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Bottom chord node fastening device of cylindrical surface suspended structure and prestresstensioning method thereof

A fastening device and cylindrical surface technology, applied in the direction of structural elements, building components, building structures, etc., can solve the adverse effects of mechanical properties of chord-braced structures, the size and distribution of internal forces do not match the design, and the buckling of fasteners under force, etc. problem, to achieve the effect of good anti-corrosion effect, easy operation, and prevention of stress buckling

Inactive Publication Date: 2011-09-14
浙江东南网架股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But at the same time, it also brings a series of problems. In the string truss, it is difficult to effectively connect and fasten the prestressed cables of the lower chord with the vertical struts, which makes the cables easy to eccentric, increase friction, and cause a large loss of prestress , the fasteners buckle under stress, and eventually lead to the actual internal force size and distribution of the cables, struts, and reticulated shell members of the suspensive reticulated shell structure after the prestressed construction is completed. adversely affect

Method used

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  • Bottom chord node fastening device of cylindrical surface suspended structure and prestresstensioning method thereof
  • Bottom chord node fastening device of cylindrical surface suspended structure and prestresstensioning method thereof
  • Bottom chord node fastening device of cylindrical surface suspended structure and prestresstensioning method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Example 1: as figure 1 , figure 2 and image 3 As shown, a lower chord node fastening device of a cylindrical chord support structure includes a strut connecting piece 1, the strut connecting piece 1 is a steel casting, and the side wall of the strut connecting piece 1 is provided with There are two cable connection lugs 2 and a pull rod connection lug 3, the head of the cable connection lug 2 is provided with a cable hole 4, and the head of the pull rod connection lug 3 is provided with a pull rod Hole 5, the angle between the two cable connection lugs 2 is a right angle, the angle between the pull rod connection lug 3 and any cable connection lug 2 is 135 degrees, the said The cable connecting lug plate 2 and the strut connecting piece 1 are distributed at right angles, the pull rod connecting lug plate 3 and the strut connecting piece 1 are distributed upwardly inclined, and the inclination angle of the pull rod connecting lug plate 3 is 40 degrees ~50 degrees. ...

Embodiment 2

[0040] Embodiment 2: The prestress tensioning method of the lower chord node fastening device of the cylindrical chord structure is carried out according to the following steps:

[0041] (1) Assembly of the lower chord node of the cylindrical chord support structure, the prestressed cable and the tie rod:

[0042] Weld the strut connecting piece 1 to the lower end of the strut with equal strength; then install the prestressed cable on the cable connecting lug plate; then install the prestressed pull rod on the pull rod connecting lug plate; and so on to complete other nodes and cables installation;

[0043] (4), prestressed tension: after step (1), pre-tighten the steel cable:

[0044] In the first stage, the umbrella-shaped unit is first stretched, and four basically symmetrical units are selected for each batch, each unit has 20 strut connectors, and a total of 32 cable tie rods are stretched at the same time; The initial prestressing degree of tension is controlled to be ...

Embodiment 3

[0047] The prestress tensioning method of the lower chord node fastening device of the cylindrical chord structure is carried out according to the following steps:

[0048] (1) Assembly of the lower chord node of the cylindrical chord support structure, the prestressed cable and the tie rod:

[0049] Weld the strut connecting piece 1 to the lower end of the strut with equal strength; then install the prestressed cable on the cable connecting lug plate; then install the prestressed pull rod on the pull rod connecting lug plate; and so on to complete other nodes and cables installation;

[0050] (5), prestressed tension: after step (1), pre-tighten the steel cable:

[0051] In the first stage, the umbrella-shaped unit is first stretched, and four basically symmetrical units are selected for each batch, each unit has 20 strut connectors, and a total of 32 cable tie rods are stretched at the same time; The initial prestressing degree of tension is controlled to be 0.15;

[0052] ...

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Abstract

The invention relates to a fastening device, in particular to a bottom chord node fastening device of a cylindrical surface suspended structure and a prestress tensioning method thereof. The bottom chord node fastening device comprises a supporting bar connecting member, wherein the side wall of the supporting bar connecting member is provided with two guy cable connecting ear plates and a pull bar connecting ear plate, the head of each guy cable connecting ear plate is provided with a guy cable hole, and the head of the pull bar connecting ear plate is provided with a pull bar hole. Prestress construction of a reticulated shell structure of the whole cylindrical surface suspended structure is completed through assembling a bottom chord node of the cylindrical surface suspended structure, the prestress guy cable and the pull rod and tensioning with prestress. The bottom chord node fastening device of the cylindrical surface suspended structure has the advantages of reasonable structure, high construction precision, low construction cost and safe structure use.

Description

technical field [0001] The patent of the present invention relates to a fastening device, in particular to a lower chord node fastening device of a cylindrical chord structure and a prestress tensioning method thereof. Background technique [0002] The current chord-branched reticulated shell structure is a new hybrid prestressed large-span spatial structure system that combines a rigid single-layer reticulated shell and a flexible cable-rod system. development trend. On the one hand, it improves the overall stability of the upper single-layer reticulated shell structure, so that the structure can span a larger space; Compared with other fully flexible structures, it has been greatly simplified. In addition, the effects of the two structural systems on the supports cancel each other out, making the structure a self-balancing system. While giving full play to the mechanical advantage of the single-layer reticulated shell structure, it can make full use of the high-strength ...

Claims

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Application Information

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IPC IPC(8): E04B1/58E04C5/12E04G21/12
Inventor 周观根何挺陈科洪王东普秋菊虞崇钢刘扬周烽夏伟平
Owner 浙江东南网架股份有限公司