JP3623063B2 - Connection part structure between structural members in a structure - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a connecting portion structure between constituent members for constructing a structure such as a bridge floor slab, for example.
[0002]
[Prior art]
Conventionally, as shown in FIG. 8, a structure such as a bridge floor slab 40 is constructed by continuously joining precast constituent members (also referred to as floor slab units) 41, 42. At the time of construction, the structural members 41 and 42 made of reinforced concrete are butted together, and the concrete 43 is placed on the butted portion on site to join the structural members 41 and 42 together.
[0003]
[Problems to be solved by the invention]
The above-described conventional constituent members 41 and 42 are precast, but it is necessary to cast and join the concrete 43 at the abutting portion between the constituent members 41 and 42, and much labor is required for this placing work. Is required.
[0004]
Then, this invention aims at provision of the connection part structure of the structural members in the structure which can solve the said subject.
[0005]
[Means for Solving the Problems]
Means for solving the problems in the present invention is a connecting portion structure for connecting a plurality of concrete structural members by bringing jointed U-shaped fittings provided on the respective end faces into contact with each other. In addition, a V-shaped recess is formed on the surface of each of the constituent members, and a fastening bolt for joining the one constituent member to the other constituent member is provided on the one constituent member. Inserted into an insertion hole formed so as to incline from the inclined surface of the V-shaped recess of the member toward the joint fitting provided on the other component and open on the surface thereof, and screwed into the threaded portion formed on the fastening bolt The nut member is fixed to the joint fitting provided on the other component member so as to open on the surface thereof, and the joint fittings of both component members are in contact with each other, and between the surfaces of both component members. Hand over Comprising a passing steel sheet bent piece which engages the inclined surface of each other V-shaped recesses are formed at both ends with the, and the threaded portion with inserting the fastening bolt insertion hole of the one component member When the two structural members are connected to each other by screwing into a nut member provided on the other structural member, the bent piece of the transfer steel plate is pressed against the inclined surface of the V-shaped recess at the head of the fastening bolt. It is made to let you .
[0006]
Moreover, the engaging member which has the bending piece engaged with the to-be-engaged recessed part provided in the surface of the other structural member is being fixed to the surface of one structural member.
In the above configuration, the bent members of the engaging member fixed to the surface of one constituent member are aligned so as to engage with the engaged recess formed in the other constituent member, and the constituent members are brought into contact with each other. Then, the fastening bolt is inserted into the insertion hole provided in the constituent member, and the screw portion of the fastening bolt is screwed into the nut member provided in the other constituent member to join the constituent members.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a connecting portion structure according to an embodiment of the present invention will be described with reference to the drawings, taking a floor slab in a bridge as an example.
[0008]
First, a first embodiment of the present invention will be described with reference to FIGS. The floor slab 1 according to the first embodiment is constructed by joining a plurality of components (floor slab 1 unit) to each other.
[0009]
Here, the structure of the first component member 2A and the second component member 2B, which are the basic components of the floor slab 1, will be described.
The first component member 2A is made of concrete and has a rectangular parallelepiped first component member body 3, a first joint fitting 5 having a U-shaped cross section provided on the abutting side surface 4 of the first component member body 3, and a first component From the inclined surface 8 of the V-shaped concave portion 7 formed on one surface of the member main body 3 (which becomes the upper surface of the floor slab 11) toward the butted side surface 10 of the second component member main body (the other component member main body) 9. A plurality (three in the figure) of the first sheath steel pipe 11 embedded in an inclined manner and the first sheath steel pipe 11 spaced apart from the first sheath steel pipe 11 by a predetermined distance in the width direction and at a reverse inclination angle. The first nut member 12 is embedded in the abutting side surface 4. Two first nut members 12 are provided between the first sheath steel pipes 11.
[0010]
The first joint fitting 5 is welded to the base end portions of a plurality (two in the figure) of the anchor rebars 13, and each anchor rebar 13 has a hook 13a formed at the distal end thereof. On the surface of 5 (contact surface) and the surface of the second joint fitting (the other joint fitting) 14 are formed uneven portions (not shown) that fit together.
[0011]
The second component 2B is made of concrete and has a rectangular parallelepiped second component member main body 9, and the second joint fitting 14 having a U-shaped cross section provided on the abutting side surface 10 of the second component member main body 9. , A steel pipe for a second sheath embedded in an inclined manner from the inclined surface 18 of the V-shaped recess 17 formed on one surface of the second component member main body 9 toward the abutting side surface 4 of the first component member main body 3 (in the drawing). 2) and a second nut member 20 embedded in the abutting side face 10 of the second component main body 9 at a reverse inclination angle and spaced apart from the second sheath steel pipe 19 by a predetermined distance in the width direction. A total of three second nut members 20 are provided, one between the second sheath steel pipes 19 and one on each side.
[0012]
The first component member 2 </ b> A and the second component member 2 </ b> B having such a configuration are joined via the joint structure 21 to construct the floor slab 1.
Next, the joint structure 21 will be described in the state where the first joint fitting 5 and the second joint fitting 14 that are in contact with each other and the surfaces of the first joint fitting 5 and the second joint fitting 14 are abutted with each other. The first bent piece 22 and the second bent piece 23 are provided between the first and second surfaces 10 and 16 of the first component member 2A and the second component member 2B and engaged with the inclined surfaces 8 and 18, respectively. A threaded portion 24 a that is inserted into the first steel pipe for steel sheath (insertion hole) 11 inserted through the first steel plate 25 and the first bent piece 22 of the handing steel plate 25 and screwed into the second nut member 20 at the tip. The formed first fastening bolt 24 and the second sheath steel pipe 19 inserted through the second bent piece 23 of the transfer steel plate 25 are inserted into the first nut member 12 and screw portions 26a are formed. The second fastening bolt 26 is made up of.
[0013]
Although not shown, the joint structure 21 as described above is provided on both surfaces of the first component member 2A and the second component member 2B.
However, in the first component member 2A or the second component member 2B corresponding to the end portion of the floor slab 1, when the first component member 2A or the second component member 2B to be joined is only on one side, the joint portions are not necessarily on both sides. Of course, it is not necessary to provide a structure.
[0014]
In the above configuration, when the floor slab 1 is constructed, first, the necessary number of first constituent members 2A and second constituent members 2B are manufactured in advance. That is, the first component member main body 3 and the second component member main body 9 are formed of concrete using a mold, and the inclined surfaces 8 and 18 are formed on the respective component member main bodies 3 and 9.
[0015]
At this time, the first sheath steel pipe 11 and the first nut member 12 are embedded in the first component member main body 3, and the second sheath steel pipe 19 and the second nut member 20 are embedded in the second component member main body 9, respectively. Further, by embedding anchor rebars 13, the first joint fitting 5 and the second joint fitting 14 are joined to the constituent member bodies 3 and 9, respectively.
[0016]
In addition, as shown in FIG. 4, in each steel pipe 11 and 19 for sheaths, the one end is opened to each inclined surface 8 and 18, and the other end is opened to the surface of each joint metal fittings 5 and 14. Similarly, the nut members 12 and 20 are opened on the surfaces of the joint fittings 5 and 14, respectively.
[0017]
In such constituent members, as shown in FIG. 5, the surfaces of the first joint fitting 5 and the first joint fitting 5 are butted together, and as shown in FIG. Each of the second bent pieces 23 is passed so as to engage with the inclined surfaces 8 and 18 of the respective component member main bodies 3 and 9, and the first fastening bolt 24 and the second fastening bolt 26 are attached to the respective steel pipes 11 and 19 for sheath. Then, the fastening bolts 24 and 26 are rotated to fasten the end screws 24a and 26a to the first nut member 12 and the second nut member 20, respectively. The first bent piece 22 and the second bent piece 23 are brought into pressure contact with the inclined surfaces 8 and 18, respectively. In this way, the structural members are sequentially joined to construct the floor slab 1.
[0018]
And, for example, when a bending moment M as indicated by an arrow is applied by passing a vehicle or the like in FIG. 2, the fastening bolts 24 and 26 and the anchor reinforcing bar 13 resist the tensile force, and the compressive force C is applied to the joint portion. Resisting by the upper concrete, the shearing force N is resisted by the fitting of the concavo-convex portions formed on the surfaces of the joint fittings 5 and 14.
[0019]
As described above, according to the first embodiment of the present invention, when the floor slab 1 is constructed, the first joint fittings attached to the first component member main body 3 and the second component member main body 9 which are manufactured in advance. 5. The second fitting 14 is brought into contact with each other, and the first fastening bolt 24 and the second fastening bolt 26 are inserted into the respective steel pipes 11 and 19 for the sheath, and the first fastening bolt 24 and the second fastening bolt 26 are inserted into the first nut. By simply fastening the member 12 and the second nut member 20 to each other, the structural members 2A and 2B can be easily joined to each other and the floor slab 1 can be constructed without performing concrete placing work on site.
[0020]
Further, when the floor slab 1 is partially damaged in maintenance, the first component member 2A or the second component member 2B is replaced by removing the first fastening bolt 24 and the second fastening bolt 26. The floor slab 1 can be easily repaired.
[0021]
Next, a second embodiment of the present invention will be described based on FIG. In the connecting portion structure between the constituent members according to the second embodiment of the present invention, the base end portion is welded to the lower surface of the first joint fitting 5 of the first component member main body 3 to have the same depth as the first joint fitting 5. An engagement plate 30 is provided, and a portion of the lower surface of the second fitting 14 attached to the first component member body 3 is bent into a U-shape that is open on the lower side. A bent piece 32 that is engaged with the engaged recess 31 is formed at the tip of the plywood 30.
[0022]
Since the structure of the other connection part structure is the same as that of the said 1st Embodiment, it abbreviate | omits.
According to this configuration, the engagement plate 30 is welded to the lower surface of the first joint fitting 5 in advance, and when the first component member 2A and the second component member 2B are joined, the bent piece 32 of the engagement plate 30 is attached. The first and second constituent members 2A and 2B are joined in the same manner as in the first embodiment described above, after being aligned so as to engage with the engaged recess 31.
[0023]
In this way, by joining the first component member 2A and the second component member 2B, a bending moment M acts on the joint between the first component member 2A and the second component member 2B, and the first component member Even when a load is applied in the direction of arrow E so as to separate 2A and the second component 2B from each other, the bent piece 32 of the engagement plate 30 is engaged with the engaged recess 31. By being, it can prevent reliably that 2A of 1st structural members and 2B of 2nd structural members separate.
[0024]
Other functions and effects are the same as those in the first embodiment, and will not be described.
[0025]
【The invention's effect】
As is apparent from the above description, the present invention is provided with a fastening bolt for joining one constituent member to the other constituent member, and the other constituent member is screwed into a screw portion formed on the fastening bolt. Since the nut member to be provided is provided, the constituent members can be easily joined to each other without placing concrete by simply inserting the fastening bolt into one of the constituent members and fastening it with the nut member.
[0026]
In addition, since the engagement member fixed to the surface of one component member and the engaged recess formed on the other component member and engaged with the bent piece formed on the engagement member, one component is provided. When a load acts so as to separate the member and the other constituent member, the bent piece of the engaging member is engaged with the engaged recess, so that one constituent member and the other constituent member are Can be reliably prevented from separating.
[Brief description of the drawings]
FIG. 1 is a partially enlarged perspective view showing a joined state of a first component member and a second component member showing a first embodiment of the present invention.
FIG. 2 is a partially enlarged front view showing the joined state of the first component member and the second component member.
FIG. 3 is a cross-sectional view showing a fastened state of the first fastening bolt and the second nut member.
FIG. 4 is a perspective view showing a state where a sheath pipe and a nut member are arranged on the joint fitting.
FIG. 5 is a cross-sectional view showing the same floor slab manufacturing process.
FIG. 6 is a cross-sectional view showing the same floor slab manufacturing process.
FIG. 7 is a partially enlarged cross-sectional view showing a joined state of a first constituent member and a second constituent member showing a second embodiment of the present invention.
FIG. 8 is an enlarged cross-sectional view of a conventional floor slab.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Floor slab 2A 1st structural member 2B 2nd structural member 3 1st structural member main body 5 1st coupling bracket 7 V-shaped recessed part 8 Inclined surface 9 2nd structural member main body 11 Steel pipe 12 for 1st sheaths 1st nut member 13 Anchor Reinforcing bar 14 Second joint fitting 17 V-shaped recess 18 Inclined surface 19 Second sheath steel pipe 20 Second nut member 21 Joint structure 22 First bent piece 23 Second bent piece 24 First fastening bolt 25 Delivery steel plate 26 Two fastening bolts

Claims (2)

A connecting portion structure for connecting a plurality of concrete structural members by bringing a U-shaped joint fitting provided on each end surface into contact with each other, and having a V-shaped concave portion on the surface of each of the structural members. The one component member is provided with a fastening bolt for joining it to the other component member, and the fastening bolt is connected to the other component member from the inclined surface of the V-shaped recess. A nut member that is inserted into an insertion hole formed so as to be inclined toward the joint fitting provided in the constituent member and open on the surface thereof and screwed into a screw portion formed in the fastening bolt is provided in the other constituent member. It is fixed to the joint fitting so as to open on its surface, and the joint fittings of both constituent members are in contact with each other, and are passed between the surfaces of both constituent members and on the inclined surface of each V-shaped recess. Person in charge Screwed into a nut member provided with the threaded portion on the other components with bent pieces comprises a passing steel sheet formed at both ends, and inserting the aforementioned fastening bolts into the insertion hole of the one component member which When the two structural members are connected to each other, the bent piece of the connecting steel plate is pressed against the inclined surface of the V-shaped recess at the head of the fastening bolt. Connection part structure between members. 2. The structure according to claim 1, wherein an engagement member having a bent piece that engages with an engaged recess provided on the surface of the other component member is fixed to the surface of one component member. The connection part structure of the structural members in.

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