Research About The Design Of Inclined Column-shaped Transfer Floor Of Framed Short-leg Shearwall Structures

The research about the frame supported short-leg shear wall focuses on the wholecomputational model, there are few research institutions for experiment and nonlinearfinite element analysis on this topic. Based on the foundation of oues team’s research,this article focuses on the inclined-shape column transfer floor of short-leg shear wallstructure, summarize the joint experiment under vertical load and the cycle repeatedsubstructure experiment, then do nonlinear finite element analysis on W5-1and W5-3under vertical load and W11-2and W11-3under the cycle repeated substructureexperiment, using the concrete damaged plasticity model and PQ-Fiber2.0-Usteel-02model of reinforcing bars inABAQUS software. The comparison between the results ofthe analysis and experiment proves the analysis theory which we use is feasible.Basing on the reinforcement of W5-1, we research the influence about thecomponents by changing the section of transfer beam, the section of inclined columnand the angle of inclined column; Based on the reinforcement of W11-3, we researchthe influence about the components by changing the axial compression ratio, the sectionof transfer beam, the angle of inclined column and the section of inclined column.Summarizing the experiment and nonlinear finite element analysis, we get theconclusion that inclined column transfer structure can use truss calculation model, andwe deduce formula about the distribution of vertical stress and the value of theparameters. We also prove that inclined column transfer structure can protectbeam-column joint, so it has enough energy dissipation capacity. In order to achievereasonable seismic performance, this article suggest that the axial compression ratio ofshort-leg shearwall should be controlled in0.1~0.5, the axial compression ratio ofshort-leg shearwall of some shearwall supported by the transfer beam should use lowerlimit than the others in the same floor. Some short-leg shearwall supported byspan-depth ratio of transfer beam(No beam-support wall) should be controlled in4.5~6.5, for some some short-leg shearwall supported by controlled in6~8. The inclinedcolumn should support at the end of each shear wall and break up the transfer beamuniformly, and the angle range suggested is50°~65°. The stiffness of inclined columnis decided by the analysis of inclined column, the axial compression ratio of theinclined column and storey stiffness of the structure. When the short-leg shear wallthickness ratio is between6and7, it can get better seismic behavior. We also should strengthen the reinforcement of some short-leg shearwall supported by frame-supportedbeam and the slab above the transfer floor.