds of six specimens, such as double row straight reinforcement cast-in-situ specimens, replaced single row straight reinforcement cast-in-situ specimens and steel sleeve connection precast specimens, for the study of beam-wall socket sleeve connection performance in the precast frame-shear wall structure. The beam-wall connection area of the shear performance of compression-shear tests also considered the effect of junction surface compressive stress through pressure shear test. The specimens cracking, failure pattern, hysteresis characteristic, skeleton curves, the features of load, displacement and the steel strain situation has carried on the system researched under the effect of vertical cyclic loading. Results show that replaced single row straight reinforcement cast-in-situ specimens had better bearing capacity. Steel sleeve connection precast specimens are much poor. Set the axial compression ratio can make the shear capacity of the specimens improve greatly, and the deformation and fracture distribution of the specimens are relatively better.Then, use finite element analysis software WCOMD for the nonlinear finite element analysis. The simulation results were consistent to the experimental results, which verified the feasibility of WCOMD finite element analysis and reliability. And on this basis, various factors of the specimens were analyzed simply.Reference to previous references in china and abroad in the relevant shear strength calculation formula, analysis and extract the important factors related to this topic research. Fitting the precast beam and wall combined with the simplified calculation formula of shear strength. Verify its feasibility according to the experiment data.Finally, reach the conclusion. For the column-wall connection, four kinds of assembly connection methods are all feasible.