JP7494424B2 - Column and beam positioning structure - Google Patents

Description

The present invention relates to a column-beam positioning structure.

Height adjustment members are known that are attached to brackets fixed to columns and adjust the height of beams (see, for example, Patent Document 1).

Known examples of metal fittings that can be fixed to columns include support fittings that join columns and beams (see, for example, Patent Document 2) and plumbing jigs that adjust the height of columns (see, for example, Patent Document 3).

JP 2003-268885 A JP 2004-250932 A Japanese Patent Application Laid-Open No. 10-204985

The height adjustment material disclosed in Patent Document 1 allows the height of the beam relative to the pillar to be adjusted, but it is difficult to position the beam horizontally relative to the pillar, which may reduce the ease of construction of the beam.

Taking the above facts into consideration, the present invention aims to easily position a beam horizontally relative to a column.

The column-beam positioning structure of the first aspect comprises a column to which a beam is joined, and a column-side guide member attached to the column, extending above an upper surface of the column, and engaging with a side surface of the beam.

According to the column-beam positioning structure of the first aspect , a beam is joined to a column. A column-side guide member is attached to the column. The column-side guide member extends upward beyond the top surface of the column. The beam is positioned relative to the column in the beam width direction (horizontal direction) by engaging a side surface of the beam with the column-side guide member. Therefore, the beam can be easily positioned relative to the column in the horizontal direction.

The column/beam positioning structure according to the second aspect is the column/beam positioning structure according to the first aspect , further comprising a pair of column side guide members attached to the columns with a gap between them in a plan view.

According to the column-beam positioning structure of the second aspect , the pair of column-side guide members are attached to the columns with a gap therebetween in a plan view. A beam is placed between the pair of column-side guide members, and a side surface of the beam is engaged with one of the column-side guide members, thereby positioning the beam in the beam width direction (horizontal direction) relative to the column.

By positioning the beam between a pair of adjacent column-side guide members in this way, the horizontal positioning accuracy of the beam relative to the column can be improved.

The column-beam positioning structure of the third aspect comprises a beam joined to a column, and a beam side guide member attached to the beam, extending downward below the lower surface of the beam, and engaging with the side surface of the column facing the beam.

According to the column-beam positioning structure of the third aspect , a beam is joined to a column. A beam-side guide member is attached to the beam. The beam-side guide member extends downward below the lower surface of the beam. The beam is positioned in the material axis direction (horizontal direction) by engaging the beam-side guide member with the side surface of the column on the beam side. Therefore, the beam can be easily positioned in the horizontal direction relative to the column.

The column-beam positioning structure of the fourth aspect is the column-beam positioning structure of any one of the first to third aspects , further comprising a beam support portion provided on the column and on which the beam end portion of the beam is placed.

According to the fourth aspect of the column-beam positioning structure, the column is provided with a beam receiving portion. By placing the beam end of the beam on this beam receiving portion, the beam is positioned in the vertical direction relative to the column. This makes it even easier to position the beam relative to the column.

In addition, by providing beam supports on the columns, it is possible to omit shoring and other structures to support the beams. This improves the ease of construction of the beams.

As described above, the present invention makes it easy to position a beam horizontally relative to a column.

1 is a plan view showing a pair of full precast beams and a pair of half precast beams to which a column-beam positioning structure according to one embodiment is applied. FIG. This is a cross-sectional view taken along line 2-2 of Figure 1. This is a cross-sectional view taken along line 3-3 in Figure 1. FIG. 3 is an exploded elevational view showing the precast column, the beam support bracket, and the column side guide member shown in FIG. 2. FIG. 2 is an elevation view illustrating a construction method for the full precast beam shown in FIG. 1 . 13A and 13B are cross-sectional views showing modified examples of the column side guide member in one embodiment. FIG. 2 is a plan view showing a precast column and a full precast beam to which a column-beam positioning structure according to one embodiment is applied. FIG. 2 is a plan view showing a precast column and a full precast beam to which a column-beam positioning structure according to one embodiment is applied. FIG. 1 is an elevation view showing a precast column and a full precast beam to which a column-beam positioning structure according to one embodiment is applied. FIG. 1 is an elevation view showing a precast column and a full precast beam to which a column-beam positioning structure according to one embodiment is applied.

Below, we will explain the column-beam positioning structure according to one embodiment with reference to the drawings.

As shown in Figures 1, 2, and 3, the column-beam positioning structure of this embodiment includes a precast column 10 (see Figure 2), a pair of full precast beams 20, a pair of half precast beams 40, multiple beam support brackets 70, and multiple column-side guide members 80.

The precast column 10 is an example of a column, and the full precast beam 20 and the half precast beam 40 are examples of beams. The beam support bracket 70 is an example of a beam support portion, and the column side guide member 80 is an example of a guide member.

(Precast columns)
As shown in Figures 2 and 3, the precast column 10 is made of precast concrete. The cross-sectional shape of the precast column 10 is rectangular. A plurality of column main reinforcements 12 are embedded in the outer periphery of the precast column 10. The cross-sectional shape of the precast column 10 can be changed as appropriate.

The multiple column main reinforcements 12 are arranged along the material axis direction of the precast column 10. The multiple column main reinforcements 12 are also arranged at intervals in the circumferential direction of the precast column 10. The upper ends of these column main reinforcements 12 protrude upward from the outer periphery of the upper surface 10U of the precast column 10. The upper surface 10U of the precast column 10 is formed in a rectangular shape in a plan view.

(Full precast beams)
As shown in Fig. 2, the full precast beam 20 is made of precast concrete. The full precast beam 20 is made of ordinary concrete. The cross-sectional shape of the full precast beam 20 is rectangular. The beam end of the full precast beam 20 is placed on a beam support bracket 70, which will be described later.

The full precast beam 20 has multiple lower end beam main bars 22, multiple upper end beam main bars 24, and multiple shear reinforcement bars 26 embedded in it. The lower end beam main bars 22 and the upper end beam main bars 24 are examples of beam main bars.

The multiple lower end beam main reinforcements 22 and upper end beam main reinforcements 24 are embedded along the material axis direction of the full precast beam 20. The multiple lower end beam main reinforcements 22 are embedded on the lower end side of the full precast beam 20. The multiple lower end beam main reinforcements 22 are also arranged at intervals in the beam width direction of the full precast beam 20. One end side of these lower end beam main reinforcements 22 protrudes from the end face 20A of the full precast beam 20.

The multiple upper end beam main reinforcements 24 are embedded in the upper end of the full precast beam 20. The multiple upper end beam main reinforcements 24 are also arranged at intervals in the beam width direction of the full precast beam 20. One end side of these upper end beam main reinforcements 24 protrudes from the end face 20A of the full precast beam 20.

An anchor 28 is provided at one end (tip) of each of the lower end beam main reinforcement 22 and the upper end beam main reinforcement 24. The anchor 28 is, for example, a mechanically fixed plate nut or the like, and is embedded in the cast-in-place concrete 16 (column-beam joint 18) described below.

(Half precast beam)
3, the half precast beam 40 is formed of half precast concrete. The half precast beam 40 forms a beam 60 together with a top concrete 58 poured thereon.

The beam 60 is made of ordinary concrete. The cross-sectional shape of the beam 60 (half precast beam 40) is rectangular. The end of the beam 60 is placed on the beam support bracket 70, which will be described later.

A plurality of lower end beam main bars 42, a plurality of upper end beam main bars 44, and a plurality of shear reinforcement bars 46 are embedded in the beam 60. The lower end beam main bars 42 and the upper end beam main bars 44 are examples of beam main bars.

The multiple lower end beam main bars 42 and upper end beam main bars 44 are arranged along the material axis direction of the beam 60. The multiple lower end beam main bars 42 are embedded in the lower end side of the beam 60, i.e., the lower end side of the half precast beam 40. These lower end beam main bars 42 are arranged at intervals in the beam width direction of the half precast beam 40. One end side of each lower end beam main bar 42 protrudes from the end face 40A of the half precast beam 40.

The multiple upper end beam main reinforcements 44 are embedded in the upper end side of the beam 60, i.e., in the top concrete 58. The multiple upper end beam main reinforcements 44 are also arranged on the upper surface 40U of the half precast beam 40 at intervals in the beam width direction of the half precast beam 40. These upper end beam main reinforcements 44 are held by multiple shear reinforcement bars 46 protruding from the upper surface 40U of the half precast beam 40.

One end of the upper end beam main reinforcement 44 protrudes from the end face 40A of the half precast beam 40 in plan view. Here, the upper end beam main reinforcement 44 has two beam main reinforcements 44A, 44B and a mechanical joint 44C that connects the two beam main reinforcements 44A, 44B.

The mechanical joint 44C is positioned so that it does not protrude from the end surface 40A of the half precast beam 40 in plan view. The beam main reinforcement bars 44A and 44B are connected to this mechanical joint 44C. The beam main reinforcement bars 44A protrude from the end surface 40A of the half precast beam 40 in plan view.

An anchor 48 is provided at one end (tip) of each of the lower end beam main reinforcement 42 and the upper end beam main reinforcement 44. The anchor 48 is, for example, a mechanically fixed plate nut or the like, and is embedded in the cast-in-place concrete 16 described below.

(Column-beam joint)
As shown in Fig. 2, the pair of full precast beams 20 are arranged with their end faces 20A facing each other. The pair of full precast beams 20 are also arranged with their lower end beam main reinforcements 22 facing each other (closely facing each other) and their upper end beam main reinforcements 24 facing each other (closely facing each other).

Similarly, as shown in FIG. 3, a pair of half precast beams 40 are arranged with their end faces 40A facing each other. Also, a pair of half precast beams 40 are arranged with their lower end beam main reinforcements 42 facing each other (closely facing each other) and their upper end beam main reinforcements 44 facing each other (closely facing each other).

As shown in FIG. 1, a pair of full precast beams 20 and a pair of half precast beams 40 are arranged so as to cross each other. Then, cast-in-place concrete 16 is poured into the space 14 surrounded by the beam ends of the full precast beams 20 and the half precast beams 40. This forms a beam-column joint 18.

The cast-in-place concrete 16 is fiber-reinforced concrete. In this embodiment, the fiber-reinforced concrete is concrete that contains, for example, steel fibers, glass fibers, carbon fibers, organic fibers, etc. Cast-in-place concrete 16 is an example of concrete.

(Beam support bracket)
As shown in Fig. 4, a pair of beam support brackets 70 are detachably attached to each side surface 10S of the upper portion of the precast column 10. The pair of beam support brackets 70 are formed in a substantially triangular shape in a side view. Each beam support bracket 70 has an attachment portion 72, a support portion 74, and a connecting portion 76.

The mounting portion 72, receiving portion 74, and connecting portion 76 are formed from shaped steel such as L-shaped steel or C-shaped steel. The mounting portion 72 is arranged in the vertical direction on the side surface 10S of the precast column 10, and is removably attached to the side surface 10S of the precast column 10 by a bolt 78. A nut member 79 to which the bolt 78 is fastened is embedded in the side surface 10S of the precast column 10.

The mounting portion 72 is positioned so that it does not protrude upward from the upper surface 10U of the precast column 10. From the upper end of this mounting portion 72, a receiving portion 74 extends approximately horizontally to the outside of the precast column 10. This receiving portion 74 and the mounting portion 72 are connected by a brace-shaped connecting portion 76.

Here, when the full precast beam 20 and the half precast beam 40 are constructed, the beam end of the full precast beam 20 or the half precast beam 40 is temporarily placed (tentatively placed) on the receiving portion 74. This positions the full precast beam 20 or the half precast beam 40 in the vertical direction relative to the precast column 10.

The upper surface of the receiving portion 74 of the beam support bracket 70 does not have to be flush with the upper surface 10U of the precast column 10, but may be located above or below the upper surface 10U of the precast column 10. The shape, location, and number of the beam support bracket 70 can be changed as appropriate.

(Column side guide member)
As shown in Fig. 1, a pair of column-side guide members 80 are detachably attached to each side surface of the upper portion of the precast column 10. The pair of column-side guide members 80 are formed of shaped steel such as L-shaped steel. The pair of column-side guide members 80 are attached to the precast column 10 with a gap therebetween in a plan view. More specifically, the pair of column-side guide members 80 are arranged along the up-down direction on both sides in the width direction of the side surface 10S of the precast column 10.

The pair of column-side guide members 80 are arranged on both sides of the pair of beam-support brackets 70. In other words, the pair of beam-support brackets 70 are arranged between the pair of column-side guide members 80.

The column-side guide member 80 is bent into an L-shape in plan view. As shown in FIG. 4, the column-side guide member 80 has an attachment portion 82 and a guide portion 84. The attachment portion 82 is removably attached to the side surface 10S of the precast column 10 by a bolt 88 while being superimposed on the side surface 10S of the precast column 10. A nut member 89 to which the bolt 88 is fastened is embedded in the side surface 10S of the precast column 10.

The guide portion 84 extends from the mounting portion 82 in a rib-like manner to the outside of the precast column 10. The upper portion of this guide portion 84 extends above the upper surface 10U of the precast column 10. In addition, the pair of column-side guide members 80 have guide surfaces 84G with which the side surfaces 20S, 40S (see Figure 1) of the full precast beam 20 or half precast beam 40 engage.

As shown in FIG. 5, a pair of column-side guide members 80 are attached to the precast column 10 with their respective guide surfaces 84G facing each other in the beam width direction (arrow W). A full precast beam 20 or half precast beam 40 (see FIG. 1) is inserted between the pair of guide surfaces 84G. In this state, the side surfaces 20S, 40S of the full precast beam 20 or half precast beam 40 are engaged (in surface contact) with the guide surface 84G of one of the column-side guide members 80. This positions the full precast beam 20 or half precast beam 40 in the beam width direction (horizontal direction) relative to the precast column 10.

In addition, there may be a gap between the pair of guide surfaces 84G and the side surfaces 20S, 40S on both sides of the full precast beam 20 or half precast beam 40 to absorb construction errors.

(Construction method for column-beam positioning structure)
Next, an example of a construction method for a column-beam positioning structure will be described.

First, as shown in FIG. 4, a pair of beam support brackets 70 are removably attached to each side surface 10S of the precast column 10 by bolts 78, and a pair of column side guide members 80 are removably attached by bolts 88.

The beam support bracket 70 and the column side guide member 80 may be attached to the precast column 10 before the precast column 10 is erected, or may be attached to the precast column 10 after the precast column 10 is erected.

Next, as shown in FIG. 3, the pair of half precast beams 40 are lifted in sequence by a crane or the like (not shown), and the beam ends of the pair of half precast beams 40 are placed on the receiving portions 74 of the beam receiving brackets 70 from above the precast column 10. This positions the pair of half precast beams 40 in the vertical direction relative to the precast column 10.

At this time, the beam end of the half precast beam 40 is not positioned on the upper surface 10U of the precast column 10. In addition, the beam end of the half precast beam 40 is dropped between a pair of column side guide members 80, and the side surface 40S of the half precast beam 40 is engaged with the guide surface 84G (see Figure 5) of one of the column side guide members 80. This positions the half precast beam 40 in the beam width direction (horizontal direction) relative to the precast column 10.

The mechanical joints 44C of the upper end main beam bars 44 of the half precast beam 40 are not connected to the main beam bars 44B.

Next, as shown in FIG. 2, a pair of full precast beams 20 (see FIG. 2) are lifted in sequence by a crane (not shown), and the beam ends of the pair of full precast beams 20 are placed on the receiving portions 74 of the beam receiving brackets 70 from above the precast columns 10. This positions the pair of full precast beams 20 in the vertical direction relative to the precast columns 10.

At this time, as shown in FIG. 5, the beam end of the full precast beam 20 is dropped between a pair of column side guide members 80, and the side surface 20S of the full precast beam 20 is engaged with the guide surface 84G of one of the column side guide members 80. This positions the full precast beam 20 in the beam width direction (horizontal direction) relative to the precast column 10.

As mentioned above, the mechanical joints 44C of the upper end main beam reinforcement 44 of each half precast beam 40 are not connected to the main beam reinforcement 44B. Therefore, the lower end main beam reinforcement 22 of the full precast beam 20 is prevented from interfering with the upper end main beam reinforcement 44 of the half precast beam 40.

Next, as shown in FIG. 3, the beam main bars 44B are connected to the mechanical joints 44C of each upper end beam main bar 44 of the half precast beam 40.

Next, as shown in FIG. 1, the gaps between adjacent column-side guide members 80 are sealed with formwork or the like (not shown). Alternatively, multiple column-side guide members 80 are removed from the precast columns 10, and the gaps between the beam ends of adjacent full precast beams 20 and half precast beams 40 are sealed with formwork or the like (not shown).

Next, a formwork (not shown) is temporarily set up on the half precast beam 40. Next, cast-in-place concrete (fiber-reinforced concrete) 16 is poured into the space 14 surrounded by the beam ends of the pair of full precast beams 20 and the pair of half precast beams 40. This forms the beam-column joint 18.

Also, as shown in FIG. 3, top concrete (ordinary concrete) 58 is poured on top of the pair of half precast beams 40 to form beams 60.

Then, remove the beam support bracket 70 and the column side guide member 80.

The beam support bracket 70 and the column side guide member 80 may be left in place and not removed. Also, the full precast beam 20 or half precast beam 40 may be inserted between a pair of column side guide members 80 from the side, rather than being dropped between them from above. Also, the order of the above construction steps (procedures) may be changed as appropriate depending on the situation.

(effect)
Next, the effects of this embodiment will be described.

According to the column-beam positioning structure of this embodiment, a pair of beam support brackets 70 are removably attached to each side surface 10S of the precast column 10. By placing the beam end portion of the full precast beam 20 or half precast beam 40 on the support portions 74 of the pair of beam support brackets 70, the full precast beam 20 or half precast beam 40 is positioned in the vertical direction relative to the precast column 10.

A pair of column-side guide members 80 are removably attached to each side surface 10S of the precast column 10. Then, the full precast beam 20 or half precast beam 40 is positioned in the width direction of the precast column 10 by engaging the side surfaces 20S, 40S of the full precast beam 20 or half precast beam 40 with the guide surface 84G of one of the column-side guide members 80.

In this embodiment, by attaching a pair of beam support brackets 70 and a pair of column side guide members 80 to each side surface 10S of the precast column 10, the full precast beam 20 and the half precast beam 40 can be easily positioned in the vertical and horizontal directions. This improves the ease of construction of the full precast beam 20 and the half precast beam 40.

The pair of column-side guide members 80 are attached to the precast column 10 with a gap between them in a plan view. A full precast beam 20 or half precast beam 40 is placed between the pair of column-side guide members 80, and the side surfaces 20S, 40S of the full precast beam 20 or half precast beam 40 are engaged with the guide surface 84G of one of the column-side guide members 80. This positions the full precast beam 20 or half precast beam 40 in the beam width direction relative to the precast column 10.

Therefore, in this embodiment, the positioning accuracy in the beam width direction of the full precast beam 20 or half precast beam 40 can be improved compared to, for example, a case in which a single column side guide member 80 is attached to the side surface 10S of the precast column 10.

The column-side guide member 80 also functions as a formwork for the cast-in-place concrete 16. This improves the workability of the cast-in-place concrete 16 (column-beam joint 18).

Furthermore, in this embodiment, by supporting the beam end of the full precast beam 20 or half precast beam 40 with a beam support bracket 70 attached to the precast column 10, it is possible to omit supports and the like for supporting the full precast beam 20 or half precast beam 40. Therefore, the workability of the full precast beam 20 and half precast beam 40 is further improved.

In addition, the beam support bracket 70 and the column side guide member 80 are removably attached to the precast column 10. Therefore, the beam support bracket 70 and the column side guide member 80 can be reused, which reduces costs.

In addition, anchors 28, 48 are provided at the tips of the lower end beam main bars 22, 42 and the upper end beam main bars 24, 44 of the full precast beam 20 and half precast beam 40, respectively, to be embedded in the cast-in-place concrete 16. In addition, the cast-in-place concrete 16 is made of fiber-reinforced concrete. This increases the joint strength between the lower end beam main bars 22, 42 and the upper end beam main bars 24, 44 and the cast-in-place concrete 16.

Therefore, in this embodiment, the mechanical joints connecting the lower end beam main bars 22 of a pair of full precast beams 20 and the mechanical joints connecting the upper end beam main bars 24 can be omitted. Similarly, the mechanical joints connecting the lower end beam main bars 42 of a pair of half precast beams 40 and the mechanical joints connecting the upper end beam main bars 44 can be omitted. Therefore, the workability of the column-beam joint section 18 is improved.

As mentioned above, the cast-in-place concrete 16 is fiber-reinforced concrete. This increases the splitting strength of the beam-column joint 18, making it possible to omit the need for shear reinforcement bars embedded in the beam-column joint 18. This simplifies the structure of the beam-column joint 18, further improving the ease of construction of the beam-column joint 18.

In order to omit the need to embed shear reinforcement in the beam-column joint 18, it is desirable to form the entire beam-column joint 18, or nearly the entire joint, from fiber-reinforced concrete.

As a comparative example, for example, it is possible to support the beam end of the full precast beam 20 with the upper surface 10U of the precast column 10, and omit the beam support bracket 70.

However, in this embodiment, the full precast beam 20 is made of ordinary concrete. Therefore, when the end of the full precast beam 20 is placed on the upper surface 10U of the precast column 10, the beam-column joint 18 is partially made of ordinary concrete, which may reduce the splitting strength of the beam-column joint 18.

As a countermeasure, for example, it is possible to form only the beam end of the full precast beam 20, which is placed on the upper surface 10U of the precast column 10, from fiber-reinforced concrete, and to form the other parts from ordinary concrete. In this case, however, it is necessary to pour fiber-reinforced concrete and ordinary concrete separately for the beam end of the full precast beam 20 and the other parts, which makes the production of the full precast beam 20 time-consuming.

In contrast, in this embodiment, the beam end of the full precast beam 20 is supported by a beam support bracket 70, so that the entire beam-column joint 18 can be formed from fiber-reinforced concrete. This ensures the splitting strength, etc., of the beam-column joint 18.

(Modification)
Next, a modification of the above embodiment will be described.

In the modified example shown in FIG. 6(A), the column side guide member 90 is bent in a Z-shape (crank shape) in a plan view. Specifically, the column side guide member 90 has an attachment portion 92 and a guide portion 94.

The mounting portion 92 is bent in an L-shape. The mounting portion 92 is arranged along the corner of the precast column 10 and is removably attached to the precast column 10 by a bolt 88. The guide portion 94 has a guide surface 94G and extends from the mounting portion 92 to the outside of the precast column 10 in a rib-like manner.

Here, the mounting parts 92 of the adjacent column side guide members 90 are attached in an overlapping state to the corners of the precast columns 10. This prevents the poured-in-place concrete 16 from leaking from the corners of the precast columns 10 when pouring the poured-in-place concrete 16. This makes it possible to omit temporary formwork or the like at the corners of the precast columns 10, improving workability.

In the modified example shown in FIG. 6(B), the column side guide member 100 is bent in a W-shape in plan view. Specifically, the column side guide member 100 has an attachment portion 102 and a pair of guide portions 104.

The mounting portion 102 is bent in an L-shape and is removably attached to the precast column 10 by a bolt 88 while being positioned along the corner of the precast column 10. The pair of guide portions 104 have guide surfaces 104G and extend in a rib-like manner from both sides of the mounting portion 102 in the width direction to the outside of the precast column 10.

Here, the mounting portion 102 of the column-side guide member 100 is arranged along the corner of the precast column 10. This prevents the poured-in-place concrete 16 from leaking from the corner of the precast column 10 when pouring the poured-in-place concrete 16. This makes it possible to omit temporary formwork or the like at the corner of the precast column 10, improving workability.

The column side guide member 100 also has a pair of guide portions 104. As a result, in this modified example, the number of column side guide members 100 is reduced compared to the above embodiment. This reduces the effort required to attach the column side guide members 100 to the precast column 10.

Next, in the above embodiment, a column-side guide member 80 is attached to the precast column 10. However, the guide member can be provided on at least one of the precast column 10 and the precast beam (full precast beam 20, half precast beam 40).

For example, in the modified example shown in FIG. 7, a column-side guide member 110 is removably attached to a precast column 10, and a beam-side guide member 120 is removably attached to a full precast beam 20. The column-side guide member 110 and the beam-side guide member 120 are examples of guide members.

The column side guide member 110 is formed in a cross shape in a plan view. This column side guide member 110 has an attachment portion 112 and a pair of guide portions 114. The attachment portion 112 is bent into an L shape and is detachably attached to the precast column 10 by a bolt 88 while being arranged along the corner of the precast column 10. The outer surface of the attachment portion 112 is a guide surface 114G. The pair of guide portions 114 have guide surfaces 114G and each extend in a rib-like manner from the bent portion of the attachment portion 112 to the outside of the precast column 10.

The beam side guide member 120 is bent into an L-shape in plan view. This beam side guide member 120 has an attachment portion 122 and a guide portion 124. The attachment portion 122 is removably attached to the side surface 20S of the full precast beam 20 by a bolt 128 while being overlapped on the side surface 20S of the full precast beam 20. In addition, a nut member 129 to which the bolt 128 is fastened is embedded in the side surface 20S of the full precast beam 20.

The guide portion 124 extends in a rib-like manner from the mounting portion 112 to the outside of the full precast beam 20. The tip portion 124T of this guide portion 124 engages with the guide surface 114G of the column side guide member 110. This positions the full precast beam 20 in the beam width direction relative to the precast column 10.

The surface of the guide portion 124 facing the precast column 10 is designated as the guide surface 124G. This guide surface 124G engages with the guide surface 114G of the mounting portion 112 of the column side guide member 110. This positions the full precast beam 20 in the material axis direction (arrow X direction).

In this manner, in the modified example shown in Figure 7, the full precast beam 20 can be positioned in the beam width direction and material axis direction relative to the precast column 10.

Next, in the modified example shown in Figures 8 and 9, a column-side guide member 80 is removably attached to the precast column 10, and a beam-side guide member 140 is removably attached to the full precast beam 20. Note that the beam-side guide member 140 is an example of a guide member.

The column side guide member 80 is positioned on one side of the full precast beam 20 in the beam width direction. The guide surface 84G of this column side guide member 80 engages (is in surface contact with) the side surface 20S on one side of the full precast beam 20. This positions the full precast beam 20 in the beam width direction relative to the precast column 10.

The beam side guide member 140 is disposed on the other side of the full precast beam 20 in the beam width direction. The beam side guide member 140 is bent in an L-shape in plan view. The beam side guide member 140 has an attachment portion 142 and a guide portion 144.

The mounting portion 142 is removably attached to the side surface 20S of the full precast beam 20 by bolts 128 while overlapping the side surface 20S of the full precast beam 20. The guide portion 144 extends from the mounting portion 142 to the outside of the full precast beam 20 in a rib shape. The surface of this guide portion 144 facing the precast column 10 is the guide surface 144G.

Here, as shown in FIG. 9, the lower part of the beam side guide member 140 extends downward below the lower surface 20L of the full precast beam 20. The guide surface 144G of the lower part of this beam side guide member 140 engages with the side surface 10S of the precast column 10 on the full precast beam 20 side. This positions the full precast beam 20 in the material axis direction (arrow X direction) relative to the precast column 10.

In this manner, in the modified example shown in Figures 8 and 9, the full precast beam 20 can be positioned in the beam width direction and material axis direction (horizontal direction) relative to the precast column 10.

The guide members (column-side guide members and beam-side guide members) must be capable of positioning the beam relative to the column in at least one of the beam width direction and material axis direction.

Next, in the modified example shown in FIG. 10, a protruding portion 130 is provided on the precast column 10. The protruding portion 130 is formed integrally with the precast column 10 by precast concrete. The protruding portion 130 protrudes outward from the precast column 10. For example, the beam end of a half precast beam 40 or a full precast beam 20 (see FIG. 1) is placed on the upper surface (receiving surface) 130U of this protruding portion 130. This positions the half precast beam 40 or the full precast beam 20 in the vertical direction.

In this way, it is possible to form the overhanging portion 130 integrally with the precast column 10. The overhanging portion 130 is an example of a beam support portion.

Next, in the above embodiment, the beam ends of the full precast beam 20 and the half precast beam 40 are not positioned on the upper surface 10U of the precast column 10. However, the beam ends of the full precast beam 20 and the half precast beam 40 may be positioned on the upper surface 10U of the precast column 10.

In addition, in the above embodiment, the upper end main beam reinforcement 44 of the half precast beam 40 is arranged below the upper end main beam reinforcement 24 of the full precast beam 20. However, the upper end main beam reinforcement 44 of the half precast beam 40 may be arranged above the upper end main beam reinforcement 24 of the full precast beam 20. In this case, the main beam reinforcement 44B can be connected to the mechanical joint 44C of the half precast beam 40 above the upper end main beam reinforcement 24 of the full precast beam 20, improving workability.

In addition, in the above embodiment, the lower end beam main reinforcements 22 and the upper end beam main reinforcements 24 of a pair of full precast beams 20 are not connected to each other. However, the lower end beam main reinforcements 22 and the upper end beam main reinforcements 24 of a pair of full precast beams 20 may be connected to each other by mechanical joints or lap joints. Similarly, the lower end beam main reinforcements 42 and the upper end beam main reinforcements 44 of a pair of half precast beams 40 may be connected to each other by mechanical joints or lap joints.

In addition, in the above embodiment, the cast-in-place concrete 16 is fiber-reinforced concrete. However, the cast-in-place concrete 16 may be ordinary concrete.

In the above embodiment, a pair of full precast beams 20 and a pair of half precast beams 40 are joined to the precast column 10. However, four full precast beams or four half precast beams may be joined to the precast column 10. Furthermore, two or three precast beams may be joined to the precast column. Note that the concept of a precast beam includes full precast beams and half precast beams.

In the above embodiment, the columns are precast columns 10. However, the columns are not limited to precast concrete and may be made of cast-in-place concrete.

In addition, the columns and beams are not limited to being made of reinforced concrete, but may be made of steel-reinforced concrete or steel.

Although one embodiment of the present invention has been described above, the present invention is not limited to this embodiment, and one embodiment and various modified examples may be used in appropriate combination, and the present invention may of course be embodied in various forms without departing from the spirit of the present invention.

10 Precast columns (pillars)
10U Top 20 Full precast beam (beam)
20L Bottom 20S Side 40 Half precast beam (beam)
40S Side 70 Beam support bracket (beam support part)
80 Pillar side guide member 90 Pillar side guide member 100 Pillar side guide member 110 Pillar side guide member 120 Beam side guide member 130 Overhanging portion (beam support portion)

Claims (4)

A column to which the beam is joined;
a column-side guide member formed of a bent member, the lower end side of which is attached in a state of being overlapped on the side surface of the column, the upper end side of which extends above the upper surface of the column along the side surface of the column, and the side surface of the beam is engaged with the column-side guide member;
Equipped with
Column and beam positioning structure. A pair of the column side guide members are attached to the column with a gap therebetween in a plan view.
The column-beam positioning structure according to claim 1 . A beam connected to the column;
a beam side guide member attached to the beam, extending downward below a lower surface of the beam, and engaging with a side surface of the column on the beam side;
The column-beam positioning structure according to claim 1 or 2. The column includes a beam receiving portion on which the beam end of the beam is placed.
A column-beam positioning structure according to any one of claims 1 to 3.