JP2847481B2 - Construction method of ramen structural column members - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of constructing a column member having a rigid frame.

[0002]

2. Description of the Related Art Conventionally, a composite column has been used as a ramen structural column member. This composite column is configured, for example, as shown in the cross-sectional view of the composite column in FIG. 13 and the vertical cross-sectional view of the composite column in FIG. That is, the composite column 110 is
A PC shell 101 is inserted into an axial bar 100 extending upward from 0, and the PC shell 101 has a band bar 102.
Concrete is poured into C shell 101 and core 103
Has been constructed. The PC shell 101 and the core 103 are made integral by providing a protruding shear key 104 on the inner surface of the PC shell 101 or the like.

[0003]

SUMMARY OF THE INVENTION Such a composite pillar 11 is described.
0, when a high compressive force acts on the composite column 110 from the beam 120 due to an earthquake or the like, as shown in FIG.
01 produces an axial strain. Further, as shown in FIG. 16, when a horizontal force is applied, the deformation angle of the composite column 110 is increased, so that the column head 121 and the column base 131 of the composite column 110 are subject to compression failure and buckling. However, the effect of the stirrups of the PC shell 101 cannot be sufficiently exhibited.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to provide a method of constructing a column member having a rigid frame structure that reduces axial strain and prevents compression failure and buckling.

[0005]

Means for Solving the Problems In order to solve the above problems and achieve the object, the present invention has the following constitution. The invention according to claim 1 is that "a PC shell having a band is inserted from above into an axial bar extending upward from a slab, a concrete is cast, and a core is constructed in the PC shell. A method of constructing a ramen structural column member, wherein the column is extended from an upper end portion of a PC shell, and a beam and a slab are constructed above the extended portion of the core. 』
It is.

According to the first aspect of the present invention, concrete is cast, a core is installed in a PC shell having a stirrup, and this core is extended from an upper end portion of the PC shell and lengthened. A beam and a slab are constructed above the extension of the core, and a gap is provided between the upper end of the PC shell and the beam. This gap prevents high compressive forces from the beam and slab from acting on the PC shell, and does not impair the performance of the PC shell as shear reinforcement. Also, core and PC
Since the axial force is not transmitted to the PC shell due to the displacement between the shell and the shell, even if a horizontal force acts, the PC shell is prevented from being compressed or buckled.

[0007] The invention according to claim 2 is that "a PC shell having a steel pipe inside is inserted from above into a shaft extending from the slab, and concrete is cast and a core is constructed in the PC shell. A method for constructing a rigid frame structural column member, characterized in that the core is extended from the upper end of the PC shell to be longer, and a beam and a slab are constructed above the extension of the core. ].

According to the second aspect of the present invention, concrete is cast, a core is constructed in a PC shell having a steel pipe inside, and the core is extended from the upper end of the PC shell to be elongated. A beam and a slab are constructed above the extension of the core to provide a gap between the upper end of the PC shell and the beam. This gap prevents high compressive forces from the beam and slab from acting on the PC shell, and does not impair the performance of the PC shell as shear reinforcement. Further, since the transmission of the axial force to the PC shell is more reliably prevented by the steel pipe inside the PC shell, even if a horizontal force acts,
Compression breakage and buckling of the PC shell are prevented. Further, since the steel pipe is arranged inside the PC shell, the steel pipe has a fireproof structure.

According to a third aspect of the present invention, a PC shell having slits provided in an axial direction in a shaft extending upward from a slab and having a strip is inserted from above, and the PC shell is joined to a wall through the slit. Arrange the bars, cast concrete, construct the core and the wall in the PC shell integrally, extend the core from the upper end of the PC shell and lengthen it,
A method of constructing a ramen structural column member, wherein a beam and a slab are constructed on an upper portion of an extension of the core. ].

[0010] According to the third aspect of the present invention, a connecting bar to the wall is arranged from the slit of the PC shell having the stirrup, concrete is cast, and the core and the wall in the PC shell are integrally constructed. By extending the core from the upper end of the PC shell and lengthening it, constructing beams and slabs above the extension of the core, and arranging reinforcing bars to the wall from the slits in the PC shell. The core and the wall in the PC shell are constructed integrally by casting concrete, and the construction is simple and a strong structure.

According to a fourth aspect of the present invention, a PC shell having a slit provided in the axial direction and having a steel pipe inside is inserted from above into an axial reinforcement extending upward from the slab, and a wall is formed from the slit of the PC shell to the steel pipe. Is welded, concrete is cast, and the core and the wall in the PC shell are integrally formed, and the core is extended from the upper end of the PC shell and lengthened. A method of constructing a ramen structural column member, wherein a beam and a slab are constructed on an upper part of a frame. ].

According to the fourth aspect of the present invention, the joining member of the wall is welded to the steel pipe from the slit of the PC shell having the steel pipe inside, and concrete is cast to integrate the core and the wall in the PC shell integrally. Installed, extend the core from the upper end of the PC shell, lengthen it, install beams and slabs on the upper part of the extension of the core, and weld the joint of the wall to the steel pipe from the slit of the PC shell. Then, concrete is cast and the core and the wall in the PC shell are integrally constructed, and the construction is simple and a strong structure is obtained.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a method for constructing a column member having a rigid frame according to the present invention will be described with reference to the drawings. 1 to 3 show a method of constructing a column member having a ramen structure according to claim 1, FIG. 1 is a diagram showing a state in which a PC shell is inserted into a shaft, FIG. 2 is a side view of the column member having a ramen structure, FIG. FIG. 3 is a sectional view taken along the line III-III in FIG. 2.

As shown in FIG. 1, a PC shell 4 having a band 3 is inserted into a shaft 2 extending upward from a slab 1 from above. The PC shell 4 is supported at a predetermined height by a level adjusting member 5, and concrete is poured into the PC shell 4, and a core 6 is constructed in the PC shell 4. The core 6 is extended from the upper end of the PC shell 4 to be long. Then, the beam 7 and the slab 1 are constructed on the upper part of the extension of the core 6, and then the level adjusting member 5 is removed.

As described above, the PC shell 4 is inserted from above into the shaft 2 extending upward from the slab 1, concrete is cast, and the core 6 is installed in the PC shell 4.
Is extended from the upper end portion of the PC shell 4 to be longer, and the beam 7 and the slab 1 are installed on the upper portion of the extension portion of the core 6 so that the gap L11 between the slab 1 and the lower portion of the PC shell 4 is formed.
And a gap L12 is provided between the upper part of the PC shell 4 and the beam 7. The gaps L11 and L12 prevent a high compressive force from the beam 7 from acting on the PC shell 4 due to an earthquake or the like, and the performance of the PC shell 4 as shear reinforcement is not impaired. In addition, since a displacement occurs between the core 6 and the PC shell 4 and the axial force is not transmitted to the PC shell 4, even if a horizontal force acts on the PC shell 4 due to an earthquake or the like, the PC shell 4 undergoes compression failure or buckling. Is prevented from occurring.

FIGS. 4 to 7 show a method of constructing a column member having a ramen structure according to claim 2, FIG. 4 is a diagram showing a state in which a PC shell is inserted into a shaft, and FIG. 5 is a side view of the column member having a ramen structure. 6 is a sectional view taken along the line VI-VI of FIG. 5, and FIG.
It is sectional drawing which follows the VII-VII line. As shown in FIG. 4, a steel pipe 13 is provided inside a shaft bar 12 extending upward from the slab 11.
Is inserted from above. This PC
The shell 14 is supported at a predetermined height by the level adjusting member 15,
Concrete is cast and a core 16 is installed in the PC shell 14, the core 16 is extended from the upper end of the PC shell 14 and lengthened, and a beam 17 is provided above the extension of the core 16.
Then, the slab 11 is constructed, and then the level adjusting member 15 is removed.

As described above, concrete is cast, the core 16 is installed in the PC shell 14 having the steel pipe 13 on the inside, and the core 16 is extended from the upper end of the PC shell 14 to be longer. The beam 17 and the slab 11 are installed on the upper part of the extension of the core 16, and a gap L 21 is provided between the slab 11 and the lower part of the PC shell 14.
A gap L22 is provided between the upper part of the beam and the beam 17. The gaps L21 and L22 prevent a high compression force from the beam 17 and the slab 11 from acting on the PC shell 14 due to an earthquake or the like, and the performance of the PC shell 14 as shear reinforcement is not impaired. In addition, since the transmission of the axial force to the PC shell 14 is more reliably prevented by the steel pipe 13 inside the PC shell 14, even if a horizontal force is applied, the PC shell 14 is subjected to compression failure or buckling. Is prevented.
In addition, the steel pipe 13 is disposed inside the PC shell 14 so as to have a fire-resistant structure.

8 and 9 show a method of constructing a column member having a ramen structure according to the third aspect, FIG. 8 is a cross-sectional view of the column member having a ramen structure, and FIG. 9 is a cross-sectional view taken along line IX-IX of FIG. It is.
A PC shell 23 having an axial slit 22a provided in an axial line 22 extending upward from the slab 21 and having a band line 24
Into the slit 23 of the PC shell 23.
a, the connecting bar 26 of the wall 25 is arranged on the shaft bar 22, and concrete is poured into the core bar 27 and the wall 25 of the PC shell 23.
Are integrally formed, the core 27 is extended from the upper end of the PC shell 23 to be longer, and the beam 28 and the slab 21 are installed above the extended portion of the core 27.

As described above, by arranging the joining bars 26 to the wall 25 from the slits 23a of the PC shell 23 having the stirrups 24, concrete is cast and the core 27 and the wall 25 in the PC shell 23 are joined. It is constructed in one piece, easy to construct,
It becomes a strong structure. 10 to 12 show a method for constructing a ramen structural column member according to claim 4, FIG. 10 is a cross-sectional view of the ramen structural column member, FIG. 11 is a cross-sectional view taken along line XI-XI of FIG. FIG. 9 is a view showing another embodiment of the joint between the PC shell and the wall.

An axial bar 32 extending upward from the slab 31
A PC shell 33 having a slit 33a provided in the axial direction and having a steel pipe 34 inside is inserted from above, and the distal end 36a of a joining bar 36 as a joining member of the wall 35 is brought into contact with the steel pipe 34 from the slit 33a of the PC shell 33. The core 37 in the PC shell 33 and the wall 35 are integrally formed, and the core 37 is extended from the upper end of the PC shell 33 to be longer. The beam 38 and the slab 31 are constructed on the upper part of the slab.

As described above, the PC having the steel pipe 34 inside
By welding the tip 36a of the joint 36b of the wall 35 from the slit 33a of the shell 33 to the steel pipe 34, concrete is cast and the core 37 in the PC shell 33 and the wall 35 are integrally constructed, and the construction is simple. , Resulting in a strong structure. Further, in this embodiment, a joint bar 36 is used as a joint member, and the distal end 36a of the joint bar 36 is directly connected to the PC shell 33.
However, the present invention is not limited to this. For example, as shown in FIG.
The tip 36a of the bolt 6 is bent and welded, and the tip 40a of the bolt 40 is welded by abutting the tip 40a of the bolt 40 on the steel pipe 34 as shown in FIG. It is also possible to abut and weld both ends 41a of the reinforcing bar 41.

[0022]

As described above, according to the first aspect of the present invention, concrete is cast and a core is installed in a PC shell having a stirrup, and this core is extended from the upper end of the PC shell. A beam and a slab are constructed above the extension of the core, and a gap is provided between the upper end of the PC shell and the beam.
High compressive force from the beam is prevented from acting on the C shell, and the performance of the PC shell as shear reinforcement is not impaired. In addition, since a displacement occurs between the core and the PC shell and axial force is not transmitted to the PC shell, even if a horizontal force is applied due to an earthquake or the like, the PC shell may be compressed or buckled. Is prevented.

According to the second aspect of the present invention, concrete is cast, a core is installed in a PC shell having a steel pipe inside, and the core is extended from an upper end portion of the PC shell and lengthened. A beam is constructed on the upper part of the extension of the PC shell, and a gap is provided between the upper end of the PC shell and the beam. Due to this gap, a high compression force from the beam and the slab acts on the PC shell due to an earthquake or the like. And the performance of the PC shell as shear reinforcement is not impaired. In addition, since the transmission of axial force to the PC shell is more reliably prevented by the steel pipe inside the PC shell, even if a horizontal force acts on the PC shell due to an earthquake or the like, compression failure or buckling may occur in the PC shell. Is prevented. Further, since the steel pipe is arranged inside the PC shell, the steel pipe has a fireproof structure.

According to the third aspect of the present invention, a P having a stirrup
Arrange joints with the wall from the slit of the C shell, cast concrete, and the core and the wall in the PC shell are integrally constructed, further extend the core from the upper end of the PC shell, lengthen it, A beam and a slab are constructed on the upper part of the extension of this core, and by arranging joints to the wall from the slits of the PC shell, concrete is cast and the core and the wall in the PC shell are integrated. Construction is easy, construction is a strong structure.

According to the fourth aspect of the present invention, the joining member of the wall is welded to the steel pipe from the slit of the PC shell having the steel pipe on the inner side, and concrete is cast to form the core and the wall in the PC shell integrally. In addition, the core is extended from the upper end of the PC shell to make it longer, and beams and slabs are constructed on the upper part of the extension of the core. By welding the joining member of the wall to the steel pipe from the slit of the PC shell. The core and the wall in the PC shell are constructed integrally by casting concrete, and the construction is simple and a strong structure.

[Brief description of the drawings]

FIG. 1 is a diagram showing a state where a PC shell is inserted into a shaft muscle.

FIG. 2 is a side view of a ramen structural column member.

FIG. 3 is a sectional view taken along line III-III in FIG. 2;

FIG. 4 is a diagram illustrating a state where a PC shell is inserted into a shaft muscle.

FIG. 5 is a side view of a ramen structural column member.

FIG. 6 is a sectional view taken along the line VI-VI in FIG. 5;

FIG. 7 is a sectional view taken along the line VII-VII in FIG. 6;

FIG. 8 is a cross-sectional view of a ramen structural column member.

FIG. 9 is a sectional view taken along line IX-IX in FIG. 8;

FIG. 10 is a cross-sectional view of a ramen structural column member.

FIG. 11 is a sectional view taken along the line XI-XI in FIG. 10;

FIG. 12 is a view showing another embodiment of joining a PC shell and a wall.

FIG. 13 is a cross-sectional view of a composite column.

FIG. 14 is a longitudinal sectional view of a composite column.

FIG. 15 is a side view showing transmission of the axial force of the composite column.

FIG. 16 is a side view showing buckling of the composite column.

[Explanation of symbols]

 DESCRIPTION OF REFERENCE NUMBERS 1 slab 2 axial bar 3 band bar 4 PC shell 6 core 7 beam

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) E04B 1/16

Claims (4)

(57) [Claims] 1. A PC shell having a strip is inserted from above into an axial bar extending upward from a slab, a concrete is cast and a core is constructed in the PC shell, and the core is attached to an upper end of the PC shell. A method of constructing a ramen structural column member, wherein the column and the slab are extended from a portion of the core, and a beam and a slab are constructed above the extension of the core. 2. A PC shell having a steel pipe inside is inserted from above into an axial bar extending upward from the slab, a concrete is cast, and a core is constructed in the PC shell. A method for constructing a ramen structural column member, comprising extending a length from an upper end portion, and constructing a beam and a slab above the extension portion of the core. 3. A PC shell having slits provided in an axial direction and having a band is inserted from above into an axial bar extending upward from the slab, and a connecting bar to a wall is arranged from the slit of the PC shell, and concrete is provided. And the core and the wall in the PC shell are integrally constructed, and the core is extended from the upper end of the PC shell and lengthened, and a beam and a slab are constructed above the extended portion of the core. A method of constructing a column member having a rigid frame structure. 4. A PC shell having a slit provided in the axial direction and having a steel pipe inside is inserted from above into an axial reinforcement extending upward from the slab, and a joining member of a wall is welded to the steel pipe from the slit of the PC shell. Pour concrete into the PC
The core and the wall in the shell are integrally constructed, and the core is
A method for constructing a ramen structural column member, wherein the column is extended from an upper end portion of a C-shell, and a beam and a slab are constructed above the extended portion of the core.