JP2007247276A - Pressure joining structure and pressure joining construction method for precast concrete beam and column - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pressure joining structure and a pressure joining construction method for a precast concrete beam 1 and a column 2 of excellent economical efficiency and safety requiring no temporary work scaffolding (a) at all by allowing anchoring work of a PC steel member 3 to be performed from the inside of a building even when pressure-joining the precast concrete beam 1 to the column 2 at the outer peripheral part of the building. <P>SOLUTION: In the joining structure for pressure-joining the precast concrete beam 1 to the column 2, the precast concrete beam 1 is provided with stepped parts 11 comprising anchor faces facing the side face of the column 2, at both side faces, and one end of the PC steel member 3 is anchored to the stepped part 11 of the precast concrete beam 1, while the other end passes through the inside of the beam 1 and column 2 and is turned around in a horizontal or vertical direction and tension-anchored to the stepped part 11 provided at the same or another precast concrete beam to pressure-join the precast concrete beam 1 to the column 2. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a technique of a pressure bonding structure and a pressure bonding structure method in which a precast concrete beam is pressure bonded to a column (including a precast concrete column, a reinforced concrete column or a steel reinforced concrete column formed by on-site casting, and the same applies hereinafter). Belonging to the field.

  Various techniques relating to a pressure-bonding structure and a pressure-bonding construction method in which a precast concrete beam is pressure-bonded to a column have been disclosed (see, for example, Patent Documents 1 to 5).

  Conventionally, in order to pressure-bond a precast concrete beam to a column on the outer periphery of a building, as shown in FIG. 5, the precast concrete beam 1 is abutted against the side surface of the column 2 and is installed between adjacent columns 2 and 2. The PC steel material 3 was tensioned in a straight line over the sheath provided horizontally in the material axis direction of the beam 1 and the sheath provided on the column 2 continuous therewith, and was fixed by the fixing tool 4. Therefore, since it is necessary for an operator to perform the work for arranging the PC steel material 3 and its fixing tool 4 and the tension work of the PC steel material 3 from the outside of the building, some temporary work scaffold a is required outside the building. .

Japanese Patent Application Laid-Open No. 7-252884 Japanese Patent Laid-Open No. 11-131588 JP 2000-73448 A JP 2002-371634 A JP 2004-316322 A

  According to the conventional construction method, in order to pressure-bond the pillar 2 and the precast concrete beam 1 on the outer periphery of the building, it is necessary to assemble a temporary work scaffold a outside the building as described above. In particular, when constructing a medium- and high-rise building, it is necessary to construct a jumping scaffold and the like, and the cost and construction period associated with the construction of the temporary work scaffold a are increased, which is not economical. Moreover, it is clear that work from outside the building is inferior in terms of safety compared to work from inside the building.

  The object of the present invention is to provide a temporary work scaffold a by realizing that the fixing work of the PC steel material 3 can be performed from the inside of the building even when the column 2 on the outer periphery of the building and the precast concrete beam 1 are bonded by pressure bonding. An object of the present invention is to provide a pressure-bonding structure and a pressure-bonding structure for a precast concrete beam 1 and a column 2 which are completely unnecessary, and are very excellent in economy and safety.

As a means for solving the above-mentioned problems of the prior art, the precast concrete beam and column pressure bonding structure according to the invention described in claim 1 is:
In a joint structure consisting of precast concrete beams joined to a column by pressure bonding,
Precast concrete beams are provided with stepped portions on both side surfaces with fixing surfaces facing the side surfaces of the columns,
One end of the PC steel material is fixed to the step portion of the precast concrete beam, and the other end is folded back horizontally or vertically through the inside of the beam and the column to be the same or different precast concrete beams. The precast concrete beam is pressure-bonded to the column by being tensioned and fixed to the provided step portion.

The pre-cast concrete beam and column pressure bonding construction method according to the invention described in claim 2 is:
In the joint construction method in which precast concrete beams are crimped to columns,
The column is provided with a sheath that is U-turned in the horizontal cross section and opens to one side surface, and the beam is provided with a sheath arranged along the both side surfaces so as to coincide with the opening of the column sheath. Provided to open to the step provided in
The end of the beam is brought into contact with the side surface of the column so that the respective sheath openings coincide with each other, and the PC steel material is tensioned through a U-shape from the beam step to the sheath provided on the beam and the column. It is characterized in that it is fixed to a precast concrete beam and bonded to a column by pressure bonding.

The precast concrete beam and column pressure bonding construction method according to the invention described in claim 3 is:
In the joint construction method in which precast concrete beams are crimped to columns,
A sheath that opens to one side of each column through the horizontal cross section is provided in parallel between adjacent columns and the beam installed between them, and the precast concrete beam has a sheath of the column along both side surfaces thereof. A sheath arranged to match the opening is provided so as to open in a step provided in the direction of the material axis of the beam,
The ends of the precast concrete beams are brought into contact with the side surfaces of the adjacent columns so that the respective sheath openings coincide with each other, and the PC steel material is horizontally U-shaped from the beam step to the sheath provided on the beam and the column. It is characterized by tensioning through the shape, fixing to the stepped portion, and pressure bonding the precast concrete beam to the column.

The pre-cast concrete beam and column pressure bonding construction method according to the invention described in claim 4 is:
In the joint construction method in which precast concrete beams are crimped to columns,
The column is provided with a sheath that opens in the vertical direction at the contact portion of the upper and lower beams on the side surface, and the beam has a sheath arranged so as to coincide with the opening of the column sheath along both side surfaces. Provided to open to the step provided in the material axis direction of
The ends of the upper and lower beams are brought into contact with the side surfaces of the columns so that the respective sheath openings coincide with each other, and the PC steel material is vertically passed through the sheath provided on the beams and columns in a U-shape. The precast concrete beam is pressure-bonded and joined to the column.

  The invention described in claim 5 is the precast concrete beam / column press-bonding construction method according to any one of claims 2 to 4, wherein the precast concrete beam has a range from both ends to a stepped portion. It is characterized by being made of high-strength concrete which is formed in a rectangular cross section and is formed in a lightweight cross-sectional shape such as an I shape between the left and right step portions.

  According to a sixth aspect of the present invention, in the precast concrete beam / column press-bonding construction method according to any one of the second to fourth aspects, the precast concrete beam is a precast concrete beam having a uniform cross-section between span columns. It is characterized by being crimped and joined to the side surface of the one pillar via

The precast concrete beam / column pressure bonding structure and pressure bonding structure method according to the present invention have the following effects.
1) In addition to the pillar 2 inside the building, and also when the pillar 2 on the outer periphery of the building and the precast concrete beam 1 are joined by pressure bonding, the fixing work of the PC steel material 3 is realized from the inside of the building. The work scaffold a is not required at all, and it is very excellent in economic efficiency and safety.
2) Since the weight can be reduced by providing the step part 11 in the precast concrete beam 1, it is excellent in conveyance property, workability, and economical efficiency.
3) Since the side pressure by the PC steel material 3 can be applied to the concrete at the beam-column joint, its proof stress and toughness can be increased.

  The precast concrete beam / column pressure bonding structure and the pressure bonding structure method according to the present invention are implemented as follows in order to achieve the effects of the above-described invention.

  FIGS. 1A to 1C show an embodiment of the precast concrete beam / column pressure bonding construction method described in claim 2. Specifically, FIG. 1A shows an elevational sectional view showing the above-described pressure bonding construction method, FIG. 1B shows a sectional view taken along line BB in FIG. 1A, and FIG. 1C shows a CC line in FIG. 1A. An arrow sectional view is shown.

  This crimped joint construction method is a joint construction method in which the precast concrete beam 1 is crimped and joined to the column 2 (particularly, the column on the outer periphery of the building). The column 2 is U-turned in the horizontal section to the one side surface 2a. An opening sheath 7 is provided, and on the beam 1, a sheath 6 arranged so as to coincide with the opening of the sheath 7 of the column 2 is provided on the step portions 11 and 11 provided in the material axis direction of the beam 1. The end of the beam 1 is brought into contact with the side surface 2a of the column 2 so that the respective sheath openings 6 and 7 are aligned with each other, and the PC steel material 3 is moved from the step portions 11 and 11 of the beam 1 to the beam 1. Further, the U-shape is passed through the sheaths 6 and 7 provided on the column 2, and the ends thereof are tensioned, and the stepped portions 11 and 11 are fixed by the fixing tool 4 such as a wedge, and the precast concrete beam 1 is pressure-bonded to the column 2. They are joined (invention of claim 2).

  The precast concrete beam 1 is a high-strength concrete in which the range from both ends to the step portion 11 is formed in a rectangular cross section, and the space between the left and right step portions 11 and 11 is formed in a lightweight cross-sectional shape such as an I shape. (Invention of claim 5). The shape of the precast concrete beam 1 is not limited to this, and can be implemented as long as at least notch portions having a size capable of fixing the PC steel material 3 are secured on both side surfaces of the beam 1. The following technical examples 2 to 4 have almost the same technical idea.

  In addition, although the said sheaths 6 and 7 and PC steel material 3 which concern on the example of illustration are implemented by 2 steps | paragraphs of upper and lower sides, they are not limited to this, Of course, it can increase / decrease suitably according to structural design. The following technical examples 2 to 4 have almost the same technical idea.

  When the precast concrete beam 1 is brought into contact with the side surface of the column 2, the procedure of the pressure bonding construction method includes a sheath connection sleeve (not shown) for connecting the openings of the sheaths 6 and 7 provided on both sides in advance and an outer peripheral type. A frame is installed and the grout material 5 is filled. Next, from the inside of the building, an operation of passing the PC steel material 3 in a U shape in the horizontal direction through the sheaths 6 and 7 and the sheath connecting sleeve is performed, and after the grout material 5 is hardened, the PC steel material 3 is tensioned and the step Fixing is performed on the portions 11 and 11 by the fixing tool 4. Thereafter, mortar grout is press-fitted into the sheaths 6 and 7 to finish the pressure bonding construction method.

  The pressure bonding structure constructed by the pressure bonding structure is a bonding structure formed by pressure bonding the precast concrete beam 1 to the column 2, and the precast concrete beam 1 is opposed to the side surface 2 a of the column 2 on both side surfaces thereof. Step portions 11 and 11 having fixing surfaces are provided, and one end of the PC steel material 3 is fixed to the step portion 11 on one side of the precast concrete beam 1, and the other end passes through the beam 1 and the column 2. Then, it is folded back in a U-shape in the horizontal direction, and is tensioned and fixed to the fixing surface 11 on the other side of the same precast concrete beam 1 so that the precast concrete beam 1 is pressure-bonded to the column 2 (claims). 1).

  Therefore, according to the above-described pressure-bonding structure and pressure bonding structure of the precast concrete beam and column, not only the column 2 inside the building but also the case where the column 2 and the precast concrete beam 1 on the outer periphery of the building are pressure bonded. Since the fixing work of the PC steel material 3 can be performed from the inside of the building, the temporary work scaffold a (see FIG. 5) is not required, and thus it is very excellent in economy and safety. Moreover, since the weight can be reduced by providing the step part 11 in the precast concrete beam 1, it is excellent in conveyance property, workability, and economical efficiency. Furthermore, since the side pressure by the PC steel material 3 can be applied to the concrete at the beam-column joint, its proof stress and toughness can be increased.

  2A and 2B schematically show variations of the precast concrete beam / column press-bonding construction method described in claim 2. FIG. 2A shows an elevational cross-sectional view showing the crimp bonding construction method according to the second embodiment, and FIG. 2B shows a cross-sectional view taken along line BB in FIG. 2A.

  In the pressure bonding construction method according to the second embodiment, the precast concrete beam 1 according to the first embodiment has a side surface of the one column 2 via a span cast column 2 and a precast concrete beam 8 having a uniform cross section between the columns 2 and 2. It is carried out by pressure bonding to 2a (invention of claim 6). The pillar 2 in the building and the precast concrete beam 8 having a uniform sectional shape are linearly provided with sheaths arranged so as to coincide with the openings of the sheaths 6 and 7 provided in the precast concrete beam 1 and the pillar 2 on the outer periphery of the building. ing.

  In the pressure bonding construction method according to the second embodiment, the PC steel materials 3 and 3 provided in two upper and lower stages (however, the longer PC steel material 3 is used than in the first embodiment) are used as the pillars in the outer periphery of the building. 2 is folded in a U-shape in the horizontal direction, passes through the pre-cast concrete beam 8 having the uniform cross-sectional shape, and is strained at the left and right step portions 11, 11 of the pre-cast concrete beam 1 in contact with the pillar 2 inside the building. The fixing device 4 fixes the image. This pressure bonding construction method can be carried out in substantially the same manner for the following Examples 3 and 4.

  The procedure of the pressure bonding construction method is similar to that of the first embodiment. When the precast concrete beams 1 and 8 are brought into linear contact with the side surfaces of the columns 2 and 2, respectively, the sheaths 6 and 7 are previously provided for the respective joint portions. A grout material 5 is filled by interposing a sheath connecting sleeve for connecting openings such as the outer peripheral formwork. Next, from the inside of the building, the PC steel material 3 is folded in a U shape in the horizontal direction through the sheaths 6 and 7 and the sheath connecting sleeve, and the PC steel material 3 is tensioned after the grout material 5 is hardened. Then, the fixing tool 4 fixes the steps 11 and 11 of the precast concrete beam 1. Thereafter, mortar grout is press-fitted into the sheaths 6 and 7 etc., and the pressure bonding construction method is completed.

  The pressure bonding structure constructed by the pressure bonding structure is a bonding structure formed by pressure bonding the precast concrete beam 1 to the column 2, and the precast concrete beam 1 is opposed to the side surface 2 a of the column 2 on both side surfaces thereof. Step portions 11 and 11 having fixing surfaces are provided, and one end of the PC steel material 3 is fixed to the step portion 11 on one side of the precast concrete beam 1 and the other ends thereof are the beams 1 and 8 and the column 2. The precast concrete beam 1 is pressure-bonded to the column 2 by being folded back in a U shape in the horizontal direction and tensioned and fixed to the other fixing surface 11 of the same precast concrete beam 1 ( (Invention of Claim 1)

  Therefore, according to the pressure bonding structure and pressure bonding structure between the precast concrete beam and the column according to the second embodiment, the same effects as those of the first embodiment are obtained. In other words, not only the pillar 2 inside the building but also the pillar 2 on the outer periphery of the building and the precast concrete beam 1 are joined by pressure bonding, the fixing work of the PC steel 3 can be performed from the inside of the building. Scaffolding a (see FIG. 5) is not required, and it is very excellent in economic efficiency and safety. Moreover, since the weight can be reduced by providing the step part 11 in the precast concrete beam 1, it is excellent in conveyance property, workability, and economical efficiency. Furthermore, since the side pressure by the PC steel material 3 can be applied to the concrete at the beam-column joint, its proof stress and toughness can be increased.

  FIG. 3 is a plan sectional view schematically showing an embodiment of the precast concrete beam / column press-bonding construction method according to claim 3.

  In short, the pressure bonding construction method according to the third embodiment is characterized in that adjacent precast concrete beams 1, 1 a (or 1 a, 1 b) are fixed in series with a PC steel material 3.

  That is, the pressure bonding construction method according to the third embodiment is such that adjacent columns 2 and 2 (especially columns on the outer periphery of a building) and a beam 8 laid between the columns 2 and 2 pass through the horizontal section of each column 2 and 2. Sheaths that open to one side 2a, 2a are provided in parallel, and the precast concrete beams 1, 1a are provided with sheaths arranged so as to coincide with the openings of the sheaths of the pillars 2 along both sides thereof. Are provided so as to open to the step portions 11 provided in the direction of the material axis, and the end portions of the precast concrete beams 1 and 1a are brought into contact with the side surfaces 2a and 2a of the adjacent columns 2 and 2 respectively, thereby opening the respective sheaths. The PC steel material 3 is passed through the sheaths provided on the beams 1, 1 a and the columns 2, 2 from the step portions 11 of the beams 1, 1 a in a horizontal U-shape, and the ends thereof are tensioned. It is fixed by a fixing tool 4 such as a wedge to the part 11. Are compression bonding the cleat beam 1,1a into pillars 2,2 (invention described in claim 3).

  Specifically, in the crimping joining method according to the illustrated example, either one of the PC steel materials 3 (for example, the lower stage) provided in the upper and lower two stages on the step parts 11 and 11 of the precast concrete beam 1 according to Example 1 described above. The U-shaped precast concrete beam 1 and the corner pillar 2 at the outer periphery of the building are crimped and joined to each other, and the other (for example, the upper) PC steel material 3 is connected to the pillar 2 at the outer periphery of the building, 2 and the outer circumferential beam 8 between them are folded back horizontally into a U shape, and both ends thereof are tensioned to the step portions 11 and 11 provided in the adjacent precast concrete beams 1 and 1a and fixed by the fixing tool 4. Yes. Similarly, the precast concrete beam 1a and the lower stage of the precast concrete beam 1b adjacent thereto are fixed, for example, and the adjacent precast concrete beams are fixed in a stepwise manner.

  When the precast concrete beams 1 and 1a are brought into contact with the side surfaces 2a and 2a of the columns 2 and 2 respectively, the sheath connection sleeve (shown in the figure) is connected to the openings of the sheaths 6 and 7 provided in advance. The grout material 5 is filled by installing an outer periphery formwork. Next, from the inside of the building, the PC steel material 3 is passed through the sheaths 6 and 7 and the sheath connecting sleeve in a horizontal U shape in a horizontal direction, and after the grout material 5 is hardened, the PC steel material 3 is tensioned and the step Fixing is performed on the portions 11 and 11 by the fixing tool 4. Thereafter, mortar grout is press-fitted into the sheaths 6 and 7 to finish the pressure bonding construction method.

  The pressure bonding structure constructed by the pressure bonding structure is a bonding structure in which precast concrete beams 1 and 1a are pressure bonded to the column 2 and the precast concrete beams 1 and 1a are arranged on both sides of the side surface of the column 2. Steps 11 and 11 having fixing surfaces facing 2a are provided, and the PC steel material 3 has one end fixed to the step 11 on one side of the precast concrete beam 1 and the other end connected to the beam 1, The precast concrete beams 1 and 1a are folded into a U-shape in the horizontal direction through 1a and 8 and the column 2 and are fixed to the fixing surface 11 of another adjacent precast concrete beam 1a by tension. 2 is bonded by pressure bonding (invention of claim 1).

  Therefore, according to the pre-cast concrete beam and column pressure bonding structure and pressure bonding structure method according to the third embodiment, the same effects as those of the first and second embodiments are obtained. In other words, not only the pillar 2 inside the building but also the pillar 2 on the outer periphery of the building and the precast concrete beam 1 are joined by pressure bonding, the fixing work of the PC steel 3 can be performed from the inside of the building. Scaffolding a (see FIG. 5) is not required, and it is very excellent in economic efficiency and safety. Moreover, since the weight can be reduced by providing the step part 11 in the precast concrete beam 1, 1a ..., it is excellent in transportability, workability, and economical efficiency. Furthermore, since the side pressure by the PC steel material 3 can be applied to the concrete at the beam-column joint, its proof stress and toughness can be increased.

  FIG. 4 is an elevational sectional view schematically showing an embodiment of the precast concrete beam / column pressure bonding construction method according to claim 4.

  In short, the pressure bonding construction method according to the fourth embodiment is characterized in that the precast concrete beams 1 and 1 c arranged on the upper and lower floors are fixed in series with the PC steel material 3. Incidentally, it is preferable in terms of construction that the column 2 according to Example 4 is made of precast concrete.

  That is, in the pressure bonding construction method according to the fourth embodiment, the column 2 is provided with a sheath opened in parallel in the vertical direction at the contact portion of the upper and lower beams 1 and 1c on the side surface 2a. A sheath arranged so as to coincide with the opening of the sheath of the column 2 is provided along both side surfaces so as to open to the step portions 11 provided in the material axis direction of the beams 1 and 1c, and to the side surface 2a of the column 2. The ends of the upper and lower beams 1 and 1c are brought into contact with each other so that the respective sheath openings coincide with each other, and the PC steel material 3 is vertically moved from the step portions 11 and 11 of the beam 1 to the sheaths provided on the beams 1 and 1c and the column 2. The end is tensioned in parallel with the U-shape in the direction and fixed to the step portion 11 by a fixing tool 4 such as a wedge, and the precast concrete beams 1 and 1c are pressure bonded to the column 2 (claim 4). Invention).

  Specifically, the pressure bonding construction method according to the illustrated example is such that the PC steel materials 3 and 3 on the lower side of the PC steel material 3 provided on the left and right step portions 11 and 11 of the precast concrete beam 1 are provided on the lower floor. Fold the upper side of the left and right steps 11 and 11 of the precast concrete beam 1c into a U-shape in the vertical direction in the pillars 2 and 2 on the outer periphery of the building, and connect both ends to the precast concrete beams 1 and 1c on the upper and lower floors. The stepped portions 11 and 11 are tensioned and fixed by the fixing device 4. Similarly, the upper and lower PC steel members 3 and 3 of the left and right step portions 11 and 11 of the precast concrete beam 1 are moved to the lower step side of the left and right fixing surfaces 11 and 11 of the lower floor precast concrete beam 1c. The two pillars 2 and 2 are folded in a U-shape in the vertical direction, and both ends are tensioned to the step portions 11 and 11 provided on the precast concrete beams 1 and 1 c on the upper and lower floors, and are fixed by the fixing tool 4.

  When the precast concrete beams 1 and 1c are brought into contact with the side surfaces 2a of the pillars 2 and 2, respectively, the crimp-joining construction method involves interposing a sheath connection sleeve for connecting the openings of the sheaths 6 and 7 provided in advance on both. An outer periphery formwork is installed and the grout material 5 is filled. Next, from the inside of the building, an operation of passing the PC steel materials 3 through the sheaths 6 and 7 and the sheath connecting sleeve in a U-shape in the vertical direction is performed. Specifically, from the inside of the building, the lower-stage PC steel materials 3 and 3 in the left and right step portions 11 and 11 of the precast concrete beam 1 on the upper floor are folded back into a U-shape in the vertical direction, and the precast concrete beam 1c on the lower floor The left and right step portions 11 and 11 are passed through the upper stage side, and the upper-stage PC steel materials 3 and 3 in the left and right step portions 11 and 11 of the upper floor precast concrete beam 1 are folded back in a U-shape in the vertical direction. It passes to the lower step side in the left and right step portions 11, 11 of the precast concrete beam 1c on the lower floor. After the grout material 5 is hardened, each PC steel material 3 is tensioned and fixed to the step portion 11 by the fixing tool 4. Thereafter, mortar grout is press-fitted into the sheaths 6 and 7 to finish the pressure bonding construction method.

  The pressure bonding structure constructed by the pressure bonding structure is a bonding structure formed by pressure bonding the precast concrete beams 1 and 1c to the column 2, and the precast concrete beams 1 and 1c are arranged on both sides of the side surface of the column 2. Steps 11 and 11 having fixing surfaces facing 2a are provided, and the PC steel material 3 has one end fixed to the step 11 of the precast concrete beam 1 and the other end fixed to the beams 1 and 1c and the column. 2 and 2 are folded in a U-shape in the vertical direction, and are fixed to the fixing surface 11 of the different precast concrete beam 1c on the lower floor (or upper floor) by tension. 1c is pressure-bonded to the column 2 (the invention according to claim 1).

  Therefore, according to the precast concrete beam and column pressure bonding construction method and the pressure bonding structure according to the fourth embodiment, the same effects as those of the first to third embodiments are obtained. That is, not only the pillar 2 inside the building but also the pillar 2 on the outer periphery of the building and the precast concrete beams 1 and 1c are joined by pressure bonding, the fixing work of the PC steel material 3 can be performed from the inside of the building. The work scaffold a (see FIG. 5) is unnecessary, and thus it is very excellent in economic efficiency and safety. Moreover, since the weight can be reduced by providing the step part 11 in the precast concrete beams 1 and 1c, it is excellent in conveyance property, workability, and economical efficiency. Furthermore, since the side pressure by the PC steel material 3 can be applied to the concrete at the beam-column joint, its proof stress and toughness can be increased.

  The embodiments have been described with reference to the drawings. However, the present invention is not limited to the illustrated embodiments, and design modifications and application variations that are usually made by those skilled in the art are within the scope of the technical idea of the invention. Note that it includes the range.

A is an elevational sectional view showing a pre-cast concrete beam-column pressure bonding construction method and a pressure bonding structure according to Example 1, B is a cross-sectional view taken along line B-B of A, and C is A It is CC sectional view taken on the line. FIG. 5 is a vertical sectional view showing a pre-cast concrete beam and column pressure bonding construction method and a pressure bonding structure according to Example 2, and B is a cross-sectional view taken along line B-B in FIG. FIG. 6 is a cross-sectional plan view showing a pre-cast concrete beam / column pressure bonding structure and a pressure bonding structure according to a third embodiment. FIG. 6 is a sectional elevation view showing a precast concrete beam / column pressure bonding construction method and a pressure bonding structure according to Example 4; It is the sectional elevation which showed the pressure bonding construction method and pressure bonding structure of a precast concrete beam and a column concerning the prior art.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Precast concrete beam 2 Column 2a Column side surface 3 PC steel material 4 Fixing tool 5 Grout material 6 Sheath 7 Sheath 8 Precast concrete beam 11 Step part 1a Precast concrete beam 1b Precast concrete beam 1c Precast concrete beam

Claims (6)

In a joint structure consisting of precast concrete beams joined to a column by pressure bonding,
Precast concrete beams are provided with stepped portions on both side surfaces with fixing surfaces facing the side surfaces of the columns,
One end of the PC steel material is fixed to the step portion of the precast concrete beam, and the other end is folded horizontally or vertically through the inside of the beam and the column to be the same or different precast concrete beam. A precast concrete beam-to-column pressure bonding structure, wherein the precast concrete beam is pressure-bonded to the column by being tensioned and fixed to the provided step. In the joint construction method in which precast concrete beams are crimped to columns,
The column is provided with a sheath that is U-turned in the horizontal cross section and opens to one side surface, and the beam is provided with a sheath arranged along the both side surfaces so as to coincide with the opening of the column sheath. Provided to open to the step provided in
The end of the beam is brought into contact with the side surface of the column so that the respective sheath openings coincide with each other, and the PC steel material is tensioned through a U-shape from the beam step to the sheath provided on the beam and the column. A precast concrete beam-to-column pressure bonding construction method, characterized in that the precast concrete beam and the column are pressure bonded to the column. In the joint construction method in which precast concrete beams are crimped to columns,
A sheath that opens to one side of each column through the horizontal cross section is provided in parallel between adjacent columns and the beam installed between them, and the precast concrete beam has a sheath of the column along both side surfaces thereof. A sheath arranged to match the opening is provided so as to open in a step provided in the direction of the material axis of the beam,
The ends of the precast concrete beams are brought into contact with the side surfaces of the adjacent columns so that the respective sheath openings coincide with each other, and the PC steel material is horizontally U-shaped from the beam step portion to the sheath provided on the beam and the column. A precast concrete beam-to-column pressure bonding construction method, characterized in that the precast concrete beam and the column are pressure-bonded and bonded to the column by tensioning through the shape and fixing to the stepped portion. In the joint construction method in which precast concrete beams are crimped to columns,
The column is provided with a sheath that opens in the vertical direction at the contact portion of the upper and lower beams on the side surface, and the beam has a sheath arranged so as to coincide with the opening of the column sheath along both side surfaces. Provided to open to the step provided in the material axis direction of
The ends of the upper and lower beams are brought into contact with the side surfaces of the column so that the respective sheath openings coincide with each other, and the PC steel material is vertically passed through the sheath provided on the beam and the column in a U-shape. A pre-cast concrete beam-to-column pressure bonding construction method, characterized in that the pre-cast concrete beam and the column are pressure-bonded and bonded to the column.   The precast concrete beam is manufactured from high-strength concrete in which the range from both ends to the stepped portion is formed in a rectangular cross section, and the space between the left and right stepped portions is formed in a lightweight cross-sectional shape such as an I shape. The pre-cast concrete beam and column pressure bonding construction method according to any one of claims 2 to 4, which is characterized by the following.   The precast concrete beam according to any one of claims 2 to 4, wherein the precast concrete beam is pressure-bonded to a side surface of the one column via a precast concrete beam having a uniform cross-section between span columns. Crimp joint construction method for concrete beams and columns.

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