Analysis On The Mechanical Behaviors Of Transfer-Beam In Frame-Supported Short-Leg Shear Wall Structure

Since the high-rise residential building which adopts short-leg shear wall structure can ensure satisfactory natural lighting and ventilation in each unit, flexible architectural composition, what's more, beams and columns are hidden in walls, it has been favored by the proprietor. In practical application, it's necessary to use the bottom one or several layers of the small bay residential building which adopts short-leg shear wall for large space public building, so the transfer story is set to link the up and down structures. Beam-shaped transfer story is the most commonly used in practice. And then, frame-supported short-leg shear wall structure is formed. At present, the theoretical research of this structure system need to be perfected, studies on the mechanical behaviors of transfer-beam is also not in-depth.According to the analysis on the total model and component model of reinforced concrete frame-supported short-leg shear wall structure, the mechanical behaviors of transfer-beam which is critical structural member are researched especially in this dissertation. The main aspects of content are listed as follows: 1.This dissertation makes the response spectrum analysis on a typical frame-supported short-leg shear wall structure by ETABS, a software for analysis and design of building. The main conclusions:the pier walls in the midspan position make transfer-beam receive a larger positive bending moment in middle under vertical load; the pier walls in the end make the transfer-beam receive a larger shearing force below the walls under both vertical and horizontal load; collaborative work performance between the wall and the beam goes well although the wall is very short, further more, this behavior can be more effective when the height and thickness of walls increase.2.This dissertation analyses the stress-distribution and transformation behaviors on transfer-beam under vertical load by ANSYS, a universal finite element analysis software. The main conclusions:the stress-distribution of transfer-beam shows similarities with that of ordinary frame beams under vertical load when the width of hole in the upper wall is long enough; both the effect of vertical transmission arch and collaborative work performance between the wall and the beam are strengthened with the decrease of the hole width, meanwhile, the bending deformation of transfer-beam added.3.This dissertation makes drab loading simulation based on transfer-beam with different stiffness, different ratio of reinforcement and that of stirrup by ANSYS, a universal finite element analysis software. The main conclusions: with the decrease of the stiffness of transfer beam, its bearing capacity decreased while ductility increased; with the added of the radio of reinforcement, the bearing capacity of the beam increased while the deformability decreased a lot; with the rise of the radio of stirrup, both the bearing capacity and deformability of the transfer-beam increased.The dissertation makes a lot of effort to study the influence of various parameters to the mechanical beaviors of transfer-beam, in order to providing references for research and design in future.