JPH0681356A - Connecting method for temporary steel column and beam - Google Patents

Abstract

PURPOSE:To absorb the plumbing error without problem on the structural yield strength and construct an underground structure having high structural reliability in the SRC reverse build-up construction method. CONSTITUTION:The length and width of the upper and lower flanges 2a of the bracket 2 of a temporary steel column A are set larger by the plumbing error of the column in advance, the length of the web 2b of a steel-framed beam 3 having a column hoop bar insertion hole 8 and a bolt hole 6 made of a horizontal loose hole is set shorter by the plumbing error of the column in advance, the temporary steel column A is plumbed in a pile C, and the flanges 2a are cut off by the error. The beam web and the web 2b of the bracket 2 are arranged face to face across a gap for inserting the column hoop bars 14 between them, a splice plate 7 having the column hoop bar insertion hole 8 is joined, then the flanges 3a, 2a of the beam 3 and the bracket 2 are welded.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of connecting a false column and a beam in a reverse lamination method.

[0002]

2. Description of the Related Art The reverse laminated construction method used for underground construction parts is an SRC structure pillar that is built into a pile by an underground construction technology that combines the conventional reverse construction method technology with prefab technology.
This is a construction technology that combines beams with a PC structure.

[0003]

The above-mentioned reverse lamination method aims at labor saving of work, reduction of temporary materials, improvement of safety, and shortening of the construction period. The important point is how accurately the PC beam on the 3rd basement floor can be installed.

The present invention has been proposed in view of the above circumstances, and an object thereof is to construct an underground structure having a structurally high reliability by absorbing an installation error without a problem in structural strength. The point is to provide a method of connecting the true columns and beams that can be done.

[0005]

In order to achieve the above-mentioned object, according to the method of connecting a structured column and a beam according to the present invention, the SR
C When joining the structure columns and beams in the reverse lamination method, the lengths and widths of the upper and lower flanges of the structure column brackets are made large in advance by the column construction error, and consist of beam hoop insertion holes and horizontal loose holes. The length of the web with the bolt holes is made short in advance by the amount of the building error of the column and built in the pile, and the flange of the amount of the building error of the column is cut before mounting the beam, and the beam web and the bracket A web and a pair of pillars for hoop muscle insertion between them are provided opposite to each other, and the pillar and beam webs are joined via a splice plate having a pillar hoop muscle insertion hole, and then, The beam and the flange of the bracket are welded.

[0006]

According to the present invention, the lengths and widths of the upper and lower flanges of the bracket of the true-column are made larger in advance by the building error of the column. The flange is cut by the amount of erection error, and the length of the web in the bracket is made shorter by the amount of the erection error of the column, and the mounting bolt holes of the splice plate for joining the bracket and beam webs are made horizontal. Waiting for it to be a loose hole in the direction, it can be set to absorb the error in the erection in the horizontal direction.

Further, a gap for inserting the hoop reinforcement for a column is provided between the web of the bracket and the beam web, and a through hole for the hoop reinforcement is provided in the splice plates of both the webs, whereby The hoop muscles are arranged reliably.

[0008]

The present invention will be described below with reference to the illustrated embodiments. Reference symbol A is a true column of SRC structure, 1 is a steel column of the same column, 2 is a bracket which is horizontally projected from the column 1, and is composed of a flange 2a and a web 2b, which are vertically aligned.
The upper and lower flanges 3a and the web 3b of the steel beam 13 of the C beam B are joined together. In the figure, 4 is a rib.

The flange 2a of the bracket 2 is manufactured to be 20 mm longer than the regular size L and can be cut to 40 mm. Regarding the width of the bracket 2, one side 20 + 5 = 2 in advance in consideration of the end tab length d = 5 mm during flange welding.
Widely manufactured by 5 mm each, it was set to be able to absorb the horizontal error.

Further, the web 2b is provided with a bolt hole 6 which is a horizontal loose hole. A splice plate 7 has column hoop muscle insertion holes 8 arranged in a row. Then, the true pillar A constructed as described above is built in the pile C. In the figure, 9 is a pile extra concrete stop plate, 1
Reference numeral 0 is a support slab flat slab, 11 is a column bottom concrete stop member, and 12 is a beam main bar insertion hole which is a horizontal loose hole.

When the building of the true column A is completed, the flange 2a of the bracket 2 is cut by the amount of the building error of the column as shown by the diagonal lines in FIG. 3, and the web 2b and SR of the bracket 2 are cut.
The C-beam B is installed opposite to the web 3b of the steel beam 13 with an insertion gap of the column hoop streak 14, and both webs are inserted into the bolt hole 6 through the splice plate 7. After joining with a tension bolt, the column hoop reinforcement 14 is then inserted into the gap between the column hoop reinforcement insertion hole 8 in the splice plate 7, the steel beam 13 of the beam B and the bracket web 2b. After that, the flange 2a of the bracket 2 and the flange 3a of the steel beam 13 are welded together.

The error in the plate thickness direction is adjusted by inserting a liner between the splice plate 7 and the web of the bracket and the steel beam 13.

[0013]

As described above, according to the present invention, in the reverse lamination method, it is possible to secure the correct groove shape, spacing and welding length of the beam flange welded portion of the SPC structure joined to the true column. Therefore, the beam main bar and the column hoop bar can be held in correct positions, and a regular cover thickness can be secured.

As described above, according to the present invention, the joint portion between the structure column and the beam having excellent structural performance is formed while absorbing the installation error of the structure column, and the structure column is highly reliable. You can build a structure.

[Brief description of drawings]

FIG. 1 is a plan view showing an implementation state of an embodiment of a method of connecting a false column and a beam according to the present invention.

FIG. 2 is a front view of FIG.

FIG. 3 is a detailed view of a part (a) of FIG.

FIG. 4 is a partial vertical cross-sectional view showing an implementation state of an SRC reverse lamination method.

[Explanation of reference symbols] A true column B beam C pile 1 steel frame column 2 bracket 2a bracket flange 2b bracket web 3a beam flange 3b beam web 4 ribs 6 bolt hole 7 splice plate 8 column hoop insertion Hole 9 Pile surplus concrete retaining plate 10 Supporting flat slab 11 Column bottom concrete retaining member 12 Beam main bar insertion hole 13 Steel beam 14 Column hoop reinforcement

Claims (1)

[Claims] 1. When joining a structural column and a beam in the SRC reverse lamination method, the lengths and widths of the upper and lower flanges of the structural column bracket are increased in advance by the column construction error, and the beam hoop insertion hole and the horizontal direction. The length of the web with bolt holes consisting of loose holes is made short in advance by the amount due to the build-up error of the column and built into the pile, and the flange for the build-up error of the column is cut before mounting the beam. The web of the bracket and the web of the bracket are opposed to each other with a gap for inserting a hoop muscle for a pillar between them, and the web of the pillar and the beam is inserted through a splice plate having a hoop muscle inserting hole for a pillar. After joining, the beam and the flange portion of the bracket are welded together, and a method of connecting a true post and a beam.