Simply supported prestressed double-layer and triple-layer combined torsion reticulated shell structure with super large span

Abstract

The invention discloses a super-large span peripheral simply-supported prestressed double-layer and three-layer combined torsional reticulated shell structure, which comprises a torsional reticulated shell (1); framework columns (2) with unequal heights are arranged on the periphery of the torsional reticulated shell (1) according to the column reticulated distance requirement, and a central framework column (3) is arranged in the center of each side of the torsional reticulated shell (1); the overhung parts of the torsional reticulated shell (1) are simply supported at the tops of the framework columns (2); and a prestressed steel cable (4) is arranged on the central framework column (3) in the center of each side of the torsional reticulated shell (1). The combined torsional reticulated shell structure has good structural integrity, the lateral rigidity resistance of the structure is greatly improved, the hidden danger caused by the super-large overhung parts is eliminated, the steel for the structure is further optimized, the consumption of the steel is greatly reduced, and the requirements of 'energy conservation and synergism' are met; and the structure is particularly suitable for a super-large span torsional reticulated shell roof with span of 120 to 180 meters, and is a safe, reasonable, advanced and economic novel structural system.

Description

technical field [0001] The invention relates to a new type of steel twisted reticulated shell roof structure, in particular to a super large span (120m≦L≦180m) peripheral simply supported prestressed double-layer and three-layer combined twisted reticulated shell roof, which belongs to the technology of building steel structures field. Background technique [0002] In the mid-1990s, several prestressed combined torsion reticulated shell structures appeared successively. For example, the Qingyuan City Gymnasium in Guangdong Province has a hexagonal plane and is supported by six double-layer torsion reticulated shells on the tops of six columns. Above, this is also the lowest point of the twisted reticulated shell, the span from column edge to column edge is 68.418m, the maximum overhang is 12.615m, the diagonal span of the hexagonal roof is 93.645m, and the entire roof forms a negative Gauss Curvature, that is, cutting along the edges of two adjacent columns, the reticulated...

AI Technical Summary

Problems solved by technology

However, after changing from two layers to three layers, the number of nodes of the entire reticulated shell increases by 1 / 3, and although the length of the web members of the reticulated shell decreases, the number of members (including the middle chord) increases significantly

At the same time, it also increases the difficulty of construction. The conventional three-layer twisted reticulated shell does not achieve the purpose of reducing steel consumption.

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