JPH07331735A - Joint part construction of reinforced concrete post and steel framed beam and construction method thereof - Google Patents

Abstract

PURPOSE:To provide rigid joint part construction against, earthquake force by arranging a saddle member in a space between the lower part of girders and vertical part concrete, contacting a plate member with the upper part of the saddle member so as to rigidly join girders, and pin-joining beams squarely with a girder through a bracket. CONSTITUTION:A peripheral wall 1, pillars 2, and posts 3 are formed into RC-structures, and girders 4 and beams 5 are formed into S-structures. Concrete of the vertical part of the post 3 under the girder 4 is placed and mortar 11 is laid thereon, and a saddle member 9 is fixed thereon with anchor bolts 10. Next the girders 4 are butted with each other on the member 9 and piled up, a plate member 12 is contacted with them and fastened with the member 9 by bolts so as to join together the girders 4 in the lengthwise direction. The beams 5 are fitted to the joint part of the girders 4 through a bracket 6 so as to squarely cross the girders 4. Because the beams 5 are pin-joined in the construction for joining the posts and beams, earthquake force is borne by the surrounding RC-structure, but the girders 4 are fastened with each other by bolts through the members 12 so as to be a rigid joint, and have resistance against earthquake force in the direction of the girder 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a joint portion between a column reinforced concrete (hereinafter abbreviated as RC) structure and a beam steel frame (hereinafter abbreviated as S) structure.

[0002]

2. Description of the Related Art Conventionally, a flat slab structure or a mixed structure has been used in a structure having (a) a low-rise building, (b) a large plane (c) a long span (d) an outer wall having an RC structure. With a flat slab structure, if the span is around 11 m, it is uneconomical and it is difficult to plan the whole.

[0003]

As described above, if the flat slab structure has a span of about 11 m, it is uneconomical and the overall plan becomes difficult, and the cost of steel-based products such as mixed is high and the construction period is correspondingly long. . For this reason, the inventors of the present invention filed a Japanese patent application No. Hei 5-1664646 with an RC outer wall, and the inside of the building had an R pillar.
When C-beam is S-beam, beam-to-beam and column-to-beam are pin-joined without using welding, and a simple method is proposed in which the RC-frames in the vicinity have earthquake resistance against seismic force. The present invention further improves these, and is a structure of which the number of welded points is smaller than that of the conventional bracket type, and the unidirectional beam has a structure that is rigid against seismic force, the columns are RC structures, and the beams are S structures. Providing a joint structure between columns and beams.

[0004]

[Means for Solving the Problem] The outer wall and columns of the building are all RC structures. The beams inside the building will be S-shaped. Concrete will be placed on the outer and inner columns of the structure to the bottom of the steel beam. After that, mortar is laid and the saddle member is mounted and the level is adjusted. After that, lay it on the saddle member and place the girder,
The girder is bolted to the caul plate member and the saddle member, and the girder is rigidly joined in the longitudinal direction. The beam is fastened with a bolt through a bracket in a direction perpendicular to the joint to form a pin joint. After that, the deck plate is laid and the slab reinforcement is arranged, and concrete is placed on the slab and panel part.

[0005]

EXAMPLE FIG. 4 shows an overall view of the example. The peripheral wall 1 and the pillars 2 and the post pillars 3 in the peripheral wall 1 are made of RC. The girders 4 and the girders 5 are constructed as an S structure. FIG. 5 shows a joint portion A between the large beam 4 and the small beam 5. The beam 5 is bolted to the bracket 6 attached to the beam 4. FIG. 1 shows a plan view of a joint portion B between the post pillar 3 and the large beam 4 and the small beam 5. FIG. 2 is a sectional view taken along line CC of FIG. The concrete of the vertical portion of the pillar 3 is cast to the bottom of the girder 4, mortar 11 is laid, and the saddle member 9 is fixed with the anchor bolt 10 while adjusting the level. The girder 4 is joined to the saddle member 9 in a longitudinal direction while the girders are abutted against each other and stacked on top of each other. The beam 5 is inserted through the bracket 6 so as to be orthogonal to the joint portion of the beam.
Attach. The bracket may be welded to the girder. Figure 3
Shows a DD sectional view of FIG. 1.

After that, the closed hoop reinforcement 8 is lowered from above along the main reinforcement 7 of the column, the deck plate is laid, the slab reinforcement is laid, and concrete in the horizontal portion is poured. At this time, since the saddle member is located below the flange of the girder 4, the space is wide and the concrete can be easily filled. In this joint structure of columns and beams, the beam is pin-jointed, so the seismic force is
The construction will bear the burden, but Ohashi will use the backing plate member 12,
Since it is firmly bolted through the saddle member 9, it is considered to be a rigid joint and has a reaction force against the seismic force in the direction of the girder.

[0007]

The effects of the present invention are as follows.

(A) A structure having a long span can be formed with a relatively simple frame.

(B) Since the beam is a steel frame, the weight of the building can be reduced.

(C) Steel beams are bolt joints and fillet welds for brackets, and are simple without butt welding.

(D) The saddle member at the beam joint portion forms a rigid joint, and thereby the filling property of concrete under the steel frame beam can be secured.

(E) Since the bolt cannot be seen through the inside of the pillar on the upper surface of the beam flange, the notch is not required for laying the deck.

(F) Since there is no steel frame in the pillar, the number of steel frames may be small.

(G) The joint portion of the steel frame is only the column portion, and it is joined at about half the place of the conventional bracket type,
Processing time and bolt mounting time are reduced.

[Brief description of drawings]

FIG. 1 is a plan view showing a joint between an RC column and an S beam according to the present invention.

FIG. 2 is a sectional view taken along line CC of FIG.

FIG. 3 is a sectional view taken along line DD of FIG.

FIG. 4 is a diagram showing an overall configuration of the present invention.

FIG. 5 is a diagram showing pin connection between a girder and a girder.

[Explanation of symbols]

1 ... RC peripheral wall, 2 ... RC peripheral column, 3
... RC columns, 4 ... Large beams, 5 ... Small beams, 6 ...
..Brackets, 7 ... main bars of columns, 8 ... closed hoop bars, 9 ... saddle members, 10 ... anchor bolts
11 ... Mortar, 12 ... Pad plate member

Claims (2)

[Claims] 1. In a structure in which the peripheral wall 1, the peripheral column 2 and the internal column 3 are made of reinforced concrete and the internal beams 4, 5 are made of steel frame, the columns 2, 3 and the beams 4, 5 are joined by the above-mentioned method. Place the saddle member 9 in the space between the lower part of the beam 4 and the vertical concrete,
The beam 4 is butted against and mounted on the saddle member 9 and the pad plate member 1
2. A joint structure of a reinforced concrete column and a steel frame beam, characterized in that a rigid joint is formed by abutting 2 and the beam 5 is pin-joined to the beam 4 through a bracket 6 so as to be orthogonal to the beam 4. 2. Saddle member 9 is constructed by placing concrete with peripheral pillars 2 and internal pillars 3 under beams 4, maintaining a space for saddle members 9 and laying mortar 11 on the concrete upper surface. Install and adjust the level, and place the beam 4 on the saddle member 9.
Are butt-positioned and fastened to the backing plate member 12 with a bolt to form a rigid joint, and the beam 5 is orthogonally crossed to the beam 4 via the bracket 4 and the bracket 6 to form a pin joint,
Laying the deck plate, arranging the slab muscles, slab,
The concrete is placed on the panel and the upper part of the pillar.
Method for joining reinforced concrete columns and steel beams as described.