JP3099017B2 - Joint method and joint structure of steel beam - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joint method and a joint structure for attaching a steel beam used in a building such as a steel structure or a reinforced steel structure to a steel column.

[0002]

2. Description of the Related Art Conventionally, to connect a steel beam and a steel column,
As shown in FIG. 3, a large number of bolt holes 26 are formed in the end of the connecting arm 22 of the steel column 21 and the flange 24 and the web 25 of the beam 23 to be attached thereto, and the upper part of the flange 24 at the joint is formed when the steel frame is constructed. The attachment plate 27 is applied to the lower surface and both side surfaces of the web 25 and tightened with a number of high-strength bolts 28.

[0003]

Since a large number of holes for bolts are previously formed in the end of the conventional steel beam, processing for the bolt is required and it is troublesome. It is necessary to perform two-stage primary and secondary tightening, and the number of high-strength bolts is large, so it takes a long time to perform the work. In the case of rainy weather, high-strength bolts cannot be tightened.
There was an unfavorable disadvantage in shortening the construction period.

[0004] It is an object of the present invention to solve these drawbacks and to obtain a joint method and a joint structure capable of performing a joining operation of a steel beam in an extremely simple operation in a short time.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a connecting arm made of an H-shaped steel and a dovetail projecting from each of upper and lower flanges of a large beam made of an H-shaped steel to be connected thereto. A steel plate beam joint method in which a dovetail plate each having a dovetail groove is slid into the tenon from the lateral direction and then a fixing plate fixed to the web is bolted, and a connecting arm made of H-section steel and an H-shaped section A steel beam joint in which a dovetail plate provided with a dovetail groove is slid into dove mortise protruding from the upper and lower flanges of a steel girder, and a fixing plate fixed to the web of the connecting arm and the girder is bolted. It is to take measures consisting of a structure.

[0006]

An embodiment of the present invention will be described with reference to the drawings. In FIG. 1, reference numeral 1 denotes a connecting arm made of an H-shaped steel for beam connection attached to a column 2, and the right end of the connecting arm 1 is provided on the upper and lower flanges 3, 3 slightly inside thereof so as to fill the width of the flange 3. Upper and lower dovetails 4 and 4 in the width direction are provided, and their mounting positions are different between the upper and lower flanges 3 and 3. A vertical cut 6 is provided at the right end of the web 5 of the connecting arm 1 from a position １ ／ of the height of the web 5, and a lower half portion in front of the cut 6 is a projection 7.

[0007] The left end of the girder 8 made of H-section steel connected thereto is symmetrical with the connecting arm 1. In other words, the upper and lower flanges 3 and 3 are provided with dovetail mortises 4 and 4 slightly different from the upper and lower positions on the left end, similarly to the connecting arm 1, and are provided on the web 5 corresponding to the cuts 6 of the connecting arm 1. A vertical cut 6 is provided, and the upper half on the left side is a projection 7.
A fixing plate 11 having bolt holes 10 for mounting bolts 9 on both sides of the webs 5 and 5 is fixed to the projections 7 and 7 in front of the cuts 6 and 6 in the web 5 of the connecting arm 1 and the girder 8. Have been. In addition, separately from these, the connecting arm 1 and the girder 8
At the positions of the dovetails 4 when the ends of the dovetails are joined, upper and lower attachment plates 13 and 13 having dovetail grooves 12 and 12 fitted to the dovetails 4 and 4 on both sides are prepared.

In order to connect the connecting arm 1 of the column 2 to the girder 8, the girder such that the flange 3 of the connecting arm 1 and the flange 3 of the girder 8 are aligned horizontally and the webs 5, 5 are aligned vertically. 8 are brought close by a crane or the like, and the dovetail grooves 12, 12 of the upper and lower attachment plates 13, 13 are horizontally slid into the dove mortises 4, 4 of the upper and lower flanges 3, 3 from the lateral direction. , 11 are screwed into the bolt holes 10 to keep the connecting arms 1 and the webs 5, 5 of the girders 8 straight, so that the dovetail grooves 12 of the attachment plate 13 do not come off from the dovetails 4 of the flange 3. It is fixed to.

[0009]

According to the first aspect of the present invention, most of the joining work of the steel beams is completed in a very short time, in which the attachment plate is slid into the dovetail provided on the flange of the steel frame when the steel frame is constructed. Since only a few bolts are used to fix the fixing plate, the joining operation is extremely simple, so that work can be performed even in rainy weather, and work can be performed in a short time. This is extremely effective in shortening the construction period. According to the second aspect of the present invention, a strong connection between the connecting arm and the girder can be obtained by a simple structure in which a dovetail having a dovetail is slid into a flange of a steel frame, and a slide plate having a dovetail groove is slid into the dovetail. By fixing, a reliable joint structure in which the attachment plate does not move can be obtained.

[Brief description of the drawings]

FIG. 1 shows one embodiment of the present invention, and FIG.
FIG. 2 is a front view of a part cut along line II of FIG.

2A is a plan view, and FIG. 2B is a cut-away plan view taken along line II-II in FIG.

FIG. 3 is a front view showing a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Connecting arm 3 Flange 4 Dovetail 5 Web 8 Large beam 9 Bolt 11 Fixing plate 12 Dovetail 13 Substrate

Claims (2)

(57) [Claims] 1. A dovetail (4) projecting from each of upper and lower flanges (3) of an H-shaped steel beam (8) connected to the connecting arm (1) made of an H-shaped steel. Dovetail (1
After sliding the attachment plate (13) having 2) from the lateral direction,
Fix the fixing plate (11) fixed to the web (5) with the bolt (9)
A steel beam joint method to be tightened. 2. A dovetail groove (12) is formed in a dovetail (4) projecting from each of upper and lower flanges (3) of a connecting arm (1) made of H-shaped steel and a girder (8) made of H-shaped steel. The provided attachment plate (13) is slid in, and each web (5) of the connecting arm (1) and the girder (8) is inserted.
A joint structure of a steel beam in which a fixing plate (11) fixed to the steel plate is bolted (9).