JP6623018B2 - Column structure - Google Patents

Description

  The present invention relates to a column structure.

  Conventionally, a sleeve joint embedded in a column base of a precast concrete column is fitted to a column that protrudes upward from the building frame, and the column position is adjusted by sliding the precast concrete column laterally ( For example, Patent Document 1).

JP 2009-121035 A

  By the way, in the construction method of the PCa column, the position of the lower column member may deviate from the normal position beyond the adjustable range. In this case, as shown in the above-mentioned Patent Document 1, after fitting the sleeve joint of the upper pillar member to the main bar protruding from the upper surface of the lower pillar member, the lower pillar The displacement of the member cannot be absorbed.

  In view of the above fact, an object of the present invention is to provide a column structure that can absorb the displacement of the lower column member on the upper column member side.

The column structure according to claim 1 includes a lower column member in which a first reinforcing bar protrudes from an upper surface, a height less than a floor height, and is disposed between upper and lower slabs and mounted on an upper portion of the lower column member. is location, the first connection hole is formed to be inserted with a gap around the first reinforcing bar to the lower surface, a center post member second rebar projecting from the upper surface, the upper portion of the center post member And an upper column member in which a second connection hole is formed on the lower surface and inserted with a gap around the second reinforcing bar.

  According to the column structure of claim 1, a gap is formed between the periphery of the first reinforcing bar and the first connection hole, and a gap is also formed between the periphery of the second reinforcing bar and the second connection hole. Has been. For this reason, even when the lower column member is deviated from the normal position, the position deviation of the lower column member can be absorbed on the upper column member side by adjusting the gap width between the two positions.

The column structure according to claim 2 includes a lower column member having a third connection hole formed on an upper surface, a height less than a floor height, and is disposed between upper and lower slabs and mounted on an upper portion of the lower column member. is location, the third reinforcing bars are projected to be inserted with a gap between the inner peripheral wall of the third connection hole from the bottom surface, and a center post member having a fourth connection hole is formed on an upper surface, said in And an upper column member provided with a fourth reinforcing bar protruding from the lower surface and inserted into the inner peripheral wall of the fourth connection hole with a gap.

  According to the column structure of the second aspect, a gap is formed between the third reinforcing bar and the inner peripheral wall of the third connection hole, and there is also a gap between the fourth reinforcing bar and the inner peripheral wall of the fourth connection hole. Is formed. For this reason, even when the lower column member is displaced from the normal position, the positional displacement of the lower column member can be absorbed by adjusting the gap width between the two locations.

The column structure according to claim 3 is the column structure according to claim 1, wherein at least one of the first connection hole and the second connection hole is a gap of 6 mm or more for a reinforcing bar having a nominal diameter of 29 mm or less. For a reinforcing bar with a nominal diameter of 32 mm, a clearance of 7 mm or more, for a reinforcing bar with a nominal diameter of 35 mm, a clearance of 8 mm or more, for a reinforcing bar with a nominal diameter of 38 mm, for a reinforcing bar with a nominal diameter of 41 mm The size is such that a gap of 10 mm or more is formed, and for a reinforcing bar having a nominal diameter of 51 mm, a gap of 11 mm or more is formed.

  According to the pillar structure of the third aspect, one or both of the first connection hole and the second connection hole have a large diameter. For this reason, the clearance gap with the reinforcing bar inserted in each connection hole becomes large. Therefore, it is possible to increase the absorption margin for absorbing the position shift of the lower column member.

The column structure according to claim 4 is the column structure according to claim 2, wherein at least one of the third connection hole and the fourth connection hole is a gap of 6 mm or more for a reinforcing bar having a nominal diameter of 29 mm or less. For a reinforcing bar with a nominal diameter of 32 mm, a clearance of 7 mm or more, for a reinforcing bar with a nominal diameter of 35 mm, a clearance of 8 mm or more, for a reinforcing bar with a nominal diameter of 38 mm, for a reinforcing bar with a nominal diameter of 41 mm The size is such that a gap of 10 mm or more is formed, and for a reinforcing bar having a nominal diameter of 51 mm, a gap of 11 mm or more is formed.

According to the pillar structure of the fourth aspect, one or both of the third connection hole and the fourth connection hole have a large diameter. For this reason, the clearance gap with the reinforcing bar inserted in each connection hole becomes large. Therefore, it is possible to increase the absorption margin for absorbing the position shift of the lower column member.
The columnar structure according to a fifth aspect is the columnar structure according to any one of the first to fifth aspects, wherein the lower column member and the middle column member are provided with convex portions on upper end surfaces.

  As described above, the column structure of the present invention has an excellent effect that the displacement of the lower column member can be absorbed on the upper column member side.

It is a sectional elevation showing the pillar structure concerning the 1st and 2nd embodiments of the present invention. (A) is the elements on larger scale which show the pillar structure concerning a 1st embodiment of the present invention, and (B) is a top view showing the lower pillar member of the pillar structure concerning a 1st embodiment of the present invention. . (A) is a fragmentary sectional view at the time of arrange | positioning so that the outer peripheral surface of the lower column member of the column structure which concerns on 1st Embodiment of this invention, and the outer peripheral surface of a middle column member may become flush | planar, It is a fragmentary sectional view at the time of arranging the outer peripheral surface of a lower pillar member, and the outer peripheral surface of a middle pillar member shifting. It is a table | surface which shows the relationship between the reinforcing bar diameter and sleeve internal diameter of the column structure which concerns on 1st, 2nd embodiment of this invention. It is the elements on larger scale which show the pillar structure which concerns on 2nd Embodiment of this invention.

[First Embodiment]
Hereinafter, an example of a column structure according to the first embodiment of the present invention will be described with reference to FIGS. 1, 2, 3 (A), and (B).

(Overall structure)
First, the entire structure of the column structure 10 according to the present embodiment will be described. As shown in FIG. 1, a column structure 10 according to the present embodiment is a connecting column applied to a building 100, and a lower column member 20 formed of precast concrete (hereinafter sometimes referred to as PCa). The middle pillar member 40 and the upper pillar member 60 are included.

(Lower column member)
Next, the configuration of the lower column member 20 will be described. As shown in FIG. 1, the lower column member 20 is raised from the upper part of the foundation beam 80 and supports the capital 84 </ b> A of the flat slab 84. In the present embodiment, the building 100 has a flat slab structure in which the flat slabs 84 and 86 are used for the floor set, but the embodiment of the present invention is not limited to this. For example, a ramen structure that supports a slab with a beam may be used. In this case, for example, a column beam joint is formed at the top of the lower column member or the upper column member.

  As shown in FIGS. 1 and 2A, an upper end portion of a column main bar 24 as an example of the first reinforcing bar of the present invention protrudes from the upper surface 22 of the lower column member 20 which is flush with the capital 84A. Yes. The column main reinforcing bar 24 is a deformed reinforcing bar having a nominal diameter φ1 of about 35 mm (a deformed steel bar whose nominal name is defined as “D35” in the Japanese Industrial Standard JIS G 3112), and as shown in FIG. Twelve are provided along the outer periphery. In addition, a nominal diameter shows an outer diameter.

  A convex portion 26 is provided on the upper surface 22 of the lower pillar member 20, and a gap V <b> 1 is formed between the lower pillar member 20 and the middle pillar member 40 by the convex portion 26. By injecting grout into the gap V <b> 1, the grout is filled (press-fitted) into a sleeve 46 of the middle pillar member 40 described later, and the lower pillar member 20 and the middle pillar member 40 are joined. When the grout is injected into the gap V1, the periphery of the gap V1 is sealed with a joint member such as an air tube or a kneaded mortar to suppress the outflow of the grout.

(Medium pillar member)
Next, the configuration of the middle column member 40 will be described. As shown in FIG. 1, the middle column member 40 is placed on the lower column member 20. The height of the middle pillar member 40 is less than the floor height of the building 100 and has the same cross-sectional shape as the lower pillar member 20 in plan view.

  As shown in FIG. 2A, a sleeve 46 that opens to the lower surface 42 is provided on the lower surface 42 of the middle column member 40. The sleeve 46 is a cast iron joint member embedded in advance when the middle pillar member 40 is formed, and has an inner diameter D1 of about 51 mm, for example. The column main reinforcement 24 protruding from the upper surface 22 of the lower column member 20 is inserted into the sleeve 46. A grout discharge hole (not shown) is formed in the upper portion of the sleeve 46, and the sleeve 46 and the outside of the middle column member 40 are communicated with each other.

  The sleeve 46 is an example of the first connection hole of the present invention. However, the configuration of the first connection hole is not limited to this, and a configuration in which a hole is formed in the lower surface 42 without using a sleeve is also possible. Good. In this embodiment, grout is continuously injected from the gap V1 to the sleeve 46. However, the embodiment of the present invention is not limited to this, and, for example, drops into the gap V1 from an injection hole provided in the upper portion of the sleeve 46. Thus, grout may be injected.

  A column main bar 44 as an example of the second reinforcing bar of the present invention is embedded inside the middle column member 40, a lower end portion of the column main bar 44 is inserted into the sleeve 46, and an upper end portion is an upper surface 48 of the middle column member 40. Protruding from. The column main bars 44 are deformed reinforcing bars having a nominal diameter φ2 of about 35 mm, similar to the column main bars 24, and are provided along the outer periphery of the middle column member 40.

  The column main bars 44 are positioned coaxially with the column main bars 24 of the lower column member 20 when the axis M2 of the middle column member 40 and the axis M3 of the lower column member 20 coincide.

  A convex portion 49 is provided on the upper surface 48 of the middle pillar member 40, and a gap V <b> 2 is formed between the middle pillar member 40 and the upper pillar member 60 by the convex portion 49. By injecting grout into the gap V2, the grout is filled in a sleeve 66 of the upper column member 60 described later, and the middle column member 40 and the upper column member 60 are joined. When the grout is injected into the gap V2, the periphery of the gap V1 is sealed with a joint member such as an air tube or a kneaded mortar to suppress the outflow of the grout.

(Upper column member)
Next, the configuration of the upper column member 60 will be described. As shown in FIG. 2, the upper pillar member 60 is placed on the upper part of the middle pillar member 40 and has the same cross-sectional shape as the lower pillar member 20 and the middle pillar member 40 in plan view.

  As shown in FIG. 2A, a sleeve 66 that opens to the lower surface 62 is provided on the lower surface 62 of the upper column member 60. The sleeve 66 is a cast iron joint member embedded in advance when the upper column member 60 is molded, and has an inner diameter D2 of about 43 mm, for example. A column main bar 44 protruding from the upper surface 48 of the middle column member 40 is inserted into the sleeve 66. A grout discharge hole (not shown) is formed in the upper portion of the sleeve 66, and the sleeve 66 and the outside of the upper column member 60 are communicated with each other.

  The sleeve 66 is an example of the second connection hole of the present invention. However, the configuration of the second connection hole is not limited to this, and a configuration in which a hole is formed in the lower surface 62 without using a sleeve is also possible. Good. In this embodiment, grout is continuously injected from the gap V2 to the sleeve 66. However, the embodiment of the present invention is not limited to this, and, for example, drops into the gap V2 from an injection hole provided in the upper portion of the sleeve 66. Thus, grout may be injected.

  A column main bar 64 is embedded in the upper column member 60, and a lower end portion of the column main bar 64 is inserted into the sleeve 66. As with the column main bars 24 and 44, the column main bars 64 are deformed reinforcing bars having a nominal diameter φ 3 of about 35 mm, and are provided along the outer periphery of the upper column member 60.

  The column main bars 64 are positioned coaxially with the column main bars 44 of the middle column member 40 when the axis M1 of the upper column member 60 and the axis M2 of the middle column member 40 coincide.

(Function and effect)
Next, the operation and effect of the column structure 10 according to the present embodiment will be described.

  In the column structure 10, the lower column member 20 is first constructed on the upper portion of the foundation beam 80, and then the flat slab 84 is installed on the lower column member 20.

  When constructing the lower column member 20, the lower column member 20 may be displaced from the original design position due to construction errors or the like. For example, the axis M3 of the lower column member 20 may deviate from the design position.

  As shown in FIG. 3A, in the column structure 10 according to the present embodiment, a sleeve 46 having an inner diameter D1 = 51 mm is provided in the middle column member 40, and the column main reinforcing bar 24 having a nominal diameter φ1 = 35 mm is provided in the sleeve 46. Has been inserted. For this reason, as shown in FIG. 3B, the axis M2 of the middle column member 40 is shifted from the axis M3 of the lower column member 20 by a maximum δ1 = {(D1−φ1) / 2} = 8 mm. be able to.

  Furthermore, in the column structure 10 according to the present embodiment, a sleeve 66 having an inner diameter D2 = 43 mm is provided on the upper column member 60, and a column main bar 44 having a nominal diameter φ2 = 35 mm is inserted into the sleeve 66. For this reason, the axis line M1 of the upper column member 60 can be shifted from the axis line M2 of the middle column member 40 by a maximum δ2 = {(D2−φ2) / 2} = 4 mm.

  When the allowable deviation amount δ1 with respect to the lower column member 20 of the middle column member 40 and the allowable deviation amount δ2 with respect to the middle column member 40 of the upper column member 60 are added, (δ1 + δ2) = 12 mm. That is, the upper column member 60 can be disposed at a position shifted by a maximum of 12 mm from the lower column member 20.

  Therefore, in the column structure 10 according to the present embodiment, the positional deviation of the lower column member 20 can be absorbed up to 12 mm.

  FIG. 4 shows an example of a correspondence relationship between a reinforcing bar and the inner diameter of a sleeve used as a joint for the reinforcing bar. The numbers described in the A column of the sleeve inner diameter for each reinforcing bar indicate the inner diameter of the sleeve that is normally used as a joint for the reinforcing bar. The inner diameter is such a dimension that a gap necessary for injecting an amount of grout that can fix the reinforcing bar and the sleeve between the reinforcing bar and the sleeve when the reinforcing bar is inserted into the sleeve is secured. In addition, the numbers described in the B row of the sleeve inner diameter indicate the maximum inner diameter of the sleeve that can be used as a joint for the reinforcing bar without any functional problem. Specifically, the inner diameter described in row B is two sizes larger than the inner diameter described in row A.

  The “gap necessary for grout injection” in the present invention is, as described above, “injecting an amount of grout that can fix the reinforcing bar and the sleeve between the reinforcing bar and the sleeve when the reinforcing bar is inserted into the sleeve. It means “the gap necessary to do”.

  Each sleeve shown in FIG. 4 is a product with the same specification. The sleeve used as the joint for the reinforcing bar is not limited to the product shown in FIG. 4, and a different product may be used. When different products are used, the inner diameters of the sleeves corresponding to the respective reinforcing bars are also different, so that the “gap necessary for grout injection” is also different.

  Based on FIG. 4, for example, a sleeve having an inner diameter of 43 mm is usually used as a joint for a reinforcing bar having a nominal diameter of 35 mm. In the present embodiment, the nominal diameter φ2 of the column main bar 44 is 35 mm, and the inner diameter D2 of the sleeve 66 into which the column main bar 44 is inserted is 43 mm.

  Moreover, as a sleeve used as a joint of a reinforcing bar having a nominal diameter of 35 mm, a sleeve having an inner diameter of 51 mm may be used. For example, in the present embodiment, the nominal diameter φ1 of the column main reinforcement 24 is 35 mm, and the inner diameter D1 of the sleeve 46 into which the column main reinforcement 24 is inserted is 51 mm.

  Thus, since the nominal diameter of the reinforcing bar is smaller than the inner diameter of the sleeve, a gap is formed between the sleeve and the reinforcing bar, but the gap width between the reinforcing bar and the sleeve does not need to be uniform. That is, the axis of the reinforcing bar and the axis of the sleeve do not have to coincide with each other. Therefore, by moving the reinforcing bar in the radial direction of the sleeve and adjusting the gap width between the reinforcing bar and the sleeve, the displacement of the reinforcing bar position can be absorbed.

  In the column structure 10 according to this embodiment, by providing two sleeves, that is, the sleeve 46 of the middle column member 40 and the sleeve 66 of the upper column member 60, it is possible to absorb misalignment at two locations.

  Further, since the sleeve 46 uses a sleeve having an inner diameter larger than that of a normally used sleeve, that is, a sleeve in which a gap larger than a gap necessary for grout injection for fixing the columnar muscles 24 is formed, the position shift is caused. The absorption cost of is large.

  Further, the middle pillar member 40 is placed on the upper part of the lower pillar member 20 in the vertical direction above the flat slab 84, and the upper pillar member 60 is placed on the upper part of the middle pillar member 40 in the lower vertical direction than the flat slab 86. Therefore, both the sleeve 46 and the sleeve 66 are disposed between the flat slab 84 and the flat slab 86. That is, a large misalignment can be absorbed within the vertical span of one layer of the building 100.

  The lower column member 20 and the middle column member 40 are temporarily fixed using a temporary plate (erection piece) after the middle column member 40 is placed on the lower column member 20. Similarly, the middle column member 40 and the upper column member 60 are also temporarily fixed using a temporary plate after the upper column member 60 is placed on the middle column member 40. Accordingly, it is possible to suppress the displacement of the middle column member 40 and the upper column member 60 from when the sleeve 46 and the sleeve 66 are filled with grout until the grout is cured.

[Second Embodiment]
Next, an example of the column structure 12 of the second embodiment will be described with reference to FIGS. 1 and 5. In addition, about the part which becomes the structure similar to 1st Embodiment, the same code | symbol is attached | subjected and description is abbreviate | omitted.

(Overall structure)
First, the entire structure of the column structure 12 according to the present embodiment will be described. As shown in FIG. 1, the column structure 12 according to the present embodiment includes a lower column member 30, a middle column member 50, and an upper column member 70 formed of precast concrete (hereinafter referred to as PCa). It is configured to include.

(Lower column member)
Next, the configuration of the lower column member 30 will be described. As shown in FIG. 5, the upper surface 32 of the lower column member 30 is provided with a sleeve 36 as an example of a third connection hole of the present invention that opens to the upper surface 32. In the sleeve 36, the column main reinforcement 34 of the lower column member 30 is inserted from the lower part, and the column main reinforcement 54 protruding from the lower surface 52 of the middle column member 50 is inserted from the upper part.

  A convex portion 38 is provided on the upper surface 32 of the lower pillar member 30, and a gap V <b> 3 is formed between the lower pillar member 30 and the middle pillar member 50 by the convex portion 38. By injecting grout into the gap V3, the sleeve 36 of the lower pillar member 30 is filled with grout, and the lower pillar member 30 and the middle pillar member 50 are joined. In this embodiment, grout is injected into the gap V3, but the embodiment of the present invention is not limited to this. For example, a grout injection hole may be formed in the lower portion of the sleeve 36, and the grout may be continuously injected from the grout injection hole to the sleeve 36 and the gap V3.

(Medium pillar member)
Next, the configuration of the middle column member 50 will be described. As shown in FIG. 5, a sleeve 56 is provided on the upper surface 58 of the middle pillar member 50 as an example of the fourth connection hole of the present invention that opens to the upper surface 58. A column main reinforcement 74 protruding from a lower surface 72 of an upper column member 70 described later is inserted into the sleeve 56 from above. Moreover, the column main reinforcement 54 as an example of the 3rd reinforcement of this invention is inserted from the lower part.

  A convex portion 59 is provided on the upper surface 58 of the middle pillar member 40, and a gap V <b> 4 is formed between the middle pillar member 50 and the upper pillar member 70 by the convex portion 59. By injecting grout into the gap V4, the grout is filled in the sleeve 56 of the middle column member 50, and the middle column member 50 and the upper column member 70 are joined. In this embodiment, grout is injected into the gap V4, but the embodiment of the present invention is not limited to this. For example, a grout injection hole may be formed in the lower portion of the sleeve 56, and the grout may be injected continuously from the grout injection hole to the sleeve 56 and the gap V4.

(Upper column member)
Next, the configuration of the upper column member 60 will be described. As shown in FIG. 5, an upper end portion of a column main bar 74 as an example of the fourth reinforcing bar of the upper column member 70 protrudes from a lower surface 72 of the upper column member 70, and a lower end portion of the column main bar 74 is a sleeve 56 of a middle column member. Has been inserted.

  The column structure 12 according to the second embodiment has been described above, but the configuration other than that described here is the same as that of the first embodiment. That is, the nominal diameter φ3 of the column main bar 34, the nominal diameter φ4 of the column main bar 54, and the nominal diameter φ5 of the column main bar 74 are the nominal diameter φ1 of the column main bar 24, the nominal diameter φ2 of the column main bar 44, and the nominal diameter of the column main bar 64, respectively. It is equal to φ3. The inner diameter D3 of the sleeve 36 and the inner diameter D4 of the sleeve 56 are equal to the inner diameter D1 of the sleeve 46 and the inner diameter D2 of the sleeve 66, respectively. Further, the mutual positional relationship among the column main bar 34, the column main bar 54, and the column main bar 74 is equal to the mutual positional relationship between the column main bar 24, the column main bar 44, and the column main bar 64. Furthermore, as shown in FIG. 1, the positional relationship of the lower pillar member 30, the middle pillar member 50, and the upper pillar member 70 with respect to the building 100, the flat slab 84, and the flat slab 86 is as follows. It is equal to the column member 60.

(Function and effect)
Next, the operation and effect of the column structure 12 according to the present embodiment will be described.

  Also in the column structure 12, similarly to the column structure 10 according to the first embodiment, two sleeves are provided. That is, by providing the sleeve 36 of the lower column member 30 and the sleeve 56 of the middle column member 50, it is possible to absorb misalignment at two locations.

  Further, as the sleeve 36, a sleeve having an inner diameter larger than that of a normally used sleeve, that is, a sleeve in which a gap larger than a gap necessary for grout injection for fixing the column main muscle 54 is used is used. The absorption cost of is large.

  Further, the middle pillar member 50 is placed on the upper part of the lower pillar member 30 in the vertical direction above the flat slab 84, and the upper pillar member 70 is placed on the upper part of the middle pillar member 50 in the lower vertical direction than the flat slab 86. Therefore, the sleeve 36 and the sleeve 56 are both disposed between the flat slab 84 and the flat slab 86. That is, a large misalignment can be absorbed within the vertical span of one layer of the building 100.

[Modification]
Next, a modification of the above embodiment will be described.

  In the first embodiment, only one middle pillar member 40 is provided, but the embodiment of the present invention is not limited to this. For example, a plurality may be provided. According to this, it is possible to further increase the lower-column misalignment absorption allowance. Similarly, a plurality of middle pillar members 50 in the second embodiment may be provided.

  In the first embodiment, the sleeve 66 is a sleeve that is normally used for connecting a reinforcing bar having a nominal diameter of 35 mm (inner diameter: 43 mm), and the sleeve 46 is a sleeve having an inner diameter larger than that of the sleeve that is normally used (inner diameter: 51 mm). However, the embodiment of the present invention is not limited to this. For example, the sleeve 66 may be a sleeve having an inner diameter larger than that of a normally used sleeve (for example, an inner diameter of 47 mm or 51 mm). Thereby, the absorption margin of the position shift of the lower pillar can be further increased. Similarly, the sleeve 56 of the second embodiment may be a sleeve having an inner diameter larger than that of a normally used sleeve.

  Alternatively, in the first embodiment, the sleeve 46 may be a commonly used sleeve (inner diameter: 43 mm). Even if the sleeve 46 is a sleeve that is normally used, in the column structure 10 of the first embodiment, since the sleeve is provided in two places in the vertical direction (the sleeve 46 and the sleeve 66), the displacement of the lower column is absorbed. Can do. Similarly, the sleeve 36 of the second embodiment may be a commonly used sleeve.

  In the first embodiment, the sleeve 46 is embedded in the middle column member 40 and the sleeve 66 is embedded in the upper column member 60. However, the embodiment of the present invention is not limited thereto. For example, a sleeve may be embedded in the lower column member 20 instead of the middle column member 40. In this case, no sleeve is embedded in the middle column member 40, and the column main reinforcement 44 protrudes from both the upper surface 48 and the lower surface 42. Alternatively, a sleeve may be embedded in the middle column member 40 instead of the upper column member 60. In this case, the sleeve is embedded in both the lower surface 42 and the upper surface 48 of the middle column member 40, and the column main bars 44 do not protrude from the middle column member 40. Also in these configurations, since the sleeve is provided at two positions in the vertical direction, it is possible to absorb the position shift of the lower column. Similarly, the middle column member 50 of the second embodiment may have a configuration in which a sleeve is embedded in both the upper surface 58 and the lower surface 52, or a configuration in which the column main bars 54 protrude from both the upper surface 58 and the lower surface 52. Also good.

  In the above embodiment, each reinforcing bar has a nominal diameter of 35 mm, but the embodiment of the present invention is not limited to this. For example, the nominal diameter of the reinforcing bar can be changed as appropriate depending on the size of the column and the required strength.

  Moreover, although the lower pillar member 20 and the lower pillar member 30 are constructed | assembled on the upper part of the foundation beam 80 in said embodiment, embodiment of this invention is not restricted to this. For example, the lower pillar member 20 and the lower pillar member 30 may be constructed on top of another pillar member.

  As described above, the present invention may be used in appropriate combination with the above-described embodiment and various modifications, and can of course be implemented in various modes without departing from the gist of the present invention.

10, 12 Column structure 20, 30 Lower column member 22, 32 Upper surface 24 Column main reinforcement (1st reinforcement)
36 Sleeve (third connection hole)
40, 50 Middle column member 42, 52 Lower surface 44 Column reinforcement (second reinforcing bar)
46 Sleeve (first connection hole)
48, 58 Top surface 54 Column main reinforcement (3rd reinforcement)
56 Sleeve (4th connection hole)
60, 70 Upper column member 62, 72 Lower surface 66 Sleeve (second connection hole)
74 Column reinforcement (4th reinforcement)

Claims (5)

A lower column member with a first reinforcing bar projecting from the upper surface;
A first connection hole whose height is less than the floor height, which is disposed between the upper and lower slabs, is placed on the upper part of the lower pillar member, and is inserted into the lower surface around the first rebar with a gap. Is formed, and the middle column member in which the second reinforcing bar protrudes from the upper surface,
An upper column member that is placed on the upper portion of the middle column member and has a second connection hole that is inserted on the lower surface around the second rebar with a gap;
Column structure with A lower column member having a third connection hole formed on the upper surface;
The height is less than the floor height, and is disposed between the upper and lower slabs and is placed on the upper portion of the lower pillar member, and is inserted with a gap from the lower surface to the inner peripheral wall of the third connection hole. A middle column member in which a third reinforcing bar protrudes and a fourth connection hole is formed on the upper surface;
An upper column member that is mounted on the upper portion of the middle column member and has a fourth reinforcing bar protruding from the lower surface and inserted between the inner peripheral wall of the fourth connection hole;
Column structure with At least one of the first connection hole and the second connection hole has a clearance of 6 mm or more for a reinforcing bar having a nominal diameter of 29 mm or less, a clearance of 7 mm or more for a reinforcing bar having a nominal diameter of 32 mm, and a nominal diameter of 35 mm. A clearance of 8 mm or more for reinforcing bars, a clearance of 9 mm or more for reinforcing bars with a nominal diameter of 38 mm, a clearance of 10 mm or more for reinforcing bars with a nominal diameter of 41 mm, and a clearance of 11 mm or more for reinforcing bars with a nominal diameter of 51 mm The column structure according to claim 1, wherein the column structure has a dimension to form a gap . At least one of the third connection hole and the fourth connection hole has a clearance of 6 mm or more for a reinforcing bar having a nominal diameter of 29 mm or less, a clearance of 7 mm or more for a reinforcing bar having a nominal diameter of 32 mm, and a nominal diameter of 35 mm. A clearance of 8 mm or more for reinforcing bars, a clearance of 9 mm or more for reinforcing bars with a nominal diameter of 38 mm, a clearance of 10 mm or more for reinforcing bars with a nominal diameter of 41 mm, and a clearance of 11 mm or more for reinforcing bars with a nominal diameter of 51 mm The pillar structure according to claim 2, wherein the pillar structure has a dimension in which a gap is formed.   The pillar structure according to any one of claims 1 to 4, wherein a convex portion is provided on an upper end surface of the lower pillar member and the middle pillar member.

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