Seismic Experimental Study Of Inclined Column-shaped Transfer Floor Of Frame Short-leg Shearwall Structures In Varied Angle Of Inclined Column

In practical projects, more and more high-rise buildings use conversion layer structure. In a variety of modes of high-rise buildings, beam type conversion gets very widely application because of its advantages such as stress clear, simple design, simple construction and so on. Inclined column conversion is a new kind of conversion form, and is a kind of beam type conversion. For inclined column-shaped transfer floor of frame short-leg shear wall structures, how to change of the force characteristic and ductility of conversion structure when inclined column angle changes? Around the idea and combining the results before, this thesis carries out the pseudo static test, which are subjected to vertical loads and horizontal cyclic loads, respectively on two specimens of the framed short-leg shear wall inclined column-shaped transfer plane framework with the different inclined column angle. Observed and described the development of cracks, recorded crazing load, yielding load, limiting load, determined the change of displacement of the conversion layer part, collected the strain of the steels in key components, analyzed and studied the test phenomena and the strain, and further understanded the stress mechanism.On the basis of the test and analysis results, the paper compared and studied the stress mechanism, carrying capacity, destruction features, displacement ductility coefficient, deformation capacity, failure mechanism and seismic performance of the two specimens. The paper gets the results that how to change of mechanical properties and seismic performance of conversion structure when inclined column angle changes. The analysis results provide theoretical support and reasonable design proposal for the use of inclined column type conversion structure in practical projects.Through the research and analysis results show that, for inclined column-shaped transfer floor of frame short-leg shear wall structures, the force characteristic and damage form is different when inclined column angle changes. The ductility of middle shear wall of specimen W11-2 is poorer and its damage is serious; but the ductility of middle shear wall of specimen W12-2 gets improvement and its damage is light. For specimen W12-2, serious damage happened in the inclined column top. The area where inclined column and transfer beam intersects should strengthen the reinforcement and encryption stirrups, and achieve "strong node" in the aseismic design.