Single-layer latticed shell structure with tension rings

Abstract

The invention discloses a single-layer latticed shell structure with a tension ring. Comprising a main reticulated shell structure (I) and a supporting structure (II) which are connected, the main reticulated shell structure (I) comprises a shell (1) and a tension ring (2) located on the outer surface of the shell (1), and the tension ring (2) is in a grid shape; the supporting structure (II) is composed of a plurality of connected V-shaped supports (8), and the V-shaped supports (8) form a ring and are connected with the main body latticed shell structure (I). The curved surface of the main body latticed shell structure is an ellipsoidal surface, all rod pieces are axial force rod pieces through shape finding, and the bending moment is almost zero. The latticed shell is composed of a shell body and a tension ring, under the action of vertical loads, the latticed shell mainly bears axial pressure, and an annular rod piece of the tension ring mainly bears pulling force. And under the action of a horizontal load, the V-shaped support can transmit the load through a pulling-pressing effect, and the shearing force and the bending moment of the rod piece are also small.

Description

technical field [0001] The invention relates to a single-layer reticulated shell structure with a tension ring, which belongs to the technical field of building structures. Background technique [0002] The reticulated shell structure is a very commonly used structural system in large-span space structures at present, and the single-layer reticulated shell structure has been favored by architects at home and abroad in recent years because of its small structural thickness, light weight, and beautiful appearance. used in engineering practice. However, with the further increase in the demand for structural spans, there are inevitably some problems in the design of single-layer reticulated domes. [0003] 1) When the span of a single-layer reticulated shell structure is large, if the height of the reticulated shell is insufficient and the curvature of the shell surface is too small, the reticulated shell may "turn over" under the action of vertical load, resulting in a change ...

AI Technical Summary

Problems solved by technology

However, with the further increase in the demand for structural spans, there are inevitably some problems in the design of single-layer reticulated domes

[0003] 1) When the span of a single-layer reticulated shell structure is large, if the height of the reticulated shell is insufficient and the curvature of the shell surface is too small, the reticulated shell may "turn over" under the action of vertical load, resulting in a change in the structure's stress shape and collapse

[0004] 2) When the grid of the large-span single-layer reticulated shell structure is large, the slenderness ratio of the rod may be insufficient, and the bar will be unstable under the action of the external load; while the grid is small, it will cause an increase in the amount of steel used. And lead to complex connection of nodes and high construction difficulty

[0005] 3) The single-layer reticulated shell structure has strong geometric nonlinearity. When the reticulated shell has initial geometric defects due to construction errors and other reasons, the internal force distribution of the members will change significantly compared with the original design, which may lead to a decrease in structural safety performance

[0006] 4) The rods of the reticulated shell mainly bear the axial force. Under the action of temperature, the expansion and contraction deformation of the rods is difficult to be released, which will generate a large additional internal force, which increases the bearing capacity requirements of the reticulated shell and surrounding components

[0007] 5) The single-layer reticulated shell structure system has a single force transmission path and poor redundancy. When some key components fail, the structure may undergo continuous collapse

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