CN201221131Y - Connecting structure for suspended-dome structure - Google Patents

Abstract

The utility model discloses a connecting structure used in a suspended-dome structure. An upper suspended monolayer spherical latticed shell, an oblique cord and ring cords are connected through a vertical pressure lever to form the suspended-dome structure. The oblique cord, the ring cords and the vertical pressure lever are connected through a hollow welded ball joint. Three holes are opened on the welded ball joint along the horizontal ring cord direction, wherein, two holes lead one ring cord to pass through the welded ball joint and to be anchor-connected through a casting anchor, and a connecting cord joint is anchored on a gasket and a screw cap inside the welded ball joint in another hole and is connected with the other ring cord through a screw shell; and another hole is opened on the welded ball joint along the oblique cord direction, and another connecting cord joint is anchored on the gasket and the screw cap inside the welded ball joint and is connected with the oblique cord through the screw shell. By adopting the connecting structure, the construction of the suspended-dome structure is very convenient, the cord tension force can be adjusted repeatedly, and the disadvantage that the cord tension force is hard to accord with the theoretical value in the existing suspended-dome structure engineering can be overcome.

Description

Connecting structures for suspendome structures

technical field

The utility model relates to the construction field, in particular to a connection structure for a suspend dome structure.

Background technique

Suspension dome structure is a new structural form proposed by Japanese scholar M Kawaguchi in 1993. It combines the advantages of single-layer reticulated shell and cable dome structure, and has good mechanical properties. The suspensive dome structure is a self-balancing structural system based on improving the stability of the single-layer spherical reticulated shell and reducing the dependence on external components. On the one hand, it improves the stability of the single-layer reticulated shell structure and enables the structure to span larger space; on the other hand, the new structural system is a self-balancing system, which does not need to be shaped by external components, reducing the dependence on external components.

But it also has the following problems:

1) In the structure, the vertical struts, oblique cables and ring cables intersect at one point, and the design of this node has not yet formed a mature theoretical system.

2) Although a variety of prestressing construction methods have been proposed for suspensed dome structures, there are few practical engineering applications, and there are still excessive prestress losses, large deviations between the measured and designed values of prestress, and adjustments cannot be made.

3) Due to the limitation of the current design nodes, it is very difficult to adjust the applied prestress, which makes it unnecessary to consider this problem in the design of the actual suspension dome structure, thus increasing the steel index, and some suspension domes Structural cables become decoration.

Contents of the invention

The purpose of the utility model is to overcome the deficiencies of the prior art and provide a connection structure for a suspension dome structure.

The connection structure used for the suspension dome structure includes upper chord reticulated shell members, upper chord reticulated shell nodes, vertical compression rods, welded hollow ball joints, oblique cables, ring cables, first pin bolt connection joints, first threaded sleeves, second A nut and a backing plate, a first cable head, a second nut and a backing plate, a support pipe, a second pin connection joint, a third pin connection joint, a second threaded sleeve, a second cable head, a third Nuts and backing plates; rods and upper chord reticulated shell nodes form the reticulated shell structure part of the suspensive dome structure. The oblique cables, ring cables and vertical compression rods are connected through welded hollow ball nodes; the welded ball nodes are opened in the direction of the horizontal ring cables. Three holes, two of which are used to pass a hoop cable through the welded ball joint and anchored through the first nut and the backing plate, and the other hole of the welded ball joint is used for the second nut and the backing plate to connect the first cable The first cable head is connected with the ring cable through the first threaded sleeve; the welded ball node has a fourth hole in the direction of the oblique cable, which is used for the third nut and backing plate to connect with the second cable head, and the second The cable head is connected with the oblique cable through the second threaded sleeve; the upper end of the oblique cable is connected with the upper chord node of the reticulated shell through the first pin bolt connection joint which can freely rotate along the spherical radial direction of the reticulated shell; the lower end of the vertical pressure rod is connected with the welded hollow ball The nodes are connected through the second pin joint that can freely rotate along the normal direction of the reticulated shell, and the connection between the upper end of the vertical strut and the node of the upper chord reticulated shell is connected by the third pin joint that can rotate along the radial direction of the reticulated shell.

The welded hollow ball joint is formed by welding two hemispheres. Before welding, one end of the first cable head is connected to the second nut and the backing plate, and placed in the ball, and the other end is connected with a threaded sleeve. One end of the two cable heads is connected to the third nut and the backing plate, and placed in the ball, and the other end is connected with a threaded sleeve. The anchorage end of the hoop passing through the welded hollow ball node first passes through the support tube, one end of the support tube is welded on the welded hollow ball node, and the other end of the support tube is welded on the first nut and the backing plate of the backing plate.

The beneficial effect that the utility model has compared with background technology is:

1) In the utility model, it is the welded hollow ball joint that connects the oblique cable, the ring cable and the vertical pressure bar, and the welded hollow ball joint has the advantages of easy processing and easy installation;

2) In the utility model, the connection between the cable, the rod and the node is connected by a threaded sleeve or a pin bolt, which is convenient for construction site installation and does not require construction site welding, and the threaded sleeve can eliminate the processing error of the cable;

3) A variety of schemes can be used for prestressing construction. For example, on the same ring cable, each ring cable can be stretched at the same time, or it can be stretched step by step. The use of this connection structure also makes the overall installation of the suspension dome structure simple, and the prestress can be adjusted multiple times, so that the measured value of the prestress can be easily consistent with the design value;

4) After adopting this connection structure, the lower string ring cable is divided into several sections, and the section installation is convenient to control the installation accuracy and ensure the construction quality;

5) The connection between the vertical pressure rod and the upper and lower end nodes adopts a pin connection that can only rotate freely in a certain direction, which ensures the necessary rotation required for installation and actual work.

Description of drawings

Fig. 1 is the overall view of the upper chord, compression rod, inclined cable and ring cable of the suspensed dome structure;

Fig. 2 is a connection diagram of the welded hollow ball node and the vertical strut, oblique cable and ring cable;

Figure 3 is a top view of the connection between the welded hollow ball node and the hoop;

Fig. 4 is the detailed diagram of connection between ring cable and connecting hollow ball node;

In the figure: upper chord reticulated shell member 1, upper chord reticulated shell node 2, vertical pressure bar 3, welded hollow ball joint 4, oblique cable 5, ring cable 6, first pin bolt connection joint 7, first threaded sleeve 8, First nut and backing plate 9, first cable head 10, second nut and backing plate 11, support pipe 12, second pin connection joint 13, third pin connection joint 14, second threaded sleeve 15 , The second cable head 16, the third nut and the backing plate 17.

Detailed ways

The connection structure for the suspendome structure includes upper chord reticulated shell rods 1, upper chord reticulated shell nodes 2, vertical compression bars 3, welded hollow spherical nodes 4, oblique cables 5, ring cables 6, first pin bolt connection joints 7, First threaded sleeve 8, first nut and backing plate 9, first cable head 10, second nut and backing plate 11, support pipe 12, second pin connection joint 13, third pin connection joint 14 , the second threaded sleeve 15, the second cable head 16, the third nut and the backing plate 17; the rod 1 and the node 2 form the reticulated shell structure part of the suspensive dome structure, the oblique cable 5, the ring cable 6 and the vertical pressure Rods 3 are connected by welded hollow ball joints 4; welded ball joints 4 have three holes in the direction of the horizontal hoops, two of which allow a hoop 6 to pass through the welded ball joints 4 and pass through the first nut and backing plate 9 Anchoring, the other hole of the welding ball node 4 is used for the second nut and backing plate 11 to connect the first cable head 10, and the first cable head 10 is connected with the ring cable 6 through the first threaded sleeve 8; the welding ball The node 4 has a fourth hole in the direction of the oblique cable, which is used to connect the third nut and backing plate 17 to the second cable head 16, and the second cable head 16 is connected to the oblique cable 5 through the second threaded sleeve 15; The upper end of the oblique cable 5 is connected with the upper chord node 2 of the reticulated shell through the first pin bolt connecting joint 7 which can freely rotate along the radial direction of the spherical surface of the reticulated shell; The rotating second pin connection joint 13 is connected, and the connection between the upper end of the vertical pressure bar 3 and the node 2 of the upper chord reticulated shell is connected by the third pin connection joint 14 which is rotatable along the radial direction of the reticulated shell.

The welded hollow ball joint 4 is welded by two hemispheres. Before welding, one end of the first cable head 10 is connected to the second nut and backing plate 11, and placed in the ball, and the other end is connected with a threaded sleeve 8. Connect one end of the second cable head 16 to the third nut and the backing plate 17, and place it in the ball, and the other end is connected to the threaded sleeve 15. The anchorage end of the hoop 6 passing through the welded hollow ball joint 4 first passes through the support tube 12, one end of the support tube 12 is welded on the welded hollow ball joint 4, and the other end of the support tube 12 is welded to the pad of the first nut and the backing plate 9 board.

The steel used in the utility model, the processing of rods, the manufacture of cable-casting anchor joints, the processing of welded hollow ball joints, the processing of nuts, and the production of high-strength steel wire ropes are all mature. Connect one end of the cable head to the nut and the backing plate, and place it in the ball. At this time, when welding the hollow spherical joint, the cable head, nut and backing plate should be well protected. At the same time, the current tensioning equipment and system are also sufficient to meet the requirements of the utility model. There are multiple tensioning equipment and synchronous tensioning control technology at the same time, and the tensioning of the cable in the utility model can be repeated many times. The fact that the measured value is consistent with the design value provides great convenience.

Claims (3)

1. syndeton that is used for suspended-dome structure, it is characterized in that: it comprises the net shell rod member (1) that winds up, the net shell node that winds up (2), perpendicular depression bar (3), welded hollow spherical joints (4), oblique cord (5), strop (6), the first pin jointing (7), first screw shell (8), first nut and backing plate (9), the first rope head (10), second nut and backing plate (11), support column (12), the second pin jointing (13), the 3rd pin jointing (14), second screw shell (15), the second rope head (16), the 3rd nut and backing plate (17); Rod member (1), node (2) are formed the latticed shell structure part of suspended-dome structure, and oblique cord (5), strop (6) and perpendicular depression bar (3) are connected by welded hollow spherical joints (4); Welded spherical node (4) is opened three holes in horizontal strop direction, wherein two holes are to make a strop (6) pass welded spherical node (4) also to be anchored by first nut and backing plate (9), another hole of welded spherical node (4) is used for second nut and backing plate (11) connects the first rope head (10), and the first rope head (10) is connected by first screw shell (8) with strop (6); Welded spherical node (4) has the 4th hole in the oblique cord direction, is used for the 3rd nut and backing plate (17) and is connected with the second rope head (16), and the second rope head (16) is connected by second screw shell (15) with oblique cord (5); Node (2) is winded up by being connected along the net shell sphere first pin jointing (7) radially free to rotate with the net shell in oblique cord (5) upper end; Perpendicular depression bar (3) lower end and welded hollow spherical joints (4) be by being connected along the second pin jointing (13) that net shell normal direction freely is rotated, and is connected along radially rotating the 3rd pin jointing (14) of net shell with the employing that is connected of the net shell node that winds up (2) on erecting depression bar (3).

2. the syndeton of a kind of suspended-dome structure according to claim 1, it is characterized in that: described welded hollow spherical joints (4) is welded by two hemispheres, before welding, the first rope head (10) one ends are connected in second nut and backing plate (11), and place in the ball, the other end is connected with screw shell (8), and the second rope head (16) one ends are connected in the 3rd nut and backing plate (17), and place in the ball, the other end is connected with screw shell (15).

3. the syndeton of a kind of suspended-dome structure according to claim 1, it is characterized in that: described strop (6) anchored end of passing welded hollow spherical joints (4) is passed support column (12) earlier, support column (12) one ends are welded on the welded hollow spherical joints (4), and support column (12) other end is welded on the backing plate of first nut and backing plate (9).

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