JP5978069B2 - Reinforced structure - Google Patents

Description

The present invention relates to a reinforcing structure.
In detail, the reinforcement which unites the horizontal member attached to the outer peripheral part of an existing building, and a pair of reinforcement beam arrange | positioned by the upper surface and lower surface of a horizontal member through the penetration reinforcement which penetrated the horizontal member, and integrates them. Concerning structure.

As an earthquake-proof reinforcement structure of an existing building, a reinforcement frame may be added outside the existing building (see Non-Patent Document 1).
As a means to join the reinforced frame to the existing building, post-installed anchors etc. are driven into the existing slabs such as balcony slabs and tip beam on the outer periphery of the existing building, and the beam of the reinforced frame is fixed to this It is common to do this.

"External seismic retrofitting manual for existing reinforced concrete buildings-Reinforcement with framed steel braces-" Japan Architecture Disaster Prevention Association, September 2002, pp. 44-46, 77

The post-installed anchor has a required embedding length, arrangement pitch, and the like based on its shaft diameter.
However, when the thickness of the member of the existing frame does not have a size for securing the required embedding length for the post-construction anchor, it is impossible to construct an earthquake-proof reinforcement structure by the conventional construction method. It was.

  In addition, since the installation of post-installed anchors into the frame structure is accompanied by noise and vibration, the conventional seismic reinforcement structure, which requires a large number of post-installed anchors, is inconvenient for building users when applied to existing buildings in service. There was a case to give pleasure.

  In addition, when post-installed anchors cannot be used, the case is sandwiched between a pair of steel plates, and these steel plates may be crimped to the case via a tension member. It takes.

  An object of the present invention is to solve the above-mentioned problems, and to provide a reinforcing structure that can be constructed at low cost and without being limited by the member thickness or the like of an existing casing structure. To do.

In order to solve the above problems, the reinforcing structure of the present invention includes an existing horizontal member located on an outer periphery of an existing building, a pair of reinforcing beams respectively disposed above and below the existing horizontal member, and the upper and lower floors A reinforcing column erected between the existing horizontal members and a plurality of penetration reinforcing bars penetrating the existing horizontal members, wherein the pair of reinforcing beams are opposed to each other with the existing horizontal members interposed therebetween. The plurality of penetrating rebars are disposed between the pair of reinforcing beams, and a solidifying material is filled between the existing horizontal member and each reinforcing beam , The reinforcing beam is extended from both side surfaces of the reinforcing column .

  According to this reinforcing structure, even if the thickness of the existing horizontal member is small, the reinforcing frame and the existing horizontal member can be integrated. Therefore, the work is easy because the work of tensioning the tension material is not required.

A stud material is erected on the surface of the reinforcing beam on the side of the existing horizontal member , and end plates are integrally fixed to the upper and lower ends of the reinforcing columns, respectively, and the reinforcing columns on the upper and lower floors are If it is fixed to the existing horizontal member by a joining member penetrating the end plate , the bondability between the reinforcing beam and the existing horizontal member is further enhanced.

  According to the reinforcing structure of the present invention, without reinforcing the casing with a steel plate, or without increasing the number of the casing with concrete, at low cost and without being limited to the member thickness of the existing casing structure, etc. It is possible to integrate the horizontal member and the reinforcing beam disposed so as to be sandwiched from the upper and lower surfaces through a penetration reinforcing bar that penetrates the horizontal member.

It is a perspective view which shows the reinforcement structure which concerns on embodiment of this invention. It is a front view which shows a part of reinforcement structure shown in FIG. It is sectional drawing which shows a part of reinforcement structure shown in FIG. It is AA sectional drawing of FIG.

  As shown in FIG. 1, the reinforcing structure 1 of the present embodiment includes an existing horizontal member 31 located on the outer periphery of the existing building 30, a reinforcing frame 10 installed outside the outer periphery of the existing building 30, and an existing horizontal A plurality of penetrating rebars 20 (see FIG. 2) penetrating the member 31 are provided.

  The reinforcing frame 10 includes a reinforcing column 11 and a reinforcing beam 12 extending from a side surface of the reinforcing column 11 in a direction orthogonal to the reinforcing column 11.

  The reinforcing frame 10 is formed with two upper and lower reinforcing beams 12 for each floor (between the upper and lower existing horizontal members 31, 31), and the left and right reinforcing columns 11, 11 and the upper and lower reinforcing beams 12, 12 Thus, a rectangular frame is formed for each floor.

The reinforcing frame 10 is formed adjacent to the outer wall surface or the window frame on the balcony of each floor of the existing building 30.
Although the material which comprises the reinforcement frame 10 (the reinforcement pillar 11 and the reinforcement beam 12) is not limited, In this embodiment, it is comprised with the H-section steel.

  As shown in FIG. 2, the reinforcing pillar 11 is disposed between the existing upper and lower horizontal members 31 and 31. The upper end of the reinforcing pillar 11 is fixed to the existing horizontal member 31 on the upper floor via the joining member 50, and the lower end of the reinforcing pillar 11 is fixed to the existing horizontal member 31 on the lower floor via the joining member 50. Yes.

End plates 13 and 13 are integrally fixed to the upper and lower ends of the reinforcing column 11, respectively.
Bolt holes are formed in the end plate 13 adjacent to the axis of the reinforcing column 11 (in this embodiment, an H-shaped steel web).

  The bolt hole is a through hole for inserting the joining member 50, and is formed at a position facing the web of the reinforcing column 11.

  The joining member 50 of this embodiment has a bolt 51 and a nut 52 that is screwed to the bolt 51. In addition, the structure of the joining member 50 is not limited. Moreover, what is necessary is just to arrange | position the joining member 50 as needed.

  The shaft portion of the bolt 51 passes through the existing horizontal member 31 and also passes through the bolt holes of the end plates 13 of the reinforcing columns 11 and 11 disposed above and below the existing horizontal member 31.

The head of the bolt 51 is in contact with the lower surface of the end plate 13 of the reinforcing column 11 on the lower floor.
Moreover, the front-end | tip part of the volt | bolt 51 protrudes above the end plate 13 of the reinforcement pillar 11 of an upper floor, and the nut 52 is screwed by this protrusion part.

The upper and lower end plates 13 and 13 are fixed to the existing horizontal member 31 by tightening the nut 52 in this state.
A nut 53 is welded to the upper surface of the end plate 13 of the reinforcing pillar 11 on the lower floor, and the shaft portion of the bolt 51 passes through the nut 53.

  A height adjusting material such as mortar is interposed between the end plate 13 and the existing horizontal member 31.

The reinforcing beam 12 is extended from the upper and lower side surfaces of the reinforcing column 11 in a direction orthogonal to the reinforcing column 11. That is, the upper and lower reinforced beams 12 and 12 are arranged for each floor.
The lower reinforcement beam 12 on the upper floor and the upper reinforcement beam 12 on the lower floor are opposed to each other with the existing horizontal member 31 interposed therebetween.

The upper and lower reinforcing beams 12 are disposed with a gap between the upper and lower existing horizontal members 31.
A gap between the reinforcing beam 12 and the existing horizontal member 31 is filled with a solidifying material 40. Although the material which comprises the solidification material 40 is not limited, In this embodiment, a non-shrink mortar is used.

  As shown in FIG. 2, the distance between the upper and lower reinforcing beams 12, 12 arranged on the same floor is larger than the distance between the existing upper horizontal member 31 and the upper reinforcing beam 12, and the lower floor. Since the distance between the existing horizontal beam 31 and the lower reinforcing beam 12 is larger, the view from the room is not obstructed by the reinforcing beam 12.

The reinforcing beam 12 of the present embodiment is formed by connecting beam members 12a disposed on the left and right.
The beam member 12 a extends from the side surface of the reinforcing column 11 on each floor (between the existing upper and lower horizontal members 31) in a direction (left and right) orthogonal to the reinforcing column 11.

The beam members 12a adjacent to each other on the left and right are connected to each other by joining the webs of the beam members 12a via the splice plate 14 with the end surfaces of the beam members 12a being in contact with each other.
That is, when the web is sandwiched from the front and rear by a pair of front and rear splice plates 14 disposed so as to straddle the boundary between the left and right beam members 12a, and the web members 12a are fastened by bolts penetrating the splice plate 14 and the web. Connected.

  In the present embodiment, as shown in FIG. 1, the joining positions of the beam members 12 a adjacent to the left and right are positions where the bending moment acting on the reinforcing beam 12 is small (positions between the left and right reinforcing columns 11, 11. ). In addition, the joining location of the beam members 12a is not limited.

As shown in FIG. 2, a plurality of stud members 15, 15,... Are erected on the surface of the reinforcing beam 12 on the existing horizontal member 31 side.
The stud material 15 is fixed to the solidified material 40 while being embedded in the solidified material 40.

  In the present embodiment, as shown in FIG. 4, the plurality of stud materials 15, 15,... Are arranged in a staggered manner, but the arrangement of the stud materials 15 is not limited, and is arranged in, for example, one row. It may be. Moreover, the material which comprises the stud material 15 is not limited.

As shown in FIG. 3, the existing horizontal member 31 constitutes a part of the frame structure of the existing building 30 and is integrally connected to the pillar 33 and the beam 34.
The existing horizontal member 31 of the present embodiment is a slab that cantilevered from the slab in the existing building 30 and constitutes a floor portion of a balcony formed outside the existing building 30.

As shown in FIG. 2, a plurality of penetrating reinforcing bars 20, 20,.
The penetrating rebar 20 is disposed between the pair of reinforcing beams 12 and 12 disposed above and below the existing horizontal member 31.

As shown in FIG. 4, the penetration reinforcing bar 20 penetrates the through hole 32 formed in the existing horizontal member 31.
A gap between the penetrating rebar 20 and the through hole 32 is filled with a solidifying material 51 such as non-shrink mortar.

The upper end portion of the penetrating rebar 20 protrudes upward from the upper surface of the existing horizontal member 31 and is fixed to the solidified material 40 between the upper surface of the existing horizontal member 31 and the reinforcing beam 12.
A fixing portion 21 is formed by fixing a nut to the upper end portion of the penetration reinforcing bar 20 of the present embodiment. In addition, the formation method of the fixing | fixed part 21 is not limited, For example, you may join a board | plate material to the edge part of the penetration reinforcing bar 20. FIG.

Further, the lower end portion of the penetrating rebar 20 protrudes downward from the lower surface of the existing horizontal member 31 and is fixed to the solidified material 40 between the lower surface of the existing horizontal member 31 and the reinforcing beam 12.
A fixing portion 21 is formed at a lower end portion of the penetration reinforcing bar 20 of the present embodiment by fixing a nut. The formation method of the fixing unit 21 is not limited.

Next, the construction method of the reinforcement structure of this embodiment is demonstrated.
The construction method of the reinforcing structure includes a drilling step, a first beam arrangement step, a bar arrangement step, a first filling step, a second beam arrangement step, and a second filling step.

The drilling step is a step of forming the through hole 32 in the existing horizontal member 31.
The through holes 32 are formed along the planned arrangement of the reinforcing beams 12.
The pitch and the number of locations of the through holes 32 are not limited and may be set as appropriate.

  The first beam arranging step is a step of arranging the lower reinforcing beam 12 along the lower surface of the existing horizontal member 31.

  When the reinforcing beam 12 is disposed below the existing horizontal member 31, the reinforcing column 11 is erected on the lower side of the existing horizontal member 31, and the reinforcing beam 12 is placed between the adjacent reinforcing columns 11 and 11. Mount.

In order to horizontally mount the reinforcing beam 12, the beam members 12a and 12a formed integrally with the adjacent reinforcing columns 11 and 11 may be connected to each other.
Note that the reinforcing beam 12 may be horizontally mounted by joining to the reinforcing column 11 at the site.

The bar arrangement process is a process of inserting the penetration reinforcing bar 20 through the through hole 32.
The penetration reinforcing bar 20 is temporarily fixed in a state where it is inserted through the penetration hole 32 so that it does not fall.

  The first filling step is a step of filling the solidified material 40 between the lower surface of the existing horizontal member 31 and the upper surface of the lower reinforcing beam 12.

  Although the injection method of the solidifying material 40 is not limited, in the present embodiment, in a state where the formwork is installed on the front surface and the back surface (left and right in FIG. 4) of the gap between the reinforcing beam 12 and the existing horizontal member 31, The solidifying material 40 is injected from the through hole 32. By doing so, the solidification material 40 is filled into the gap between the existing horizontal member 31 and the lower reinforcing beam 12 and the solidification material 51 is filled into the through holes 32 at the same time. In addition, you may perform the filling of the solidification material to the through-hole 32 in a bar arrangement process.

  The second beam arranging step is a step of arranging the upper reinforcing beam 12 along the upper surface of the existing horizontal member 31.

  When the reinforcing beam 12 is disposed above the existing horizontal member 31, the reinforcing column 11 is erected on the upper side of the existing horizontal member 31, and the reinforcing beam 12 is horizontally mounted between the adjacent reinforcing columns 11 and 11. To do.

In order to horizontally mount the reinforcing beam 12, the beam members 12a and 12a formed integrally with the adjacent reinforcing columns 11 and 11 may be connected to each other.
Note that the reinforcing beam 12 may be horizontally mounted by joining to the reinforcing column 11 at the site.

  The second filling step is a step of filling the solidified material 40 between the existing horizontal member 31 and the upper reinforcing beam 12.

  According to the reinforcing structure 1 of the present embodiment, since the penetration reinforcing bar 20 penetrates the existing horizontal member 31 and is fixed to the upper and lower solidified members 51, a necessary fixing length is ensured. Therefore, even when the member thickness of the existing horizontal member 31 is small, the reinforcing frame 10 and the existing horizontal member 31 are integrated without arranging a steel plate or increasing the thickness of the existing horizontal member 31. Can do. Therefore, the work is easier than in the prior art.

  Moreover, since the penetration reinforcing bar 20 has penetrated the existing horizontal member 31, it has a high degree of fixation and can secure a larger installation interval than the post-installed anchor used in the conventional joining method. Therefore, it is possible to reduce the number of wires, to reduce labor during construction, and to minimize the influence on the living environment.

Moreover, since the stud material 15 is erected on the surface of the reinforcing beam 12 on the existing horizontal member 31 side,
The degree of fixation between the reinforcing beam 12 and the solidifying material 40 is increased, and as a result, the bondability between the reinforcing beam 12 and the existing horizontal member 31 is further increased.

Since the horizontal force at the time of an earthquake is transmitted via the existing horizontal member 31, the reinforcement frame 10 can be arrange | positioned, without being restrict | limited to the positional relationship with the structure of the existing building 30. FIG.
Since it is comprised so that the shear force at the time of an earthquake may mutually be transmitted between the reinforcement frame 10 and the existing building 30, a desired reinforcement effect is securable.

  Since reinforcement is performed outside the existing building 30, the influence on the living environment during construction can be minimized.

Since the reinforcing beams 12 are arranged in two stages on each floor, it is possible to reduce the size of the reinforcing beams 12, and as a result, it is possible to reduce the weight of the reinforcing frame 10.
Moreover, it can arrange | position so that the visual field from the inside of the existing building 30 may not be disturbed by adjusting the height of the reinforcement beam 12 arrange | positioned in two steps up and down in each floor.

Further, the reinforcing structure 1 can be employed in any building having the existing horizontal member 31.
Furthermore, since it is possible to perform construction while using the existing building 30, it is difficult for the construction to be restricted in terms of time and time, so that short-term construction is possible as a whole, and costs can be reduced.

As mentioned above, although embodiment which concerns on this invention was described, this invention is not restricted to the said embodiment, In the range which does not deviate from the meaning of this invention, it can change suitably.
For example, in the above-described embodiment, the case where the penetrating reinforcing bars are arranged in one row has been described, but the arrangement of the penetrating reinforcing bars is not limited as long as it is between a pair of reinforcing beams.

  Although the said embodiment demonstrated the case where the existing horizontal member which is a slab protruding on the outer peripheral part of the existing building in the shape of a cantilever was reinforced, the structure of the existing horizontal member is not limited. That is, the existing horizontal member may be an existing beam, for example.

  In the above-described embodiment, the case where the reinforcing frame including the reinforcing columns and the reinforcing beams is formed has been described. However, the reinforcing structure only needs to include the reinforcing beams, and may not necessarily include the reinforcing columns. Good.

DESCRIPTION OF SYMBOLS 1 Reinforcement structure 10 Reinforcement frame 11 Reinforcement pillar 12 Reinforcement beam 15 Stud material 20 Through reinforcement 30 Existing building 31 Existing horizontal member 32 Through hole 40 Solidification material

Claims (2)

An existing horizontal member located on an outer periphery of an existing building, a pair of reinforcing beams respectively disposed above and below the existing horizontal member, a reinforcing column erected between the existing horizontal members on upper and lower floors, and A plurality of penetrating reinforcing bars penetrating the existing horizontal member, and a reinforcing structure comprising:
The pair of reinforcing beams are arranged at positions facing each other across the existing horizontal member,
The plurality of penetration reinforcing bars are disposed between the pair of reinforcing beams,
Between the existing horizontal member and each reinforcing beam, a solidifying material is filled ,
The reinforcing structure is characterized in that the reinforcing beam extends from both side surfaces of the reinforcing column . A stud material is erected on the surface of the reinforcing beam on the side of the existing horizontal member ,
End plates are integrally fixed to the upper and lower ends of the reinforcing pillars,
The reinforcing structure according to claim 1, wherein the reinforcing pillars on the upper and lower floors are fixed to the existing horizontal member by a joining member penetrating the end plate .

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