JP2008156909A - Connection structure between concrete filled steel pipe column and steel member - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a connection structure between a concrete filled steel pipe column and steel members, which contributes to simplified connection work, and to strengthened fixing force between an anchor portion of a rod-like anchoring fitting and concrete in a steel pipe column, and to provide the rod-like anchoring fitting. <P>SOLUTION: When the steel members 2 are connected to a plurality of side surfaces of the steel pipe column 1 at the same level, the one or more rod-like anchoring fittings 3 each having the anchor portion 3a and an external anchoring portion 3c having an angle adjusting mechanism on the outside, are inclinedly inserted into bolt holes formed in the steel pipe column 1 from the outside. Then the anchoring fittings are fixed in the concrete 6 inside the steel pipe column over a length of 1/2 or more a distance between opposed surfaces in the steel pipe column in a manner avoiding interference between the anchor portions 3a, and the fixing force of each anchor portion 3a is strengthened, to thereby fix the external anchoring portion 3c to the external surface of the steel member 2 abutting on the steel pipe column 1. Further formation of an elliptical collar on the anchor portion 3a (and formation of an elliptical slot in the steel pipe column) may be taken into consideration in order to strengthen an anchoring function. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention is a structure for joining a concrete-filled steel pipe column and a steel member, which is applied when, for example, a steel member such as a steel beam or a joint hardware is joined to a concrete-filled square steel column when constructing a steel structure building. And a bar-shaped fixing metal used in this joining structure.

As a non-welded joint structure between a square steel pipe column and a steel beam such as an H-shaped steel beam, for example, a bolt using a T-shaped joint hardware produced by cutting out from an H-section steel, welding a plate, or casting. Joining structures are known. With this joint structure, when T-shaped metal parts are bolted to steel pipe columns, complex work such as using special bolts, inserting bolts from the inside of the steel pipe columns to protrude outside, and fastening inside the steel pipe columns In addition, the number of bolts used and the amount of metal fittings to be used are also large, which increases the material, processing cost, and construction burden.
The T-shaped hardware is composed of a flange that abuts on the outer surface of the steel pipe column and is bolt-joined, and a web that abuts on the flange of the steel beam and is bolt-bonded. The flange of the T-shaped hardware is an out-of-plane bending resistance mechanism. In order to transmit the beam flange stress transmitted from the web of the T-shaped hardware to the column flange, it is necessary to secure a bending resistance by increasing the thickness compared to the web, and the burden of material costs and processing costs is large.
For this reason, measures are taken to reduce these burdens.

For example, when a steel pipe column is a concrete-filled steel pipe column and a joining hardware is joined to the steel pipe column, it has been proposed to use the filled concrete inside the column as a joining material. For example, Patent Document 1 and Patent Document 2 have the following proposals.
(1) An anchor function is given to the tip of the bolt that joins the T-shaped hardware and the column, and this bolt is inserted into the steel tube column and the bolt hole of the T-shaped hardware to fill the steel tube column with the anchor at the tip of the bolt.・ Fixed to solidified concrete and bolted with a steel pipe column and a T-shaped metal fitting in contact with the outer surface.
(2) Using screw rebars, the steel pipe column side part is fixed to the internal concrete, and the T type metal part side part is inserted into the steel pipe column and the bolt hole of the T type metal metal in contact with the outer surface thereof. T-shaped hardware is bolted. Etc. have been proposed.

However, in these joint structures, both steel pipe columns and T-shaped hardware are bolted together, and bolts are inserted from the inside of the steel pipe columns and nuts are held on the inside of the steel tube columns. Can not be reduced.
In addition, when using screw rebars, etc., when joining T-shaped hardware to multiple side surfaces of the same level of steel pipe columns, the bolts from the side surfaces interfere with each other inside the steel tube columns, so The fixing length with concrete is ½ or less of the distance between opposing sides in the steel pipe column, and the fixing power with concrete cannot be sufficiently secured.
Generally, the flange of a T-shaped hardware is bolted to a steel pipe column, so the bending resistance is ensured because the beam flange stress transmitted from the T-shaped hardware web is transmitted to the column flange by an out-of-plane bending resistance mechanism. Therefore, as a result of securing the bending resistance by increasing the flange thickness of the steel pipe column and the T-shaped metal fitting, there is a problem that the increase in the weight of the steel pipe column and the T-shaped metal fitting cannot be sufficiently mitigated.
In order to solve such problems, there is a demand for a joint structure between a concrete-filled steel pipe column and a steel member that can be inserted into the bolt hole of the steel pipe column from the outside to further enhance the anchor effect. Yes.
JP 2003-301514 A JP 2003-343008 A

  The present invention relates to an anchor for a rod-shaped fixing hardware in a joining structure of a concrete-filled steel tube column and a steel member for joining a steel member to a steel tube column using a rod-shaped fixing metal having an anchor portion to be inserted from the outside of the steel tube column. Strengthening the anchoring force between the steel pipe column and the steel member (meaning the part that anchors to the concrete in the steel pipe column and means the anchor function; hereinafter referred to as “anchor part”) and the concrete, streamlines stress transmission between the steel pipe column and the steel member In addition to reducing the weight of steel members, concrete-filled steel tube columns and steel that can simplify the joining work between steel pipe columns and steel members that abut on the outer surface, and reduce material, processing costs, and construction cost burdens. The present invention provides a joining structure for manufacturing members and a rod-shaped fixing metal used in the joining structure.

The present invention has been made to solve the above-described problems, and has the following (1) to (6).
(1) The invention of claim 1 has an anchor portion and an external fixing portion, and means a fixing angle adjusting mechanism (a mechanism for adjusting the fixing angle of the anchor portion to concrete. It is a joint structure of a concrete-filled steel pipe column and a steel member that joins a steel member to a plurality of side surfaces of the same level of the steel pipe column using a bar-shaped fixing hardware having an adjustment mechanism. The length of the anchor part of the fixing metal is set to be 1/2 or more of the distance between the opposing surfaces in the steel pipe column, and this rod-shaped fixing metal is inserted into the bolt hole of the steel pipe column from the outside, and the steel pipe is adjusted by adjusting the fixing angle. While avoiding the interference between the anchor parts of each bar-shaped fixing metal in the column, the anchor part of each bar-shaped fixing metal is fixed to the concrete filled and solidified in the steel pipe column, and the external fixing part of each bar-shaped fixing metal is fixed. Of steel members abutting against steel pipe columns A junction structure of a concrete filled steel tube column to the steel member, characterized in that fixed on the surface side.
(2) According to the invention of claim 2, in the invention of claim 1, the anchor portion of the rod-shaped fixing metal includes one or more oval ridges (oval, ellipse or similar ridges thereof), The steel pipe column is provided with a long hole having a long diameter in the vertical direction through which the oval ridge can be inserted, and the rod-shaped fixing hardware having the oval ridge formed therein. It is a joint structure of a concrete-filled steel pipe column and a steel member characterized in that the inner anchor portion is inserted into a long hole of the steel pipe column and fixed to concrete filled and solidified in the steel pipe column.

(3) The invention of claim 3 is a joining structure of a concrete-filled steel pipe column and a steel member for joining a steel member to a steel pipe column using a rod-shaped fixing hardware having an anchor part and an external fixing part. One or more oval rods are formed in the anchor portion of the rod-shaped fixing metal or more, and the steel pipe column is provided with a long bolt hole having a long diameter in the longitudinal direction through which the oval rod can be inserted, Insert the rod-shaped fixing hardware into the long hole of the steel pipe column from the outside, fix the anchor part formed with the above-mentioned oval rod to the concrete filled and solidified in the steel pipe column, and fix the external fixing part of the rod-shaped fixing metal Is a joint structure of a concrete-filled steel pipe column and a steel member, characterized by being fixed on the outer surface side of the steel member.

(4) The invention of claim 4 is a rod-shaped fixing hardware used in the joint structure of the concrete-filled steel pipe column and the steel member of the invention of claim 1 or 2, and is inserted into the bolt hole of the steel pipe column from the outside. Anchored with the concrete in the steel pipe column, the anchor length is more than 1/2 of the distance between the opposing surfaces in the steel pipe column, and the outer surface of the steel member in contact with the steel pipe column This is a rod-shaped fixing hardware for a joint structure of a concrete-filled steel pipe column and a steel member, characterized in that it has an external fixing part fixed on the side, and a fixing angle adjusting mechanism is formed in this external fixing part.
(5) The invention of claim 5 is a rod-like fixing hardware used in the joint structure of the concrete-filled steel pipe column and steel member of the invention of claim 2, and is inserted into the bolt hole of the long hole of the steel pipe column from the outside. An anchor portion that is fixed to the concrete in the steel pipe column and has a fixing length of ½ or more of the distance between the opposing surfaces in the steel pipe column and forming a plurality of oval ridges, and the steel pipe column A concrete-filled steel pipe column and steel made by having an external fixing part that is inserted into a hole of a steel member that is in contact with the steel member and fixed on the outer surface side thereof, and a fixing angle adjusting mechanism is formed in the external fixing part. It is a rod-shaped fixing metal for a joining structure of members.
(6) The invention of claim 6 is a rod-like fixing hardware used in the joint structure of the concrete-filled steel pipe column and the steel member of the invention of claim 3, and is inserted into the long bolt hole of the steel pipe column from the outside. And an anchor part formed with one or more oval ridges to be fixed to the concrete in the steel pipe column, and an external fixing part that is inserted into the hole of the steel member in contact with the steel pipe column and fixed on the outer surface side thereof This is a rod-like fixing hardware for a joint structure of a concrete-filled steel pipe column and a steel member.

The inventions of claims 1 and 2 of the present invention are effective when applied to a joint structure of a steel member and a concrete-filled steel tube column that joins a steel member to a plurality of side surfaces at the same level of the steel tube column. According to the first aspect of the present invention, the anchor portion of the rod-shaped fixing hardware is inserted into the steel pipe column from the outside, and the distance between the opposing surfaces in the steel tube column is adjusted while adjusting the fixing angle with the concrete and avoiding interference between the anchor portions. It can be fixed to concrete in a region having a length of 1/2 or more. Thereby, fixing power with concrete can be remarkably strengthened. In addition, since the external fixing portion can be fixed to the steel member that is in contact with the steel pipe column, a strong joint structure between the concrete-filled steel pipe column and the steel member can be easily obtained.
According to the second aspect of the present invention, an oval ridge is formed on the anchor portion of the rod-shaped fixing metal, and the anchor function is further strengthened to fix the concrete to the concrete. Can be remarkably strengthened.

In the invention of claim 3, as in the invention of claim 2, the anchor function is strengthened by forming an oval ridge in the anchor portion of the rod-like fixing metal, and inserted into the steel pipe column from the outside to be fixed to the concrete. By doing so, the fixing force with concrete can be strengthened by an oval wrinkle effect.
However, the invention of claim 2 is not limited to the application in the case of joining steel members to a plurality of side surfaces of the same level of the steel pipe column, and the anchor part of the rod-like fixing hardware is between the opposing surfaces in the steel pipe column. The difference is that fixing to concrete in a region having a length of ½ or more of the distance and adjusting the fixing angle of the rod-shaped fixing metal are not essential requirements.

According to the first, second, and third aspects of the present invention, the anchor effect of the anchor portion of the rod-shaped fixing hardware can be sufficiently strengthened, and the anchor portion is inserted into the steel pipe column from the outside to make the external fixing portion into the steel pipe column. Since fixing is performed on the outer surface side of the steel member that comes into contact, the troublesome work inside the steel pipe column is not required, and in the case of on-site construction, the joining work is greatly facilitated by the work on the outside side.
In addition, since the anchor effect of the anchor portion of the rod-shaped fixing hardware can be sufficiently strengthened, the stress from the steel member, for example, the T-shaped hardware, does not depend on the out-of-plane bending resistance of the steel pipe column flange as in the conventional case, and Steel members (eg, T-shaped hardware) joined to the steel pipe column can be replaced with the conventional joint structure because the axial force of the rod-type fixing hardware with sufficient backup of the concrete can be rationally transmitted to the steel pipe column. Compared with this, it is possible to achieve an effect that it can be made much smaller and lighter.

According to the first and second aspects of the present invention, a steel member (for example, a T-shaped metal object for joining an H-shaped steel beam, an angle material, an end plate, etc.) is attached to a plurality of side surfaces of the concrete-filled steel pipe column at the same level. It is also applied when joining steel members in the shape steel materials etc.
In the present invention, this joint is a rod-shaped fixing metal (bolt-shaped but has an anchor portion fixed to concrete and uses a different fastening method from a general bolt. Is used as fixing hardware.
The bar-shaped fixing hardware includes an anchor portion and an external fixing portion, and the fixing angle adjusting mechanism is formed in the external fixing portion. The rod-shaped fixing hardware is inserted into the hole (including the long hole) of the steel pipe column from the outside, and the concrete inside the steel pipe column is ½ or more (preferably 1/2) of the distance between the opposing sides in the steel pipe column. The anchor portion is fixed in the length region of ˜1 region), and the external fixing portion is fixed on the outer surface side of the steel member in contact with the outer surface of the steel pipe column.

At this time, the interference of the anchor portion between the bar-shaped fixing hardware on the plurality of sides in the steel pipe column ("interference" in the present invention is a state in which the anchor portions of the rod-shaped fixing hardware hit each other and it becomes difficult to insert at a desired length. In this case, the fixing angle is adjusted by a fixing angle adjusting mechanism so that sufficient fixing is not difficult due to the occurrence of slight interference on the outer peripheral surface.
It is not an essential requirement that all the lengths and fixing angles (including orientations) of the rod-shaped fixing hardware are the same. These conditions can be considered to use different lengths and fixing angle conditions for each bar-shaped fixing hardware so as to function effectively according to the type, direction, size, etc. of the stress acting on each bar-shaped fixing metal. .
In this way, by sufficiently securing the length of the anchor portion of the rod-shaped fixing hardware to sufficiently secure the fixing force with the concrete in the steel pipe column, fixing the external fixing portion on the outer surface side of the steel member The steel pipe column and the steel member are easily and firmly fixed. In order to secure the fixing force to the concrete in the steel pipe column, it is preferable to form an uneven portion such as a screw or a node on the shaft portion in the anchor portion of the rod-like fixing metal. Further, in order to stably secure the fixing force of the external fixing portion, it is more preferable that a screw is formed on the outside side so that a tightening force can be applied to the concrete after fixing, and the external fixing portion can be fastened with a nut. Further, an external fixing portion that does not depend on fastening with an external nut can be considered by using a rod-shaped fixing hardware having a head formed on the outer side. In this case, the fixing angle is adjusted between the external head and the washer.

In the case where uneven portions such as screws and nodes are formed in the anchor portion of the rod-shaped fixing metal, it is difficult to form under conditions that can sufficiently secure the anchor effect because of the restriction of the bolt hole diameter of the steel pipe column.
Therefore, in the invention of claim 2, in addition to increasing the fixing length to the concrete, the anchor portion includes one or more oval shapes (an oval shape, an oval shape or a similar shape thereof). The rod-shaped fixing hardware of the invention of claim 5 further strengthening the anchor function, the steel pipe pillar hole being a long hole, and the rod-shaped fixing hardware having an oval ridge. Is inserted through the long hole of the steel pipe column and fixed to the concrete, and the fixing effect with the concrete is remarkably strengthened with the addition of the oblong wrinkle effect.
In this case, since the hole of the steel pipe column is made into a long hole, there is a concern about the influence on the proof stress of the steel pipe column and the proof stress of the joint, but according to the study by the present inventors, the long diameter of the long hole is the length of the steel pipe column. If the major axis of the long hole is about 1.5 to 3.0 times the shaft diameter of the rod-shaped fixing metal, the yield strength is not affected. When an oval ridge is formed on the anchor, only the hole of the steel pipe column is basically a long hole, but the hole of the steel member is excluded from being a long hole like the long hole of the steel pipe column. Not what you want. Here, as a preferable method of opening the long hole, for example, there is a method of making a hole in the vertical direction and scraping between the holes.

The oval ridge formed in the anchor portion of the rod-shaped fixing metal used in the invention of claim 2 is formed in a shape and size that can be inserted from the outside into the long hole of the steel pipe column.
The oval ridge formed on the anchor portion does not need to be formed symmetrically about the axis on both the long diameter side and the short diameter side. In the case of the formation angle or the major axis side, it is possible to consider decentering, changing the formation angle, or changing the size.
One or more of these oval ridges are formed. When a plurality of oval ridges are formed, and when ridges having different major axis directions and different formation angles are formed, the flange thickness of the steel pipe column (Thickness) When formed with a spacing of the above, and inserted into the long hole of the steel pipe column, the shaft of the rod-shaped fixing metal can be inserted by turning the formation angle difference between the adjacent oval ribs.
At this time, the rod-shaped fixing hardware is inserted by adjusting the angle by an angle adjusting mechanism so that interference between anchors between a plurality of side-surface fixing hardware on the steel pipe column does not occur and sufficient fixing becomes difficult. It is not an essential requirement to make all the lengths and fixing angles (including orientations) the same. It can be considered that these conditions are properly used for each bar-shaped fixing hardware so as to function effectively according to the type, direction, size, etc. of the stress acting on each bar-shaped fixing metal.

The angle adjusting mechanism for adjusting the fixing angle of the rod-shaped fixing metal according to the first and second aspects of the present invention is basically formed between the nut or the nut and the washer or between the washer and the washer serving as the external fixing part of the rod-shaped fixing metal. It is formed by engagement between the concave-convex curved surface seats (uneven partial spherical seats). The curvature of the concave-convex curved surface seat in this case has no hindrance to the adjustment of the fixing angle, and after the angle adjustment, a sufficient stress is stably provided between the joint surfaces with the steel member according to the insertion angle of the rod-shaped fixing hardware. Set as long as transmission is possible.
Adjustment of the fixing angle of this rod-shaped fixing hardware is performed on the outside of the steel pipe column, and the adjustment width is the number of joint surfaces of steel members in the steel pipe column, the number of used parts on each surface, arrangement, and rod fixing For example, in the case of 2 to 4 side surfaces, each anchor portion is a steel pipe by adjusting the angle in a three-dimensional direction, for example, in the range of about 5 to 10 degrees, although it varies depending on the shaft diameter of the hardware, the thickness and the hole diameter of the steel pipe column and the steel member. By avoiding interference in the pillar, it is possible to secure sufficient fixing strength by securing the fixing force with concrete.
In order to enable this fixing angle adjustment, the hole diameter of the steel pipe column and the steel member is increased by about 10 to 15% from the normal case. However, when an oval ridge is provided in the anchor portion, an oval long hole through which the oval ridge can be inserted is used, and the major axis is about 1.5 to 3.0 times the shaft diameter of the rod-shaped fixing hardware. It is.
In the first and second aspects of the invention, the rod-shaped fixing hardware is made longer than the conventional one, and the stress from the steel member is transmitted to the steel pipe column through the concrete, so that sufficient fixing force with the concrete is secured. Therefore, it is preferable that the steel pipe column and the steel member are made of a material having higher strength than that used in a conventional joining structure in which the bolt and nut are directly fastened.

The invention according to claim 3 is a joining structure of a concrete-filled steel pipe column and a steel member for joining a steel member to a steel pipe column using a rod-like fixing metal having an anchor part and an external fixing part, and the same structure as that of the concrete-filled steel pipe pillar. The application is not limited only when steel members are joined to a plurality of side surfaces of the level.
The invention of claim 3 is an internal structure formed by using one or more of the rod-shaped fixing hardware of the invention of claim 6 for each joint portion, inserting the rod-shaped fixing metal from the outside into the long hole of the steel pipe column, and forming the oval rod. 6. The rod-shaped fixing hardware according to claim 5, wherein the side anchoring portion is fixed to concrete filled and solidified in a steel pipe column, and the external fixing portion of the rod-shaped fixing metal is fixed on the outer surface side of the steel member. It has the same contents as the second invention.
However, in order to fix the anchor part to the concrete in a region having a length of 1/2 or more of the distance between the opposing sides in the steel pipe column, the anchor part of the bar-type fixing metal in the steel pipe column is adjusted by adjusting the fixing angle of the bar-type fixing metal. This is also different from the invention of claim 2 in that it is not an essential requirement to avoid the interference.

[Example 1]
Embodiment 1 of the joint structure of a concrete-filled steel pipe column and a steel member according to claim 1 will be described with reference to FIGS. The steel member in the first embodiment is a pair of upper and lower T-shaped hardware (split tees) used for joining an H-shaped steel beam to a steel pipe column. (Hereinafter referred to as “T-shaped hardware”. Normally, a pair of upper and lower T-shaped hardware is joined to 2 to 4 side surfaces of a steel pipe column. A representative explanation will be given with the joint of the hardware.
FIG. 1 (a) is a horizontal sectional partial explanatory view showing a state in which the concrete-filled steel pipe column 1 and the T-shaped metal fitting 2 are joined by the rod-shaped fixing metal fitting 3, and FIG. 1 (b) is a diagram of Aa-Ab in FIG. It is arrow cross-section part explanatory drawing.
1 (a) and 1 (b), the steel pipe column 1 is a hole having a hole diameter of about 1.5 times the shaft diameter of the rod-shaped fixing metal 3 because the T-shaped metal member 2 is brought into contact with and joined by the rod-shaped fixing metal 3. It has a plurality of 1o.
The T-shaped metal piece 2 abutted against the steel pipe column 1 is composed of a flange 2f and a web 2u. A hole 2o having the same diameter as the hole 1o, which is aligned with the hole 1o of the steel pipe column 1, is formed on the upper side of the flange 2f. And two rows on the lower side.

The rod-like fixing metal 3 used here relates to claim 4 and has an anchor portion 3a formed with a screw (spiral ridge) 3p, a shaft portion 3b not formed with a screw, and a screw 3s portion. The external fixing portion 3c can be formed by screwing and fastening the nut 4 to the screw 3s portion.
As shown in FIGS. 2A and 2B, a washer 5 having a concave curved surface seat 5u is inserted in the screw 3s portion of the rod-shaped fixing metal 3, and the concave curved surface seat 5u of the washer 5 is inserted. The nut 4 integrally formed with the convex curved surface 4k to be engaged is screwed together to form the external fixing portion 3c, and a fixing angle adjusting mechanism is formed by the concave curved surface seat 5u of the washer 5 and the convex curved surface 4k of the nut 4. .

In Embodiment 1, the anchor portion 3a side of the rod-shaped fixing metal 3 is inserted into the hole 2o from the outer surface side of the T-shaped metal member 2 and the hole 1o of the steel tube column 1, and the rod-shaped fixing metal from the opposite side surface of the steel tube column 1 is inserted. 3 is fixed to the concrete 6 that has been filled and solidified inside the steel pipe column 1 by adjusting the angle to a fixing angle α (here, inclined by about 5 degrees in the horizontal direction from the reference center line c). Yes.
With the anchor portion 3a of the rod-shaped fixing metal 3 fixed to the concrete 6, the external fixing portion 3c is fixed to the outside of the steel member 2 via the washer 5 by fastening the screw 3s and the nut 4. Thus, a joint structure between the concrete-filled steel pipe column 1 and the steel member 2 is obtained. At this time, the bar-shaped fixing metal 3 is fixed in a state where it is tilted by about 5 degrees in the horizontal direction, but is stably fastened by the concave curved surface seat 5 u of the washer 5 and the convex curved surface 4 k of the nut 4.
In the joint structure of the first embodiment, each rod-like fixing metal 3 inserted from the two opposite side surfaces of the steel pipe column 1 has a length La of about 2/3 of the distance L between the opposing surfaces in the steel pipe column 1 here. However, it is possible to avoid the interference of the anchor portions 3a of the rod-shaped fixing hardware 3 facing each other by adjusting the fixing angle α. The anchor portions 3a are fixed to the concrete 6 to fix the fixing force. Can be secured sufficiently.

Here, as shown in FIG. 3A, the anchor portion 3a of the opposing bar-shaped fixing metal 3 is provided with irregularities by screws 3p in order to obtain an anchor effect with the concrete 6, In order to allow the anchor portion 3a to be inserted into the holes 2o and 1o from the outside of the steel member 2 and the steel pipe column 1, irregularities having outer diameters smaller than those of the holes 2o and 1o are provided. It can be considered that the screw 3p is made to be the same as the screw 3s of the upper fixing unit 3c and is continuous.
As another unevenness | corrugation, what combined the node and vertical ribs, such as many nodes 3f as shown in FIG.3 (b), or a general deformed reinforcing bar, etc. may be sufficient.
The lengths of the anchor portions 3a of the opposing bar-shaped fixing hardware 3 are all the same, and the angle adjustment for avoiding interference is performed in the horizontal and horizontal directions from the reference center line c. The lengths of the portions 3a do not have to be the same, and the fixing angle adjustment for avoiding the interference of the anchor portions 3a can also be performed in three dimensions, such as up and down directions or diagonal directions.

Further, the rod-shaped fixing angle adjusting mechanism of the external fixing portion of the fixing fittings 3, a screw 3s forming part of the rod-like fixing hardware 3,3 _1, concave in contact with the outer surface of the nut 4 and the T-fittings 2 with a convex surface 4k Although formed by washer 5 having a curved surface seat 5u, for example, FIG. 4 (a) (b), as shown in (c), the nut 4, a washer _{5 1} having a convex surface 5k, T-type fittings 2 You may form with the washer 5 which has the concave-curved seat 5u contact | abutted to the outer surface. 5A, 5B, and 5C, the washer 5 having the nut 4, the washer 5 having the concave curved surface 5u, and the convex curved washer 5k that is in contact with the outer surface of the T-shaped metal piece 2. May be formed.

[Embodiment 2]
Embodiment 2 of the joint structure of a concrete-filled steel pipe column and a steel member according to claim 2 will be described with reference to FIGS. The embodiment 2 is the embodiment 1, but using a rod-like fixing fittings 3 ₁ provided with oval flange 7 to the anchor portion 3a in place of the rod-like fixing hardware 3, oblong flange 7 Effect The anchoring force of the anchor portion 3a to the concrete is remarkably enhanced as compared with the case of the first embodiment. In the following, detailed description of parts common to the first embodiment will be omitted.
FIG. 6A is a horizontal cross-sectional partial explanatory view showing a state in which the concrete-filled steel pipe column 1 and the T-shaped metal fitting 2 are joined, and FIG. 6B is a cross-sectional partial cross-sectional view taken along the line Ba-Bb in FIG. FIG.
Moreover, FIG. 7 is front explanatory drawing which shows the example of the long hole of a steel pipe column. FIG. 9 shows an example of the structure of an oval ridge, and FIG. 9 (a) shows a side sectional view and a front explanatory view on the short diameter side of the oval ridge. (B) shows the sectional side view and front explanatory drawing by the side of the long diameter of an oval ridge.

6, the rod-like fixing fittings 3 _1, those relating to claim 5, FIG. 8 (a), the (b), the the length of the anchor portion 3a formed with screw 3p, diameter d _y / Outside by a nut 4 having an oval (substantially elliptical shape) flange 7 having a minor axis d _x of about 2.0 and having a convex curved surface seat 4k on the outside and a washer 5 having a concave curved surface seat 5u. The fixing unit 3c is formed.
As shown in FIG. 9, the oval ridge 7 is a cap-shaped member having a screw 7s that is screwed into the screw 3p of the anchor portion 3a and having a closed end on one side. Here, the major axis d _y oval flange 7 is in the 2.5 times the shaft diameter rod-like fixing fittings 3 _1. An anchor fixing portion 3 a in which the oval ridge 7 is formed is fixed to the concrete 6 filled and solidified in the steel pipe column 1. In this state, the rod-like fixing fittings 3 ₁ is an angle adjusted to the fixing angle α which interference does not occur between each anchor portion 3a (where the up-down direction in 5 degrees inclined from the reference center c is).
In the embodiment 2, the rod-like fixing fittings 3 ₁ anchor portion 3a formed oblong flange 7, for insertion from the outside side in the hole of the tubular columns 1, hole 1x of the tubular columns 1, FIG. as shown in 7, as oval flange 7 can be inserted, it has become a long hole oval (here oval) with a diameter D _y and minor axis D _x length direction of the steel column 1 as each rod-like fixing fittings 3 ₁ anchor portion 3a can be smoothly inserted, it is made larger in the normal level than the major diameter d _y, minor d _x oval flange 7.

Rod-like fixing fittings 3 _1, here, as in Embodiment Example 1, the threaded shaft portion 3b is not formed (the spiral ridge) anchor portion 3a and the screw forming a 3p, external fixing and fastening nuts 4 It consists of a screw 3s part forming the part 3c. Here, an oval collar 7 is screwed onto and tightened to the screw 3p of the anchor part 3a.
In the embodiment 2, holes 2o of the T-fittings 2 to abut and joined to the tubular columns 1, wherein has a slightly larger circular hole than the shank diameter of the rod-like fixing fittings 3 ₁ has a length from its exterior side can not insert an anchor portion 3a having a circular flange 7, after inserting the rod-like fixing fittings 3 ₁ anchor portion 3a in the long hole 1x of tubular columns 1, the rod-like fixing fittings 3 ₁ of the external fixing unit a T-fittings 2 It can be inserted into the hole 2o and protruded to the outside, and the nut 4 can be screwed to the external fixing portion on the outside to be fastened.

Anchor portion 3a of the rod-like fixing fittings 3 _1, here with those formed by providing a screw 3p as shown in FIG. 3 (a), screwed an oval flange 7 to the screw 3p anchor portion 3a In the case of using one formed by providing a large number of joints 3f as shown in FIG. 3 (b) or a combination of joints such as deformed reinforcing bars and vertical ribs. Considering the use of a fixing method such as welding or adhesion for the formation of the oval ridge 7 on the anchor portion 3a. When such a fixing method is used, the screws 7 s may be omitted from the oval ridge 7.
In Embodiment 2, because it has a flange 7 of the oval to the anchor portion 3a of the rod-like fixing fittings 3 _1, since the fixing force between the concrete 6 of the anchor portion 3a than in the embodiment 1 can be enhanced remarkably, performed The anchor portion 3a has a shorter length La than that of the first embodiment, and a sufficient fixing force with the concrete 6 can be secured.

In Embodiment 2, _one oval ridge 7 of the anchor portion 3a of the rod-shaped fixing metal 31 is formed at the tip, but as shown in FIGS. 10 (a), (b), and (c), It is also easy to form the shape of the two oval ridges 7 in a cross shape as viewed from the shaft end by shifting the orientation of the oval ridges 7 by 90 degrees, for example. In this case, by two oblong flange 7,7 ₁ of formation interval e than the thickness of the steel pipe column 1, first the distal end side first oblong elongated hole of the flange 7 steel column 1 of insert in accordance with the 1x, 2 nd oval collar ₇₁ of the rod-like fixing fittings 3 ₁ can rotate 90 degrees to insert in accordance with the long hole 1x of tubular columns 1.
In this manner, even when a plurality of oblong flange 7,7 ₁ of different orientations, can be inserted from the outer side into the long hole 1x of the steel tube column 1.
If the rod-like fixing fittings 3 ₁ anchor portion 3a for use to form an oval flange 7,7 _1, the oblong flange 7,7 ₁ forming conditions may not be the same. For example, consider the use of the rod-like fixing fittings 3 ₁ formed at intervals e oval flange 7,7 ₁ in the same in direction to the anchor portion 3a.
Also, these rod-like fixing fittings 3 _1, other rod-like fixing hardware, for example, rod-like fixing hardware 3 and general bolt Embodiment 1 (hole in the case of these steel column general circular hole) such as It is also possible to consider a joint structure that is used in combination.

[Embodiment 3]
Embodiment 3 of a joint structure of a concrete-filled steel pipe column and a steel member according to claim 3 will be described with reference to FIGS.
In this third embodiment, like the first and second embodiments, the concrete-filled steel pipe column 1 and the T-shaped hardware 2 are to be joined, and one or more anchor parts of one or more rod-shaped fixing hardware are attached. Although the anchor function is strengthened by forming an oval ridge and the fixing force with the concrete filled and solidified in the steel pipe column is strengthened, the length of the anchor portion is the same as in the second embodiment. Embodiment 2 in that the rod-shaped fixing hardware according to claim 6 is not required to be 1/2 or more of the distance between the opposing sides of the lens and to have an angle adjusting mechanism for avoiding interference of the anchor portion. Are different. A detailed description of portions common to the second embodiment is omitted.

FIG. 11 (a) is a horizontal sectional partial explanatory view of the main part showing a state where the joining of the steel pipe column 1 and the T-shaped metal fitting 2 is completed, and FIG. 11 (b) is a sectional view taken along the line Ca-Cb in FIG. It is explanatory drawing.
11, the rod-like fixing fittings _{3 2,} those relating to claim 6, as shown in FIG. 12 (a), (b) , the screw 3p portion formed at the tip of the anchor portion 3a, the major diameter _{d y} / An oblong ridge 7 having a minor axis d _x of about 1.5 is formed, and a screw 3s portion for forming an external fixing portion 3c is formed by fastening a nut 4 to an outer end portion. Here, major diameter d _y oval flange 7 are 2.0 times the rod-like fixing fittings 3 ₂ shaft diameter.
The anchor portion 3a in which the oval ridge 7 is formed is fixed to the concrete 6 filled and solidified in the steel pipe column 1 in a region whose length is slightly shorter than ½ of the distance between the opposing sides of the steel pipe column.
In the embodiment 3, similarly to embodiment 2, the steel pipe column 1 as shown in FIG. 7, as oval flange 7 of the rod-like fixing fittings 3 ₂ anchor portion 3a can be inserted, lengthwise are provided oval elongated hole 1x with minor axis D _x has a diameter D _y to. Long diameter D _y of the long holes _1x, largely normal level than the minor diameter D _x long diameter d _y, minor d _x oval flange 7 to the anchor portion 3a of the rod-like fixing fittings 3 ₂ can be smoothly inserted is doing.

Further, holes 2o of the T-fittings 2 to abut and joined to the tubular columns 1, wherein because of the slightly larger circular hole than the shank diameter of the rod-like fixing fittings 3 _2, flange from its outer side an oblong 7 Cannot be inserted. Projecting this case, the anchor portion 3a of the rod-like fixing fittings 3 _2, by inserting the screw 3s portion to be external fixing portion 3c after insertion into the long hole 1x of the steel tube column 1 in the hole 2o T-type fittings 2 to the outer side are allowed, keep provisionally fastened screwed nut 4 interposed washers 5 _2. Or, to project toward the outside by inserting a screw 3s portion to be external fixing portion 3c before inserted into the long hole 1x of the steel tube column 1 in the hole 2o T-type fittings 2, screw nut 4 interposed washer 5 ₂ The anchor portion 3a can be inserted into the long hole 1x of the steel pipe column 1 after the temporary fastening.

Rod-like fixing fittings 3 ₂ anchor portion 3a in this embodiment 3, but in which one oval collar 7 into the screw 3p portion provided screw 3p at the tip was screwed fastened (fixed) as shown in FIG. 13 (a), (b) , 2 two cross when viewed from the oval flange 7 and 7 ₁ of the orientation intervals e of more than the thickness of the steel column 1 90 degrees staggered shaft end It can also be formed in a shape. In this case, it is possible to further enhance the two oblong flange 7 7 ₁ an anchor effect by.
In the case of FIG. 13, oval flange 7 and _71, although formed at a position relation of a cross shape as viewed from the shaft end side, is not an essential condition be formed in a positional relationship to be cross-shaped . When forming a plurality of oblong flange as oval flange 7 and 7 _1, consider also the same orientation.

Further, the screw as the rod-like fixing hardware with other anchor portion 3a, for example, as shown in FIG. 14 (a), (b) , the shank end to form an oval flange 7 ₂ integrally on the outer side using a rod fixing fittings 3 ₃ with 3s, it can function as an anchor to position the oval flange 7 ₂ to the anchor portion 3a tip.
As shown in FIG. 14, when caused to function as an anchor the oval flange 7 ₂ anchor portion 3a tip, for example, FIG. 15 (a), the (b), the outer side of the screw 3s anchor portion 3a a rod-like fixing hardware 3 ₄ extended, FIG. 16 (a), the not having oblong flange 7 ₃ closed end as shown in (b) threadedly engaged with the fastening, the oval flange 7 ₂ 7 _{With 3} , the anchor function can be further strengthened.
If you such anchor portion 3a, there is an advantage that an oval collar 7 ₂ easily fastened in any position of the anchor portion 3a (fixed) it is possible to be arbitrarily adjusted anchor effect of the anchor portion 3a .
In the case of FIG. 15, oval flange 7 ₂ and 7 _3, fastened in a position relation of a cross shape as viewed from the leading end side of the anchor portion 3a is (fixed), but concluded positional relation of the cross-shaped To do is not a requirement. Consider be the same oblong direction of the flange 7 ₂ and 7 _3.

[Embodiment 4]
Another embodiment 4 of the joint structure of a concrete-filled steel pipe column and a steel member according to claim 3 will be described with reference to FIG.
FIG. 17A is a horizontal cross-sectional explanatory view of the main part showing a state in which the joining of the steel pipe column 1 and the T-shaped hardware 2 has been completed. (B) drawing is a front view showing a distal end surface side of (a) view of the rod-like fixing fittings 3 ₃ of the anchor portion 3a. (C) drawing is a front view showing an end face side of the oval inner nut 8 which is fixed on the steel tube column 1 the inner surface is inserted into a rod fixing fittings 3 _3.
The embodiment 4, FIG. 14, similar to FIG. 15, the oval flange 7 ₂ formed integrally with the shaft portion to the distal end of the anchor portion 3a, and extending the outer side screw 3s to the base of the anchor portion 3a, the is intended to use a rod-like fixing fittings 3 ₃ capable fastening oblong inner nut 8 to the base, the concrete 6 by inserting the anchor portion 3a from the outer side into the long hole 1x of tubular columns 1 filled, when solidified, The steel pipe column 1 and the T-shaped metal fitting 2 can be fixed between the oval inner nut 8 and the outer nut 4 to enable stable concrete filling construction.

In this case, since the fastening (fixed) at a position where a predetermined position of the inner side of the steel pipe 1 is screwed inside nut 8 on the screw 3s oblong external end of the rod-like fixing fittings 3 _3, the screw 3s The end on the outside is inserted into the hole 2o of the T-shaped metal piece 2 so as to protrude to the outside of the T-shaped metal object _2, and the nut 4 is screwed into the screw 3s and the nut 4 is screwed and temporarily tightened.
Then, the long hole 1x of the steel tube column 1, and insert the inner nut 8 oval flange 7 ₂ and oval anchor portion 3a, 90 ° rotated with oblong elongated hole steel column 1 inside the nut 8 The steel pipe column 1 and the T-shaped metal piece 2 can be fastened between the oval inner nut 8 and the outer nut 4 in a state where it can be locked to 1x.

Since the oval inner nut 8 used in the fourth embodiment only needs to fulfill the nut function until the steel pipe column 1 is filled with the concrete 6 and solidified, the oval trough of the anchor portion 3a for strengthening the anchor function is required. since it does not require the strength such as 7 _2, the concrete filling, does not adversely affect solidified strength of steel column 1.
Incidentally, by forming an oval inner nut 8 to the anchor portion 3a of the rod-like fixing fittings 3 _3, 13, to the junction of claim 3 using a bar-shaped fixing fittings 3 ₂ as shown in FIG. 14 applies is possible, also be applied in the joint according to claim 1 for use rod-like fixing hardware 3,3 _1.

  The present invention is not limited to the contents of the above embodiment. For example, concrete-filled steel pipe columns and steel member conditions to be joined in the present invention, rod-shaped fixing hardware conditions (including the number), nut conditions, hole conditions, washer conditions, anchor formation conditions, etc. There is a change within a range satisfying the above-mentioned claims according to the type, application, joining portion, required strength (consideration of load direction) and the like.

The horizontal cross-section conceptual explanatory drawing which shows the joining structure of the concrete filling steel pipe column and structural member (T-type metal fitting) in Embodiment 1 of this invention. (B) The figure is an Aa-Ab arrow cross-sectional conceptual explanatory drawing of Fig.1 (a). (A) The figure is an expanded sectional explanatory drawing of the adjustment mechanism of the insertion angle of the rod-shaped fixing metal in FIG. 1 (a). (B) The figure is a nut side plane | planar conceptual explanatory drawing of the washer inserted between a nut seat surface and a T-shaped metal fitting. (A) The figure is a side concept explanatory drawing which shows the example of the screw part which forms the anchor part of the rod-shaped fixing metal used in Embodiment 1 of this invention. (B) The side conceptual explanatory drawing which shows the example of a node part which forms the other anchor part of a high strength volt | bolt. (A) The figure is an expanded sectional explanatory drawing of the adjustment mechanism of the insertion angle of the other rod-shaped fixing metal fitting used in Example 1 of an embodiment. (B) The figure is a plane explanatory drawing by the side of the convex curve seat of the washer which has the convex curve seat which contacts the nut seat which forms the adjustment mechanism of the insertion angle of (a) figure. (C) The figure is a plane conceptual explanatory drawing by the side of the concave curved seat of the washer having the concave curved seat corresponding to the convex curved seat of the washer having the convex curved seat. (A) The figure is an expanded sectional explanatory drawing of the adjustment mechanism of the insertion angle of another rod-shaped fixing metal. (B) The figure is a plane explanatory view on the concave curved surface seat side of the washer having the concave curved surface seat that abuts the nut seat surface forming the insertion angle adjusting mechanism of FIG. (C) The figure is a plane conceptual explanatory drawing by the side of the convex curve seat of the washer having the convex curve seat corresponding to the concave curve seat of the washer having the concave curve seat. The horizontal cross-section conceptual explanatory drawing which shows the joining structure of the concrete filling steel pipe column and structural member (T-type metal fitting) of Embodiment 2 of this invention. (B) The figure is a cross-sectional conceptual explanatory view taken along the line Ba-Bb of FIG. Front explanatory drawing which shows the hole shape example and arrangement | positioning example of the steel pipe pillar in Embodiment 2. FIG. (A) The figure is a partial cross section side explanatory view of the rod-shaped fixing metal used in the second embodiment. (B) The figure is front explanatory drawing of the oval collar end surface of the rod-shaped fixing metal fitting of (a) figure. (A) The figure is a cross-sectional view on the short diameter side and a front explanatory view of an oval ridge used in another example of the anchor portion of the rod-shaped fixing metal used in the second embodiment. (B) The figure is a cross section on the long diameter side of another oval ridge and a front explanatory view. (A) The figure is side surface explanatory drawing which shows the other example of the anchor part of the other rod-shaped fixing metal fitting used in Example 2 of an embodiment, and the other example of the oval scissors used. (B) The figure is front explanatory drawing of the oval collar end surface of (a) figure. (C) The figure is a three-dimensional explanatory diagram of an oval ridge shown in (a) and (b). The horizontal cross-section conceptual explanatory drawing which shows the joining structure of the concrete filling steel pipe column and structural member (T-shaped metal fitting) of Embodiment 3 of this invention. (B) The figure is a Ca-Cb arrow cross-sectional conceptual explanatory drawing of Fig.1 (a). (A) The figure is side surface explanatory drawing of the rod-shaped fixing metal fitting used in Example 3 of the embodiment. (B) The figure is front explanatory drawing of the oval collar end surface of (a) figure. (A) The figure is side surface explanatory drawing which shows the example of an anchor part of the other rod-shaped fixing metal fitting used in Example 3 of an embodiment. (B) The figure is front explanatory drawing of the oval collar end surface of (a) figure. (A) The figure is side surface explanatory drawing which shows the example of an anchor part of the other rod-shaped fixing metal fitting used in Example 3 of an embodiment. (B) The figure is front explanatory drawing of the oval collar end surface of (a) figure. (A) The figure is side surface explanatory drawing which shows the example of an anchor part of the other rod-shaped fixing metal fitting used in Example 3 of an embodiment. (B) The figure is front explanatory drawing of the oval collar end surface of (a) figure. The cross section and front explanatory drawing of the major axis side of the ellipse of one side used in FIG. (A) The figure is a partial cross-sectional conceptual explanatory diagram showing the main part of the joint structure of the concrete-filled steel pipe column and the structural member (T-shaped hardware) in the fourth embodiment. (B) The figure is front explanatory drawing of the oval ridge of the rod-shaped fixing metal fitting of (a) figure. (C) The figure is front explanatory drawing of the oval internal nut with respect to the rod-shaped fixing metal fitting of (a) figure.

Explanation of symbols

1 Steel tube pillar 1o Hole 1x Long hole 2 T-shaped hardware (steel member)
2f Flange 2u Web 2o Hole 3, 3 ₁ , 3 ₂ , 3 ₃ , 3 ₄ , 3 ₅ Bar-shaped fixing metal 3a Anchor part 3b Shaft part 3c External fixing part 3f Node 3p 3s Screw 3h Head 4 Nut 4k Convex curved surface seat 5 Washers (concave curved seat) 5 ₁ Washers (convex curved seat)
5 ₂ Washer (Flat Seat) 5o Hole 5k Convex Curved Seat 5u Concave Curved Seat 6 Concrete 7, 7 ₁ , 7 ₂ , 7 ₃ Oval Round 7s Screw 8 Oval Internal Nut 8s Screw

Claims (6)

  A concrete-filled steel pipe column and steel made by joining steel members to multiple sides of the same level of the steel pipe column using a rod-shaped fixing hardware having an anchor part and an external fixing part and having a fixing angle adjustment mechanism on the external fixing part side The structure is a joining structure of members, and the length of the anchor portion of one or more fixing metal pieces is set to a length of 1/2 or more of the distance between the opposing surfaces in the steel pipe column, and this rod-shaped fixing metal piece is used as a hole in the steel pipe column. Inserted from the outside, fixing the anchor angle of each bar-shaped fixing hardware to the concrete filled and solidified in the steel pipe column in a state where interference between the anchor portions of each bar-shaped fixing hardware in the steel pipe column is avoided by adjusting the fixing angle A concrete-filled steel pipe column and steel member joining structure characterized in that an external fixing part of each rod-like fixing metal is fixed on the outer surface side of a steel member in contact with the steel pipe column.   One to a plurality of oval ridges are formed in the anchor portion of the rod-shaped fixing metal, and the steel pipe column is provided with a long hole having a long diameter in the vertical direction through which the oval ridge can be inserted, and the oval ridge is formed. 2. The concrete-filled steel pipe column and steel according to claim 1, wherein the anchor portion of the formed bar-shaped fixing metal is inserted into a long hole of the steel pipe column and fixed to the concrete filled and solidified in the steel pipe column. Bonding structure of manufactured parts.   A concrete-filled steel pipe column and steel member joining structure that joins a steel member to a steel pipe column using a rod-like fixing hardware having an anchor part and an external fixing part. 1 to a plurality of oval ridges are formed, and the steel pipe column is provided with a long hole having a long diameter in the vertical direction through which the oval ridge can be inserted, and the rod-shaped fixing hardware is formed from the outside to the long hole of the steel pipe column. Inserting and fixing the anchor part formed of the above-mentioned oval scissors to the concrete filled and solidified in the steel pipe column, fixing the external fixing part of the rod-like fixing hardware on the outer surface side of the steel member A joint structure of a concrete-filled steel pipe column and a steel member.   A fixing length used in a joint structure of a concrete-filled steel pipe column and a steel member according to claim 1 or 2, wherein the fixing length is fixed to the concrete in the steel pipe column by being inserted into a hole of the steel pipe column from the outside. Having an anchor portion that is at least half the distance between the opposing surfaces in the steel pipe column, and an external fixing portion that fixes on the outer surface side of the steel member in contact with the steel pipe column. A bar-shaped fixing hardware for a joint structure of a concrete-filled steel pipe column and a steel member, characterized in that a fixing angle adjusting mechanism is formed on the steel member.   A fixing length used in the joint structure of a concrete-filled steel pipe column and a steel member according to claim 2, wherein the fixing length is fixed to the concrete in the steel pipe column by being inserted into the long hole of the steel pipe column from the outside. Is inserted through the hole of the steel member that is in contact with the steel pipe column and the anchor part having a length of 1/2 or more of the distance between the opposed surfaces in the steel pipe column and forming a plurality of oval ridges A rod-shaped fixing hardware for a joint structure of a concrete-filled steel pipe column and a steel member, which has an external fixing portion for fixing on the outer surface side, and a fixing angle adjusting mechanism is formed in the external fixing portion.   A rod-like fixing hardware used in a joint structure between a concrete-filled steel pipe column and a steel member according to claim 3, wherein the fixing metal is inserted into a long hole of the steel pipe column from the outside and fixed to the concrete in the steel pipe column. A concrete-filled steel pipe column and a steel member having an anchor part formed with an oval ridge and an external fixing part that is inserted into a hole of a steel member that is in contact with the steel pipe column and fixed on the outer surface side thereof Bar-shaped fixing hardware for joint structures.

Images