Static Elastic Experimental And Theory Research On Frame-Tube Supported On Frame-Supported Tube Tall Hybrid Structures

The tube structure is widely accepted as an economic solution for tall building structures. It is one of the important style in tall buildings. Deep beams and denser columns are basic forms of frame-tube structures. Deformed plane will not remain plane in frame-tube structures because of the influence of shear lag. Two aspects are focused on in this thesis: one is the simple analysis method for tube structures under static loads; another is a test model study on static elastic property and on sub-structure method for frame-tube supported on frames-core tube tall hybrid structure. The main contents are listed as follows:1.The static elastic test of a 13 stories 1/10 scale frame-tube supported on frames-core tube tall hybrid structure model is accomplished. The influence of lateral load and top vertical load on horizontal displacement,rotation-displacement and property of structure model is studied.2.The equivalent continuous system method can be used, in which the main influencing parameters of shear lag are discussed. The frame-tube structure is equivalent to plane frame structure basic of the equivalent corner-column method, the shear deformation of member with rigid area and shear stiffness of flange panels is taken into account. The results are in agreement with those of the simple method and space-frame analysis programs.3.The stiffness calculation of members in steel-concrete mixed structure and the influence of top vertical load on lateral stiffness and stability of building are discussed.4.The simple analysis method for frame-tube supported on frames-core tube high-rise structure basic of sub-structure method with release constrained jiont ordly is put forward. The girder transfer-storey is assumed a rigid layer. The structure is divided into two parts, part one is a frame-tube structure above the transfer-storey; the other is part two. The displacements and forces of the structure are decoupled calculated which the influences between each sub-structures are taken into account. The results are in agreement with those of the simple method,model test and space-frame analysis programs.