A hybrid grid cylinder that can increase the instability load of column groups

Abstract

The invention discloses a hybrid grid cylinder capable of increasing grouped column instability loads, and relates to the technical field of structural engineering.The hybrid grid cylinder comprises a steel grid cylinder, multiple external pressing rings, prestressing cable discs and spatial oblique radiation prestressing cables; the external pressing rings are embedded into the steel grid cylinder in the height direction, the prestressing cable discs are arranged at the axis of the steel grid cylinder, the prestressing cable discs and the external pressing rings are arranged in a staggered mode in the height direction, the spatial oblique radiation prestressing cables are connected between the external pressing rings and the prestressing cable discs, and the spatial oblique radiation prestressing cables, the external pressing rings and the prestressing cable discs jointly form an internal spatial cable support system of the hybrid grid cylinder.The cable support system is equivalent to the mode that a plurality of spoke-type rigid discs are embedded into the grid cylinder in the height direction in the horizontal plane, therefore, out-plane deformation of the grid cylinder can be effectively restrained, the sensibility of the grid cylinder to initial geometric defects is lowered, and then the grouped column instability loads of the grid cylinder are increased; the cable support system and the grid cylinder jointly form a truss system in the vertical plane, therefore, the lateral stiffness and the bearing capacity of the grid cylinder are improved, and the hybrid grid cylinder is an efficient and economical novel structure system.

Description

technical field [0001] The invention relates to the technical field of structural engineering, in particular to a novel hybrid grid cylinder, in particular to a hybrid grid cylinder capable of increasing the instability load of group columns. Background technique [0002] As a load-bearing structure for vertical loads, hyperboloid or cylindrical grid tubes have been increasingly used in engineering applications in recent years due to their beautiful appearance and good permeability. The most typical ones are the China Animation Museum and the Guangzhou New TV Tower. The former uses a hyperbolic diamond-shaped grid tube, and the latter uses a three-way grid tube with obvious differences in stiffness directions. [0003] Whether it is a hyperboloid grid tube or a cylindrical grid tube, under the action of vertical load (gravity load) and bending moment (wind or earthquake), due to its large plane size, the overall instability of the tube will not occur, but it is extremely It...

AI Technical Summary

Problems solved by technology

[0004] The column group instability load of the grid tube is closely related to its height and diameter. With the increase of the size of the grid tube, especially the increase of the plane size, the column group instability load will decrease sharply. Therefore, in order to meet the bearing capacity requirements, it is necessary Increase the size of the peripheral components (grid columns) of the grid tube, but this will reduce the permeability of the grid tube structure, and the design economy is poor

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