JPH09279859A - Joint structure between existing building and extension building - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an effective structure capable of connecting an extension building to the existing building rationally. SOLUTION: Columns 1a and 1b positioned to both ends of a joint section among columns of both buildings positioned in the joint section between the existing building A and an extension building B are adjacent to each other and are arranged, the existing building and extension building are connected by connecting then to each other with the plates 2, etc., to omit the connection between other columns positioned in an intermediate section. If necessary, beams or slabs in the joint section between both buildings are connected to reach other in an important position, or an extension slab projected to the outside of the joint section to lie across both buildings is provided to connect both buildings with the extension slab.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a structure for connecting an extension building provided adjacent to an existing building to the existing building.

[0002]

2. Description of the Related Art When a large-scale extension work is performed on an existing building, the extension building is provided adjacent to the existing building and the extension building is connected to the existing building. The most common form of connection adopted in such a case is shown in FIG. This is because the span ratio of the extension building B to be connected to the existing building A is made to match that of the existing building A, and the two pillars 1a and 1b are arranged close to each other in the connecting portion, and the pillars 1a and 1b are arranged. For example, they are connected by a tie plate 2 to be structurally integrated.

[0003]

In the above-mentioned connection structure, the columns 1a and 1b have a large number of connection points, which inevitably increases the labor and cost of the connection work. . Further, since the span ratio of the extension building B must be matched with that of the existing building A, there is a constraint that the extension building B cannot be freely designed. From the above, effective improvement measures have been demanded. .

[0004]

In view of the above-mentioned circumstances, the present invention is located at a connecting portion between an existing building and an additional building when connecting the additional building provided adjacent to the existing building to the existing building. Existing columns and extension buildings by arranging the columns located at both ends of the connecting part in close proximity to each other and connecting the columns located at both ends to each other. Is connected, and the connection between the pillars in the middle part is omitted. In this case, in addition to connecting the above-mentioned pillars, beams or slabs of both buildings located at the connecting portion may be connected at a point between the pillars, or outside the connecting portion. It is also possible to provide an extension slab that extends over both sides of the building and to connect the two buildings with the extension slab.

[0005]

1 to 4 show an embodiment of the present invention. The present embodiment is applied when connecting the steel building extension building B to the steel structure existing building A as well, and as shown in FIG. 1, two wires are respectively located at both ends of the connecting portion. Pillars 1a, 1b are arranged close to each other with a slight gap, and only the pillars 1a, 1b are connected, and the connection between the other pillars 1a, 1b located in the middle part of the connecting portion is omitted. The point that was done is characteristic.

The form of connection between the pillars 1a and 1b located at both ends is appropriate as long as the pillars 1a and 1b can be structurally and firmly connected to each other. However, in the present embodiment, FIG. 2 and FIG. As shown in, the steel plate is used as a tie plate 2 and directly welded to the side surfaces of the columns 1a and 1b so that the columns 1a and 1b are connected to each other through the tie plate 2. The welding position of the tie plate 2 is the position of the flange of the beams 3a, 3b joined to the pillars 1a, 1b, and the diaphragm is located inside the pillars 1a, 1b at a position where the flange and the tie plate 2 are continuous. 4a, 4b are welded together to strengthen the structural integrity of both columns 1a, 1b.

As shown in FIG. 3, both buildings A and B are
A slab 5 may be provided in the gap between the two so that the slabs 5a and 5b of both buildings A and B are continuous. Further, in addition to connecting the columns 1a and 1b at both ends as described above, the beams 3a and 3b of the two buildings and the slabs 5a and 5b may be connected to each other as necessary. In the present embodiment, as shown in FIGS. 2 and 4, steel plates serving as a tie plate 6 are welded to the upper and lower flanges of both beams 3a and 3b located at the connecting portion, and the stiffener plate 7 is attached at that position. Therefore, the beams 3a and 3b
The slabs 5a and 5b are connected to each other at important points, and the slabs 5a and 5b are embedded with the anchor bars 8 as shown in FIG.

According to the above structure, the buildings A and B are structurally connected only by connecting the pillars 1a and 1b located at both ends of the connecting portion.
The number of connection points is greatly reduced compared to the conventional case, and the rationalization of the connecting work is realized. Of course, by simply connecting the columns 1a and 1b at both ends,
B can be integrated without any structural problem, but if necessary, more reliable connection strength can be secured by connecting beams 3a and 3b and slabs 5a and 5b at important points as described above. You can

Also, the pillars 1a, 1 in the middle of the connecting portion
b Since the columns do not connect to each other, it is not necessary for the columns to be adjacent to each other. Therefore, it is not necessary to match the span ratio of the extension building B to the existing building A.
There is no restriction in designing, and as a result, it becomes possible to make the span ratio of the extension building B larger than that of the existing building A or vice versa as shown in FIG. .

FIG. 5 shows another embodiment of the present invention. This embodiment is applied to the case of reinforced concrete construction (RC construction), as shown in FIG. 5, RC columns 1a and 1b located at both ends of the connecting portion are brought into close contact with each other, The pillars 1a and 1b are structurally connected by an anchor bar 9 to connect the buildings A and B to each other. Further, in this case, as shown in FIGS. 5 and 6, the beams 3a and 3b of both buildings may be connected to each other at an important point by the anchor bar 10 as required.

FIGS. 7 and 8 show another embodiment applied to RC manufacturing. In this case, in addition to connecting the pillars 1a and 1b at both ends with the anchor streak 9 in the same manner as described above, the extension slab 11 that straddles both buildings A and B is projected to the outside of the connecting portion. In addition, both buildings A and B are provided in a state of being integrated by a large number of anchor bars 12, and the additional slab 11 also connects both buildings A and B.

[0012]

As described above, according to the present invention, the existing building and the additional building are structurally connected by connecting only the columns located at both ends of the connecting portion, and the connecting portion is connected. Since the connection between columns is omitted in the middle part of, the work related to connection can be rationalized while securing the connection strength without any hindrance, and it is not necessary to match the span ratio of the extension building to that of the existing building. Therefore, there is an advantage that the constraint when designing the extension building is eliminated.
Then, if necessary, beams and slabs are connected to each other at important points, or both buildings are connected by an extension slab that extends to the outside of the connection part, so that the connection strength can be made more reliable. .

[Brief description of drawings]

FIG. 1 is an overall plan view showing a connecting structure according to an embodiment of the present invention.

FIG. 2 is a partially enlarged plan view of the same.

FIG. 3 is an elevation view of the same.

FIG. 4 is a view taken along the line IV-IV in FIG.

FIG. 5 is a partially enlarged plan view showing a connection structure according to another embodiment of the present invention.

6 is a view taken along the line VI-VI in FIG.

FIG. 7 is a partially enlarged plan view showing a connection structure according to still another embodiment of the present invention.

8 is a view taken along the line VIII-VIII in FIG.

FIG. 9 is an overall plan view showing a conventional general connecting structure.

[Explanation of symbols]

 A Existing building B Expanded building 1a, 1b Pillar 2,6 Tilt plate 3a, 3b Beam 5a, 5b Slab 8,9,10,12 Anchor bar 11 Additional slab

Claims (4)

[Claims] 1. A structure for connecting an extension building provided adjacent to an existing building to the existing building, wherein the pillars of both buildings are located at a connection portion between the existing building and the extension building. Among them, the columns located at both ends of the connecting portion are arranged in proximity to each other, and the columns located at both ends are connected to each other to connect the existing building and the additional building. Connection structure between existing building and extension building. 2. The connection structure between an existing building and an extended building according to claim 1, wherein beams of both buildings located in the connection portion are connected to each other at a point between the columns. . 3. The existing building and the extension building according to claim 1 or 2, wherein the slabs of both buildings located at the connecting portion are connected to each other at a key point between the columns. Connection structure. 4. The extension slab that extends outside the connection portion and extends over both buildings is provided, and the two buildings are connected by the extension slab. Connection structure of existing building and extension building.