Interaction Between Two Shear-flexural Structures Under Horizontal And Vertical Loads

Dual system, such as Frame-shear wall structures,Frame-bracing structures, Frame-tube structures ,are widely used in engineering.The deformation of frame is shear type and the deformation of shear wall (tube structure) is flexural type.Frame and shear wall are combined by floors and have the same horizontal deformation.Reaserch of the state-of-the-art on dual system consider shear wall structure as a flexural type cantalever and consider frame structure as a shear type cantalever, ignoring the shear deformation of shear wall and the flexural deformation of frame. But in engineering practic,dual system contain shear-flexural type(intervenient two extreme cases). Such as: tube-in-tube structural system and two discrepant side-by-side tube structurals. In these cases, one of them cann't be considered to pure shear type.This thesis studied interaction between two shear-flexural structures under horizontal load. Different from simplified model for Frame-wall system, the basic differential equations need two steps to solve.The examples show that the efficiency of the flexural rigidity in one structure to participate in resisting load together with the other structure in a dual system is affected by its shear stiffness .Meamwhile, the efficiency of the shear stiffness in one structure to participate in resisting load is affected by its flexural rigidity.Comparison with results of FEM shows a good correlation between them.Considering the second-order effect of the dual system,the thesis deduced the analytic solution of flexural and shear deformation and the moment amplification factor of columns in frame,and the relationship between the critical load of the dual system and the critical load of a single stnicture.Comparison between the rusults of the second-order and the first-order were carried out by calculating amplificaiong factors.