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Suspended-dome multi-time prestressed construction method

A suspend dome and construction method technology, applied to roofs, building components, buildings, etc., can solve the problems of inconvenient selection of components, uneven distribution, waste of materials, etc.

Inactive Publication Date: 2008-04-09
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] (2) The internal force of the single-layer reticulated shell on the upper layer of the suspensive dome is passively generated by the lower layer of steel cables and external loads, and cannot self-adjust the internal force, so that most of the hoop members of the upper single-layer reticulated shell are passively compressed and cannot be self-adjusted to reduce Pressure; most of the radial rods of the upper single-layer reticulated shell are passively compressed, and the pressure varies in size and unevenly distributed, which causes inconvenience to component selection and wastes materials

Method used

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  • Suspended-dome multi-time prestressed construction method
  • Suspended-dome multi-time prestressed construction method
  • Suspended-dome multi-time prestressed construction method

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Experimental program
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Effect test

Embodiment 1

[0028] As shown in Fig. 1, Fig. 2, Fig. 4, Fig. 6 and Fig. 7, the construction molding process of this embodiment is as follows: the first step is to install the upper central pressure ring 1, the upper radial rod 2, and the edge member 7 to form a The structure of the upper reticulated shell is shown in Figure 7. The specific installation method is: first install the edge member 7, and then install the upward radial rod 2 in the order from inside to inside, one end of the upper radial rod 2 on the outermost ring is connected to the edge member 7, and the other end is connected to other upper diameter rods The radial rods 2 are connected end to end, one end of the innermost upper radial rod 2 is connected end to end with other upper radial rods 2 , and the other end is connected with the central pressure ring 1 . It is also possible to install these components in the reverse order, or follow the construction sequence from the inside to the middle at the same time.

[0029] Th...

Embodiment 2

[0035] As shown in Figure 3, Figure 5, Figure 6, and Figure 8, the construction method of this embodiment is the same as that of Embodiment 1, and the only difference is that the upper central pressure ring 1, the upper radial rod 2, and the upper circumferential rod 3 The shape of the grid profile shown in Figure 3 formed with the edge member 7 is elliptical; the support system formed by the strut 4, the lower radial cable 5, and the lower circular cable 6 is selected as an elliptical shape as shown in Figure 5 .

Embodiment 3

[0037] The structure of this embodiment is the same as that of Embodiment 1, the only difference is that the outline shape of the mesh composed of the upper central pressure ring 1, upper radial rod 2, upper circumferential rod 3 and edge member 7 is polygonal.

[0038] The multi-prestressed suspensed dome structure formed by this construction method not only retains the advantages of the traditional suspensed dome structure, but also has its own unique advantages: it reduces the pressure on the upper circumferential member and even converts it into tension, reducing the It reduces its material consumption, improves the stability of components, the local stability of reticulated shells, and the overall stability of the entire structure; it makes the internal force distribution of the upper radial rods more uniform, which is conducive to the unification of component forms, and facilitates design and construction. Since the upper hoop members are not installed when the prestress ...

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Abstract

The invention discloses a suspend dome structure multi-prestressed construction method used in construction field. The construction method is that: firstly, a central pressure ring, an upper radial bar and edge elements are arranged on an upper layer; secondly, a lower radial rope, a lower ring rope and a strut are arranged on a lower layer; thirdly, prestress is applied in the structure by stretching the lower ring rope or stretching the lower radial rope or adjusting the length of the strut; fourthly, a ring bar is arranged; fifthly, an external load is applied on the structure. Compared with the structure formed by a traditional method, the suspend dome structure formed by the invention reduces peak pressure of elements with concise force, even changes a part of elements from a pressure bar to a tension bar, avoids instability of elements, at the same time enhances the entire stability of the whole structure and enlarges the ultimate bearing capacity. Furthermore, the invention leads a more even distribution of internal force of the upper layer network shell bar elements, is helpful to the unity of the elements and convenient for design and construction, at the same time, the invention reduces the applied prestress value and reduces construction difficulty.

Description

technical field [0001] The invention relates to a construction method of a suspension dome structure applied in the construction field, in particular to a multiple prestressed construction method of a suspension dome. Background technique [0002] In recent years, with the development of prestressed steel structures, a large number of new structural systems have emerged, such as suspend dome structures. Suspension dome is a new structure formed by combining cable dome and single-layer reticulated shell, that is, the upper flexible cables of the cable dome are replaced by single-layer reticulated shell, which increases the roof stiffness and reduces construction difficulty. At present, the traditional construction method is to install the upper reticulated shell first, and then stretch the hoop cables in a certain order after the upper reticulated shell is completely installed. However, the suspension dome formed by the traditional method has the following disadvantages: [...

Claims

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Application Information

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IPC IPC(8): E04B7/08
Inventor 刘学春张爱林张传成
Owner BEIJING UNIV OF TECH
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