Research About The Reinforcement Ratio Of Frame-supported Short-leg Shear Wall Structures With Haunch Transfer Beam

Based on the team’s researches, the finite element analysis software ABAQUS is used to analyze the behavior of frame-supported short-leg shear wall sub-structures under low cyclic loading in nonlinear finite element method and analyze the influence of seismic performance of sub-structures by changing the reinforcement ratio of components.Firstly, ABAQUS is used to analyze the T-shaped transfer node of this kind of structure in static finite element method. By comparing the finite element analysis results with the experimental results, verify the reliability of ABAQUS’s simulation analysis. Then concluding the team’s research results of frame-supported short-leg shear wall structures with haunch transfer beam by experimental researches and theoretical analyses, generalize the standard model with perfect size of components and calculate the standard model’s reinforcement ratio by specification requirements refer to the results of elastic and static finite element analysis. By changing the reinforcement ratio of components, analyze the behavior of standard model under different axial compression ratio in nonlinear finite element method and the influence to seismic performance and failure mechanism.The analysis reveals the influence rule of the structure’s seismic performance by changing the reinforcement ratio and the appropriate reinforcement ratio which insure the better seismic performance of structures. The following conclusions can be drawn: 1) Frame-supported short-leg shear wall structures with haunch transfer beam contain good capacity of energy dissipation and ductility and reasonable damage mechanism by rational design. 2) In order to insure the better seismic performance of structures, the appropriate reinforcement ratio of column longitudinal bar, embedded column longitudinal bar, horizontal wall bar and transfer beam longitudinal bar(upper/lower) are 1.75%~2.5%, 1%~2.75%, 0.4%~0.8%, 0.8%/0.4%~1.2%/0.6% in the 0.1 axial compression ratio. 3) In order to insure the better seismic performance of structures, the appropriate reinforcement ratio of column longitudinal bar, embedded column longitudinal bar, horizontal wall bar and transfer beam longitudinal bar(upper/lower) are 2.5% ~ 4%, 1% ~ 2%, 0.6% ~ 1%, 0.8%/0.4% ~ 1.4%/0.7% in the 0.3 axial compression ratio. 4) In order to insure the better seismic performance of structures, the appropriate reinforcement ratio of column longitudinal bar, embedded column longitudinal bar, horizontal wall bar and transfer beam longitudinal bar(upper/lower) are 2.5%~4%, 1%~1.5%, 0.4%~0.8%, 1.2%/0.6%~1.4%/0.7% in the 0.5 axial compression ratio. 5)When it is designed by the specification, enlarge the minimum reinforcement ratio of transfer beam upper longitudinal bar, column longitudinal bar, embedded column longitudinal bar and horizontal wall bar.