JP2010133093A - Joint structure of bar-like member - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To increase the strength including the compressive strength of a joint part by filling the defective section of the joint part of a column with a solidifying agent. <P>SOLUTION: Storage parts 20, 21 capable of storing a joint metal fitting 1 from the lower surface (joint end surface) 16 of the column (second bar-like member) 15 are formed. The joint metal fitting 1 is fixed to the upper surface 12 of a base (first bar-like member) 11 with screws 28 (a). The column 15 is placed on the upper surface 12 of the base 11, the joint metal fitting 1 (including the heads of the screws 28) are stored in the storage parts 20, 21, and the gap 26 is formed in the storage part 20 (b). Next, a drift pin 29 extending through a pin hole 23 of the column 15 is inserted through the joint metal fitting 1. A liquid solidifying agent 31 is injected into the gap 26 inside the storage part 20 to constitute the joint structure 40 of the base 11 and the column 15 after the solidification (c). <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joining structure of rod-shaped members such as a pillar and a beam, a beam and a girder, as well as a base and a column mainly applied to a wooden structure.

Conventionally, when joining the lower surface of the pillar to the upper surface of the base,
(1) Fix the connection hardware on the top surface of the anchor bolt that penetrates the base. Alternatively, a screw screw penetrating the connection hardware is screwed into the base, and the connection hardware is fixed to the base.
(2) A notch is formed in the central portion of the lower surface of the column to accommodate the connection hardware, and a through hole is formed through the accommodating portion from the side surface of the column.
(3) The lower surface of the column is placed on the upper surface of the base, the connection hardware is accommodated in the housing portion of the column, and the peripheral portion of the lower surface of the column is brought into contact with the upper surface of the base.
(4) Insert a pin from the through hole on the side surface of the column, pass the pin through the through hole of the connection hardware, reach the through hole on the other side, and fix the connection hardware to the column.
(5) As described above, the base and the pillar were fixed via the connection hardware (FIG. 1). In this case, the connection hardware has various structures (for example, Patent Documents 1 and 2).
JP2007-186554 JP 2002-303004 A

  In the case of the prior art, a gap is formed between the surface of the joint metal and the inner surface of the housing portion in consideration of the head of the bolt to which the joint metal is attached. Accordingly, a cross-sectional defect is generated as much as the gap, and there is a possibility that stress concentration may occur in the vicinity of the accommodating portion depending on the action of an external force.

In particular, when an excessive external force that presses the column downward toward the base is applied, there is a possibility that the column may be cracked in the vicinity of the accommodating portion or in the through hole portion.

  However, according to the present invention, the liquid curing material is filled in the accommodating portion and solidified, so that the above-mentioned problems are solved.

That is, the present invention has a structure in which the lower surface of the column is bonded to the upper surface of the base, and is configured as follows.
(1) Fix the joint hardware at the column joint position on the upper surface of the base.
(2) A lower surface of the column is cut away to form a receiving portion that can receive the joint hardware.
(3) The lower surface of the column is brought into contact with the upper surface of the base to erect the column and accommodate the joint hardware in the accommodating portion.
(4) A fixing pin is inserted through the through hole of the metal fitting through the pillar.
(5) A liquid solidifying agent is injected into the housing portion to fill a gap between the housing portion and the bonding hardware.

Moreover, in the above, it is the joining structure of the rod-shaped member characterized by having been comprised as follows.
(1) The housing part is fixed to the lower surface of the base and covers at least the upper part of the connection hardware.
(2) Surfaces other than the accommodating portion on the lower surface of the pillar are placed on the upper surface of the base directly or via a packing material. Moreover, in the above, it is the joining structure of the rod-shaped member characterized by having been comprised as follows.
(1) Fixing to the upper surface of the housing, the upper surface of the base, and the lower surface of the connection hardware fixed to the base, covering at least the upper part of the connection hardware,
(2) Surfaces other than the accommodating portion on the lower surface of the pillar are placed on the upper surface of the base directly or via a packing material.

Furthermore, this invention is a structure for fixing the end face of the second rod-shaped member to the side surface of the first rod-shaped member, and is a rod-shaped member joining structure configured as follows.
(1) On the side surface of the first rod-shaped member, a joint metal is fixed at the joining position of the second rod-shaped member.
(2) The joint end surface of the second rod-shaped member is cut out to form a housing portion that can house the joint hardware.
(3) The joining end surface of the second rod-shaped member is brought into contact with the side surface of the first rod-shaped member, the second joining member is erected, and the joint hardware is attached to the second rod-shaped member. Store in the storage unit.
(4) A fixing pin is inserted through the second rod-shaped member and through the through hole of the metal joint.
(5) A liquid solidifying agent is injected into the housing part to fill a gap between the housing part and the metal joint.

  The combination of the first rod-shaped member and the second rod-shaped member in the above is effective in the case of the base and the column, but is arbitrary. The joint end surface of the second rod-shaped member is joined to the side surface (including the upper surface and the lower surface) of the first rod-shaped member, and a compressive load acts on the side surface of the first rod-shaped member from the joint end surface of the second rod-shaped member. The mouth is preferred. For example, the present invention can be applied to a beam-column upper end, a beam-column lower end, a column-beam, a beam-small beam, and the like.

  This invention is used when forming a housing portion for housing a connection hardware fixed to a “first rod-shaped member” including a base by cutting out a lower surface of a “second rod-shaped member” including a column. Then, the liquid solidifying agent is injected and solidified in the gaps other than the connection hardware in the accommodating portion. Therefore, since the cross-sectional defect | deletion of an accommodating part can be compensated, since the integrity of a "2nd rod-shaped member", a joining metal fitting, and a "1st rod-shaped member" is improved, the intensity | strength of a junction part can be raised. In particular, there is an effect that the compressive strength from the “second rod-shaped member” to the “first rod-shaped member” can be increased.

The metal joint 1 is formed in a substantially T shape in which a second joint plate 6 protrudes from the approximate center of the first joint plate 2.
From the lower surface (joint end face) 16 of the column (second rod-like member) 15, a first housing portion 20 that can house the first joint plate 2 and a second housing portion 21 that houses the second joint plate 6 are formed. . The first bonding plate 2 of the bonding hardware 1 is fixed to the upper surface 12 of the base (first rod-shaped member) 11 with screws 28 and 28. The column 15 is placed on the upper surface 12 of the base 11, and the joint hardware 1 (including the head of the screw 28) is placed in the housing portions 20 and 21 ((b) in FIG. 1). A gap 26 is formed in the portion 20 (FIG. 1B).
Subsequently, the drift pin 29 penetrating the pin hole 23 of the column 15 is penetrated through the first bonding plate 2 to fix the column 15 and the metal fitting 1 (FIGS. 2C and 2D).
Subsequently, the liquid solidifying agent 31 is injected into the gap 26 in the first storage unit 20. When the liquid solidifying agent 31 is solidified, the gap 26 is filled to form the joint structure 40 between the base 11 and the pillar 15 (FIG. 1C).

[1] Bonding hardware 1

The metal joint 1 is formed in a substantially T-shape in which a second joint plate 6 inserted from the lower surface of the column 15 protrudes at a substantially center of the first joint plate 2 that contacts the upper surface 12 of the base 11. On the both sides of the first bonding plate 2 with the second bonding plate 6 interposed, screw through holes 4 and 4 are formed. Moreover, the through-hole 8 which penetrates a pin is formed in the 2nd joining board 6, and the latching hole 9 (through-hole) which can carry out the penetration lock of the pin by notching one side is formed.
The metal joint 1 is formed by bending a steel plate having the first joint plate pieces 3, 3a and the second joint plate pieces 7, 7a. In addition, the structure and manufacturing method of the joining hardware 1 are arbitrary.

[2] Base 11 (first rod-like member)

  The base 1 is connected to a concrete foundation (not shown) with anchor bolts (not shown) embedded in a concrete foundation (not shown).

[3] Pillar 15 (second rod-shaped member)

The column 15 forms a planar first housing part 20 that can accommodate the first joining plate 2 upward from the lower surface 16, and accommodates the second joining plate 6 upward from the first housing part 20. The 2nd accommodating part 21 to be formed is formed. Moreover, the packing 24 is affixed on the remaining part of the 1st accommodating part 20 with the lower surface 16 of the pillar 15 (FIG. 2 (a) (b)).
Pin holes 23, 23 penetrating the second accommodating portion 6 are formed from the side surface 17 of the column 15 toward the opposing side surface 17 a. The pin holes 23, “23” are formed so as to coincide with the through holes 8 and the locking holes 9 of the metal joint 1 in the joined state.

[4] Liquid solidifying agent 31

As the liquid solidifying agent 31, for example, a cement-based non-shrink material using a special expansion material, which has the following properties at a test temperature of 20 ° C. and a mixing water amount of 18%, is adopted.
・ Softness (by J14 funnel) 8 seconds ・ Blouzing rate 0%
・ Compressive strength (1 day) 26.8 N / mm ²
・ Compressive strength (7 days) 51.1 N / mm ²
・ Compressive strength (28 days) 60.3 N / mm ²
In addition, although the thing of the said property is preferable, the liquid solidifying agent 31 is not restricted to this. Also, it is optional for cement type, resin type and the like.

[5] Joining structure 40

(1) On the upper surface 12 of the base 11, the joint hardware 1 is placed in accordance with the column joining position, and screws 28 and 28 are driven from the through holes 4 and 4 toward the base 1, and the base 11 and the joint hardware are placed. 1 is fixed. In this state, the head of the screw 28 protrudes upward from the upper surface of the first joining plate 2 of the joint metal 1 (FIGS. 2A and 2B, FIG. 1A).

(2) Subsequently, the column 15 is lowered from above the base 11, and the column 15 is placed on the upper surface 12 of the base 11 so that the joint hardware 1 is accommodated in the housing portions 20 and 21 (FIG. 1B). ). In this state, the lower surface 16 (packing 24) of the column 15 is placed on the upper surface 12 of the base 11, and the second bonding plate 6 of the metal joint 1 is fitted and housed in the second housing portion 21. The first joint plate 2 and the head of the screw 28 of the joint hardware 1 are housed in the first housing portion 20, the upper surface of the first joint plate 2 and the top of the screw 28, and the first housing portion 20. A gap 26 is formed between the inner surface and the inner surface (FIG. 1B).

(3) Subsequently, since the through holes 8 and the locking holes 9 of the first joining plate 2 communicate with the pin holes 23 and 23 of the pillar 15, the drift pins 29 and 29 are inserted from the pin holes 23 and 23, The through hole 8 and the locking hole 9 (second accommodating portion 21) are respectively penetrated to reach the pin hole 23 on the other side. (FIGS. 2C and 2D). In this state, the base 11 and the column 15 are joined via the joint hardware 1.

(4) Subsequently, the liquid solidifying agent 31 is injected into the gap 26 in the first housing portion 20. When the liquid solidifying agent 31 is solidified, the gap 26 is filled to form the joint structure 40 between the base 11 and the pillar 15 (FIG. 1C).

[6] Test example

(1) Specimen The materials shown in Table 1
・ The base 11 of 120 * 120mm,
・ 120 × 120mm pillar 15
The structure in which the direction of the connecting hardware 1 (that is, the direction in which the accommodating portions 20 and 21 are pulled out) is orthogonal to the direction of the axis 11a of the base 11 is “vertical”, and the direction in which the parallel parts 1 are parallel is “horizontal”. The test specimens HYC (FIG. 4A), HY2 (FIG. 4B), PTC (FIG. 5A), and PT (FIG. 5B) were tested. The difference between HYC and HY and the difference between PTC and PT is the presence or absence of a liquid solidifying agent, which is the difference between the conventional example and the present invention.
The connection hardware 1 has the structure shown in the embodiment (FIGS. 2A and 2B).
As the liquid solidifying agent 31, the cement-based non-shrinkage material of the above-described example was used at a normal water cement ratio.

(2) Test Method The displacement of the lower surface 16 of the column 15 was measured by gradually applying a compressive load (a downward load toward the base) to the column 15.

(3) Test results The displacement-load curves are shown in FIGS. 6 (a) and 6 (b) and FIGS. 7 (a) and 7 (b).
In HY2 and PT into which the liquid solidifying agent was injected as an example of the present invention, the maximum load was greatly increased as compared with the conventional example without the liquid solidifying agent.
In particular, a large load can be borne at a stage where the displacement is small (displacement of about 5 mm) (FIGS. 6 and 7). Further, for example, comparing the load at the stage of 2 mm displacement, it can be seen that a large load can be borne by injecting the liquid solidifying agent 15 (Table 1, FIG. 6, FIG. 7).

[7] Other embodiments

(1) In the said Example, the structure of the joining metal fitting 1 is not restricted to the said example, If it is a structure which can be fixed to the base 11 and is accommodated in the accommodating part 20 formed in the pillar 15 (FIG. Not shown).

(2) Moreover, in the said Example, although applied to the base 11 as a 1st rod-shaped member and the pillar 15 as a 2nd rod-shaped member, it is also applicable to another joining site | part. For example, FIG. 3 shows an example in which the column 15 is selected as the first rod-shaped member for fixing the metal joint 1 and the second rod-shaped member is the beam 35.
In this case, the connection hardware 1 has a substantially T-shape in which the second joint plate 6 inserted into the joint end surface 37 of the beam 35 protrudes from the approximate center of the first joint plate 2 fixed to the side surface 17 of the column 15. Formed. On the joint end surface 37 of the beam 35, the accommodating portions 20 and 21 corresponding to the connection hardware 1 are formed as in the above embodiment (FIGS. 3A and 3B).
Subsequently, as in the above-described embodiment, the connection hardware 1 is fixed to the side surface 17 of the column 15 with screws 28 and 28, the joint end surface 37 of the beam 35 is brought into contact with the side surface 17 of the column 15, The connection hardware 1 is accommodated in 21. Subsequently, the drift pin 29 penetrating the pin hole 36 of the beam 35 is caused to penetrate the through hole 8 of the connection hardware 1 (FIGS. 3A and 3B). Subsequently, the housing portion 20 (or further the housing portion 21) is filled with the liquid solidifying agent 31 to constitute the joining structure 40 of the present invention (FIG. 3C).

BRIEF DESCRIPTION OF THE DRAWINGS It is the longitudinal cross-sectional view in the middle of construction of the Example of this invention, (a) is the state which fixed the metal fitting to the base, (b) is the state which mounted the pillar on the base, (c) is inserting the drift pin. And the state in which the liquid curing agent is injected. Similarly, in the embodiment of the present invention, (a) is a schematic longitudinal sectional view before joining columns, (b) is a longitudinal sectional view taken along line AA in (a), and (c) is after joining the columns. (D) is the longitudinal cross-sectional view in the BB line of (c). In another embodiment of the present invention, (a) is a schematic longitudinal sectional view before injecting the liquid curing agent, (b) is a schematic transverse sectional view before injecting the liquid curing agent, and (c) is liquid. It is the schematic cross-sectional view after inject | pouring a hardening | curing agent. The perspective view of the test body of the test example of this invention is represented, (a) is a prior art example, (b) is this invention. The perspective view of the test body of the other test example of this invention is represented, (a) is a prior art example, (b) is this invention. It is a graph (displacement-load) of the test example of this invention, (a) represents the case of the test body of Fig.4 (a), (b) represents the case of the test body of FIG.4 (b), respectively. It is a graph (displacement-load) of the other test example of this invention, (a) represents the case of the test body of Fig.5 (a), (b) represents the case of the test body of FIG.5 (b), respectively.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Joining metal 2 Joining metal 1st joining plate 4 1st joining plate through-hole 6 Joining metal 2nd joining plate 8 Second joining plate through-hole 9 Locking hole (through-hole) of 2nd joining plate
DESCRIPTION OF SYMBOLS 11 Base 11a Base axis | shaft 12 Base upper surface 15 Column 16 Column lower surface 17 Column side surface 20 Column 1st accommodating part 21 Column 2nd accommodating part 23 Column pin hole 24 Column packing 26 Gap 28 Screw 29 Drift pin 31 Liquid solidifying agent 35 Beam 36 Beam pin hole 37 Beam end face of beam

Claims (4)

A structure for joining rod-like members to the upper surface of a base, which is constructed as follows.
(1) Fix the joint hardware at the column joint position on the upper surface of the base.
(2) A lower surface of the column is cut away to form a receiving portion that can receive the joint hardware.
(3) The lower surface of the column is brought into contact with the upper surface of the base to erect the column and accommodate the joint hardware in the accommodating portion.
(4) A fixing pin is inserted through the through hole of the metal fitting through the pillar.
(5) A liquid solidifying agent is injected into the housing portion to fill a gap between the housing portion and the bonding hardware. The rod-shaped member joining structure according to claim 1, which is configured as follows.
(1) The housing part is fixed to the lower surface of the base and covers at least the upper part of the connection hardware.
(2) Surfaces other than the accommodating portion on the lower surface of the pillar are placed on the upper surface of the base directly or via a packing material. The rod-shaped member joining structure according to claim 1, which is configured as follows.
(1) Fixing to the upper surface of the housing, the upper surface of the base, and the lower surface of the connection hardware fixed to the base, covering at least the upper part of the connection hardware,
(2) Surfaces other than the accommodating portion on the lower surface of the pillar are placed on the upper surface of the base directly or via a packing material. A structure for fixing the end faces of the second bar-shaped member to the side surface of the first bar-shaped member, which is structured as follows.
(1) On the side surface of the first rod-shaped member, a joint metal is fixed at the joining position of the second rod-shaped member.
(2) The joint end surface of the second rod-shaped member is cut out to form a housing portion that can house the joint hardware.
(3) The joining end surface of the second rod-shaped member is brought into contact with the side surface of the first rod-shaped member, the second joining member is erected, and the joint hardware is attached to the second rod-shaped member. Store in the storage unit.
(4) A fixing pin is inserted through the second rod-shaped member and through the through hole of the metal joint.
(5) A liquid solidifying agent is injected into the housing part to fill a gap between the housing part and the metal joint.

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