Study On Wall-Beam-Plate Joints And Structural Measures Of Dispersive Tube Structure

Dispersive tube structure is a series of relatively small size tube speads structure plane as load-bearing components and would be combined by beam floor to constitute a whole structure to provide lateral resistance stiffness. Dispersive tube structure can overcome the shortcomings of traditional structures and has certain advantages. Dispersive tube structure can be designed by SATWE in software PKPM. The joints have complicated forces that may cause security risks, so the joints should carry out a special study.This paper uses ANSYS to numerically simulate a typical wall-beam-plate joint in a dispersive tube structure model designed by software PKPM, studies mechanical behavior of the joint, proposes structural measures for problems of the joint through numerical simulation.Under design load the study found that, walls appear cracks affects the structural safety on higher floors. Moment at beam end arouses tensile pressure at the bottom and compressive stress at the top of the beam in wall concrete not in contact with beam, walls compressive stress on the higher floors can not offset the impact of moment at beam end, wall concrete on both sides of the bottom bear tensile stress, wall crack. The relative slipping between reinforcement and concrete is very small, that the two can work together.Structural measures are visible beam, concealed column, hidden beam, that are proposed to solve the problems mentioned above. The numerical simulation study found that, structural cracks have no significant effect in model with concealed column and hidden beam,the cracks in the wall disappear in model with visible beam which is favorable to structure. Joints reinforcement tensile and compressive stress reduce little in model with concealed column. Joints reinforcement tensile stress reduces and compressive stress increases slightly in model with hidden beam. Joints reinforcement tensile and compressive stress reduce significantly in model with visible beam, and visible beam improve uneven loading of joints reinforcement. Model with concealed column and hidden beam can not improve problem of wall cracks well that caused by tensile stress. In model with visible beam, moment at beam end transfer the Impact on concrete to the range of visible beam, concrete tensile and compressive stress reduce, the problem of wall cracks that caused by tensile stress is improved significantly.Within three structural measures, visible beam is the most favorable to slove the problem of unreasonable force in wall-beam-plate joint, joints of the higher floor recommend the measure with visible beam.