Prestressing force steel structure rolling type stretching cable node

Abstract

The invention relates to a pre-stress steel structure rolling type tension cable node, which comprises a non-continuous cable end body, a continuous cable end body, a node waist, a cable cavity, a support rod, an ear plate, a rolling shaft, a continuous cable and a fixing briquetting. The non-continuous cable end body is connected with the continuous cable end body through the node waist, the ear plate is arranged on the non-continuous cable end body, the support rod is connect to the non- continuous cable end body; the cable cavity is provided in the continuous cable end body, the continuous cable passes through the cable cavity and rotates around the rolling shaft, the fixing briquetting is connected with the continuous cable end body through bolts to fix the continuous cable. The node has the advantages of being capable of freely sliding in the continuous cable tension process, thereby overcomes the disadvantages of uneven cable force caused by the friction force between the cable and the node, and meets the need of fixing after the cable is tensioned, the node is particularly applicable to the tension cable sliding nodes in the structures of suspended-domes, cable domes, beam strings, cable trusses and suspension bridges.

Description

technical field [0001] The invention relates to a building structure node, in particular to a drag cable sliding node for prestressed steel structures. Background technique [0002] At present, various structural forms with prestressed cables are widely used in various buildings. This type of structure uses steel cables with high tensile strength instead of other grades of steel, so that the cross-section of the components is reduced and the self-weight of the structure is reduced, so it is possible to build a lighter structure and span a larger span. However, although the steel cable has a high tensile strength, it is a flexible building material. Pretension must be applied to the steel cable to generate prestress in the components, so that the system can have rigidity and become a structure. The prestress is usually applied by tensioning steel cables, and the stress transmission in the steel cables is continuous. When there are nodes connected to other components in serie...

AI Technical Summary

Problems solved by technology

The present invention adopts rolling friction to replace the sliding friction between the node and the cable body, which well solves the problem of the friction between the steel cable and the node during tension; and adopts the fixed pressing block to solve the problem of fully fixing the steel cable after tensioning; At the same time, the present invention can simplify the joint form, reduce the complex stress and stress concentration phenomenon generated under complex shapes, improve the working condition of the joint, optimize the material and form of the joint, and make it possible to use lighter materials and a thinner and thinner form. And under the conditions of node stress level, node shape, node space attitude balance (based on the principle of force action line centering), and installation process, the node can be designed as a detachable node for separate installation

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