Self-stressing cable rod and rigid net shell combined structure and construction method thereof

Abstract

The invention provides a self-stressing cable rod and rigid net shell combined structure. The structure comprises a self-stressing cable rod structure and a rigid net shell, and the self-stressing cable rod structure and the rigid net shell are connected by a short column. The self-stressing cable rod structure is a self-stressing system consisting of a tension-only tension cable and a pressure-only pressure bar, and the stiffness is completely determined by the magnitude of self-stress; the rigid net shell structure is welded by a rigid rod member; the self-stressing cable rod structure and the rigid net shell are connected by the short column, and by adjusting the stiffness ratio between the self-stressing cable rod structure and the rigid net shell, the purpose of the common force is achieved. In the construction method, a rigid net shell member can be installed when the self-stressing cable rod structure is constructed as a bracket, thereby effectively reducing the construction cost. The structure has the advantages of high material utilization rate, convenient construction and the like, and can be applied to various large-span spatial structures.

Description

technical field [0001] The invention belongs to the technical field of structural engineering, and in particular relates to a combined structure of a self-stressed cable rod and a rigid reticulated shell and a construction method thereof. Background technique [0002] The self-stressing cable-strut structure is an efficient self-balancing structural system of prestressed cable-struts. By placing the compression members in the sea of ​​cables, special aesthetics and efficient use of materials can be achieved. Therefore, this idea was tried in the field of sculpture at the beginning of its generation, and then representative self-stressed cable-strut structures such as tensioned integral masts and tensioned integral towers appeared. In fact, due to the inherent characteristics of the self-stressed cable-strut structure in line with the laws of nature, the characteristics of materials and sections are utilized to the greatest extent, and super-long-span buildings can be built w...

AI Technical Summary

Problems solved by technology

However, the self-stressed cable-strut structure that only includes tension cables and compression rods in the strict sense has not been applied in building structures.

First of all, since it has no stiffness in the unstressed state, the structural stiffness is completely provided by the self-stress force. If better stiffness is required, a greater self-stress must be applied to the member, and the compression member will bear a lot of pressure. , causing the section of the cables and compression members to be too large, and the huge pre-tension force will also bring great difficulty to the construction; secondly, the self-stressed cable-strut structure is greatly affected by external disturbances, and the response under dynamic excitation is more obvious , and the impact time is long, it is difficult to eliminate the vibration impact in a short period of time by the damping of materials; finally, the self-stressed cable-strut structure is a flexible structure, which is difficult to connect with the rigid roof and has a complex structure

[0003] Although the reticulated shell structure is a rigid structure with high in-plane rigidity, fewer rods, and beautiful appearance, it is widely used in large-span space structures, but the out-of-plane rigidity of the structure is relatively small, and it is more sensitive to initial defects. Prone to overall or partial instability during the process

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