Steel frame repair structure, and steel frame repair method

Abstract

To provide a steel frame repair structure capable of easily repairing a steel frame at a low cost, and a steel frame repair method.SOLUTION: The steel frame repair structure is a steel frame repair structure that has erected support pillars and a horizontal frame bridged between the supports. The repair structure includes: a mounting bracket that extends in the vertical direction of the column, each is attached to the support; and two or more new screens between the mounting brackets.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a repair structure for a steel frame and a repair method for a steel frame. [Background technology]

[0002] Conventionally, steel frames, which are steel frameworks filled with filler materials such as stone, have been known for use as dams, retaining walls, or revetments. A steel frame is formed by pillars (supports), horizontal members (horizontal frames), and connecting members (connecting frames), and a screen material is provided on the outer surface, such as the front side (downstream side), and the steel frame is constructed by filling with filler materials such as stone. The weight of the steel frame itself and the filler materials allows the steel frame to resist earth pressure from the rear.

[0003] However, with steel frames, the screen material can become damaged over many years of use or corrode due to aging, causing the screen material to come off. If the screen material comes off, the fill material filled in the steel frame is expected to leak out, so repairs to the existing steel frame have been necessary. For example, Patent Document 1 shown below has been published as a technology for repairing existing steel frames.

[0004] Patent Document 1 discloses a wall structure in which clip nuts are attached to flanges, and screen materials are replaced one by one via the clip nuts. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Laid-Open No. 2016-223191 Summary of the Invention [Problem to be solved by the invention]

[0006] On the other hand, in the wall structure described in Patent Document 1, if the existing screen material is damaged, it is necessary to remove the existing screen material. However, when the existing screen material is removed, there is a possibility that the fill material will leak out. Also, if multiple existing screen materials are damaged, it is necessary to repair each damaged screen material one by one. For these reasons, the wall structure described in Patent Document 1 has the problem of high construction costs.

[0007] The present invention has been devised in view of the above-mentioned problems, and its object is to provide a steel frame repair structure and a steel frame repair method that enable steel frames to be repaired easily and at low cost. [Means for solving the problem]

[0008] The steel frame repair structure of the first invention is a steel frame repair structure having upright supports and a horizontal frame erected between the supports, characterized in that it comprises mounting brackets extending in the upright direction of the supports and attached to each of the supports, and two or more newly installed screen materials between the mounting brackets.

[0009] The steel frame repair structure of the second invention is a steel frame repair structure having upright supports and horizontal frames erected between the supports, characterized in that it comprises mounting brackets extending in the upright direction of the supports and erected between the horizontal frames, and two or more newly installed screen materials between the mounting brackets.

[0010] The steel frame repair structure of the third invention is characterized in that, in the first invention, the mounting bracket is attached to the support via a bolt, and the new screen material is attached to the mounting bracket via a bolt.

[0011] The steel frame repair structure of the fourth invention is characterized in that, in the second invention, the mounting bracket is attached to the horizontal frame via bolts, and the newly installed screen material is attached to the mounting bracket via bolts.

[0012] The steel frame repair structure according to the fifth invention is characterized in that, in the first invention, the mounting bracket has a flange mounting portion that is inserted into the inside of the flange of the H-shaped steel support.

[0013] The steel frame repair structure of the sixth invention is characterized in that, in the fourth invention, the mounting bracket has a fixing portion that is folded back from the flange mounting portion to the outside of the flange in its cross-sectional shape in the erection direction of the support, and to which the newly installed screen material is attached.

[0014] The steel frame repair method according to the seventh invention is a method for repairing a steel frame having erected pillars and a horizontal frame erected between the pillars, and is characterized by comprising a bracket mounting step for attaching mounting brackets extending in the erection direction of the pillars to each of the pillars, and a screen mounting step for arranging two or more new screen materials side by side between the mounting brackets. [Effects of the Invention]

[0015] According to the first to seventh inventions, the steel frame repair structure and repair method include mounting brackets attached to support columns or horizontal frames, and two or more new screen materials between the mounting brackets. This makes it possible to repair the steel frame by, for example, arranging the new screen materials side by side on the mounting brackets in advance, and then attaching the mounting brackets to the support columns or horizontal frames. This makes it possible to repair the steel frame easily and at low cost.

[0016] In particular, according to the third and fourth inventions, the mounting brackets are attached to the posts or horizontal frame via bolts, and the new screen material is attached to the mounting brackets via bolts. This allows each component to be fixed in place by the bolts, making it possible to repair the steel frame more securely.

[0017] In particular, according to the fifth aspect of the present invention, the mounting bracket has a flange mounting portion that is inserted into the inside of the flange of the H-shaped steel support. By inserting the flange mounting portion into the inside of the flange, the flange mounting portion is locked to the flange, eliminating the need to attach connecting members such as bolts. This makes it possible to repair steel frames more easily and at lower cost.

[0018] In particular, according to the sixth aspect of the present invention, the mounting bracket has a fixing portion that is folded back from the flange mounting portion to the outside of the flange and to which the new screen material is attached. This makes it possible to separate the infill structure from the new screen material. This makes it possible to easily repair the steel frame at low cost even when the infill structure contains stones or other infill material or is unstable. [Brief explanation of the drawings]

[0019] [Figure 1] FIG. 1 is a diagram showing an example of a repair frame in the first embodiment. [Figure 2] FIG. 2 is a diagram showing an example of a steel frame in the first embodiment. [Figure 3] FIG. 3 is a diagram showing an example of a view taken along the arrow AA in FIG. 1 in the first embodiment. [Figure 4] FIG. 4 is a diagram showing an example of a view in the direction of an arrow BB in FIG. 1 according to the first embodiment. [Figure 5] Fig. 5(a) is a diagram showing an example of an arrow view in the orthogonal direction of the mounting bracket in the first embodiment, and Fig. 5(b) is a diagram showing an example of an arrow view in the horizontal direction of the mounting bracket in the first embodiment. [Figure 6]Fig. 6(a) is a diagram showing an example of a vertical arrow view of a newly installed screen material in the first embodiment. Fig. 6(b) is a diagram showing an example of an orthogonal arrow view of a newly installed screen material in the first embodiment. Fig. 6(c) is a diagram showing an example of a horizontal arrow view of a newly installed screen material in the first embodiment. [Figure 7] FIG. 7 is a diagram showing an example of C in FIG. 4 in the first embodiment. [Figure 8] FIG. 8 is a diagram showing an example of a repair frame in the second embodiment. [Figure 9] FIG. 9 is a diagram showing an example of the view of the arrow AA in FIG. 8 in the second embodiment. [Figure 10] FIG. 10 is a diagram showing an example of a view in the direction of arrow BB in FIG. 8 according to the second embodiment. [Figure 11] Fig. 11(a) is a diagram showing an example of a vertical arrow view of the mounting bracket in the second embodiment. Fig. 11(b) is a diagram showing an example of an orthogonal arrow view of the mounting bracket in the second embodiment. Fig. 11(c) is a diagram showing an example of a horizontal arrow view of the mounting bracket in the second embodiment. Fig. 11(d) is a diagram showing an example of E in Fig. 11(b) of the mounting bracket in the second embodiment. [Figure 12] FIG. 12 is a diagram showing an example of C in FIG. 10 in the second embodiment. [Figure 13] FIG. 13 is a diagram showing an example of a repair frame in the third embodiment. [Figure 14] FIG. 14 is a diagram showing an example of a view in the direction of arrow BB in FIG. 13 according to the third embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0020] An example of a repair structure 1 according to a first embodiment of the present invention will be described with reference to the drawings.

[0021] The repair structure 1 will be described with reference to Figs. 1 to 4. Fig. 1 is a diagram showing an example of a repair frame 10 in the first embodiment. Fig. 2 is a diagram showing an example of a steel frame 100 in the first embodiment. Fig. 3 is a diagram showing an example of a view in the direction of an arrow AA in Fig. 1 in the first embodiment. Fig. 4 is a diagram showing an example of a view in the direction of an arrow BB in Fig. 1 in the first embodiment.

[0022] As shown in FIG. 1, the repair structure 1 comprises a front frame 9 consisting of a support column 2 erected on the front side (downstream side) of the steel frame 100 in the perpendicular direction y and a horizontal frame 3 erected on the support column 2, and a repair frame 10 provided on the front frame 9. The vertical direction z indicates the direction in which the support column 2 is erected. The horizontal direction x is a horizontal direction perpendicular to the vertical direction. The perpendicular direction y indicates the front direction perpendicular to the vertical direction z and the horizontal direction x. The horizontal direction x may also be the direction in which the horizontal frame 3 is erected. The perpendicular direction y may also be the direction from a filler structure (not shown) to the front frame 9. The perpendicular direction y may also be the direction toward downstream.

[0023] The steel frame 100 is a steel frame filled with a filler material such as stone, and is used as a dam, retaining wall, or revetment. As shown in FIG. 2 , the steel frame 100 is a steel frame formed by upright support columns 2, horizontal frames 3 erected on the support columns 2, and connecting frames 6, and the inside of the framework is filled with a filler material such as stone (not shown). The steel frame 100 may also include a screen material 5 erected on a front frame 9 made up of upright support columns 2 on the front side in the orthogonal direction y and horizontal frames 3 erected on the support columns 2. The front frame 9 is made up of the upright support columns 2 on the front side in the orthogonal direction y and the horizontal frame 3 erected on the support columns 2, and the side frame 8 is made up of the upright support columns 2 on the horizontal side in the horizontal direction x and connecting frames 6 erected on the support columns 2.

[0024] The support pillar 2 is a column erected in the vertical direction z, as shown in Fig. 1, for example. The support pillar 2 may also be erected at an angle to the vertical direction z. As shown in Fig. 4, the support pillar 2 is, for example, an H-shaped steel beam composed of a web 23 and a pair of flanges 22 on both ends of the web 23. The support pillar 2 is preferably an H-shaped steel beam, but is not limited to this, and circular steel beams, square steel beams, CT steel beams, channel steel beams, etc. may also be used.

[0025] As shown in Fig. 4, the horizontal frame 3 is a frame that is erected between the support columns 2. The horizontal frame 3 is attached to the support columns 2 using, for example, bolts or the like (not shown). The horizontal frame 3 may be a channel steel having a U-shaped cross section in the horizontal direction x that opens in the opposite direction to the vertical direction z, but is not limited to this. For example, H-shaped steel, circular steel, square steel, CT steel pipe, L-shaped steel, etc. may also be used.

[0026] The gusset plate 4 is a plate that joins the support column 2 and the horizontal frame 3 together.

[0027] As shown in Figure 1, the repair frame 10 is a frame that is attached to the front frame 9 of an existing steel frame 100 and repairs the front frame 9. The repair frame 10 extends in the vertical direction z of the support columns 2 and includes mounting brackets 11 that are attached to the support columns 2, and two or more new screen materials 12 that are arranged side by side between the mounting brackets 11.

[0028] Fig. 5(a) is a diagram showing an example of the mounting bracket 11 in the first embodiment as viewed in the orthogonal direction y. Fig. 5(b) is a diagram showing an example of the mounting bracket 11 in the first embodiment as viewed in the horizontal direction x. As shown in Fig. 5, the mounting bracket 11 is a flat bracket extending in the vertical direction z. The mounting bracket 11 has screen bolt holes 111 and support bolt holes 112 opened in its main plane.

[0029] FIG. 6(a) is a diagram showing an example of a view of the newly installed screen material 12 in the vertical direction z according to the first embodiment. FIG. 6(b) is a diagram showing an example of a view of the newly installed screen material 12 in the orthogonal direction y according to the first embodiment. FIG. 6(c) is a diagram showing an example of a view of the newly installed screen material 12 in the horizontal direction x according to the first embodiment. As shown in FIGS. 6(a) and 6(b), the newly installed screen material 12 is a beam member extending in the horizontal direction x. As shown in FIG. 6(c), the new screen material 12 is a channel steel having a U-shaped cross-section in the horizontal direction x that opens in the direction opposite the vertical direction z. However, this is not limited to this, and any shape may be used. The new screen material 12 may be configured so that the surface 12a on the orthogonal direction y side is longer in the horizontal direction x than the surface 12c on the opposite side of the orthogonal direction y, and the end of the surface 12b in the horizontal direction x on the vertical direction z side has a tapered shape in which the width increases toward the orthogonal direction y. Furthermore, the newly installed screen material 12 may have bolts 14 provided on the surface 12a on the orthogonal direction y side.

[0030] Next, the mounting structure of the repair frame 10 in the first embodiment will be described with reference to Fig. 7. Fig. 7 is a diagram showing an example of C in Fig. 4 in the first embodiment.

[0031] 7, the mounting bracket 11 is attached to the support pole 2 by being inserted into the inside of the flange 22 of the support pole 2. Alternatively, the mounting bracket 11 may be attached to the inside of the flange 22 of the support pole 2 using bolts 13 inserted into support bolt holes 112.

[0032] 7, the surface 12a of the new screen material 12 is attached to the mounting bracket 11 by bolts 14 inserted into the screen bolt holes 111 of the mounting bracket 11. A plurality of new screen materials 12 may be arranged side by side at regular intervals.

[0033] In addition, instead of the newly installed screen material 12, a panel (not shown) made of wire mesh, expanded metal, structural steel, etc. fitted into a pair of upper and lower horizontal frames and a pair of left and right vertical frames may be attached to the mounting bracket 11.

[0034] Next, we will explain the construction method of the repair structure 1 in this embodiment. The construction method includes a bracket mounting step of mounting the mounting brackets 11 to the posts 2, and a screen mounting step of arranging two or more new screen materials 12 side by side between the mounting brackets.

[0035] First, in the bracket mounting step, as shown in Fig. 7, the mounting bracket 11 is inserted into the inside of the flange 22 of the support pole 2, thereby locking the mounting bracket 11 to the support pole 2. Alternatively, the mounting bracket 11 may be attached to the inside of the flange 22 of the support pole 2 using a bolt 13 inserted into a support pole bolt hole 112.

[0036] Furthermore, in the vertical frame mounting step, the surface 12a of the new screen material 12 is mounted to the mounting bracket 11 by the bolts 14 inserted into the screen bolt holes 111 of the mounting bracket 11. The new screen material 12 may be mounted to the mounting bracket 11 during construction, but this is not limitative and the new screen material 12 may be mounted in advance before construction. Furthermore, if the space between the new screen material 12 and the existing screen material 5 or filler material is large, filler material such as stone may be further placed in the gap.

[0037] The above-described steps complete the construction of the repair structure 1 in the first embodiment. Furthermore, the construction of the repair structure 1 in the first embodiment is not limited to the above-described method and procedure, and may be performed by any method and procedure.

[0038] The repair structure 1 according to the first embodiment has been described above. The repair structure 1 according to the first embodiment comprises mounting brackets 11 attached to the support poles 2, and two or more new screen materials 12 arranged side by side between the mounting brackets 11. This makes it possible to perform repairs by, for example, arranging the new screen materials 12 side by side on the mounting brackets 11 in advance, and then attaching the mounting brackets 11 to the support poles 2. This makes it possible to repair the steel frame 100 easily and at low cost, even if multiple screen materials are damaged.

[0039] Furthermore, in the repair structure 1 according to the first embodiment, the mounting bracket 11 is attached to the support column 2 via the bolt 13, and the new screen material 12 is attached to the mounting bracket 11 via the bolt 14. This allows each member to be fixed by the bolts 13 and 14, making it possible to repair the steel frame 100 more firmly.

[0040] Furthermore, in the repair structure 1 according to the first embodiment, the mounting bracket 11 is inserted inside the flange 22 of the H-shaped steel support column 2. This allows the mounting bracket 11 to be locked to the flange 22, eliminating the need to attach connecting members such as bolts 13. This makes it possible to repair the steel frame 100 more easily and at lower cost.

[0041] Furthermore, in the repair structure 1 according to the first embodiment, the surface 12a of the new screen material 12 on the orthogonal direction y side is longer in the horizontal direction x than the surface 12c on the opposite side of the orthogonal direction y, and the end of the horizontal direction x of the surface 12b in the vertical direction z has a tapered shape that widens in width toward the orthogonal direction y. This makes it possible to ensure space for attaching the bolts 14 when attaching the new screen material 12 to the mounting bracket 11 using the bolts 14. This makes it possible to repair the steel frame 100.

[0042] Next, an example of a repair structure 1 in a second embodiment of the present invention will be described with reference to Figs. 8 to 10. Fig. 8 is a diagram showing an example of a repair frame 10 in the second embodiment. Fig. 9 is a diagram showing an example of a view of an arrow in the AA direction in Fig. 8 in the second embodiment. Fig. 10 is a diagram showing an example of a view of an arrow in the BB direction in Fig. 8 in the second embodiment. Furthermore, as shown in Figs. 8 and 9, the repair structure 1 in the second embodiment differs from the repair structure 1 in the first embodiment in that the newly installed screen material 12 is offset in the orthogonal direction y. Furthermore, descriptions similar to those in the first embodiment will be omitted.

[0043] As shown in Fig. 8, the front frame 9 further includes a screen material 5 installed between the horizontal frames 3 or between the support columns 2. The screen material 5 is a linear beam member extending in the vertical direction z. As shown in Fig. 10, the cross-sectional shape of the screen material 5 in the vertical direction z is a channel steel having a U-shape that opens in the opposite direction to the horizontal direction x, but the shape is not limited to this and may be any shape.

[0044] FIG. 11(a) is a diagram showing an example of a view of the mounting bracket 11 in the vertical direction z according to the second embodiment. FIG. 11(b) is a diagram showing an example of a view of the mounting bracket 11 in the orthogonal direction y according to the second embodiment. FIG. 11(c) is a diagram showing an example of a view of the mounting bracket 11 in the horizontal direction x according to the second embodiment. FIG. 11(d) is a diagram showing an example of E in FIG. 11(b) of the mounting bracket 11 in the second embodiment. As shown in FIG. 11(a), in a cross section in the vertical direction z, the mounting bracket 11 has a flange mounting portion 113 extending in the horizontal direction x, a folded portion 114 folded back from the flange mounting portion 113 in the orthogonal direction y so as to form an L-shape, and a fixing portion 115 folded back from the folded portion 114 in the opposite direction of the horizontal direction x so as to form an L-shape. The mounting bracket 11 does not necessarily have to be provided with the fixing portion 115.

[0045] 11(b) and 11(c), the flange mounting portion 113 is a flat plate-shaped portion extending in the vertical direction z. The flange mounting portion 113 has support bolt holes 112 formed in the main plane thereof.

[0046] The folded portion 114 is a flat portion extending in the vertical direction z, and is provided on both sides in the orthogonal direction y such that the flange attachment portion 113 and the fixing portion 115 are perpendicular to each other. Furthermore, the folded portion 114 is folded back from the flange attachment portion 113 at a right angle to the orthogonal direction y, but this is not a limitation and the folded portion 114 may be folded back toward the orthogonal direction y at any angle.

[0047] The fixing portion 115 is a flat portion extending in the vertical direction z. The fixing portion 115 has screen bolt holes 111 formed in its main plane. The fixing portion 115 is folded back at a right angle from the folding back portion 114 in the opposite direction to the horizontal direction x, but this is not a limitation and the fixing portion 115 may be folded back at any angle.

[0048] Next, the mounting structure of the repair frame 10 in the second embodiment will be described with reference to Fig. 12. Fig. 12 is a diagram showing an example of C in Fig. 10 in the second embodiment.

[0049] As shown in Figure 12, the flange mounting portion 113 of the mounting bracket 11 is inserted into the inside of the flange 22 of the support 2, and the new screen material 12 is attached to the fixing portion 115 using bolts 14. The flange mounting portion 113 may also be attached to the inside of the flange 22 of the support 2 using bolts 13. If the fixing portion 115 is not provided on the mounting bracket 11, the new screen material 12 may be attached to a folded portion 114 that is folded back to the outside of the flange 22 of the mounting bracket 11.

[0050] Next, a description will be given of a construction method for the repair structure 1 in the second embodiment. The construction method includes a bracket mounting step of mounting the mounting brackets 11 to the posts 2, and a screen mounting step of arranging two or more new screen materials 12 side by side between the mounting brackets.

[0051] First, in the bracket mounting step, as shown in Fig. 12, the flange mounting portion 113 of the mounting bracket 11 is inserted into the inside of the flange 22 of the support pole 2, thereby locking the mounting bracket 11 to the support pole 2. Alternatively, the flange mounting portion 113 of the mounting bracket 11 may be attached to the inside of the flange 22 of the support pole 2 using a bolt 13 inserted into a support pole bolt hole 112. Also, in the bracket mounting step, the folded portion 114 is attached so as to protrude outward from the flange 22 in the orthogonal direction y.

[0052] In addition, in the vertical frame mounting step, the surface 12 a of the new screen material 12 is mounted to the fixing portion 115 of the mounting bracket 11 by the bolt 14 inserted into the screen bolt hole 111 of the mounting bracket 11 .

[0053] The above-described steps complete the construction of the repair structure 1 in the second embodiment. Furthermore, the construction of the repair structure 1 in the second embodiment is not limited to the above-described method and procedure, and may be carried out by any method and procedure.

[0054] In the repair structure 1 according to the second embodiment, the mounting bracket 11 has a flange mounting portion 113 that is inserted into the inside of the flange 22 of the H-shaped steel support 2. As a result, by inserting the flange mounting portion 113 into the inside of the flange 22, the flange mounting portion 113 is locked to the flange 22, eliminating the need to attach connecting members such as bolts 13. This makes it possible to repair the steel frame 100 more easily and at lower cost.

[0055] Furthermore, in the repair structure 1 according to the second embodiment, the mounting bracket 11 is folded back from the flange mounting portion 113 in the orthogonal direction y, which is outside the flange 22, and has a fixing portion 115 to which the new screen material 12 is attached. This makes it possible to separate the fill structure (not shown) from the new screen material 12. Therefore, even if the fill structure (not shown) contains fill material such as stone or is unstable, the new screen material 12 can be attached without removing the existing screen material 5, making it possible to repair the steel frame 100 easily and at low cost.

[0056] Next, an example of a repair structure 1 in a third embodiment of the present invention will be described with reference to the drawings. Fig. 13 is a diagram showing an example of a repair frame 10 in the third embodiment. Fig. 14 is a diagram showing an example of the third embodiment as viewed in the direction of the arrow BB in Fig. 13. The repair structure 1 in the third embodiment differs from the repair structure 1 in the first embodiment in that the mounting bracket 11 is provided on the connecting frame 6 or the horizontal frame 3. Furthermore, descriptions similar to those in the first embodiment will be omitted.

[0057] 13, the repair structure 1 includes a side frame 8, which is made up of a support column 2 erected on the horizontal direction x side of a steel frame 100 and a connecting frame 6 erected on the support column 2, and a repair frame 10 provided on the side frame 8. The repair frame 10 may also be provided on a front frame 9.

[0058] 13 and 14, the repair frame 10 extends in the vertical direction z of the support pillars 2 and includes mounting brackets 11 installed between the connecting frames 6, and two or more new screen materials 12 installed side by side between the mounting brackets 11. The repair frame 10 may also include mounting brackets 11 installed between the horizontal frames 3 of the front frame 9, and two or more new screen materials 12 installed side by side between the mounting brackets 11.

[0059] The mounting bracket 11 is attached to the connecting frame 6 or the horizontal frame 3 via a bolt 18, for example, at the end in the vertical direction z.

[0060] The new screen material 12 is attached to the mounting bracket 11 at its end in the horizontal direction x via a bolt 17.

[0061] Next, a description will be given of a construction method for the repair structure 1 in the third embodiment. The construction method includes a bracket mounting step of mounting the mounting brackets 11 to the connecting frame 6 or the horizontal frame 3, and a screen mounting step of arranging two or more new screen materials 12 side by side between the mounting brackets 11.

[0062] First, in the bracket mounting step, as shown in Fig. 13, both ends of the mounting bracket 11 in the vertical direction z are mounted to the connecting frame 6 or the horizontal frame 3. In this case, the mounting bracket 11 may be mounted to the connecting frame 6 or the horizontal frame 3 using, for example, bolts 18.

[0063] In the vertical frame mounting step, both ends of the new screen material 12 in the horizontal direction x are mounted to the mounting brackets 11 using bolts 17, and two or more new screen materials 12 are arranged side by side between the mounting brackets 11. The new screen materials 12 may be mounted to the mounting brackets 11 during construction, but this is not limitative and they may be mounted in advance before construction.

[0064] The above-described steps complete the construction of the repair structure 1 in the third embodiment. Furthermore, the construction of the repair structure 1 in the third embodiment is not limited to the above-described method and procedure, and may be performed by any method and procedure.

[0065] The repair structure 1 according to the third embodiment comprises mounting brackets 11 attached to the connecting frame 6 or the horizontal frame 3, and two or more new screen materials 12 arranged side by side between the mounting brackets 11. This makes it possible to perform repairs by, for example, arranging the new screen materials 12 side by side on the mounting brackets 11 in advance, and then attaching the mounting brackets 11 to the connecting frame 6 or the horizontal frame 3. This makes it possible to repair the steel frame 100 easily and at low cost, even if multiple screen materials 5 are damaged.

[0066] Although the embodiments of the present invention have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be embodied in various other forms, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. These embodiments and their modifications are included within the scope and spirit of the invention, and are also included in the inventions and their equivalents as defined in the claims. [Explanation of symbols]

[0067] 1 Repair structure 2 pillars 3 horizontal frames 4 Gusset Plate 5 Screen material 6 Connecting Frame 8 Side Frame 9 Front frame 10 Repair frame 11 Mounting bracket 12 New Screen Material 13 volts 14 volts 17 volts 18 volts 22 flange 23 Web 100 steel frame 111 Screen bolt hole 112 Bolt holes for support posts 113 Flange mounting part 114 Folded section 115 Fixed part

Claims

1. A repair structure for a steel frame having upright supports and a horizontal frame installed between the supports, mounting brackets extending in the upright direction of the support columns and attached to the support columns; Two or more new screen materials are provided between the mounting brackets. A steel frame repair structure characterized by:

2. A repair structure for a steel frame having upright supports and a horizontal frame installed between the supports, a mounting bracket extending in the vertical direction of the support column and installed between the horizontal frames; Two or more new screen materials are provided between the mounting brackets. A steel frame repair structure characterized by:

3. The mounting bracket is attached to the support pole via a bolt, The new screen material is attached to the mounting bracket via bolts. The repair structure for a steel frame according to claim 1,

4. The mounting bracket is attached to the horizontal frame via a bolt, The new screen material is attached to the mounting bracket via bolts. The repair structure for a steel frame according to claim 2, characterized in that:

5. The mounting bracket has a flange mounting portion that is inserted into the inside of the flange of the H-shaped steel support column. The repair structure for a steel frame according to claim 1,

6. The mounting bracket has a cross-sectional shape in the erection direction of the support pole that is folded back from the flange mounting portion to the outside of the flange and has a fixing portion to which the new screen material is attached. The repair structure for a steel frame according to claim 4, characterized in that:

7. A method for repairing a steel frame having erected support columns and a horizontal frame installed between the support columns, comprising: a bracket mounting step of mounting brackets extending in the erection direction of the support poles to the support poles; and a screen mounting step of arranging two or more new screen materials side by side between the mounting brackets. A method for repairing a steel frame, characterized by:

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