WO2003025304A9

WO2003025304A9 - Spiral ties for reinforced columns

Info

Publication number: WO2003025304A9
Application number: PCT/AU2002/001022
Authority: WO
Inventors: Alexee A Gulikov
Original assignee: Alexee A Gulikov
Priority date: 2001-09-19
Filing date: 2002-08-02
Publication date: 2004-04-29
Also published as: CN1575366A; JP2005533202A; EP1427899A1; AUPR772201A0; US20040237449A1; EP1427899A4; WO2003025304A1; CA2460816A1

Abstract

A SpiralNet device is disclosed. The device is consisted by its number of spiraled bends according to request geometric shape of a concrete column, where Figure 1 shows a SpiralNet for a rectangular shape frame of a concrete column. The spiraled bends are starting from point 1 to point 2 with 135 degree, and continuously followed by 90 degree spiraled bends from point 2 to point 3 along a side of a concrete column, and from point 3 to point 4 along an adjacent side of the same column, and from point 4 to point 5 the next adjacent side of the same column, and from point 5 to point 6 the continuous adjacent side of the same column, and then finished with the last 135 degree spiraled bend from point 6 to point 7. The measurement of bends are according to any section view which is perpendicular to all edges. The device can be used to construct any shape of concrete column by assembling SpiralNet in a unique order.

Description

SpiralNet

The invention is described in the following statement

This invention, aτeinforcing wire, is designed to optimize reinforcement within a concrete column structure to be utilized in the construction industry as a reinforcement product.

For many years the construction industry has placed the reinforcing wires 5 perpendicularly to link the adjacent reinforcing bar to reinforce concrete columns. Around the time of the last decade, an improvement was made for cylindrical reinforced concrete columns by replacing the single reinforcing wire with a spiral shape wire. As a result, a significant improvement was made in reinforcement products with this new structure. However, all polygon 10 shaped concrete columns, such as rectangular, pentagonal, hexagonal, etc. have still not been changed significantly.

This problem is overcome by the present invention, which provides a spirale shaped wire for steel bar reinforcement inside a concrete column instead of pe endicularly joined wires made of the same material. The invention 15 comprises a series of shapes of rectangular, variable rectangular, hexagonal, variable hexagonal, pentagonal, variable pentagonal, quadrangular and cylindrical for reinforcement of concrete columns. Despite the number of steel bars within a column, the invention provides reinforcement through a number of different shaped spiral structures to complement the respective design of each column. Similarly, by changing the shape of the reinforcement wire the invention can match any numbers of steel bars.

The SpiralNet may be made of steel or material similar to steel or even plastic. For assistance with understanding the invention, references are provided to the accompanying drawings that show examples of the invention.

In the drawings:

Figure 1 shows an example of how a single SpiralNet relates to quadrangular shaped concrete columns with 4 steel bars; Figure 11 shows a top view of the circulation of figure 1 in application;

Figure 2 shows an example of how the SpiralNet is placed into a quadrangular shaped concrete column with 4 steel bars;

Figure 21 shows an engineering-style drawing, using letters instead of numbers for better description. Figure 1, from a manufacturing position, the numbers from 1 to 7 represent one circulation of bends to form the SpiralNet, and the A, B, C, and D represent 4 positions of parallel placed steel bars in a concrete column. Figure 1.1 shows a single layout from a construction position. The length from points 1 to 2 in Figure 1 represents the length "Ts" in Figure 21, which aims to provide enough length for tooling access during the bending operations and maintain 135 degree bend from the adjacent side to achieve better strength. The position of point number 2 represents the first side bend of the SpiralNet, and the position of the point number 3 represents the second side bend continuously from the first bend, and the point number 4 represents the third side bend continuously from the second bend, and the point number 5 represents the fourth side bend continuously from the third bend, and the point number 6 represents the last bend continuously from the fourth bend in one spiral. The length in point 6 to 7 in Figure 1 represents the length "Te" in Figure 21, which has the same function as the length in points 1 to 2. Both lengths in points 1 to 2 and points 6 to 7 provide the function for better positioning when assembling the SpiralNet for a complete spiraled wire net as shown in Figure 21. The lengths in points 2 to 3 and points 4 to 5 represent the length "Sw" in Figure 21, and the lengths in points 3 to 4 and points 5 to 6 represent the lengths "Sh" in Figure 21.

Figure 2 shows how four components of the SpiralNet are assembled together in order to form a spiraled wire net for a portion of a 4 bar concrete column and Figure 2, 1 shows an assembled SpiralNet in standing position as an example. The horizontal layout shows a manufacturing position and the vertical layout shows a construction position. In Figure 2, all meanings of the letters described are as following:

L the total length of a fully assembled spiraled wire net;

W width of the assembled spiraled wire net, represents "W" in Figure 21 ;

H height of the assembled spiraled wire net represents "H" in Figure 21;

P pitch of each start point in repeating SpiralNet position in assembly;

G gap in between the end point of a SpiralNet to the next start point of a SpiralNet; G = P - Pb

In corresponding to Figure 1, the "W" represents the distance of line AB & line CD; the H represents the distance of line AD & line BC. Figure 21 shows an engineering style drawing to indicate how all factors relate to each other in this invention. The determination of all factors is given below:

W centre distance of each side of wire after bending, represents the width of the SpiralNet. It can be selected according to the current standard width of concrete columns; H centre distance between the top to bottom wire after bending, represents the height of the SpiralNet. It can be selected in the same way as the width; Pb pitch of the SpiralNet from the first bend to last bend on the same bar.

It can be worked out by: Pb = 2*(sin Q + cos Q) Ts tooling access at start point for bending operation, it can be found by Ts = Tooling access length + R

Te tooling access at end point for bending operation, it can be found by Te = Tooling access length + R R radius of bend is determined by tooling, which is a range of less than the radius of the steel bar; Sh Sh = H/cos Q determines side length of the height Sw S w = W/cos Q determines side length of the width Q raising angle can be worked out by the formula provided below when the column has equal sides

Q = Tan^_1 (Ps/Ns*W)

Ps is the standard pitch on the existing column according to Australian standards; Ns represents the number of sides in one concrete column, in this example showing as 4 sides and 4 steel bars, where = H. In the determination method in the situation of an unequal sides section view of a column, the longer side is used in the above formula as H. However Figure 4 also shows an unequal side SpiralNet layout, in a case of W < H. In this case H will replace the W in the above equation to work out angle Q. The W remains the same when W = H in the same equation above. For example, Figure 4 shows the SpiralNet double layout in rectangular shape with 6 steel bars, H will replace W in use of the above-mentioned equation to work out angle Q.

In quadrangular shaped columns the SpiralNet has many different layouts as generally shown in Figure 11 via top views: the single layout shown in drawing 01 , drawing 02, drawing 05, and drawing 06 are associated to

Figure 2.1; the double layout shown in drawing 03 of Figure 11 is associated to Figure 2.2 or Figure 2.3; the multi layout shown in drawing 04, drawing 07, drawing 08 of Figure 11 and drawing 09, drawing 10, drawing 11 of Figure 12 is associated to Figure 3, Figure 4, Figure 5, Figure 6, Figure 7, Figure 8, Figure 9 and Figure 10. The double layout in use only when the numbers of steel bars are no less than 6, in Figure 4 shows 6 steel bars layout and 8 steel bars layout.

The double layout aims to make the whole reinforcing wire net stronger. Figure 2.3 shows from manufacturing position the dimensional variation of 6 steel bars in between single layout and double layout, which is the height of the SpiralNet. The "Hd" represents the height of the whole column, and the "H" represents the height of SpiralNet. In this case, the "H" is always smaller than the "W". Figure 2.3 also shows how a portion of SpiralNet is assembled from manufacturing position of a 6 steel bars column.

To assemble a multi layout SpiralNet column, the detail is shown on Figure 20. In drawing 17 on the bottom of the column is shown the first assembled level of SpiralNet. The top shows the first SpiralNet component of second level of the assembly. The SpiralNet goes through bar 4, bar 1 and bar 2, stopping for the second SpiralNet component of the second level to slide in. Drawing 18 shows the second SpiralNet component of the second level as it goes through bar 4, bar 3, and bar 5, stopping for the third SpiralNet component of the same level to slide in. Drawing 19 shows the third SpiralNet component as it goes through bar5, bar 6 and bar8, stopping for the fourth SpiralNet component to slide in, and the first SpiralNet component on the same level goes through all bars including bar 3. Drawing 20 shows the fourth SpiralNet component going through bar 8, bar 7, bar 9 and bar 10, so far the second SpiralNet component will go through bar 6, the third SpiralNet component will go through bar 7, and all SpiralNet component on the second level will go through all bars from 1 to 10 as presented in the drawing. The whole level SpiralNet will be adjacent to the first level at bottom of the column. The assembly process shall continue until the whole length of column is full. This method can be used to assemble any special shape column shown in Figure 11 and Figure 12. Similarly, drawing 12, drawing 13 of Figure 19 associated with Figure 13 shows a circular shape SpiralNet and Figure 14 shows its assembly in the column; drawing 14 of Figure 19 associated with Figure 15 shows a pentagon SpiralNet and Figure 16 shows its assembly in the column; drawing 15 of Figure 19 associated with Figure 17 shows a hexagon shape SpiralNet and

Figure 18 shows its assembly in a pentagon shaped column; drawing 16 in Figure 19 shows as 8 bar polygon shaped layout which indicates any multi- side polygon shaped SpiralNet with the same method.

By the use of a number of the SpiralNet the concrete column can be assembled in full length in any of the above-mentioned cases.

Claims

The claims defining the invention are as follows:

1. A SpiralNet comprising a leading bend (Ts) of 135 degrees and followed with associated bends according to the geometrical shape of each individual concrete column in spiral forms, finished with an ending bend (Te) of 135 degrees as a complete circulation.

2. SpiralNet according to claim 1, comprises "s" bends where "s" is an integer equal to 3 or greater, identically repeating its bends to form each individual component in assisting cage assembly with "s" sides shapes.

3. SpiralNet according to claims 1 and 2, shows the increase angle "Q" is determined by the side "^"Sh" or "Sw" and the number of side "s".

4. SpiralNet according to claim 1, 2, and 3, shows the spiraled form is not just to keep a geometrical shape for each individual column, but also to provide support to share the load from the main reinforcement rods.

5. SpiralNet according to claim 1, 2, 3, and 4 shows whereby that by increasing current diameter of stirrup in any measurement up to and equal or greater than the main reinforcement rods, this will result in taking off part of the load from the main reinforcement rods.

6. SpiralNet according to claims 1 to 5, shows whereby taking the load from the main reinforcement rods this will increase the strength of a column without increasing the size of the column itself.

7. SpiralNet according to claims 1 to 6, shows that it may be made from any metal or even plastic material.

8. SpiralNet according to the above preceding claims, provides a unique assembly result to form spiraled cages in any shape and length.

9. SpiralNet according to claims 1 to 8, shows that any spiraled cage can be prefabricated or assembled on site.

10. SpiralNet is substantially described herein accordance to accompanying drawings.

Alexee Anatolievich Gulikov