JPS60164529A - Connection unit of steel pipe pillar and beam - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] The present invention relates to a joint unit of a steel pipe column and a beam.

As is well known, when constructing a steel structure by joining steel pipe columns and beams, a large bending moment acts on the joint (joint part) between the column and the beam, so local bending of the pipe wall may occur. There is a risk that the deformation becomes excessive and the column collapses before the strength of the column or joint is reached, and various joint units have been proposed to prevent this. As a technique for constructing such a joint unit, the technique described in Japanese Patent Publication No. 55-48149 is known. This conventional joint unit □ is designed so that "at the joint between a column and a beam, the wall thickness of the column at this joint is thicker on the inside of the column than the wall thickness of the column other than this joint. In addition, a partition plate was formed on the inside of the column at the part of the column that corresponded to the flange part of the beam.

However, since this conventional type has a blind partition plate, it cannot be used when it is desired to fill the joint unit with concrete to increase the rigidity of the column.

The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a joint unit between a steel pipe column and a beam that can be filled with concrete. Therefore, its distinctive feature is its outer diameter.

In a joint unit in which a cylindrical body with the same outer diameter is concentrically joined to the upper end of a steel pipe column with a wall thickness of T, and a beam is joined to the outer peripheral surface of the cylindrical body, a plurality of stiffener rings protrude on the inner surface of the cylindrical body. and the inner diameter of the ring is d.

If the outer distance between adjacent stiffener rings is L, and the thickness of the cylinder body between stiffener rings is t, then D -2t>d≧i,
The relationship is 20≧H≧p and t>T.

Hereinafter, embodiments of the present invention will be described in detail based on the drawings.

In Figures 1 and 2, 1 is a steel pipe column with a circular cross section;
A cylindrical body 2 is concentrically joined to the upper end of the column 1 by welding, and a beam 3 made of H-shaped steel is joined to the outer peripheral surface of the cylindrical body 2 to form a steel pipe column and beam joint unit 4. . A steel pipe column 5 is further connected to the upper end of the cylinder 2, but in the case of the top floor,
This upper column 5 is not joined.

Stiffener (reinforcement) rings 6.6 are provided protruding from the inner surface of the upper and lower ends of the cylinder 2.

Here, the dimensions of each part shown in FIG. 1 are defined as follows.

b; Outer diameter d of the lower steel pipe column l and cylindrical body 2; Inner diameter 11 of the stiffener ring 6; External distance h of the upper and lower stiffener rings 6.6
; Height T of the beam 3 ; Thickness t of the lower steel pipe column 1 ; Thickness of the cylinder 2 between the metal rings 6 The dimensions of the above-mentioned parts are set in the following relationship.

D'-2t>d≧F , −, −−−−−−−−−−−
−−−−■2D≧H≧D −−−−−−−−−−−−
--■t >T ----------------------■ That is, the above formula 0 specifies the inner diameter dimension d of the stiffener ring 6. If the inner diameter dimension d is less than % of the outer diameter dimension, it becomes difficult to fill with concrete, so d≧Treasure is set. Further, D −2t>d means that the ring protrudes inward, and means that the stiffener ring 6 portion is thickest and strong in terms of strength.

The equation (2) means that the beam 3 can be joined between the metifuna rings 6 and 6. That is, beam 3
Since the height h of is normally set to 20〉h〉0, if upper and lower stiffener rings 6.6 are provided in the relationship of the above formula (■), then
This allows the upper and lower flanges 7.7 of the beam 3 to approximately correspond to the position of the stiffener ring 6.6.

In addition, type (2) is designed so that the wall portion of the cylinder body can withstand the shearing force acting on the cylinder body 2.

The stiffener ring 6 and the inner surface of the cylindrical body 2 are connected by a smooth curved portion R, and have a shape that facilitates filling with concrete and transmitting stress from the beam to the filled concrete.

As shown in FIG. 3, the joint unit 4 is manufactured by manufacturing a cylindrical piece 2a including one stiffener ring 6 by vertical centrifugal casting, a joint method, or forging, and stacking two pieces 2a. It is manufactured by aligning them together and joining their contact surfaces by welding. Further, as shown in FIG. 4, it is also possible to interpose a cylindrical body piece 2b not including a stiffener ring between the cylindrical body pieces 2a, 2a including the stiffener 1 and the nongang 6, and to manufacture three pieces stacked one on top of the other. With the manufacturing method shown in FIG. 5, the interval H between the metal rings 6.6 can be set arbitrarily.

According to the embodiment of the present invention, the stiffener ring 6.6 is provided on the inner surface of the joint unit 4, and the beam 3 is joined between the rings 6.6, so that the strength of the joint unit 4 can be reinforced. It will be planned. Moreover, the stiffener ring 6 has an inner diameter d.
Since the holes are provided, concrete filling becomes possible and the rigidity of the joint unit 4 is increased.

What is shown in FIGS. 5 to 1O are other embodiments of the present invention, and what is shown in FIG. 5 is a beam 3.
An example is shown in which 3′ is joined, and even in such a case 2D≧1
If the stiffener ring 6.6 is provided in the range of 1≧D, the flange 7 of the same beam 3.3' will be free from the stiffener ring 6.
．． It can be joined corresponding to position 6.

What is shown in FIGS. 6 and 7 shows the shape of the joint unit 4 when the outer diameters of the lower steel pipe column l and the upper steel pipe column 5 are different through the joint unit 4.

The one shown in FIG. 8 shows a case where three stiffener rings 6, 6, 6 are provided, and is used when joining beams 3 in a stepped manner.

The one shown in Fig. 9 is a supplementary method that does not require a stiffener ring in the middle, and the thickness t of the cylinder 2 between the stiffener rings 6 and 6 is expanded in a tapered shape to increase the thickness at the center. It is something.

Moreover, what is shown in FIG. 10 is one in which the joint unit 4 is used as a point of a truss structure.

As detailed above, according to the present invention, since the stiffener is located at the joint portion of the beam, stress acting on the joint unit is dispersed and destruction due to stress concentration is prevented. Furthermore, since the stiffener ring is provided with holes, it is possible to fill it with concrete, thereby increasing the rigidity of the joint unit.

[Brief explanation of drawings]

Fig. 1 is a partially sectional front view showing an embodiment of the present invention, Fig. 2 is a plan view thereof, and Figs. 3 to 1O are partially sectional front views showing other embodiments of the present invention. be. 1-Steel pipe column, 2-cylindrical body, 3-beam, 4-junction unit, 6-stiffener ring. Figure 6 Figure 177 Figure 91 Figure 10

Claims (1)

[Claims] 1. A joint unit in which a cylindrical body with the same outer diameter is concentrically joined to the upper end of a steel pipe column with an outer diameter and wall thickness T, and a beam is joined to the outer peripheral surface of the cylindrical body. , a plurality of stiffener rings are provided protruding from the inner surface of the cylinder, the inner diameter of the rings is d, the outer distance between adjacent stiffener rings is ■, and the thickness of the cylinder between the stiffener rings is t, then D -2t A joint unit of a steel pipe column and a beam, characterized in that the following relationships exist: >d≧T, 2D≧H≧D, and t>T.