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Rolling friction joint suspended-dome structure and construction method thereof

A rolling friction, chord-supported dome technology, applied in the dome-roof structure, arched structure, roof and other directions, can solve the problems of inconsistency in the size distribution of internal force with the design, adverse effects on the mechanical properties of the chord-supported dome structure, and uneven tension, etc. The effect of enhanced self-adjustment function, high construction efficiency and reduced construction cost

Inactive Publication Date: 2009-07-15
ZHEJIANG UNIV +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This is because the geometric relationship between the hoop cable and the vertical pole connection node and the sliding friction properties between them determine that the friction force between the hoop cable and the vertical pole connection node must be proportional to the prestress of the hoop cable and If the value is large, the loss of prestress will inevitably lead to unequal tensile force of adjacent hoop cable segments at each node, and eventually lead to the hoop cables, meridional cables (rods), and The actual internal force size and distribution of the vertical rods and reticulated shell members are inconsistent with the design, which will have an adverse effect on the mechanical properties of the entire suspensive dome structure

Method used

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  • Rolling friction joint suspended-dome structure and construction method thereof
  • Rolling friction joint suspended-dome structure and construction method thereof
  • Rolling friction joint suspended-dome structure and construction method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0034] Such as image 3 As shown in b and 3c, the described node is a rolling friction type I node, including a vertical rod 3, two warp rods 2, a U-shaped steel plate 4 placed horizontally and a hollow concave ring 10; the top of the U-shaped steel plate 4 There are screw holes 6, the bottom of the U-shaped steel plate 4 is a non-through hole, the upper surface of the U-shaped steel plate 4 is welded with the pole base 7, the pole base 7 is welded with the vertical pole 3, and the arc-shaped surface of the U-shaped steel plate 4 is welded 2 Ear plates 8, each ear plate 8 is rotatably connected with the respective warp rods 2, the hollow concave ring 10 is installed in the U-shaped steel plate 4, and the cylindrical shaft 11 is directly inserted from the U-shaped steel plate 4 through the hollow concave ring 10 To the dead hole below the U-shaped steel plate 4, the middle part of the cylindrical shaft 11 is an interference fit with the hollow concave ring 10, and the two ends ...

Embodiment 2

[0041] Such as Figure 6 As shown, the node is a rolling friction II type node, including vertical rods 3, 2 warp rods 2, and a T-shaped round platform 15; Concave circular ring 10', L-shaped safety protection steel plate 19, T-shaped round table 15 upper plane respectively welded with 2 ear plates 8 rotationally connected with warp rod 2 and ear plate 18 rotationally connected with a vertical pole 3, the ring The cable 1 penetrates into the L-shaped safety protection steel plate 19 and the concave ring 10', and the circular cable 1 forms a sliding fit with the concave ring 10'.

[0042] The manufacturing process of the rolling friction type II node is as follows: Figure 7 a, 7b, 7c, 7d, 7e. Process it into a T-shaped round table 15 by casting or cutting process; Drill the bottom screw hole 16 at the protruding part of the T-shaped round table 15; Drill the side screw hole 17 on the side of the T-shaped round table 15; Weld the ear plate 18 of the vertical rod; The ear pla...

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Abstract

The invention discloses a rolling friction node suspension dome structure and a construction method. It is composed of a single-layer reticulated shell and a cable-strut structure formed by nodes; the nodes are rolling friction nodes. According to the length of 5 to 10 cable segments as a line unit, divide a continuous hoop cable into several line units and set the same number of tension points. Firstly stretch the tension points simultaneously to 105%~120% prestressed construction control value, and then relax back to 100% prestressed construction control value. The internal force difference between the adjacent cable sections of the node is further reduced, so that the internal force of each cable section in a circle of hoop cables is basically kept equal. After the hoop cables of other rings are tensioned in sequence, the prestressed construction of the entire suspendome structure is completed. The invention has high construction precision, high construction efficiency, low construction cost and safe structure use.

Description

technical field [0001] The invention relates to a large-span prestressed space reticulated shell structure, in particular to a rolling friction node suspend dome structure and a construction method. Background technique [0002] The prestressed construction methods of the suspension dome structure are: (1) stretching the circular cable method; (2) tensioning the longitudinal cable (rod) method; (3) jacking up the vertical pole method. Due to the large number of warp cables (rods) and vertical poles and their relatively independent geometric positions, the construction of the latter two methods is very cumbersome. The hoop cables are all or partially continuous, so method 1 is the most simple and efficient, and is the preferred method for prestressed construction of most suspensive dome structural engineering. However, this construction tensioning method also has a very prominent shortcoming. During the tensioning process, there will be relative sliding between the hoop cabl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E04B7/08E04G21/12E04B1/342E04B1/32E04B7/14
Inventor 卓新董石麟张国发楼道安吴建挺齐宇周观根
Owner ZHEJIANG UNIV
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