Experimental Study On Seismic Behaviors Of Inclined Column-shaped Transfer Floor Of Framed Short-leg Shear Wall Structures With Varied Heights Of Transfer Beam

The frame-supported short-leg shear wall structure is a combination of short leg shear-wall and frame-supported shear wall. According to the specialty of short-leg shear wall, the frame-supported short-leg shear wall is quite different to normal frame-supported shear wall in structure forms and load-bearing characteristics. Although it has been used widely, the theoretic research of this structure needs to be perfected. This thesis carries out the pseudo static test, which are subjected to vertical loads and horizontal cyclic loads, respectively on three specimens of the framed short-leg shear wall inclined column-shaped transfer plane framework with the different beam heigts from 250mm,300mm,to 400mm. Then, observe and record the cracking load, yield load and the development of cracks, measure the structure distortion and strain of steel bars, describe amply the two specimens' whole devastation process and the strain of steel bars development regulation and finally sum up the two kinds of transfer structures' basic behavior characters.The experiment and results of analysis researched the stress mechanics, bearing capacity, damage shape, damage mechanism, hysteretic characteristics, distortion ability and ductility factor of the transfer structure under vertical load and horizontal load, and the seismic behavior of the haunched beam transfer frame-supported short-leg shearwall structure under vertical and horizontal load. Rational design suggestions and constructional requirements are proposed to the application of this structure in practical projects.At the same time, contrast and analyze the ductility, energy dissipation capability, and intensity & stiffness attenuation of the three specimens,also contrast the results with a specimens ot Beam-shaped Transfer Floor, according to the experiment data. Appraise the three models' seismic behavior and bring forward the aseismatic design ideas of the inclined column-shaped transfer structure.The study results indicate that the mechanical behaviors characters of the inclined column-shaped transfer structure are similar to that of a simple truss, including: (1)The load transfer is direct, specific, the transfer route is clear and the structure is simple. (2) It can reduce the beam dimension effectively, make full use of the story height, and is easy to satisfy the architecture function demands.(3)the framed short-leg shear wall inclined column-shaped transfer plane framework has a good yield, damage mechanic,good ductility nature, dissipation ability and a stable deformation nature in elastic and elastic-plastic deformation, and the lateral rigidity of transfer-stories is large, making it difficult to engender structure weakness stories.(4)Along with the higts of beam being enhanced, the yield load and dissipation ability is enhanced, but the ratio of the limit load and yield load and theductility ability is reduced.If the design is reasonable, the inclined column-shaped transfer structure can get better seismic behavior and is easier to implement the aseismatic design principles, including "strong column and weak beam, strong shearing and weak bend, stronger nodes". So, it is a new type transfer structure worthy of popularizing.