JP6515361B2 - Reinforcement member and beam connection structure - Google Patents

Description

The present invention relates to a reinforcing member and a beam joint structure.
Priority is claimed on Japanese Patent Application No. 2017-047881, filed Mar. 13, 2017, the content of which is incorporated herein by reference.

Conventionally, the joint between the beam and the girder in a beam joint structure in which the end of the girder (beam) is joined to the girder (support member) is generally designed as a rigid joint or a pin joint. In addition, the definition of rigid connection and pin connection shall conform to the European design standard (Eurocode 3-Part 1-8).
In a rigid joint, for example, the beamlet flange is welded or welded to the large beam (hereinafter referred to as bolt connection) and the beamlet web is bolted to a shear plate provided on the large beam. Ru. On the other hand, at a joint of a pin joint, for example, a web of a beam is bolted to a shear plate provided on a large beam, but a flange of the beam is not connected to the large beam.

For example, as a rigid connection, in Patent Document 1 below, an end of a beam is installed in a recess provided in a concrete wall, a beam is bolted to the concrete wall via a substrate, and a recess is closed by a filling member The structure is disclosed. In this beam joint structure, since the recess formed in the concrete wall is closed by the filling member, there is a problem that the number of steps required for beam joint increases.
On the other hand, in order to reduce such man-hours, according to Non-Patent Document 1 below, the lower flange of the beam, which is an H-shaped steel, is used as a beam joining structure under load conditions where horizontal force is not applied to the support member and beam A beam connection structure is disclosed in which a contact plate is installed in a gap between the support member and the compressive stress along the horizontal direction is transmitted from the beam to the support member through the contact plate.

  Further, Patent Document 2 below discloses a connection structure of steel-framed beams, which can make steel-framed beams which are adjacent to each other across the steel-framed beams with a simple structure and inexpensively as a continuous beam. In this connection structure, the lower flanges of the steel beam girder adjacent to each other across the steel girder are joined by metal touch via the web of the girder girder, the flange connection member in contact with this and the pair of compression members sandwiching these. Be done.

Japanese Patent Application Laid-Open No. 8-42027 Japanese Patent Laid-Open Publication No. 2005-282019

"Eurocode 4: Design of composite steel and concrete structures-Part 1-1: General rules and rules for buildings" EUROPEAN COMMITTEE FOR STANDARDIZATION, December 2004, p. 90

However, if the construction accuracy of the support member and the beam is not ensured, the size of the gap between the support member and the beam may vary depending on the location. Therefore, in the beam joint structure described in Non-Patent Document 1, there is a problem that it is difficult to appropriately prepare a contact plate of an appropriate size in accordance with the size of the gap.
In addition, when using a compression material as disclosed in Patent Document 2, an appropriate bonding state can not be maintained because the compression material moves upward due to the influence of vibration or temperature change at the time of construction or when an earthquake occurs. There was also a fear.

  The present invention has been made in view of such problems, and regardless of the size of the gap between the support member and the beam, the support member and the beam are reliably joined to maintain the joined state. It is an object of the present invention to provide a reinforcement member and a beam joint structure that can be made.

The outline of the present invention is as follows.
(1) A first aspect of the present invention is a beam joint structure, which includes a support member , a beam whose one end side in the material axial direction is attached to the support member and supported by the support member, and the support member A reinforcing member whose tip is disposed in a gap formed between the beam and the beam, the reinforcing member is disposed in the gap formed between the support member and the beam, and the reinforcing member is A first contact surface contacting the support member and a second contact surface contacting the end face of the beam facing the support member, and the first contact surface and the second contact are directed toward the tip. The movement of the main body portion is achieved by locking the main body portion formed such that the distance between the surface and the beam in the material axis direction is small, and at least one of the support member and the beam. A retaining mechanism for restraining, the retaining mechanism comprising: The plurality of projections formed on at least one of the touch surface and the second contact surface are provided, and the plurality of projections are adjacent to each other in a state in which the front end of the reinforcing member is disposed in the gap. An inclination angle φ (rad) formed by a plane including ridges of the projections and a plane perpendicular to the material axial direction of the beam is formed to satisfy the following equation (1) or (2).
^{φ ≦ wl 3 / 24EI ··· (} 1)
E: Young's modulus of the beam (N / mm ² )
I: second moment of area of the beam (mm ⁴ ),
w: Equal distribution load (kN / m) by fixed load supported by the beam
l: Length of the beam (mm)
φ ≧ Δgb / (h−t _f ) (2)
Δgb: assumed value of the error of the gap in the material axis direction of the beam (mm)
h: height of the reinforcing member in the vertical direction (mm)
t _f : thickness in the vertical direction of the lower flange of the beam
(2) In the beam joint structure according to (1), the support member is a large beam supported by a column, and the beam is a beam supported by the support member, and the support member and the support member The beams may be H-shaped steels and may have the same cross-sectional height.
(3) In the beam joining structure according to (1) or (2) above, the beam joining structure includes a joining member for semi-rigid joining or pin joining the support member and the beam, and the reinforcing member The compressive stress that is generated towards is transmitted to the support member.
(4) In the beam joining structure according to any one of (1) to (3), the first contact surface extends in a direction perpendicular to the material axial direction of the beam, and the second contact surface is The plurality of protrusions may extend in a direction intersecting with the first contact surface, and may project from the second contact surface.

  According to the above reinforcing member and the beam joint structure, regardless of the size of the gap between the support member and the beam, the support member and the beam can be reliably joined and the joined state can be maintained.

It is a front schematic diagram of the building where the reinforcement member concerning a first embodiment of the present invention is applied. It is a cross-sectional schematic diagram of the building shown in FIG. It is a perspective view of the B section shown in FIG. It is a front view of beam joint structure containing a reinforcement member concerning a first embodiment of the present invention. It is a perspective view which shows a part of beam joint structure shown in FIG. It is a perspective view from the downward direction of the beam joint structure shown in FIG. It is a perspective view of the reinforcement member which concerns on 2nd embodiment of this invention. It is a front view which shows the state by which the reinforcement member shown to FIG. 7A was arrange | positioned at clearance gap. It is a perspective view of the reinforcement member which concerns on a 1st modification. It is a front view which shows the state by which the reinforcement member shown to FIG. 8A was arrange | positioned at clearance gap. It is a perspective view of the reinforcement member concerning a 2nd modification. It is a front view which shows the state by which the reinforcement member shown to FIG. 9A was arrange | positioned at clearance gap. It is the schematic for demonstrating inclination-angle (phi) of the reinforcement member which concerns on a 2nd modification. It is a perspective view which shows the beam bonded structure which concerns on 3rd embodiment of this invention. It is a supplementary view for demonstrating the dimension of a reinforcement member. It is a supplementary drawing for demonstrating the structure in case the height of the cross section of a girder is larger than the height of the cross section of a cross beam.

First Embodiment
The reinforcement member 51 which concerns on 1st embodiment of this invention is applied to the building 1 which has the beam joint structure 2 as shown to FIG. 1, FIG. In addition, while showing only the frame type structure of the building 1 in FIG.1 and FIG.2, it hatches and attaches to the core wall 10 mentioned later.

The building 1 includes a core wall 10, a pillar 11, a large beam (supporting member) 21, a beam 31 and a floor slab 41.
The core wall 10 is disposed, for example, at a central portion of the building 1 in a plan view, and extends along the vertical direction. For example, in the core wall 10, an elevator, stairs and the like (not shown) are disposed. The pillars 11 are arranged to surround the core wall 10 and extend in the vertical direction. The large beam (support member) 21 extends from the column 11 along the horizontal plane. A beam 31 extends from the girder 21 along a horizontal plane. Here, FIG. 3 is a perspective view of a portion B shown by a two-dot chain line in FIG. As shown in FIG. 3, the floor slab 41 is joined above the large beam 21 and the small beam 31. The large beam 21 and the small beam 31 may be inclined with respect to the horizontal plane.
The building 1 is, for example, a high-rise building having a plurality of levels, and the core wall 10 is formed in a rectangular tube shape whose one side is a rectangle of several tens of meters in a plan view. The core wall 10 is an RC (Reinforced Concrete: reinforced concrete) structure constructed by arranging reinforcing bars in concrete.

  As shown in FIG. 3, one end of the first shear plate 14 is fixed to the core wall 10. Then, the end of the large beam 21 is joined to the other end of the first shear plate 14 by a bolt, welding or the like. Thereby, the first shear plate 14 semi-rigidly joins the girder 21 to the core wall 10.

  Here, the semi-rigid connection is a connection type in which the bending moment transmitted between the core wall 10 (support member) and the large beam 21 (beam) is small, and the rotational movement of the large beam 21 with respect to the core wall 10 is restricted to some extent. Say Further, the pin connection means a connection type in which no rotational moment of the large beam 21 with respect to the core wall 10 is restricted with no or minimal bending moment transmitted between the core wall 10 and the large beam 21. And, the definition of semi-rigid connection, pin connection, and rigid connection shall conform to the European design standard (Eurocode 3-Part 1-8). In addition, it can be said that rigid joints have infinite rotational stiffness, pin joints have zero rotational stiffness, and semi-rigid joints have limited rotational stiffness.

In the following, among the configurations of the building 1, attention will be focused on the large beam 21, the small beam 31 attached to the large beam 21 at one end side in the material axial direction, and the floor slab 41 joined to the small beam 31.
The beam joint structure 2 is configured to include a large beam 21, a small beam 31, and a floor slab 41. As shown in FIG. 4, the floor slab 41 is manufactured by placing concrete on a deck plate 42 disposed on the large beam 21 and the small beam 31.

For example, an H-shaped steel is used for the large beam 21. An upper flange 23 is formed above the web 22 in the large beam 21. Below the web 22, a lower flange 24 is formed.
The plurality of large beams 21 extend in directions orthogonal to one another along the horizontal surface. Hereinafter, the material axial direction of the large beam 21 and the direction along it will be referred to as a first direction X, and the substantially horizontal direction orthogonal to the material axial direction of the large beam 21 and the direction along it will be referred to as a second direction Y. Further, a direction perpendicular to the first direction X and the second direction Y and a direction (vertical direction) along the direction are referred to as a third direction Z. In addition, below, the girder 21 extended from the core wall 10 is mainly demonstrated.

  As shown in FIG. 4, the second shear plate 25 (joining member) is fixed to the large beam 21 by welding or the like. In the illustrated example, the second shear plate 25 protrudes from the large beam 21 in the second direction Y. In the second shear plate 25, a plurality of through holes 25a are formed in a line along the vertical direction. Each through hole 25 a penetrates the second shear plate 25 in the first direction X.

For the beam 31, for example, an H-shaped steel is used. An upper flange 33 is formed above the web 32 in the beam 31. Below the web 32, a lower flange 34 is formed.
The beam 31 is disposed so as to extend along the second direction Y in a natural state in which a bending moment due to external force or gravity does not act on the beam 31. When a bending moment due to an external force or gravity acts on the beam 31, the beam 31 is curved downward along the reference plane S including the second direction Y and the third direction Z.

  As shown in FIG. 4, at each end of the web 32 of the beam 31, a plurality of bolt holes 36 are arranged in the vertical direction. The bolt holes 36 are formed at positions corresponding to the through holes 25 a of the second shear plate 25. Then, by arranging bolts or the like (not shown) in the bolt holes 36 and the through holes 25 a, the second shear plate 25 can generate shear force and bending moment generated from the small beam 31 toward the large beam 21. , Can be transmitted to the girder 21. Thus, the second shear plate 25 semi-rigidly joins the beam 31 to the beam 21.

  In the beam joint structure 2, the cross-sectional heights (beams) of the large beam 21 and the small beam 31 are equal to each other. Here, the cross-sectional height indicates the dimension in the vertical direction between the upper side surface of the upper flange of the H-shaped steel and the lower side surface of the lower flange. Further, since the deck plate 42 is laid on the upper side of the large beam 21 and the small beam 31, the vertical positions of the upper flanges 23 of the large beam 21 and the upper flanges 33 of the upper beam 33 of the small beam 31 are the same. Match.

The reinforcing member 51 (also referred to as a contact plate) according to the present embodiment is a gap between the large beam 21 and the small beam 31 supported by the large beam 21 in the beam joining structure 2 as shown in FIGS. It is provided in a state in which the tip is pinched to K.
The reinforcing member 51 is disposed at a portion of the gap K below the neutral axis C1 of the cross section of the beam 31 and located between the lower flange 24 of the large beam 21 and the lower flange 34 of the beam 31. It is done. In the illustrated example, the reinforcing member 51 is sandwiched between the lower flange 24 of the girder 21 and the lower flange 34 of the girder 31 in a portion located on one side of the second shear plate 25 in the first direction X. It is done.
When the bending moment generated at the end of the small beam 31 is transmitted to the large beam 21 by the load acting on the small beam 31, the neutral axis C1 is between the small beam 31 and the large beam 21 in the second direction Y And the center line in the vertical direction of the beam 31 in a front view seen from the first direction X in the illustrated example.

  As shown in FIG. 4, the reinforcing member 51 has a main body 511 and a retaining mechanism (restriction member 54A and restriction member insertion hole 54B). The material of the reinforcing member 51 is not particularly limited, and a metal such as steel is exemplified.

The main body portion 511 has a first contact surface 511a in contact with the large beam 21 (support member) and a second contact surface 511b in contact with the end face of the small beam 31 (beam) opposite to the large beam 21.
Further, the main body portion 511 has a base end surface 511c and a tip end surface 511d that connect the ends in the third direction Z of the first contact surface 511a and the second contact surface 511b. In the state in which the reinforcing member 51 is installed in the gap K, the dimension in the second direction Y of the base end surface 511c is larger than the dimension in the second direction Y of the distal end surface 511d.
In the following description, with reference to the gap K in which the reinforcing member 51 is installed, the side on which the proximal end surface 511c is located is referred to as the proximal side, and the opposite side is referred to as the distal side.

In the main body portion 511, the separation distance in the second direction Y between the first contact surface 511a and the second contact surface 511b on the base end side is between the first contact surface 511a and the second contact surface 511b on the distal end side. Is formed to be larger than the separation distance in the second direction Y.
More specifically, the main body portion 511 has a tapered shape in which the separation distance in the second direction Y between the first contact surface 511a and the second contact surface 511b gradually decreases from the proximal end toward the distal end. Have. That is, the main body portion 511 is formed such that the separation distance in the second direction Y (width direction) gradually decreases as going from the base end surface 511c to the tip end side.

  Therefore, the main body portion 511 of the reinforcing member 51 is a wedge surface in which the second contact surface 511b is inclined with respect to the extending direction of the first contact surface 511a. In the main body portion 511, the first contact surface 511a extends in the vertical direction in the state of being disposed in the gap K of the main body portion 511.

Here, in a state where the reinforcing member 51 is disposed in the gap K, the inclination angle φ formed by the second contact surface 511b and a surface perpendicular to the second direction Y is preferably more than 0 (rad), More preferably, it is Δg _b / (h-t _f ) or more.
Here, Δg _b is an assumed value (mm) of an error of the length (gap dimension) of the gap K in the direction along the second direction Y caused by the construction error. Further, as shown in FIG. 11, h is the height (mm) in the direction along the third direction Z of the reinforcing member 51, and t _f is the dimension (plate thickness) in the Z direction of the lower flange 34 of the beam 31 It is. In FIG. 11, the lower flange of the beam is indicated by a two-dot chain line.
Δg _b is, for example, a construction error that may occur at the joint of the small beam 31 and the second shear plate 25, and the difference in diameter between the bolt hole 36 and the shaft portion (not shown) of the bolt or the through hole 25 a and the bolt Equal to the difference in diameter between the shaft and the shaft (not shown). Assuming that the gap dimension when the center of the bolt hole 36 in the second direction Y coincides with the center of the shaft portion (not shown) of the bolt on the basis of the position of the large beam 21 is the standard gap dimension, the gap dimension is There is a possibility of fluctuation in the range of standard clearance dimension ± Δg _b / 2 due to construction error.
The difference between the length of the surface 511 c on the proximal end side of the reinforcing member 51 and the length of the surface 511 d on the distal end side in the second direction Y is at least Δg _b + φ × t _f and along the second direction Y if minimum value of the gap dimension the length of the tip-side surface 511d is assumed in the direction (the standard gap dimension -Δg b _{/ 2)} and the same, the gap dimension by construction error ± standard gap size Delta] g b _/ 2 Even if it fluctuates in the range, the transmission of the compressive force by the contact is possible. By adjusting the penetration amount of the reinforcing member 51 in the third direction Z in the gap K, the first contact surface 511 a of the reinforcing member 51 and the lower flange 24 of the large beam 21, the second contact surface 511 b of the reinforcing member 51 and the small beam This is because both of the lower flanges 34 can be reliably brought into contact with each other.
That is, when φ is at least Δg _b / (h−t _f ), it is possible to arrange the reinforcing member 51 and transmit the compressive force even when the gap dimension changes. Hereinafter, Δg _b / (h−t _f ) is referred to as a recommended lower limit φ _{1, req} (rad) of the inclination angle of the wedge surface of the reinforcing member.

  The detachment prevention mechanism is a mechanism for suppressing movement of the main body portion 511 in the direction from the distal end side to the proximal end side. As shown in FIGS. 4 and 6, the retaining mechanism of the beam joining structure 2 according to the present embodiment includes a regulating member 54A and a regulating member insertion hole 54B formed in the main body 511 so as to allow the regulating member 54A to be inserted therethrough. It consists of

  The restriction member 54A is a wedge-shaped plate member whose front and back surfaces are directed in the vertical direction, and whose lower surface is inclined with respect to the lower surfaces of the large beams 21 and the lower flanges 24 and 34 of the small beams 31. The restriction member 54A is inserted into the restriction member insertion hole 54B in a state in which the main body portion 511 is disposed in the gap K, and both ends projecting from the opening of the restriction member insertion hole 54B are the lower surface of the lower flange 24 of the large beam 21 and It is locked from above with the lower surface of the lower flange 34 of the beam 31. That is, both end portions in the second direction Y in the restriction member 54A protrude from the restriction member insertion hole 54B to both sides in the second direction Y, and these both end portions are engaged with the large beam 21 and the small beam 31 respectively. . Thereby, the main body 511 is prevented from being separated from the gap K.

The restriction member insertion hole 54B is formed to penetrate the first contact surface 511a and the second contact surface 511b of the main body 511, and has an upper surface 54B1 and a lower surface 54B2.
The upper surface 54B1 of the restriction member insertion hole 54B is formed to be disposed above (the base end side) the lower surface of the lower flange 34 of the beam 31 in the state where the main body 511 is disposed in the gap K .
The lower surface 54B2 of the restriction member insertion hole 54B is formed so as to be disposed below (lower end side) than the lower surface of the lower flange 34 of the beam 31 when the main body 511 is disposed in the gap K.
According to the restriction member insertion hole 54B formed in this manner, the large beam 21 and the small beam 31 can be adjusted regardless of the distance of the gap K by adjusting the inclination angle and the penetration amount of the lower surface of the wedge-like restriction member 54A. While securely bonding, it is possible to maintain the bonding state.

In the reinforcing member 51 according to the present embodiment, both ends of the regulating member 54A protruding from the opening of the regulating member insertion hole 54B are engaged with the large beam 21 and the small beam 31, but only one end of the regulating member 54A It may be protruded from the opening and locked to any one of the large beam 21 and the small beam 31.
Further, in the reinforcing member 51 according to the present embodiment, the restriction member insertion hole 54B is formed to penetrate the first contact surface 511a and the second contact surface 511b. However, as long as the restricting member 54A is locked to either the support member (large beam 21) or the beam (small beam 31), the restricting member insertion hole 54B may not necessarily penetrate the main body portion 511.
That is, the restriction member insertion hole in which the restriction member 54A is formed so as to be insertable may be formed in only one of the first contact surface 511a and the second contact surface 511b.
Further, the restricting member 54A does not have to be wedge-shaped, and it can be engaged with the support member (large beam 21) or the beam (small beam 31) in the inserted state into the restricting member insertion hole 54B. It is possible to use various shapes such as a flat plate shape and a straight rod shape, or a bolt or the like.

The beam joint structure 2 using the reinforcing member 51 according to the present embodiment is constructed by performing the following steps.
First, the worker arranges the small beam 31 so as to extend from the large beam 21 along the horizontal plane (small beam arrangement step).
Next, a bolt or the like is inserted into the through hole 25a formed in the large beam 21 and the bolt hole 36 formed in the small beam 31, thereby joining the large beam 21 and the end of the small beam 31 (joining process).
Next, the main body portion 511 of the reinforcing member 51 is inserted downward from above into the gap K between the large beam 21 and the small beam 31 (main body portion insertion step).
Next, the restriction member 54A is inserted into the restriction member insertion hole 54B formed in the main body portion 511 (regulation member insertion step).
Then, the deck plate 42 is disposed on the large beam 21 and the small beam 31, concrete is cast on the deck plate 42, and the floor slab 41 is formed above the small beam 31 (floor slab placing process).
The beam joint structure 2 is constructed by performing the above steps.

When a bending moment acts on the small beam 31 by the load of the floor slab 41 of the beam joint structure 2 configured in this way being applied to the small beam 31, the small beam 31 moves downward on the reference plane S. It curves to be convex. The bending moment is a bending moment around an axis along the first direction X.
Under the present circumstances, in the part located in the upper side rather than the neutral axis C1 among the junction parts of the small beam 31 and the large beam 21, the large beam 21 is made center side from the both ends of 2nd direction Y (material axial direction, longitudinal direction). A tensile stress is generated to pull it. In a joint portion between the small beam 31 and the large beam 21, a compressive stress that compresses the large beam 21 from the center in the second direction Y toward both ends is generated in a portion located below the neutral axis C1. Further, tensile stress is transmitted from the small beam 31 to the large beam 21 by the floor slab 41. Further, a compressive stress is transmitted from the small beam 31 to the large beam 21 by the reinforcing member 51 disposed between the large beam 21 and the small beam 31.

As described above, according to the beam joining structure 2 according to the present embodiment, the leading end of the reinforcing member 51 is disposed in the gap K between the large beam 21 and the small beam 31, whereby the large beam 21 and the small beam 31 The joint with this can be reinforced to increase the rotational rigidity. Further, in the reinforcing member 51, the separation distance between the first contact surface and the second contact surface on the base end side is larger than the separation distance between the first contact surface and the second contact surface on the front end side As a result, even if the size of the gap K between the large beam 21 and the small beam 31 varies depending on the location, the reinforcing member 51 is temporarily formed. By adjusting the amount of penetration into the gap K, the size of the second direction Y in the main body portion 511 of the reinforcing member 51 can be changed in accordance with the size of the gap K. If the reinforcing member 51 has a tapered shape in which the size in the second direction Y gradually decreases from the proximal end toward the distal end, this effect can be obtained more reliably.
As described above, regardless of the size of the gap K between the large beam 21 and the small beam 31, the large beam 21 and the small beam 31 can be reliably joined.
Then, even if an external force is applied to the large beam 21 and the small beam 31, the reinforcing member 51 disposed in the gap K reliably transmits the compressive stress from the small beam 31 to the large beam 21 via the reinforcing member 51. be able to.

  Furthermore, even if the reinforcing member 51 is inserted from above into the gap K, an external force is temporarily applied to the large beam 21 and the small beam 31, and the gap K between the large beam 21 and the small beam 31 changes significantly. The main body portion 511 of the reinforcing member 51 moves downward by its own weight. Thereby, since the gap K between the large beam 21 and the small beam 31 can be appropriately filled, the compressive stress from the small beam 31 can be reliably transmitted to the large beam 21 via the reinforcing member 51.

Further, a retaining mechanism for suppressing the detachment of the main body portion 511 from the gap K is realized by inserting the regulating member 54A into a regulating member insertion hole 54B formed in the main body portion 511. Therefore, even if an external force in the direction of separating from the gap K is applied to the reinforcing member 51 by an external force applied to the large beam 21 and the small beam 31, the main body portion 511 of the reinforcing member 51 is It can suppress leaving. Therefore, the connection between the large beam 21 and the small beam 31 can be maintained.
In particular, when the regulating member 54A is locked to both the large beam 21 and the small beam 31, it is possible to more reliably regulate the movement of the reinforcing member 51 in the direction of separating from the gap K. Therefore, separation of the reinforcing member 51 from the gap K can be reliably suppressed.
Furthermore, when the restriction member 54A is arranged such that the front and back faces are in the vertical direction and the upper surface is parallel to the lower surfaces of the lower flanges 24 and 34 of the large beam 21 and the small beam 31, the lower surface is large beam 21 and small It is a wedge-shaped plate material inclined with respect to the lower surface of the lower flanges 24 and 34 of the beam 31. Therefore, the penetration amount of the reinforcing member 51 can be adjusted by the penetration amount in the second direction Y (the material axial direction, the longitudinal direction), and the reinforcing member against the gap K of the lower flanges 24 and 34 of the large beam 21 and the small beam 31 51 is filled securely. Therefore, the compressive stress from the small beam 31 can be reliably transmitted to the large beam 21 through the reinforcing member 51.

  Further, since both the large beam 21 and the small beam 31 are H-shaped steels and the cross-sectional heights are identical to each other, for example, the large beam 21 and the upper beams 23 and 33 have the same height position. When a gap K is provided between the lower flanges 24 and 34 of each of the large beam 21 and the small beam 31 when the beam 31 is joined, the lower flanges 24 and 34 are opened with the gap K to each other. It can be made to face each other. Therefore, by arranging the reinforcing member 51 in the gap K between the lower flanges 24 and 34 facing each other, the large beam 21 and the small beam 31 can be reliably joined.

  Further, since the compressive stress generated from the small beam 31 toward the large beam 21 can be transmitted to the large beam 21 by the reinforcing member 51, the rotational rigidity with respect to the moment generated by the load received by the small beam 31 is enhanced. The connection with the beam 31 can be brought close to the state of rigid connection.

Second Embodiment
Next, a reinforcing member 52 according to a second embodiment of the present invention will be described with reference to FIGS. 7A to 9C.

The reinforcement member 52 which concerns on this embodiment is applied to the building 1 which has the beam joint structure 2 as shown to FIG. 1, FIG. 2 similarly to the reinforcement member 51 which concerns on 1st embodiment. In addition, the main body portion 521 of the reinforcing member 52 includes a first contact surface 521 a extending along a plane perpendicular to the second direction Y, and a second contact surface 521 b extending in a direction intersecting the plane perpendicular to the second direction Y have. That is, in the main body portion 521, the distance between the first contact surface 521a and the second contact surface 521b on the base end side is greater than the distance between the first contact surface 521a and the second contact surface 521b on the tip end side. It is formed to be large.
Further, the main body portion 521 has a base end surface 521c and a tip end surface 521d that connect the ends in the third direction Z of the first contact surface 521a and the second contact surface 521b.
In the reinforcing member 52 according to the present embodiment, the configuration of the retaining mechanism is different from that of the above-described reinforcing member 51. In the following description, the same reference numerals are given to members or portions having the same configuration, and overlapping descriptions will be omitted.

As shown in FIGS. 7A and 7B, the retaining mechanism of the reinforcing member 52 according to the present embodiment is configured by the protrusions 55 that are provided in a plurality of stages on the second contact surface 521b of the main body 521. Each protrusion 55 is continuously formed linearly along the first direction X. In addition, the plurality of protrusions 55 are provided so as to form a plurality of steps from the proximal end toward the distal end.
The protrusions 55 adjacent to each other form a recessed groove that is recessed toward the inner side (the main body portion 521 side) in the second direction Y in the reinforcing member 52. Therefore, when the projections 55 are formed in n steps, (n-1) concave grooves are formed along the first direction X.
The protrusions 55 may be formed along a direction intersecting the first direction X at a predetermined angle, or may be formed intermittently.

  The plurality of projections 55 are provided on the second contact surface 521b of the main body 521, and as shown in FIG. 7B, are engaged with the small beams 31 to inhibit movement of the main body 521 toward the proximal end.

  Then, as shown in FIG. 7B, the plurality of stages of protrusions 55 provided to project from the second contact surface 521b are engaged with the small beam 31 in the state where the main body portion 521 is disposed in the gap K. Thereby, the separation of the main body 521 from the gap K between the large beam 21 and the small beam 31 is suppressed.

Each protrusion 55 has a proximal end contact surface 55 a that is inclined and opposed to the proximal end side of the reinforcing member 52 and a distal end side contact surface 55 b that is opposed to the distal end side of the reinforcing member 52.
In the reinforcing member 52, when viewed in the first direction X, the proximal end contact surface 55a is formed to be inclined with respect to the third direction Z, and the distal end contact surface 55b is formed along the second direction Y. ing.
The base end side contact surface 55a is a surface with which the ridge line of the lower surface of the lower flange 34 of the beam 31 contacts the side surface, and gradually in the second direction Y from the tip side toward the base end It extends toward the inner side of 521).
The distal side contact surface 55b is a surface with which the upper surface of the lower flange 34 of the beam 31 contacts, and is connected to the proximal side contact surface 55a via a ridge line. The tip side contact surface 55b may be opposed to the upper surface of the lower flange 34 with a gap.

  As described above, the proximal contact surface 55 a is a surface with which the boundary between the lower surface and the side surface of the lower flange 34 of the beam 31 contacts, and the distal contact surface 55 b is the surface of the lower flange 34 of the beam 31. The upper surface is the contact surface. Therefore, the separation distance in the third direction Z between ridge lines of the protrusions 55 in adjacent steps is set larger than the thickness of the lower flange 34.

  According to the reinforcing member 52 configured as described above, when an external force is applied to the main body portion 521 to move the main body portion 521 upward and separate it from the gap K, the base end side contact surface 55 a , The end of the lower flange 34 is caught and locked. For this reason, the protrusion 55 on the second contact surface 521b side can suppress the detachment of the main body 521 from the gap K between the large beam 21 and the small beam 31.

  Also, if the reinforcing member 52 is inserted from above into the gap K, even if an external force is applied to the large beam 21 and the small beam 31 and the gap K between the large beam 21 and the small beam 31 changes significantly. The main body portion 521 of the reinforcing member 52 moves downward by its own weight. As a result, since the gap K between the large beam 21 and the small beam 31 can be appropriately filled in the protrusion 55 of the step on the base end side of the reinforcing member 52, the compressive stress from the small beam 31 can be reduced. Can be transmitted to the girder 21 reliably.

As described above, since the reinforcing member 52 according to the present embodiment has the protrusion 55 on the second contact surface 521b side as the retaining mechanism, for example, a configuration using a member other than the main body as the retaining member In comparison, the increase in the number of parts can be suppressed, and the configuration can be simplified.
In this embodiment, as a retaining mechanism, a second protrusion is provided on the second contact surface 521b of the main body 521, and is engaged with the small beam 31 to inhibit movement of the main body 521 toward the proximal end. Although only the protrusion 55 on the side of the contact surface 521b is provided, the protrusion on the first contact surface 521a of the main body portion 521 is provided instead of the protrusion on the side of the second contact surface 521b. Only a protrusion on the first contact surface 521 a side may be provided to suppress movement of the portion 521 to the proximal end side. Alternatively, both the protrusion on the first contact surface 521 a side and the protrusion on the second contact surface 521 b side may be provided.

(First modification)
8A and 8B show a first modification of the reinforcing member 52 according to the second embodiment. In the first modified example, the retaining mechanism is constituted by a plurality of stages of protrusions 56 protruding from the second contact surface 521 b of the main body 521.
Each protrusion 56 has a proximal end contact surface 56 a that is inclined and opposed to the proximal end side of the reinforcing member 52 and a distal end side contact surface 56 b that is opposed to the distal end side of the reinforcing member 52.

In the reinforcing member 52 according to the first modified example, when viewed in the first direction X, the proximal end contact surface 56a is formed along the second direction Y, and the distal end contact surface 55b is in the third direction Z. It is formed to be inclined.
The proximal contact surface 56a is a surface with which the lower surface of the lower flange 34 of the beam 31 contacts, and is connected to the distal contact surface 56b via a ridge line.
The distal side contact surface 56b is a surface with which the boundary between the upper surface and the side surface of the lower flange 34 of the small beam 31 contacts, and gradually in the second direction Y from the proximal side toward the distal side It extends toward the inner side of 521). The tip side contact surface 56 b may be opposed to the upper surface of the lower flange 34 with a gap.

  According to the reinforcing member 52 according to the first modification, when an external force is applied to the main body portion 521 to move the main body portion 521 upward and separate it from the gap K, the base end side contact surface 56 a Is caught on the lower surface of the lower flange 34 and locked. Therefore, the protrusion 56 on the second contact surface 521b side can prevent the main body 521 from coming out of the gap K between the large beam 21 and the small beam 31.

(Second modification)
9A to 9C show a second modification of the reinforcing member 52 according to the second modification. In the second modified example, the retaining mechanism is constituted by a plurality of stages of projections 57 protruding from the second contact surface 521 b of the main body 521.
The respective projections 57 are, similar to the projections 55 of the reinforcing member 52 according to the second embodiment, a proximal end contact surface 57 a inclined toward the proximal end side of the reinforcing member 52 and a distal end side of the reinforcing member 52. And an opposing distal contact surface 57b.
In the reinforcing member 52 according to the second modification, the separation distance in the third direction Z between the tips of the protrusions 57 of adjacent steps is set to be smaller than the thickness of the lower flange 34.
In the reinforcing member 52 according to the second modification, when viewed in the first direction X, the base end contact surface 57a is formed to be inclined with respect to the third direction Z, and the tip end contact surface 57b is in the second direction. It is formed along Y.
As shown in FIG. 9C, the base end side contact surface 57a is a boundary between the lower surface and the side surface of the lower flange 34 of the beam 31 when the beam 31 is deformed due to its own weight or an external force in the vertical direction. Is the site of contact. The proximal end contact surface 57 a extends gradually inward in the second direction Y (inward of the main body portion 521) as it goes from the distal end side to the proximal end side.
The distal side contact surface 57b is a surface with which the upper surface of the lower flange 34 of the beam 31 contacts, and is connected to the proximal side contact surface 55a via a ridge line. The tip side contact surface 57b may be opposed to the upper surface of the lower flange 34 with a gap. As shown in FIG. 9C, when the distal end side contact surface 57b is bent due to its own weight or external force in the vertical direction with respect to the small beam 31, even the surface with which the boundary between the upper surface and the side surface of the small beam 31 contacts. is there.

  Further, as shown in FIG. 9C, when the ridge line between the proximal end contact surface 57a and the distal end contact surface 57b is bent with respect to the small beam 31 due to its own weight or an external force in the vertical direction, as shown in FIG. It deforms so as to collapse inward.

  According to the reinforcing member 52 according to the second modification, the base end side contact surface 57 a is formed on the end edge of the lower flange 34 when the small beam 31 is bent due to its own weight or an external force in the vertical direction. It will be caught and locked. Therefore, the protrusion 57 on the second contact surface 521b side can prevent the main body 521 from being separated from the gap K between the large beam 21 and the small beam 31.

In the state where the reinforcing member 52 is disposed in the gap K, the inclination angle between the surface including the ridge lines of the projections in the plurality of steps and the surface perpendicular to the material axial direction of the beam 31 is the inclination angle It is preferable that φ (rad) be formed to satisfy the following equation (1).
^{φ ≦ wl 3 / 24EI ··· (} 1)
Here, E is the Young's modulus (N / mm ² ) of the beam 31, I is the cross-sectional secondary moment (mm ⁴ ) of the beam 31, and w is a fixed supported by the beam 31 The load is an evenly distributed load (kN / m), and l is the length (mm) of the beam 31. w is an equally distributed load due to the fixed load shared by the small beam 31. For example, when the small beam 31A in FIG. 2 is targeted, an area A indicated by a dashed dotted line in FIG. The mass of beam 31A in area A, deck plate 42, floor slab 41, reinforcement in the floor slab not shown but not in the figure, finish material is calculated and the product of the sum of these and gravity acceleration is divided by the control area Use the same value. The region A is a region bounded by the middle portion of the beam 31 adjacent to the beam 31 A and surrounded by the boundary and the edge of the floor slab. The mass is obtained by determining the volume (m ³ ) of each of the small beams 31A in the region A, the deck plate 42, the floor slab 41, the reinforcing bars in the floor slab (not shown), and the finish (not shown) It is obtained by multiplying (kg / m ³ ).

The joint is pinned before the concrete of the floor slab 41 is hardened. Therefore, the rotation angle of the joint of the beams that are pin joints is obtained by wl 3 ^/ 24EI. Therefore, the inclination angle φ ^is, wl 3 / 24EI (rad) is less than or equal, when the deflection by an external force to its own weight and the vertical direction with respect to the beams 31 as shown in FIG. 9C occurs, the proximal contact surface 57a can be securely hooked to the end edge of the lower flange 34 and locked. For this reason, by forming the projections 57 in a plurality of stages so as to satisfy the equation (1), it is possible to prevent the main body 521 from being separated from the gap K between the large beam 21 and the small beam 31. ^Hereinafter, wl 3 / recommended maximum value of the inclination angle of the wedge surfaces of the reinforcing member 24EI φ _u, referred to as req (rad).
The recommended upper limit value φ _{u, req} (rad) indicates the upper limit of a desirable inclination angle for locking the protrusion to the lower flange, and an index independent of the above-described recommended lower limit value φ _{l, req} (rad) It is. Therefore, the recommended upper limit φ _{u, req} (rad) is not necessarily larger than the recommended lower limit φ _{l, req} (rad).

In addition, it is preferable that the inclination angle which the inclination angle (phi) of the reinforcement member 52 which concerns on this embodiment makes with the 2nd contact surface 511b and the surface perpendicular | vertical to 2nd direction Y is more than 0 (rad), and lower It is further preferable to satisfy the formula (2).
φ ≧ Δg _b / (h−t _f ) (2)
Here, Δg _b is an assumed error (mm) of the gap due to a construction error. Further, h is the height in the Z direction of the reinforcing member (the distance between the surface 511c on the base end side and the surface 511d on the tip end side). Δg _b is, for example, a construction error that may occur at the joint of the small beam 31 and the second shear plate 25 and the difference in diameter between the bolt hole 36 and the shaft (not shown) of the bolt or the through hole 25a and the bolt It is equal to the difference in diameter with the shaft (not shown).
Even when the gap dimension fluctuates in the range of the standard gap dimension ± Δg _b / 2 due to a construction error, the penetration amount of the reinforcing member 51 in the third direction Z in the gap K is adjusted to adjust the number of reinforcement members 51 Both the one contact surface 511a and the lower flange 24 of the large beam 21, the second contact surface 511b of the reinforcing member 51, and the lower flange 34 of the small beam 31 can be reliably brought into contact with each other. . Therefore, Δg _b / (h−t _f ) can be set as the recommended lower limit φ _{1, req} (rad) of the inclination angle of the wedge surface of the reinforcing member.

Third Embodiment
Next, a beam joint structure 2 'according to a third embodiment of the present invention will be described with reference to FIG. In the present embodiment, the members and portions described in the first embodiment and the second embodiment described above are denoted by the same reference numerals and descriptions thereof will be omitted, and only different points will be described.

As shown in FIG. 10, in the beam joint structure 2 'according to the present embodiment, a large beam 21 as a beam is joined to a column 11 as a support member. The pillar 11 is made of RC (Reinforced Concrete). The pillars 11 and the girder 21 are semi-rigidly joined via the first shear plate 14 (see FIG. 4 and not shown in FIG. 10) as described above. The reinforcing member 53 is disposed in the gap K between the core wall 10 and the large beam 21. The reinforcing member 53 is located below the neutral axis C 2 of the large beam 21 in the gap K, and is disposed in a portion located between the lower flange 24 of the large beam 21 and the column 11.
Further, the surface of the column 11 to which the large beam is attached extends in the vertical direction (substantially vertical direction) as a whole, and the surface thereof is formed substantially flat.

In the third embodiment, in the main body portion 531 of the reinforcing member 53, the first contact surface 531a in contact with the column 11 as the support member extends in the vertical direction, and the material axis of the large beam 21 as the beam The second contact surface 531b in contact with the end face of the direction extends in the direction closer to the first contact surface 531a as it goes in the direction perpendicular to the vertical direction and in the direction of the leading end in the vertical direction (in this case, downward). Have a shape. Moreover, while the 1st contact surface 531a is formed in substantially flat shape, the 2nd contact surface 531b becomes an aspect inclined with respect to the 1st contact surface 531a.
In addition, a plurality of projections 58 are formed on the second contact surface 531 b as a retaining portion. The protrusion 58 may be a protrusion as described in the second embodiment, and the description thereof is omitted here.
Here, in the outer surface of the main body portion 531 of the reinforcing member 53, the contact area of the first contact surface 531a in contact with the column 11 can be larger than the contact area of the second contact surface 531b in contact with the large beam 21. It has become. That is, the first contact surface 531a contacts the column 11 over substantially the entire area of the first contact surface 531a (in particular, in the case of the third embodiment, the first contact surface 531a and the surface of the column 11 are the first Surface contact is made over the entire surface of the contact surface 531a.). On the other hand, since the second contact surface 531b is a surface inclined with respect to the first contact surface 531a, the second contact surface 531b contacts all or part of the end surface of the lower flange 24 of the large beam 21.

  As described above, according to the reinforcing member 53 according to the present embodiment, among the contact surfaces of the main portion 531 of the reinforcing member 53 with the column 11 and the large beam 21, the column 11 has a smaller resistance to compressive stress than steel. The first contact surface 531a in contact with the concrete material is larger than the contact area in the second contact surface 531b in contact with the large beam 21 which is a steel material so that the contact area of the column 11 with the concrete material can be made as large as possible. By securing a large size, it is possible to reduce the surface pressure generated in the concrete when compressive stress is applied to the reinforcing member 53, and damage to the surface of the concrete can be suppressed.

  As mentioned above, although the present invention was explained in full detail based on the first embodiment to the third embodiment, the concrete composition is not restricted to this embodiment, and the change of composition in the range which does not deviate from the gist of the present invention, combination , Deletion etc. are also included. Furthermore, each of the configurations shown in the embodiments may be combined as appropriate.

For example, in the first embodiment and the second embodiment, the support member is the large beam 21 and the beam is the small beam 31. However, the present invention is not limited to such an aspect. The support member may be the core wall 10 or the column 11, and the beam may be the large beam 21.
In the third embodiment, the support member is the column 11 and the beam is the large beam 21. However, the configuration is not limited to this. The support member may be the core wall 10 or the girder 21, and the beam may be the girder 31.

Moreover, although the said 1st embodiment and the said 2nd embodiment showed the structure by which the small beam 31 is semi-rigidly joined to the large beam 21 by the 2nd shear plate 25, it is not restricted to such an aspect. The beam 31 may be pin-joined to the beam 21.
In the third embodiment, the large beam 21 is semi-rigidly joined to the column 11 by the first shear plate 14. However, the present invention is not limited to such an embodiment. The girder 21 may be pinned to the column 11.

  Further, a through hole 25 a is formed in the second shear plate 25 of the large beam 21, a bolt hole 36 is formed in the web 32 of the small beam 31, and a bolt is disposed in the through hole 25 a and the bolt hole 36. However, the present invention is not limited to such an aspect. A bolt hole may be formed in the web 22 of the large beam 21, a shear plate having a through hole may be fixed to the small beam 31, and a bolt may be disposed in the through hole and the bolt hole.

Moreover, although the structure by which the through-hole 25a is formed in the 2nd shear plate 25 of the girder 21 was demonstrated, it is not restricted to such an aspect. A through hole may be formed in the web 22 of the girder 21, a shear plate may be disposed on the web 32 of the girder 31, and the shear plate may be joined to the web 22 of the girder 21.
Further, although the configuration in which the reinforcing member 51 is disposed in the gap K formed by the lower flange 24 of the large beam 21 and the lower flange 34 of the small beam 31 has been described, the present invention is not limited thereto. For example, when the height of the cross section of the large beam 21 (the beam height) is larger than the height of the cross section of the small beam 31 (the beam size), the upper flange 23 of the large beam 21 and the upper flange 33 of the small beam 31 in the third direction Z A rib is provided at the same height as the lower flange of the small beam 31 in the third direction Z of the web 22 of the large beam 21, and the rib and the lower flange 34 of the small beam 31 The reinforcing member 51 may be disposed in the gap K formed by
Similarly, when the height of the cross section of the large beam 21 (the beam) is larger than the height of the cross section of the beam 31 (the beam), the configuration shown in FIG. 12 may be used. In the configuration shown in FIG. 12, the upper flanges 23 of the large beam 21 and the upper flange 33 of the small beam 31 in the third direction Z are arranged at the same position. Then, a notch is formed in a part of the upper flange 33 and the web 32 of the small beam 31 so that the upper flange 33 of the small beam 31 becomes shorter along the second direction Y compared to the lower flange 34. The lower flange 34 is directly opposed to the web 22 of the girder 21, and the reinforcing member 51 is disposed in a gap K formed by the lower flange 34 of the girder 31 and the web 22 of the girder 21.

(Example)
Hereinafter, examples of the present invention will be described.
Based on the joint structure of a column and a beam as shown in FIG. 10 described in the third embodiment as Experimental Examples 1 to 7, the specifications of the beam shown in Table 1 and the construction conditions shown in Table 2 Beam joint structure was modeled using the specifications of reinforcement members. The gap between the column and the beam was set to 10 mm.
Experimental Examples 1 to 5 are invention examples, and a reinforcing member (contact plate) as shown in FIG. 10, that is, a contact surface with which an end of a small beam contacts, is formed with a plurality of stages of projections as a retaining portion. A reinforcing member was used. The protrusion height in the second direction Y of the protrusions was 1 mm.
Experimental Examples 6 and 7 are comparative examples, and a reinforcing member in a form in which a protrusion is removed from a reinforcing member as shown in FIG. 10 was used.

As evaluation of functionality about Table 1 and Experimental example 1-7,
(A) The upper limit value Δg (mm) of the variation in the gap dimension in which the reinforcing member can be constructed,
(B) Recommended upper limit φ _{u, req} (rad) of the inclination angle of the wedge surface of the reinforcing member
(C) Recommended lower limit value φ _{l, req} (rad) of the wedge surface inclination angle of the reinforcing member,
(D) Workability against variation in gap size,
(E) shows the retention function by protrusion, and (f) comprehensive evaluation.
Each evaluation is described below.

(A) Upper limit value Δg (mm) of fluctuation of gap dimension which can be reinforced member
The upper limit value Δg (mm) of the variation of the gap dimension in which the reinforcing member can be installed is shown for the reinforcing member used in each of the experimental examples. Δg can be calculated by the following equation.
Δg = (h−t _f ) × φ (3)

(B) Recommended upper limit φ _{u, req} (rad) of the inclination angle of the wedge surface of the reinforcing member
The recommended upper limit value φ _{u, req} (rad) of the inclination angle of the wedge surface of the reinforcing member for functioning the retention prevention by the hooking (locking) of the projection is shown.

(C) Recommended lower limit value φ _{l, req} (rad) of the wedge surface inclination angle of the reinforcement member
The recommended lower limit φ _{1, req} (rad) of the inclination angle of the wedge surface of the reinforcing member when assuming a construction error (Δg _b ) of 2 mm due to the clearance of the bolt is shown.

(D) Workability with respect to variation in gap size The case where φ ≧ φ _{1, req} was evaluated as ◎, and the case where φ <φ _{1, req} was evaluated as Δ.

(E) Retaining function by protrusion The case where both the retaining function by friction between the end of the beam that contacts the reinforcing member in the gap and the protrusion of the reinforcing member and the retaining function by locking the protrusion are exhibited together. It was evaluated. The case where the retaining function by only the friction between the end of the beam and the projection of the reinforcing member was exhibited was evaluated as ○. The case where neither retention function was exhibited was evaluated as x. When the protrusion height of the protrusion is larger than 0 and φ ≦ φ _{u, req} , the retaining function by the locking of the protrusion is exhibited.

(F) Comprehensive evaluation As a comprehensive evaluation, a case where both “applicability to variation in clearance dimension” and “preventing function” are ◎ is ◎ (invention example), and one of ○ or を is を. ○ (invention example), and the case where there is no retaining function is × (comparative example).

From the above embodiments, according to the present invention having the retaining mechanism, the support member and the beam are reliably joined regardless of the size of the gap between the support member and the beam, and the joined state is maintained. I could confirm that I could do it.
Furthermore, in Inventive Examples 1, 2 and 3, when the inclination angle φ is not less than 0.0119 (rad) and less than 0.0126 (rad) and the height of the reinforcing member is 180 mm, removal of the reinforcing member It has been confirmed that it is possible to stably obtain the stopping effect and the effect of securing the workability with respect to the fluctuation of the gap dimension. Further, in the invention examples 4 and 5, when the inclination angle φ is not less than 0.0145 (rad) and less than 0.0177 (rad), the retaining effect of the reinforcing member and the workability with respect to the fluctuation of the gap dimension It has been confirmed that it is possible to stably obtain the effect of securing.
Since Comparative Examples 6 and 7 do not have a protrusion, they do not have a function as a retaining member regardless of the inclination angle. Therefore, the compressive force acting in the normal direction of the inclined wedge surface has a component of the force that is vertically upward, and this force causes the reinforcing member to move in the removal direction. Therefore, the function as a reinforcement member can not be obtained stably.

  According to the present invention, regardless of the size of the gap between the support member and the beam, the support member and the beam can be reliably joined and the joined state can be maintained.

1 Building 2 Beam Joint Structure 21 Large Beam (Support Member)
31 Beams
51, 52, 53 Reinforcing member 511, 521, 531 Main body portion 511a, 521a, 531a First contact surface 511b, 521b, 531b Second contact surface 54A Regulating member 54B Regulating member insertion hole 55, 56, 57, 58 Protrusion C1, C2 neutral axis K gap

Claims (4)

A support member,
A beam whose one end side in the material axial direction is attached to the support member and supported by the support member;
A reinforcing member whose tip is disposed in a gap formed between the support member and the beam ;
Equipped with
The reinforcing member is disposed in a gap formed between the support member and the beam;
The reinforcing member is
A first contact surface contacting the support member and a second contact surface contacting the end face of the beam facing the support member, and the first contact surface and the second contact are directed toward the tip. A body portion formed so as to reduce a distance between the surface and the beam in the material axis direction of the beam;
A retaining mechanism for restraining movement of the main body by locking at least one of the support member and the beam;
Equipped with
The retaining mechanism is constituted by a plurality of stages of protrusions protruding from at least one of the first contact surface and the second contact surface,
In the state where the tip of the reinforcing member is disposed in the gap, an inclination angle formed by a surface including ridge lines of adjacent protrusions and a surface perpendicular to the material axial direction of the beam Beam joint structure characterized in that φ (rad) satisfies the following equation (1) or (2) .
^{φ ≦ wl 3 / 24EI ··· (} 1)
E: Young's modulus of the beam (N / mm ² )
I: second moment of area of the beam (mm ⁴ ),
w: Equal distribution load (kN / m) by fixed load supported by the beam
l: Length of the beam (mm)
φ ≧ Δgb / (h−t _f ) (2)
Δgb: assumed value of the error of the gap in the material axis direction of the beam (mm)
h: height of the reinforcing member in the vertical direction (mm)
t _f : thickness in the vertical direction of the lower flange of the beam The support member is a girder supported by a column,
The beam is a beam supported by the support member,
The beam joint structure according to claim 1 , wherein the support member and the beam are both H-shaped steels, and their sectional heights are the same. A joining member for semi-rigid joining or pin joining the support member and the beam;
The beam joint structure according to claim 1 , wherein the reinforcing member transmits a compressive stress generated from the beam toward the support member to the support member. The first contact surface extends in a direction perpendicular to the material axial direction of the beam;
The second contact surface extends in a direction intersecting the first contact surface;
The plurality of stages of protrusions are provided in a projecting manner on the second contact surface.
The beam joint structure according to any one of claims 1 to 3, characterized in that:

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