Node Design And Dynamic Characteristics. Cable Dome Analysis

Cable Dome is one of Tensegrity Systems with high structural efficiency. This innovative type of space structure with economical cost and ingenious design makes an extensive interest and attention all over the world, although it is not put into practical engineering until in space structures with large-span such as the gymnasium. It is obvious that Cable Dome has very wonderful developing future and important value in practice. However, so far, the technique of design and construction of Cable Dome is mastered only by American. They have built several Cable Domes in America. A great of research are carried on in other countries such as Japan and Canada as well. The studies on Cable Dome in our country is few. Especially, the research about joints and dynamic characters is seldom reached. So the work of this paper tries its way to the theory of Cable Domes.The first part has reviewed Tensegrity Systems, the development of Cable Domes and its practice in architectures. Author summarizes the definition and natures of Tensegrity Systems, discusses the geometry and types of Cable Domes. As these this part has finished the basic research of Tensegrity Systems and Cable domes.The second part studies the joints design of Cable Domes. First, author considers the connection strength between steel cable and joints, the requirements about joints function, the mechanics performance ofjoints. Second, according to conceive to design and process model. Third, do the experiment to decide the design strength and maximum load. At last, the author through the Ansys to analyses the model and accomplishes the research of the joints' real properties such as the force and deformation. So it is-can be safe for joints in real buildings.The paper has discussed the dynamic properties of Cable Domes. And according to real conditions has finished relative experiments. Consequently, in theory the author utilizes Subspace and Lanczos methods to analyses, experimental data. Through the comparing, find in 'limiting elements calculation the different boundary can affect dynamic properties, for example, the important place of lateral vibration, vertical vibration, shrinking vibration and vertical distortion vibration in automatic frequency.The paper has introduced two new types of special structures(the beam string structures and the cable-bar structures). And analyses their dynamic properties through Ansys. Finally, contrasts and analyses Cable Domes structure.In the last part, the studies of this paper were concluded.