JP2005314883A - Reinforced concrete skeleton structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a reinforced concrete skeleton structure which allows boring of a new through hole therein according to application change without cutting reinforcements, is excellent in workability, and does not incur degradation in component member strength due to cutting of the reinforcements. <P>SOLUTION: In the skeleton structure, in which at least one of skeleton component members including beams 2, walls 3, and floor slabs 4, is formed of reinforced concrete having the reinforcements arranged in the concrete, when the skeleton component member formed of the reinforced concrete is constructed, reinforcements 7a, 11, 12, 15, 16 are arranged in a manner being brought close to each other, in a plurality of areas where the through holes 9, 13, 17 are not necessary, and therefore plain concrete areas 10, 14, 18 where the through holes 9, 13, 17 can be bored after the construction are formed. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a frame structure having a reinforced concrete beam, wall or floor slab.

In recent years, from the viewpoint of economic efficiency and environmental protection that reduces waste, there has been an increasing demand for renovating existing buildings and adapting them to new uses.
By the way, when refurbishing the existing building corresponding to another application, through the layout and equipment change, through holes for newly passing pipes etc. in the structural members such as beams and walls. Need to drill.

  On the other hand, in a building that uses reinforced concrete as structural members such as columns, beams, walls, etc., in order to maintain the strength of these structural members uniformly, it is necessary to pass openings, piping, ducts, etc. Reinforcing bars are arranged at equal intervals in the concrete except for the places where through holes are formed.

As a result, in order to drill the through-hole, a part of the reinforcing bar is cut, and thus the strength of the member is reduced at the through-hole forming site in the casing component member.
Therefore, conventionally, reinforcing members and the like are separately arranged around the portion where the through hole is formed to secure a desired member strength. For this purpose, reinforced concrete around the through hole is provided. There is a problem that it is necessary to hang, and the work becomes large-scale and requires a lot of labor, and there is a problem in that a place where the through hole is formed is restricted.

The prior art described in Patent Document 1 below is for solving such problems, and relates to a reinforced concrete building that can be easily changed and renovated after construction.
In this reinforced concrete building, as shown in FIG. 5, reinforcing bars 32 and 33 are previously placed on a reinforced concrete wall so as to surround the periphery of the potential opening 31, and diagonally outside the corner of the opening 31. A reinforcing bar 34 is arranged in advance.

According to such a reinforced concrete building, when an opening 31 is required as an entrance or the like due to a change in use of the building at a later date, the internal concrete is removed by cutting along a dotted line 35 in the figure with a disk cutter. Thus, there is an advantage that the opening 31 can be easily formed.
Japanese Patent Laid-Open No. 11-324173

  However, the above conventional technique is effective when it is possible to assume a place where the opening 31 is required at a later date during construction, but it is generally difficult to make such an assumption. There arises a restriction that an opening required when diverted to an application must be matched with the position of the opening 31 that is potentially prepared.

  In addition, since the through holes for inserting pipes, ducts and the like have a large number of places to be newly formed, the reinforcing bars 32, 33, 34 as described above are provided assuming all the through holes. It is uneconomical because the amount of reinforcement required is extremely large, and it is not realistic.

  The present invention has been made in view of such circumstances, and can cut a new through-hole according to a change in use without cutting the reinforcing bar. Therefore, it is excellent in workability and is a member resulting from cutting of the reinforcing bar. An object of the present invention is to provide a reinforced concrete frame structure that does not cause a decrease in strength.

  In order to solve the above-mentioned problem, the invention according to claim 1 is the case where at least one of the structural members of the beam, the wall, and the floor slab is composed of reinforced concrete in which reinforcing bars are arranged inside the concrete. By constructing through-holes after construction by placing the above-mentioned reinforcing bars or thick steel bars instead of the above-mentioned arranged reinforcing bars at multiple locations that do not require through-holes when building the reinforced concrete frame components It is characterized by forming a possible non-muscle region.

  Here, the invention according to claim 2 is characterized in that the frame component member is a beam and a plurality of the non-muscle regions are formed at equal intervals in the longitudinal direction of the beam. The invention according to claim 3 is characterized in that the frame component member is a wall or a floor slab, and a plurality of the non-muscle regions are formed at least around the pillar.

  The invention according to claim 4 is the invention according to any one of claims 1 to 3, wherein the non-muscle region is the vertical direction or It is formed in the position which opposes a horizontal direction.

  According to the invention according to any one of claims 1 to 4, even when the use of the building is changed and the layout, equipment layout, etc. are changed, according to the position of the new duct and piping accompanying this, as appropriate A through hole for inserting a duct or a pipe can be formed in the nearest non-muscle region among the non-muscle regions formed in the above-described casing component member. As a result, it is possible to cope with this without cutting the reinforcing bar, so that the construction is easy and the strength of the member due to the cutting of the reinforcing bar is not reduced.

  According to the second aspect of the present invention, when the frame structural member is a beam, a plurality of the non-muscle regions are formed at equal intervals in the longitudinal direction of the beam. At the time of drilling, it is possible to know the position of the unmuscle region that can be drilled without separately detecting the bar arrangement.

  Moreover, when the said frame structural member is a wall or a floor slab, it is not preferable to arrange | position the said unreasonable area | region previously in the whole surface from a viewpoint of whole intensity | strength maintenance. Therefore, as in the third aspect of the invention, if it is formed around at least a column that is highly likely to be inserted with a duct or a pipe, the overall strength is maintained and the above requirement is met. It becomes possible.

  Furthermore, since it is preferable to arrange the ducts and pipes linearly between the same or upper and lower layers, the unreasonable region is arranged in the vertical direction or the horizontal direction, particularly as in the invention of claim 4. It is preferable that the opposite casing constituent members are formed at positions facing each other in the vertical direction or the horizontal direction.

(First embodiment)
1 to 3 show a first embodiment of a reinforced concrete frame structure according to the present invention. In this frame structure, a column 1, a beam 2, a wall 3 and a floor slab 4 which are frame components are included. Both are made of reinforced concrete.
In the beam 2, as shown in FIGS. 1 and 2, the upper main bar 5 and the lower main bar 6 are arranged in the horizontal direction, and a plurality of annular barbs 7 are provided so as to surround them. Is arranged.

  Here, the normal barbs 7 are arranged at equal intervals over the entire length in the longitudinal direction along the upper and lower main bars 5, 6, but in the present embodiment, in the plurality of places that do not require through holes during construction, By arranging the barbs 7a and arranging them, an unlined region 10 is formed in which a through hole 9 indicated by a dotted line in the figure can be formed after construction.

  In other words, the barbs 7 are located at positions spaced equidistantly from the position A spaced apart from the column core of the column 1 or the column surface 1a by two horizontal bars 7a from the original equally spaced positions. The bars are arranged to the left and right in the figure. Thereby, the said non-muscle area | region 10 is formed between the gluteal muscles 7a.

  Further, on the wall 3, as shown in FIG. 2, the two horizontal bars 11 below the beam 2 are arranged downward and upward, respectively, and the two vertical bars 12 adjacent to the pillar 1 are respectively shown in the figure. The bars are arranged to the right and left. As a result, unstitched regions 14 capable of forming through-holes 13 indicated by dotted lines in the figure after construction are formed at the four corners of the corners where the pillar 1 and the upper beam 2 that do not require a through-hole at the time of construction are formed. Has been. The other horizontal stripes 11 and vertical stripes 12 are arranged at regular intervals in the vertical and horizontal directions, respectively, as usual.

  Further, as shown in FIG. 3, also in the floor slab 4 surrounded by the beam 2 and the small beam 2a, the two main bars 15 adjacent to the beam 2 are arranged to the right and left in the drawing, respectively. In addition, the two reinforcing bars 16 adjacent to the beam 2 and the small beam 2a are arranged upward and downward in the drawing, respectively. On the other hand, the other main reinforcing bars 15 and the distributing bars 16 are arranged at equal intervals in the horizontal direction.

Thus, through holes 17 indicated by dotted lines in the drawing after construction at three corners adjacent to the pillar 1 that do not require through holes during construction and at four corners where the beams 2 and the small beams 2a intersect. The non-muscle area | region 18 which can form is formed.
In addition, it is preferable to form these non-muscle regions 10, 14, and 18 in a width dimension capable of drilling through-holes 9, 13, and 17 having a maximum diameter of 200φ in a general beam-formed frame structure. However, this does not apply if the beam is large.

  According to the reinforced concrete frame structure configured as described above, even if the use of the building is changed and the layout or equipment layout is changed, the beam is appropriately changed depending on the position of the new duct and piping accompanying this. 2. A through hole for inserting the duct or pipe can be formed in the nearest one of the non-muscle regions 10, 14, 18 formed in the wall 3 or the floor slab 4.

At this time, the reinforced concrete member can resist various stresses by the compression resistance of the concrete and the tensile / compression resistance of the reinforcement, so that the through holes are formed in the unreinforced regions 10, 14, and 18. By installing, construction is easy and the strength of the member due to cutting of the reinforcing bars is not reduced.
In addition, because of this, it is generally possible to drill through-holes without any additional reinforcement. However, when the through-holes need to be reinforced with compressive resistance due to concrete cross-sectional defects For this, as shown in FIG. 1, a reinforcing steel pipe 20 may be inserted into the through hole 9. The same applies to not only beams but also walls and slabs.

  Further, when the reinforcing steel pipe 20 is provided, it is more preferable that an adhesive, a mortar material, or the like is filled between the through hole 9 and the reinforcing steel pipe 20 in order to ensure adhesion between the through hole 9 and the reinforcing steel pipe 20. In addition, if the abdominal muscles are arranged on the side of the non-muscle region, it is possible to prevent the cracks from being generated by the through holes 9.

  Further, in this frame structure, a plurality of unstriped regions 10 are formed at equal intervals in the longitudinal direction of the beam 2 from a position A spaced apart from the column core of the column 1 or the column surface 1a by a certain dimension. Therefore, when the through-hole 9 is drilled, it is possible to know the position of the unmuscle region 10 that can be drilled without separately detecting a bar arrangement.

  In addition, as for the wall 3 and the floor slab 4, a plurality of non-muscle regions 14 and 18 are formed around the column 1 where the duct or piping is likely to be inserted. It is possible to meet the above-mentioned demands due to application changes while maintaining the overall strength.

(Second Embodiment)
FIG. 4 shows a second embodiment of the present invention. The same components as those shown in FIGS. 1 and 2 are denoted by the same reference numerals, and the description thereof is simplified.
In this frame structure, in the pair of beams 2 facing in the horizontal direction, the unstriped regions 10 are formed at positions facing each other in the horizontal direction. Here, as shown in FIG. 1 and FIG. 2, the unlined regions 10 in one beam 2 may be formed at regular intervals in the longitudinal direction, or may be formed at regular intervals in this way. It does not have to be.

  According to the frame structure having the above-described configuration, the unmuscle region 10 is formed at the position facing the horizontal direction in the beam 2 facing the horizontal direction. Even when the through hole 9 is formed in the region 10 and a new duct or pipe 25 indicated by a dotted line in the figure is added, the duct or pipe 25 can be arranged linearly.

  In the first embodiment, the case where the non-muscle regions 10, 14, and 18 are formed in all the structural members of the beam 2, the wall 3, and the floor slab 4 has been described. However, the present invention is not limited to this. Rather, the present invention includes forming an unmuscle region in at least one of the above-described structural members.

  Further, when forming the non-muscle regions 10, 14, and 18, in addition to the above-described close-up reinforcement, thick reinforcing bars may be arranged on both sides of the non-muscle regions 10, 14, and 18. Furthermore, although only the case where the non-muscle area | region 14 was formed in the upper corner corner of the wall 3 was demonstrated, it is not restricted to this, The same non-muscle area | region should be formed also in the lower corner corner of the said wall 3 Is also possible.

Moreover, about the wall 3 and the floor slab 4, although the unmuscle area | regions 14 and 18 were formed in the circumference | surroundings of the pillar 1 in 3-4 places, it is also possible to form the said unmuscle area | regions 14 and 18 in more places. It is.
Further, in the second embodiment, only the case in which the non-muscle region 10 is formed at the facing position for the beam 2 facing in the horizontal direction has been described. Similarly, the wall 3 and the floor slab 4 facing in the vertical direction are also described. The unmuscle regions 14 and 18 are preferably formed at opposite positions, respectively.

It is a bar arrangement diagram of the principal part of the beam in the 1st example of the present invention. FIG. 3 is a bar arrangement diagram of beams and walls in the first embodiment. It is a bar arrangement diagram of the floor slab in the first embodiment. It is a top view which shows 2nd Example of this invention. It is a bar arrangement diagram of the principal part in the conventional reinforced concrete building.

Explanation of symbols

2 Beam (frame component)
3 walls (frame components)
4 Floor slabs (body components)
7, 7a Gluteal muscle 9, 13, 17 Through-hole 10, 14, 18 Unmuscle region 11 Transverse muscle 12 Longitudinal muscle 15 Principal muscle 16 Strengthening muscle

Claims (4)

In the frame structure in which at least one frame structural member of the beam, wall, and floor slab is configured by reinforced concrete in which reinforcing bars are arranged inside the concrete,
Through holes can be formed after building by arranging the reinforcing bars or thick steel bars in place of the aligned bars at multiple locations that do not require through holes when building the reinforced concrete frame components. Reinforced concrete frame structure characterized by the formation of an unbarbed area.   2. The reinforced concrete frame structure according to claim 1, wherein the frame component member is a beam, and the plurality of unstriped regions are formed at equal intervals in a longitudinal direction of the beam.   2. The reinforced concrete frame structure according to claim 1, wherein the frame component member is a wall or a floor slab, and a plurality of the non-barbed regions are formed at least around a column.   The said non-muscle area | region is formed in the position which opposes the said up-down direction or a horizontal direction, respectively in the said casing structural member which opposes an up-down direction or a horizontal direction. The reinforced concrete frame structure described.

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