JP2020090791A - Column joining method - Google Patents

Abstract

To reliably bear a vertical load on a post to be installed later between lower structural members.SOLUTION: A joining method includes the steps of: installing a jack 50 between upper and lower beams 12L and 12U, and jacking up the upper beam 12U; installing a stud 110 between the upper and lower beams 12L and 12U; filling grout between upper and lower end parts 112L and 112U of the stud 110 and the beams 12L and 12U; and jacking down and removing the jack 50 after the grout is solidified.SELECTED DRAWING: Figure 3

Description

The present invention relates to a method for joining columns.

Patent Document 1 discloses a technique relating to a method for earthquake-proofing reinforcement of a reinforced concrete column of an underground structure. In this prior art, in order to perform earthquake-proof reinforcement of an underground structure having a plurality of existing reinforced concrete columns, seismic-reinforced columns are installed between adjacent existing reinforced concrete columns. If a large earthquake occurs due to this and the existing reinforced concrete columns are damaged, the load on the underground structure will be replaced by the seismic reinforcement columns to minimize damage to the underground structure.

JP, 10-46833, A

However, in the technique of Patent Document 1, the seismic-proof reinforcement column hardly bears or does not sufficiently bear the top load of the underground structure until the reinforced concrete column is damaged.

In view of the above facts, the present invention has an object to surely bear a vertical load on a column to be installed later between upper and lower structural members.

A first aspect is to install a jack between upper and lower structural members and jack up the upper structural member, install a column between the upper and lower structural members, and upper and lower ends of the column. A pillar joining method comprising: a step of filling a filling material between at least one of the parts and the structural member; and a step of jacking down and removing the jack after the filling material is solidified.

In the first aspect, the upper structural member is jacked up, the pillar is installed between the upper and lower structural members, and the filling material is filled between at least one of the upper and lower end portions of the pillar and the body. Then, after the filling material has solidified, the jack is jacked down and removed, so that the vertical load can be surely applied to the pillar to be installed later between the upper and lower structural members.

The step of jacking up the upper structural member and the step of installing the pillar between the upper and lower structural members may be reversed in order.

In a second aspect, the first shearing force transmitting means is provided on a first convex portion provided on one of the end portion and the joint portion, and on the other of the end portion and the joint portion, and the first convex portion. The column joint structure according to the first aspect, which is configured by a first concave portion with which the portion is engaged.

In the second aspect, the prestressed column is installed between the upper and lower structural members, and the filler is filled between at least one of the upper and lower ends of the column and the structural member. Then, after the filler is hardened, the prestress is released, so that the vertical load can be surely applied to the column.

A third aspect is a joining portion formed by solidifying the filler, a first shearing force transmitting means for transmitting a shearing force between the end portion and the joining portion, the structural member and the joining portion. The second shearing force transmitting means for transmitting a shearing force to and from the portion, and the column joining method according to claim 1 or 2.

In the third aspect, the shearing force is transmitted between the column and the joint by the first shearing force transmitting means, and the shearing force is transmitted between the joint and the structural member by the second shearing force transmitting means. Therefore, the shearing force is transmitted between the column and the structural member via the joint, the first shearing force transmitting means, and the second shearing force transmitting means.

According to the present invention, a vertical load can be surely applied to a column to be installed later between upper and lower structural members.

It is a front view which shows in part a cross section the frame in which the pillar joint structure of the first embodiment is applied and the studs are installed. It is an expanded sectional view of the junction part of the lower beam of the stud and the lower beam of FIG. It is process drawing which shows the construction procedure which installs a stud later on the frame of FIG. 1 in order from (A) to (C). It is a front view which shows the principal part of a frame with which the joining structure of the pillar of 2nd embodiment was applied and the stud was installed in a partial cross section. (A) is an enlarged front view of a central portion in the axial direction of the stud of the second embodiment, and (B) is an enlarged cross-sectional view of the lower end portion of the stud of the second embodiment. It is a process drawing which shows the construction procedure which installs a stud later on the frame of FIG. 4 in order from (A) to (C).

<First embodiment>
The pillar joint structure and the construction method of the first embodiment of the present embodiment will be described.

[Construction]
First, the structure of this embodiment will be described.

As shown in FIG. 1, the column joint structure 100 of the present embodiment includes a stud 110, a lower joint portion 120L, an upper joint portion 120U, a lower first shearing force transmitting mechanism 150L, and an upper first shearing portion. It has a force transmission mechanism 150U, a lower second shear force transmission mechanism 170L, and an upper second shear force transmission mechanism 170U.

In the following description, the lower member will be denoted by L after the reference numeral, the upper member will be denoted by U after the reference numeral, and L and U after the reference numeral will be omitted when description is made without distinguishing between them. To do. Even when it is described with reference to FIG. 2 which illustrates a joining portion between the lower end 112L of the stud 110 and the lower beam 12L, which will be described later, the upper and lower parts are not distinguished, that is, L and The description may be omitted with U omitted.

The stud 110, which is an example of a pillar, is installed in a frame 16 configured by the beams 12L and 12U and the pillar 14. The studs 110 according to the present embodiment are extra-fine columns (pen columns) made of ultra-high strength concrete (APC (registered trademark) of Fc300 as an example).

As shown in FIG. 2, the stud 110 of the present embodiment is internally provided with a pillar main bar 114 along the axial direction.

As shown in FIG. 1, the joints 120L and 120U are formed by solidifying the grout material G (see FIG. 2) filled between the ends 112L and 112U of the stud 110 and the beams 12L and 12U. There is.

The grout material G forming the joints 120L and 120U of the present embodiment is made of the same superhigh-strength concrete as the stud 110 (APC (registered trademark) of Fc300 as an example).

The first shear force transmission mechanisms 150L and 150U are mechanisms that transmit shear force between the ends 112L and 112U of the stud 110 and the joints 120L and 120U. Similarly, the second shear force transmission mechanisms 170L and 170L are mechanisms that transmit shear force between the joints 120L and 120U and the beams 12L and 12U.

The lower joint 120L and the upper joint 120U have the same structure except that they are vertically symmetrical. Similarly, the lower first shear force transmission mechanism 150L and the upper first shear force transmission mechanism 150U have the same structure except that they are vertically symmetrical, and the lower second shear force transmission mechanism 170L and the upper side first shear force transmission mechanism 150L are the same. The second shearing force transmission mechanism 170U has the same structure except that it is vertically symmetrical.

As shown in FIG. 2, the first shearing force transmission mechanism 150 includes a first protrusion 152 protruding from the end 112 of the stud 110 and a first recess formed in the joint 120 and engaged with the first protrusion 152. 154 and. Note that, as described above, FIG. 2 illustrates the joining portion between the lower end 112L of the stud 110 and the lower beam 12L, but as described above, the upper and lower portions are not distinguished, that is, the reference numeral The description will be omitted by omitting L and U after.

The second shearing force transmission mechanism 170 is composed of a second convex portion 172 formed on the joint portion 120 and a second concave portion 174 formed on the beam 12 and engaged with the second convex portion 172. In the present embodiment, the second convex portion 172 formed on the joint portion 120 is larger than the outer shape of the stud 110 and projects laterally outward. Further, the second recess 174 formed in the beam 12 is larger than the outer shape of the stud 110.

In the present embodiment, the joint 120 is composed of the joint main body 122 having the first recess 154 formed therein and the second protrusion 172 protruding laterally outward. The upper surface 124L (or the lower surface 124U) exposed from the beam 12L at the projecting portion of the second convex portion 172 is flush with or substantially flush with the upper surface 13L (or the lower surface 13U (see FIG. 1)) of the beam 12L. .. Further, a notch 126 that is recessed inward in the lateral direction is formed at a boundary portion of the joint body 122 with the second protrusion 172, and the notch 126 is filled with a sealant 128 made of a silicone resin or the like. There is.

In addition, a bar-shaped beam-side temporary fixing member 25 for temporarily fixing the stud 110 when the stud 110 is installed later and a crack-proof reinforcing bar member 20 are embedded in the joint portion 120.

The bar-shaped beam-side temporary fixing member 25 is temporarily fixed to the beam 12. A column-side temporary fixing member 119 is provided at the end 112 of the stud 110. The stud 110 is temporarily fixed by inserting the rod-shaped beam-side temporary fixing member 25 into the temporary fixing hole 117 of the pillar-side temporary fixing member 119. The temporary fixing method is not limited to such a method. It may be temporarily fixed by any method.

Further, in the present embodiment, a heater wire (not shown) made of a nichrome wire or the like is embedded in the joint portion 120. The arrangement pattern of the heater wires in the present embodiment is arranged so as to be folded back and meandered on the surface in a plan view and have a constant interval. Then, both ends of the heater wire are connected to a power supply device (not shown) and electricity is passed through the heater wire, whereby the heater wire generates heat and the grout material G is heated.

[Construction method]
Next, an example of the construction method of this embodiment will be described.

As shown in FIG. 3A, the upper surface 13L of the lower beam 12L and the lower surface 13U of the upper beam 12U are removed to form second recesses 174L and 174U. Further, the jacks 50 are installed on both sides of the second recesses 174L and 174U, and the upper beam 12U is jacked up (between the upper and lower beams 12 is widened). A support member 52 that receives the reaction force of the jack 50 may be installed on the lower floor.

As shown in FIG. 3B, the beam-side temporary fixing member 25 is temporarily fixed between the second recess 174L of the beam 12L and the second recess 174U of the beam 12U. The stud 110 is installed between the second recess 174L of the beam 12L and the second recess 174U of the beam 12U, and the rod-shaped beam-side temporary fixing member 25 is inserted into the temporary fixing hole 117 of the column-side temporary fixing member 119. Then, the stud 110 is temporarily fixed.

The crack preventing reinforcing bar members 20L and 20U are installed in the second recesses 174L and 174U, and a formwork (not shown) is provided between the end portions 112L and 112U of the stud 110 and the second recesses 174L and 174U of the beams 12L and 12U. Provide around. In addition, a heater wire (not shown) is wired in the frame.

The upper beam 12U may be jacked up after the stud 110 is installed between the second recess 174L of the beam 12L and the second recess 174U of the beam 12U.

As shown in FIG. 3C, a grout material G (see FIG. 2) as an example of a filler is filled in a frame (not shown). The formwork is provided with a protrusion having a notch 126 (see FIG. 2). Then, the grout material G (see FIG. 2) is solidified, so that the joints 120L and 120U in which the first recess 154 and the second recess 174 (see FIG. 2) are formed are constructed. The mold (not shown) is removed, and the notch 126 is filled with the sealant 128 (see FIG. 2).

When the filling of the grout material G is completed, the heater wire is heated by connecting the end portion of the heater wire to a power supply device (not shown) to heat the heater wire, thereby heating the grout material G. Then, the grout material G is heated and the temperature of the grout material G rises, thereby promoting the hydration reaction (solidification). The heater wire remains buried (becomes buried) in the joint portion 120 even after the construction, but there is no problem in strength.

Further, the jack 50 (FIG. 3(B)) is jacked down and removed. When the support member 52 (see FIG. 3B) is installed on the lower floor, the support member 52 is also removed. A vertical load is applied to the stud 110 by jacking down the jack 50 (see FIG. 3B) and removing it.

[Action and effect]
Next, the operation and effect will be described.

Axial force is transmitted between the stud 110 and the beams 12L and 12U through the joints 120L and 120U formed between the ends 112L and 112U of the stud 110 and the beams 12L and 12U.

Further, between the end portions 112L, 112U of the stud 110 and the joint portions 120L, 120U, a shear force is generated by the first shear force transmission mechanisms 150L, 150U (first convex portions 152L, 152U and first concave portions 154L, 154U). Transmitted.

Then, the shear force is transmitted between the joints 120L, 120U and the beams 12L, 12U by the second shear force transmission mechanisms 170L, 170U (the second convex portions 172L, 172U and the second concave portions 174L, 174U).

In this manner, the stud 110 and the beams 12L and 12U are connected to each other through the joints 120L and 120U, the first shear force transmission mechanisms 150L and 150U, and the second shear force transmission mechanisms 170L and 170U, and the axial force and the shear force. Is transmitted. Therefore, it is possible to easily join the stud 110 and the beams 12L and 12U, which will be installed later, without arranging reinforcing bars or the like across the stud 110 and the beams 12L and 12U.

Further, the stud 110 is installed between the upper and lower beams 12L and 12U in a jack-up state of the beam 12U, and the end portions 112L and 112U of the stud 110 in which the first convex portions 152L and 152U are formed and the second concave portion 174L. By filling and solidifying the grout material G between the beams 12L and 12U on which 174U are formed, the joints 120L and 120U capable of transmitting both the axial force and the shearing force are easily formed.

Then, by jacking down and removing the jack 50, the vertical load can be reliably and constantly applied to the stud 110 that is installed later. Therefore, the frame 16 can be effectively reinforced by the studs 110 installed later.

Further, in the present embodiment, when the grout material G is solidified, the heater wire is heated to raise the temperature of the grout material G and accelerate the hydration reaction of the grout material G. Therefore, the strength of the grout material G is improved and the curing period is shortened.

Here, in the present embodiment, the grout material G having high compressive strength is used. Since the joint 120 has a small cross-sectional dimension, the temperature rise due to the hydration heat reaction is small, and as a result, strength development is small, and since it is filled at the construction site, it is hardly subjected to a high temperature history due to heat curing. Therefore, when nothing is done, the hydration reaction of the grout material G does not proceed sufficiently and high strength may not be obtained. Therefore, at a construction site where the heater wire is not buried in the joint 120, for example, the periphery of the corresponding building floor is covered with a sheet or the like to indirectly heat the periphery with a jet heater so that a predetermined strength is obtained. ing. However, in such a method, not only is the construction time-consuming, but the reaction rate of the hydration reaction is slow, and a long curing period is required to obtain a predetermined strength.

However, in the present embodiment, since the heater wire is embedded in the joint portion 120 to generate heat, the temperature of the grout material G is increased and the hydration reaction is promoted, so that high strength can be obtained.

In addition, even when the grout material G does not require high strength, in a cold region or in winter, the reaction rate of the hydration reaction is slow and a long curing period is required to obtain a predetermined strength. There is. However, similarly, by heating the grout material G to promote the hydration reaction, the curing period can be shortened.

<Second embodiment>
The column joint structure and the construction method of the second embodiment of the present embodiment will be described. The same members as those in the first embodiment are designated by the same reference numerals, and overlapping description will be omitted or simplified.

[Construction]
First, the structure of this embodiment will be described.

As shown in FIG. 4, the column joint structure 100 of the present embodiment includes a stud 210, a lower joint 220L, an upper joint 120U, a lower first shearing force transmission mechanism 250L, and an upper first shear. It has a force transmission mechanism 150U, a lower second shear force transmission mechanism 170L, and an upper second shear force transmission mechanism 170U.

The upper joint 120U, the upper first shearing force transmitting mechanism 150U, the lower second shearing force transmitting mechanism 170L, and the upper second shearing force transmitting mechanism 170U have the same structure as in the first embodiment. Therefore, the description is omitted.

A stud 210, which is an example of a pillar, is provided with a steel tube 230 at a central portion in the axial direction. The upper side of the steel tube 230 in the stud 210 in the installed state is the upper side column body 232U, and the lower side of the steel tube 230 is the lower side column body 232L (see also FIG. 5A). The upper pillar body 232U and the lower pillar body 232L that form the studs 210 of the present embodiment are made of the super-high-strength concrete of the first embodiment (APC (registered trademark) of Fc300 as an example).

The upper end portion 212U of the stud 210 (upper side pillar body 232U) is provided with a first convex portion 152U that constitutes the upper first shearing force transmission mechanism 150U.

Further, the stud 210 has the self-pressing mechanism 300 built therein. The self-bonding mechanism 300 has the steel tube 230, the PC steel wire 302, and the extension mechanism 310 described above.

A through hole 233 (see FIG. 5B) penetrating in the axial direction is formed in the lower column main body 232L, and the PC steel wire 302, which has screwed screw portions 304L and 304U at both ends, is inserted. is doing.

As shown in FIGS. 4 and 5B, the extension mechanism 310 is provided at the lower end portion 212L of the stud 210 (lower column body 232L). As shown in FIG. 5B, the extension mechanism 310 has a main body part 312 and a movable plate part 320. The body portion 312 has a tubular portion 314 and a bottom portion 316. The bottom portion 316 is fixed to the lower column main body 232L. Further, through holes 317 and 322 are formed in the bottom portion 316 and the movable plate portion 320. Then, the PC steel wire 302 described above is inserted into the through holes 317 and 322.

As shown in FIGS. 5A and 5B, nuts 306 and 307 are screwed into the screw portions 304L and 304U at both ends of the PC steel wire 302.

As shown in FIG. 5B, a disc spring 330 as an example of an elastic member is provided inside the tubular portion 314 of the main body 312. Therefore, the movable plate portion 320 is biased downward by the disc spring 330. Then, the distance between the movable plate portion 320 and the cylindrical portion 314 can be adjusted by the screwing amount of the upper nut 307 (see FIG. 5A). It should be noted that the movable plate portion 320 illustrated by the solid line in the figure is in a state of being close to or in contact with the tubular portion 314, and the movable plate portion 320 illustrated by a two-dot broken line (imaginary line) is in a state of being separated from the tubular portion 314. is there.

As shown in FIG. 4, in the present embodiment, the lower first shearing force transmission mechanism 250L includes a steel wire end portion 252L that is a portion of the PC steel wire 302 protruding from the movable plate portion 320 (FIG. 5B). Is also embedded in the lower joint 220L to transmit the shearing force. Explaining from another viewpoint, the steel wire end portion 252L functions as the first convex portion, and the portion of the joining portion 220L in which the steel wire end portion 252L is embedded functions as the first concave portion 254L.

The lower joint 220L is formed with the first recess 254L and the second protrusion 172L similar to the first embodiment. Further, similarly to the first embodiment, a notch 126L recessed inward in the lateral direction is formed, and the notch 126L is filled with a sealant 128L made of a silicone resin or the like.

The grout material G forming the joint 220L is also made of ultra-high-strength concrete (APC (registered trademark) of Fc300 as an example). A heater wire is also embedded in the joint 220L. Note that, in the joint portions 120U and 220L, as in the first embodiment, crack preventing reinforcing bar members 20U and 20L are embedded.

[Construction method]
Next, the construction method of this embodiment will be described.

As shown in FIG. 6A, the upper surface 13L of the lower beam 12L and the lower surface 13U of the upper beam 12U are scratched to form second recesses 174L and 174U.

As shown in FIG. 6B, the stud 210 is installed between the second recess 174L of the beam 12L and the second recess 174U of the beam 12U. As shown in FIG. 5B, the stud 210 is in a state in which the movable plate portion 320 is in proximity to or in contact with the tubular portion 314, and the stud 210 is prestressed by the spring force of the disc spring 330. Is becoming Further, the reinforcing bar member 20 for preventing cracks is installed in the second recesses 174L and 174U. A mechanism for temporarily fixing the stud 210 may be provided.

As shown in FIG. 6C, a mold (not shown) is provided around the ends 212L and 212U of the stud 210 and the second recesses 174L and 174U of the beams 12L and 12U. In addition, the mold is provided with a protrusion in which the notches 126L and 128U are formed. In addition, a heater wire (not shown) is wired in the frame.

Then, the grout material G (see FIG. 2) is filled in the frame, and the grout material G (see FIG. 2) is solidified, so that the first recess 154U, the first recess 254L, and the second recess 174L, 174U ( The joint portions 220L and 120U in which (see FIG. 4) are formed are constructed. The mold (not shown) is removed, and the notch 126 is filled with the sealant 128 (see FIG. 4).

When the filling of the grout material G is completed, the heater wire is heated by connecting the end portion of the heater wire to a power supply device (not shown) to heat the heater wire, thereby heating the grout material G. Then, the grout material G is heated and the temperature of the grout material G rises, thereby promoting the hydration reaction (solidification).

Then, as shown in FIGS. 4 and 5(A), the nut 307 in the steel tube 230 is loosened to release the prestress of the stud 210, so that the stud 210 is subjected to a vertical load.

[Action and effect]
Next, the operation and effect will be described.

Axial force is transmitted between the stud 210 and the beams 12L and 12U via joints 220L and 120U formed between the ends 212L and 212U of the stud 210 and the beams 12L and 12U.

Further, between the end portions 212L and 212U of the stud 210 and the joint portions 220L and 120U, there are first shearing force transmission mechanisms 250L and 150U (steel wire end portions 252L, first convex portions 152U and first concave portions 254L and 154U). Shear force is transmitted.

Then, the shearing force is transmitted between the joints 220L, 120L and the beams 12L, 12U by the second shearing force transmitting mechanisms 170L, 170U (second convex portions 172L, 172U and second concave portions 174L, 174U).

As described above, the axial force and the shear force are connected between the stud 210 and the beams 12L and 12U via the joints 220L and 120U, the first shear force transmission mechanisms 250L and 150U, and the second shear force transmission mechanisms 170L and 170U. Is transmitted. Therefore, it is possible to easily join the stud 210 and the beams 12L and 12U to be installed later without arranging the reinforcing bars and the like across the stud 210 and the beams 12L and 12U.

Moreover, the stud 110 is installed between the upper and lower beams 12L and 12U in a state where prestress is introduced into the stud 210, and the ends 212L and 212U of the stud 210 in which the steel wire end portion 252L and the first convex portion 152U are formed. And the joints 220L and 120U capable of transmitting both axial force and shearing force by filling and solidifying the grout material G between the beams 12L and 12U having the second recesses 174L and 174U formed therein. Easily formed.

Then, by releasing the prestress introduced into the stud 210, the stud 210 installed later can surely and constantly bear the vertical load. Therefore, the studs 210 to be installed later can effectively reinforce the frame 16.

Further, in the present embodiment, when the grout material G is solidified, the heater wire is heated to raise the temperature of the grout material G and accelerate the hydration reaction of the grout material G. Therefore, the strength of the grout material G is improved and the curing period is shortened.

<Other>
The present invention is not limited to the above embodiment.

For example, in the stud 210 of the second embodiment, the extension mechanism 310 is provided on the lower side, but it is not limited to this. The extension mechanism 310 may be provided on the upper side. That is, the studs 210 may be installed upside down from the above embodiment. In addition, the stud 210 of the second embodiment is a self-compression bonding mechanism in which the steel tube 230 is provided at the central portion in the axial direction, but the invention is not limited to this. The self-compression bonding mechanism may be provided only at the ends of the studs.

Further, for example, in the above-described embodiment, the studs 110 and 210 are installed between the beams 12L and 12U, but the present invention is not limited to this. The studs 110 and 210 may be installed between structural members other than the beams 12L and 12U, for example, between the slab and the beam or between the slab and the slab.

Further, for example, the grout material G and the studs 110 and 210, which are an example of the filler that configures the joints 120L, 120U, and 220L of the above-described embodiment, are ultra-high-strength concrete (for example, APC (registered trademark) of Fc300). However, the material is not limited to this. It may be composed of concrete other than ultra-high strength concrete or other materials.

Further, for example, the grout material G, which is an example of the filler forming the joints 120L, 120U, and 220L of the above-described embodiment, has the same strength as the studs 110 and 210, but is not limited to this. A filler made of another material may be used as long as it has the same strength as that of the studs. Alternatively, it may be a filler having a strength higher than that of the studs or a filler having a strength lower than that of the studs.

Further, for example, in the above-described embodiment, the heater wire is embedded in the joints 120 and 220 to generate heat to raise the temperature of the grout material G and promote the hydration reaction, but the present invention is not limited to this. The temperature of the filler may be raised by a method other than the method of burying the heater wire. Alternatively, when it is not necessary to accelerate the hydration reaction, the temperature of the filler does not have to be raised by a temperature raising means such as a heater wire.

Further, for example, a plurality of studs 110 and 210 may be provided in the frame 16. When the plurality of studs 110 and 210 are provided, the plurality of studs 110 and 210 may be arranged close to each other or bundled. Furthermore, when a plurality of studs 110 and 210 are arranged close to each other or bundled, the joint may be integrally constructed (a plurality of studs 110 and 210 may be joined to one joint). Also, a plurality of joints may be provided in one second recess.

Further, in the above-described embodiment, the second concave portion 174 of the beam 12 (the second convex portion 172 of the joint portions 120 and 220) is larger than the outer shape of the studs 110 and 210, but the present invention is not limited to this. The second concave portion 174 of the beam 12 (the second convex portion 172 of the joint portions 120 and 220) may be the same as or smaller than the outer shape of the studs 110 and 210.

Further, the present invention can be applied to columns other than the studs 110 and 210. Further, the material may be other than concrete.

Further, for example, in the above-described embodiment, the first convex portion is provided at the end portion of the pillar (stud 110, 210) and the first concave portion is provided at the joint portion, but the present invention is not limited to this. You may provide a 1st recessed part in the edge part of a pillar (stud 110, 210), and may provide a 1st convex part in a junction part. Similarly, in the above-described embodiment, the second convex portion is provided in the joint portion and the second concave portion is provided in the structural member (beams 12L, 12U), but the present invention is not limited to this. You may provide a 2nd recessed part in a joint part and may provide a 2nd convex part in a structural member (beam 12L, 12U). Further, the first convex portion and the second convex portion may be minute convex portions formed by shining, reinforcing bars, post-installed anchors, studs, and the like. Further, for example, the column main bar 114 may be projected to form the first convex portion.

Further, for example, in the above embodiment, the joining structure of the present invention is applied to both the upper end and the lower end of the pillar (stud 110, 210), but the present invention is not limited to this. The joining structure of the present invention may be applied to only one of the upper end and the lower end of the pillar (stud 110, 210).

Further, for example, in the above embodiment, the notch 126 is formed in the joints 120 and 220 to fill the sealant 128, but the notch 126 and the sealant 128 may be omitted.

Furthermore, the present invention can be implemented in various modes without departing from the scope of the present invention. The plurality of embodiments can be implemented in combination as appropriate.

12L beam (an example of structural member)
12U beam (an example of structural member)
50 jack 110 stud 112L end 112U end 120L joint 120U joint 150L first shear force transmission mechanism (an example of first shear force transmission means)
150U second shear force transmission mechanism (an example of second shear force transmission means)
152L 1st convex part 152U 1st convex part 154L 1st recessed part 154U 1st recessed part 170L 2nd shear force transmission mechanism (an example of 2nd shear force transmission means)
170U Second shear force transmission mechanism (an example of second shear force transmission means)
172L 2nd convex part 172U 2nd convex part 174L 2nd recessed part 174U 2nd recessed part 210 stud 212L end part 212U end part 220L joint part 250L 2nd shear force transmission mechanism (an example of 2nd shear force transmission means)
252L steel wire end (an example of the first protrusion)
254L First recess
G grout (an example of filler)

Claims (3)

Installing a jack between the upper and lower structural members and jacking up the upper structural member;
A step of installing a pillar between the upper and lower structural members,
Filling a filler between at least one of the upper and lower ends of the pillar and the structural member;
A step of jacking down and removing the jack after the filling material is solidified;
Method of joining columns with. A step of installing a prestressed column between the upper and lower structural members,
Filling a filler between at least one of the upper and lower ends of the pillar and the structural member;
Releasing the pre-stress of the columns after the filling material has solidified,
Method of joining columns with. A joint formed by solidifying the filler,
First shearing force transmitting means for transmitting shearing force between the end portion and the joint portion,
Second shearing force transmitting means for transmitting shearing force between the structural member and the joint portion,
The method for joining pillars according to claim 1 or 2, further comprising: