A multi-layer bolted ball joint used in a tensegrity structure

Abstract

A multi-layer bolt-sphere node for a tensioned integral structure comprises an internal bolt sphere, a plurality of external bolt hemispheres, a plurality of connecting bolts and a plurality of rolling bearings. A cambered groove is formed in the outer circumferential face of the internal bolt sphere, and the rolling bearings are arranged in the groove. The external bolt hemispheres are each of a shell structure, and a tension cable hole is formed in each external bolt hemisphere. The outside of the internal bolt sphere is covered with at least one outer layer formed by two external bolt hemispheres. The connection bolts penetrate through the edges of the external bolt hemispheres to be inserted into the internal bolt sphere. The multi-layer bolt-sphere node has the advantages that installation is convenient, and the internal bolt sphere and the external bolt hemispheres are spliced rapidly through the connecting bolts; construction is convenient and quick, non-interference connection of multiple tension cables can be achieved on the same bolt sphere node, and accordingly interference among the tension cables on the same node can be prevented, and forming of the tensioned integral structure at a time can be achieved; the multi-layer bolt-sphere node has the advantages of being scientific and reasonable, convenient to construct and capable of being controlled on site easily.

Description

technical field [0001] The invention belongs to the technical field of civil engineering, and in particular relates to a multi-layer bolt ball joint used in a tensioned integral structure. Background technique [0002] The tensegrity structure is a stable self-balancing structure formed by some discrete compression members contained in a group of continuous tension members, usually by passing some non-continuous compression members without self-weight through a series of continuous tension members. Frictionless node connections become represented as a whole. Among them, the compression member has both tensile and compressive strength, while the tension member only has tensile strength. For a tensegrity structure, the stiffness of the structure is provided by the balanced prestress between the compression member and the tension member. Before the prestress is applied, the structure has almost no stiffness, and the size of the initial prestress has a great influence on the sh...

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Problems solved by technology

[0003] However, the current overall tensioning process of the overall structure is complicated, requiring multiple devices to work together to meet the shape requirements of the architectural design, so it is not suitable for structures with complex architectural shapes, and only relatively simple ones are used in large public buildings such as stadiums. Structural form, so the scope of use is affected

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