JP2012255258A - Method for repairing existing lean-to roof and lean-to roof structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for repairing an existing lean-to roof and a lean-to roof structure, which enable deformation behaviors of a purlin and a lean-to roof in the case of an earthquake to be made substantially identical to each other.SOLUTION: Provided is a method for repairing an existing lean-to roof that includes a lean-to roof 11 protruding from a purlin 2, and a lean-to roof column 12 supporting the tip of the lean-to roof 11, in which a brace 13 is disposed for connecting between the tip of the lean-to roof 11 and a column base 22 of the purlin 2, the leg of the lean-to roof column 12 is separated from a foundation 3, and a slide member 14 is interposed between the leg of the lean-to roof column 12 and the foundation 3.

Description

  The present invention relates to a method for repairing an existing shed and a shed structure.

In steel-frame factories, gymnasiums, and the like, there is a case where a lower house is provided beside the main building (see, for example, Patent Document 1).
Such a shed is configured to include a shed roof that protrudes from the main house and a shed pillar that supports the shed roof.

Japanese Utility Model Publication No. 63-13325

  Because the lower house is planned as a lightweight accessory facility, the foundation of the base of the lower house is not integrated with the foundation of the main frame of the main building (the main body of the factory, gymnasium, etc.), and the horizontal strength The braces for use are often composed of relatively simple rebar braces.

  Therefore, the lower house 101 exhibits a deformation behavior different from that of the main frame 102, and when a large external force is applied during an earthquake or the like, the exterior material 110 of the lower house 101 may be deformed out of plane (see FIG. 5). ).

  The present invention solves the above-described problems, and proposes a method for repairing an existing shed and a shed structure that can make the deformation behavior of the main shed and the shed at the time of an earthquake substantially the same. This is the issue.

  In order to solve the above-mentioned problem, a method for renovating an existing shed according to the present invention is a method for renovating an existing shed comprising a shed roof protruding from a main building and a shed pillar that supports the tip of the shed roof. And the brace which connects the front-end | tip part of the said bottom roof and the column base part of the said main building is arrange | positioned, and the leg part of the said bottom column is isolate | separated from the foundation.

  According to the method for renovating the existing shed, the horizontal movement of the shed column is allowed, so that the difference in deformation behavior between the main shed and the shed can be reduced. In addition, since the front-end | tip part of a lower house roof comes to be supported by a brace, even if the leg part of a lower house pillar is isolate | separated from a foundation, a lower house roof will not become unstable.

  If a sliding member is interposed between the leg portion of the lower column and the foundation, the horizontal movement of the lower column is allowed and the axial force can be transmitted to the foundation.

  Further, the lower roof structure of the present invention includes a lower roof extending from the main roof, a lower pillar supporting the front end of the lower roof, a front end of the lower roof, and a column base of the main roof. The lower column is movable in the horizontal direction with respect to the foundation.

  According to such a shed structure, a shed having a small difference in deformation behavior from the main shed can be configured. Moreover, since the front-end | tip part is supported by the brace, the lower roof is stable.

  According to the repair method and the roof structure of the existing roof of the present invention, it is possible to make the deformation behavior of the main frame of the main roof and the roof at the time of an earthquake substantially the same.

It is a side view which shows the lower house structure which concerns on embodiment of this invention. It is an enlarged view which shows the leg part of the lower pillar of the lower house structure shown in FIG. (A) And (b) is a side view which shows each construction step of the repair method of the existing shed, (c) is an enlarged view which shows the leg part of a shed pillar. (A) And (b) is a schematic diagram which shows the deformation | transformation state at the time of the earthquake of a lower house structure. It is a schematic diagram which shows the deformation | transformation condition at the time of the earthquake of the conventional hut.

  A shed structure 10 according to an embodiment of the present invention is a modification of a shed (existing shed) 1 formed as an accompanying facility of a main building 2 that is a gymnasium or a structural building, as shown in FIG. In addition, a lower roof 11, a lower pillar 12, and a brace 13 are provided.

The scale and shape of the lower house 1 are not limited, and are appropriately set according to the purpose of use of the lower house 1.
Further, the structure and purpose of use of the purlin 2 are not limited.

The lower roof 11 is an existing member protruding from the main house 2.
The base end of the lower roof 11 is fixed to the structure of the main building 2 (the main column (column of the main building 2) 21 and beams), and the distal end of the lower roof 11 is fixed to the lower column 12. Has been.

Although the configuration of the lower roof 11 is not limited, in the present embodiment, a frame-shaped beam member 11a and a plate-shaped roof member that covers the opening of the frame-shaped beam member (not shown). It is comprised by.
In addition, the material which comprises a beam member is not limited, For example, timber other than shape steel, such as an angle material, a channel material, H-section steel, may be sufficient.

  The lower column 12 is erected on the foundation 3 via the sliding member 14 and supports the tip of the lower roof 11. The foundation 3 is provided below the lower pillar 12 and is independent of the foundation of the main house 2.

The lower column 12 of the present embodiment is configured to be able to move in the horizontal direction with respect to the foundation 3 and to transmit axial force to the foundation 3.
The material constituting the lower column 12 is not limited, and may be, for example, an angle material, a channel material, a shape steel such as an H-shaped steel, or wood.

  In the present embodiment, as shown in FIG. 2, a sliding member 14 is interposed between the lower column 12 and the foundation 3.

The sliding member 14 according to the present embodiment includes an upper low friction plate member 14 a fixed to the lower end surface of the lower column 12 and a lower low friction plate member 14 b fixed to the upper end surface of the foundation 3.
The low friction plates 14a and 14b are sliding bearings, and the lower surface of the upper low friction plate 14a and the upper surface of the lower low friction plate 14b are in surface contact.

  According to the sliding member 14 in which the low friction plate members 14a and 14b are in contact with each other, sliding in the horizontal direction is possible. The lower low friction plate member 14b has a larger area than the upper low friction plate member 14a, and maintains the contact state with the upper low friction plate member 14a even when the lower column 12 moves horizontally. Axial force can be transmitted to 3.

  In addition, the structure of the sliding member 14 is not limited, For example, the roller member, the spherical member, etc. may be provided.

  The brace 13 is a diagonal member arranged so as to connect the front end portion of the lower roof 11 and the column base portion 22 of the main column 21.

  The brace 13 is made of a material having sufficient rigidity and resistance to the compressive force that acts in the event of an earthquake, for example, an angle material, a channel material (C channel, U-shaped channel, etc.), etc. Consists of steel.

  In this embodiment, although the auxiliary brace 15 which connects the junction part of the lower roof 11 and the main building 2 and the leg part of the lower column 12 is disposed, the auxiliary brace 15 may be disposed as necessary. , May be omitted.

  Next, the repair method of the existing shed for forming the shed structure 10 is demonstrated.

As shown in FIG. 3A, the existing shed 1 before renovation includes a shed roof 11 that projects from the main shed 2, a shed column 12 that supports the tip of the shed roof 11, and tensile bars. Reinforcing bar braces 16 are provided.
The legs of the lower column 12 are pin-joined to the foundation 3 via bolts 31.

  The renovation of the lower house 1 is performed by first removing the reinforcing bar brace 16 and then, as shown in FIG. 3B, a brace 13 having a higher compressive strength than the reinforcing bar brace 16, and Connect the column base 22 of the main building 2. Further, the auxiliary brace 15 having a greater compressive yield strength than the reinforcing bar brace 16 connects the joint of the lower roof 11 and the main house 2 and the leg of the lower pillar 12.

  Next, as shown in FIG. 3 (c), the bolt 31 connecting the lower column 12 and the foundation 3 is cut, and the base mortar 32 interposed between the lower column 12 and the foundation 3 is provided. Remove. Thereby, the leg part of the lower column 12 is separated from the foundation 3.

Thereafter, as shown in FIG. 2, a sliding member 14 is interposed between the lower column 12 and the foundation 3.
At this time, the upper and lower friction plate material 14a may be fixed to the leg portion of the lower column 12 by the adhesive 14c, and the lower and lower friction plate material 14b may be fixed to the upper surface of the foundation 3 through the grout 14d. .
In addition, the fixing method of the sliding member 14 (the upper low friction board | plate material 14a and the lower low friction board | plate material 14b) is not limited.

  According to the renovation structure 10 and the renovation method of the existing remnant of the present embodiment, the horizontal movement of the recliner column 12 is allowed, so that the difference in deformation behavior between the main house 2 and the lower house 1 is reduced. (See FIGS. 4A and 4B). Therefore, it is possible to prevent the exterior of the lower part from being deformed out of the plane and damaged due to the difference in behavior between the main house 2 and the lower house 1.

  By forming a truss structure with the beam member 11a and the brace 13 of the lower roof 11, the vertical rigidity and horizontal rigidity of the lower roof 1 can be increased and integration with the main house 2 can be achieved.

  Further, the weight of the lower house 1 can be transmitted to the main frame (the main house pillar 21) of the main house 2 via the brace 13. Even if the legs of the lower house pillar 12 are separated from the foundation 3, The roof 11 does not become unstable. Therefore, the separation work from the foundation 3 of the lower pillar 12 and the installation work of the sliding member 14 can be performed without requiring a temporary support member for temporarily receiving the axial force of the lower pillar 12.

  Since the sliding member 14 is interposed between the lower column 12 and the foundation 3, the horizontal movement of the lower column 12 is allowed and the axial force can be transmitted to the foundation. Stability is maintained.

  The preferred embodiments of the present invention have been described above. However, the present invention is not limited to the above-described embodiment, and the above-described constituent elements can be appropriately changed without departing from the spirit of the present invention.

  For example, in the above-described embodiment, the case where the existing shed 1 is modified to form the shed structure 10 has been described. However, the shed structure 10 of the present invention may be adopted for a new shed. .

  Moreover, although the said embodiment demonstrated the case where the sliding member 14 was interposed between the lower house pillar 12 and the foundation 3, the sliding member 14 should just be arrange | positioned as needed, and the lower house pillar. If it is not necessary to bear 12 axial forces on the foundation 3, the installation of the sliding member 14 may be omitted.

  Moreover, in the said embodiment, although the lower pillar 12 was isolate | separated from the foundation 3 after arrange | positioning the brace 13, you may arrange | position the brace 13 after isolate | separating the lower pillar 12 from the foundation 3. FIG.

1 hut (existing shed)
DESCRIPTION OF SYMBOLS 10 Lower roof structure 11 Lower roof 12 Lower roof pillar 13 Brace 14 Sliding member 2 Purlin 21 Purlin pillar 22 Leg (column base)
3 basics

Claims (3)

A renovation method for an existing shed comprising a shed roof protruding from a main shed and a shed pillar supporting the tip of the shed roof,
A method for refurbishing an existing shed, wherein a brace for connecting a front end portion of the lower shed roof and a column base portion of the main building is disposed, and a leg portion of the lower shed column is separated from a foundation.   The method for refurbishing an existing shed according to claim 1, wherein a sliding member is interposed between a leg portion of the shed column and the foundation. A lower roof that protrudes from the main house,
A lower pillar supporting the front end of the lower roof;
A brace connecting the tip of the lower roof and the column base of the main house,
A lower house structure, wherein the lower house pillar is movable in a horizontal direction with respect to a foundation.

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