V-shaped radial string branch mesh dome

Abstract

A net dome with V shape radial sling includes stay bar, radial sling, hoop stress sling, upper net structure and steel tube. The top end of the stay bar is connected to the node of the upper net structure; the bottom end is connected to the steel tube. Radial slings cross along the loop stress sling in a V shape, with the crossing point connected to the bottom end of the stay bar, the other two ends connected to different nodes of the upper net structure. The loop stress sling threads through the steel tube and flexible connect to the stay bar.

Description

technical field The invention relates to a dome used in the construction field, in particular to a V-shaped radial cable-suspended grid dome. Background technique The development of the economy has promoted the development of the spatial grid structure, and at the same time put forward higher requirements for the spatial structure: larger span, safer and more economical. Traditional spatial grid structures such as single-layer reticulated shells, double-layer and multi-layer reticulated shells, and flat grid structures have been widely used due to their simple structure and low construction difficulty. But they have the following shortcomings respectively: (1) The single-layer reticulated dome and the thinner double-layer reticulated dome will generate a large thrust at the support, and a strong support structure is needed to ensure its safety and reliability, which increases the burden on the support structure and wastes materials. (2) The span of a single-layer reticu...

AI Technical Summary

Problems solved by technology

(2) The span of a single-layer reticulated shell is relatively small, generally not more than 60m according to the current code, which cannot meet the needs of building a larger-span space structure

(3) The internal force distribution of traditional space grid structure components is not uniform, showing a stepped distribution from the inside to the outside, especially near the support, the peak value of the internal force is very large, which is not conducive to the unification of component specifications, and brings many problems to processing and construction. Inconvenient, while affecting the overall aesthetics of the structure

(4) Under the action of external load, the single-layer reticulated shell and the thin double-layer reticulated shell may suddenly appear the overall instability that deviates from the equilibrium position, or the instability that extends to the entire structure due to local damage

(5) Although double-layer and multi-layer reticulated domes can partially overcome the weakness of single-layer reticulated domes, their space occupation and material consumption also increase to varying degrees

(6) Although the traditional flat grid structure does not generate support thrust, its force transmission path is unreasonable, the form is single, the internal force distribution is uneven, and the span that can be spanned is smaller

2) The hoop cable, radial cable and strut are connected at the cable brace node. Since the radial cable is a single cable, it cannot resist the normal force outside the plane determined by the radial cable and the strut. When the hoop cable is used, due to the friction force of the cable brace node, the radial cable and the strut deviate from the equilibrium position, and the lateral stability is difficult to ensure

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