Ultra-large span cylindrical surface compound rods giant grid structure

A technology of grid structure and combined rods, which is applied in the direction of building structure and construction, can solve the problems of complex processing structure, increased steel consumption, and overall instability, so as to save steel consumption, reduce project cost, and improve Overall Stiffness and Stability Effects

Inactive Publication Date: 2009-07-08
HUNAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this kind of double-layer cylindrical reticulated shell structure will have some inevitable problems with the further increase of the span. For example, when using the usual length rods within 5m, the structure will easily lead to overall instability due to the small thickness-span ratio; When the rod is too long, it is easy to cause the instability of the pressure rod due to excessive internal force, and the resulting increase in steel consumption, etc.
Some literature analysis shows that the effect of increasing the number of layers on improving the overall performance of the structure is not obvious. What is more important is that it is not feasible to increase the span of the structure by using multi-layer forms to break through the limitation of internal forces. , the node makes the processing structure more complex due to too many connected rods

Method used

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  • Ultra-large span cylindrical surface compound rods giant grid structure
  • Ultra-large span cylindrical surface compound rods giant grid structure
  • Ultra-large span cylindrical surface compound rods giant grid structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Example 1: Combining figure 1 , figure 2 , image 3 , Figure 4 :

[0020] The whole structure is composed of main structure I and substructure II arranged in the main structure. The main structure is a large grid structure composed of lattice components, and its grid size is 10-30m. The sub-structure is an ordinary double-layer flat grid, and the sub-structure is embedded in the large grid in the form of four-point support, forming a structural form of a large grid with a small grid. Supports 10 are provided on the two longitudinal sides of the main structure of the large grid. The load of the entire structure is borne by the relatively sparse and grand main structure, and then transmitted to the support 10 by the main structure.

[0021] The large grid structure composed of lattice components is composed of lattice composite rods 2 hinged and connected through large-sized welded hollow spherical nodes 1 . The lattice type combined rod of the present embodiment ...

Embodiment 2

[0022] Example 2: Combining figure 1 , figure 2 , Figure 5 , Figure 6 :

[0023] The difference between this embodiment and Embodiment 1 is that the lattice type combined rod of this embodiment is a square cross-section combined rod, and its two ends are pyramid-shaped, and the outside of the middle section is formed by 4 long main pipes A bracket, a number of square diaphragms 5 perpendicular to the long main pipe and oblique web bars 6 with an inclination angle of 45-55 degrees to the diaphragm are arranged inside the bracket.

[0024] The square diaphragm is a square frame formed by four equal-length round steel pipes 8, and the square frame is connected with the long main pipe 4 through a direct intersection node. A support rod 9 is added in the regular quadrilateral frame to prevent the motor deformation of the section.

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Abstract

The invention discloses a super-large span cylindrical combined bar system large grid structure, which comprises a main structure and a substructure which is arranged inside the main structure, and is characterized in that the main structure is a large grid structure which consists of lattice type members, and the grid dimension is between 10 and 30 meters; and the substructure is a common double-layer flat-plate grid rack and is embedded into a large grid in a mode of four-corner supporting to form a structural form of making a small grid sleeved into the large grid. The super-large span cylindrical combined bar system large grid structure can effectively overcome the defect of destabilization of compression bars, greatly improve the overall rigidity and the stability of the structure, avoid destabilization of the compression bars, save the steel consumption, and reduce the manufacturing cost of engineering. Moreover, both combined bars and the flat-plate grid rack substructure can be manufactured and processed in a factory into basic components with small number, conveyed and assembled on the spot into an overall structure, so that the field assembly workload is greatly reduced and the construction period is shortened. The super-large span cylindrical combined bar system large grid structure is suitable for a spatial reticulated shell roof structure with a super-large span of more than 200 meters.

Description

technical field [0001] The invention relates to the field of space structures in the construction industry, in particular to a super large-span cylindrical surface combined bar system giant grid structure. Background technique [0002] In stadiums, convention and exhibition centers, theaters, large shopping malls, factory garages and other buildings, it is a construction project in which the upper part is a large-span space steel structure and the lower part is a reinforced concrete structure. At present, a structural form widely used in large-span spatial structures is the double-layer cylindrical reticulated shell structure. With the development of society, the large-span space will develop towards super-long-span. However, this kind of double-layer cylindrical reticulated shell structure will have some inevitable problems with the further increase of the span. For example, when using the usual length rods within 5m, the structure will easily lead to overall instability d...

Claims

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Application Information

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IPC IPC(8): E04B1/342E04B1/58
Inventor 贺拥军周绪红
Owner HUNAN UNIV
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