Earthquake-resistant reinforcement method

Abstract

To make antiseismic reinforcement with existing walls in a steel frame structure where the existing walls are already provided.SOLUTION: A steel frame 3 with steel columns 1 and steel beams 2, and a reinforced concrete existing wall 4 located within the steel frame 3 are provided. The existing wall 4 is an existing non-structural wall 8 not coupled to the steel frame 3, and coupling means 10 is provided to couple the existing non-structural wall 8 to the steel frame 3.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a seismic reinforcement method for a steel frame structure having steel columns and steel beams. [Background technology]

[0002] In steel-framed structures that have steel columns and steel beams, it is considered to install earthquake-resistant components such as braces to reinforce the structure against earthquakes. However, due to restrictions on use in buildings and restrictions on installation space, it can be difficult to install earthquake-resistant components such as braces in steel-framed structures.

[0003] Therefore, conventionally, earthquake resistance reinforcement has been performed by providing concrete earthquake-resistant walls on steel frame structures (see, for example, Patent Documents 1 and 2).

[0004] In the structure described in Patent Document 1, a concrete earthquake-resistant wall is installed within a steel frame structure, with both left and right ends connected to the left and right steel columns and both up and down ends connected to the upper and lower steel beams. In this way, earthquake resistance is reinforced by newly constructing a concrete earthquake-resistant wall within the steel frame structure.

[0005] In the structure described in Patent Document 2, connecting stud bolts are provided on steel beams, and high-toughness FRC material is poured into the steel frame to form a concrete earthquake-resistant wall within the frame. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Japanese Patent Application Publication No. 2019-44498 [Patent Document 2] Patent No. 3648094 Summary of the Invention [Problem to be solved by the invention]

[0007] The methods described in Patent Documents 1 and 2 can both be applied when constructing a new concrete earthquake-resistant wall within a steel frame structure. However, Patent Documents 1 and 2 do not describe how to deal with existing walls, such as non-structural walls, when they are already installed within the frame, and therefore cannot be applied in such cases.

[0008] In view of this situation, the main object of the present invention is to provide an earthquake-resistant reinforcement method that can perform earthquake-resistant reinforcement using existing walls such as non-structural walls when they are already installed within a steel-framed structure. [Means for solving the problem]

[0009] A first characteristic configuration of the present invention is a steel frame structure having steel columns and steel beams, and an existing wall made of reinforced concrete placed within the steel frame structure. The existing wall is an existing miscellaneous wall that is not connected to the steel frame structure, A connecting means is provided to connect the existing non-structural wall to the steel frame. 、 The connecting means includes first connecting means for connecting the left and right steel columns to the existing non-structural wall, and second connecting means for connecting the upper steel beam to the existing non-structural wall, A miscellaneous wall foundation connecting means is provided to connect the lower foundation and the existing miscellaneous wall. It's at the point.

[0010] According to this configuration, an existing reinforced concrete wall is placed within a steel frame, but by connecting the existing wall to the steel frame using the connecting means, it is possible to perform seismic reinforcement while using the existing wall as a seismic element.As a result, even if an existing wall is already installed within a steel frame, it is possible to perform seismic reinforcement while effectively utilizing the existing wall with a simple configuration of connecting the existing wall to the steel frame.

[0011] The second characteristic configuration of the present invention is that the connecting means connects the steel frame structure and the existing non-standard wall by fastening the existing non-standard wall with bolts in a state where the existing non-standard wall is sandwiched between a pair of first plate bodies connected to the steel frame structure.

[0012] According to this configuration, the connecting means fastens the existing miscellaneous wall with bolts in a state where it is sandwiched between a pair of first plate bodies connected to the steel frame structure, so that the steel frame structure and the existing miscellaneous wall can be connected easily and appropriately, and the existing miscellaneous wall can function effectively as an earthquake-resistant wall.

[0013] A third characteristic configuration of the present invention is that a filler material is filled between the first plate body and the existing miscellaneous wall, and the first plate body is fixed to the existing miscellaneous wall via the filler material.

[0014] According to this configuration, even if there is a misalignment between the steel columns or steel beams in the steel frame and the existing non-structural wall, the misalignment can be absorbed by filling the gap between the first plate body and the existing non-structural wall with filler. This allows the existing non-structural wall to be properly sandwiched between the pair of first plate bodies connected to the steel frame, and the connection by the pair of first plate bodies can be properly performed.

[0015] A fourth characteristic configuration of the present invention is as follows: a steel frame structure having steel columns and steel beams; and an existing wall made of reinforced concrete placed within the steel frame structure. The existing wall is an existing miscellaneous wall that is not connected to the steel frame structure, A connecting means is provided to connect the existing non-structural wall to the steel frame structure, The present invention is characterized in that it is provided with a wall-to-foundation connecting means which has a pair of second plate bodies arranged in a sandwiched state between the existing wall and the foundation, and which connects the existing wall and the foundation.

[0016] According to this configuration, an existing reinforced concrete wall is placed within a steel frame, but by connecting the existing wall to the steel frame using the connecting means, it is possible to perform seismic reinforcement while using the existing wall as a seismic element.As a result, even if an existing wall is already installed within a steel frame, it is possible to perform seismic reinforcement while effectively utilizing the existing wall with a simple configuration of connecting the existing wall to the steel frame. Furthermore, According to this configuration, the non-structural wall foundation connecting means sandwiches the existing non-structural wall and the foundation between a pair of second plate bodies, so that the foundation and the existing non-structural wall can be connected easily and appropriately, and the existing non-structural wall can function effectively as a seismic wall.

[0017] A fifth characteristic configuration of the present invention is that a filler material is filled between the second plate body and the existing miscellaneous wall, and the second plate body is fixed to the existing miscellaneous wall via the filler material.

[0018] With this configuration, even if there is a misalignment between the foundation and the existing miscellaneous wall, the misalignment can be absorbed by filling the gap between the second plate body and the existing miscellaneous wall with filler. This allows the existing miscellaneous wall and the foundation to be properly sandwiched between the pair of second plate bodies, allowing for proper connection by the pair of second plate bodies.

[0019] A sixth characteristic configuration of the present invention is that a filler is filled between the second plate body and the existing miscellaneous wall so that the width of the existing miscellaneous wall and the thickness of the filler is the same as or approximately the same as the width of the foundation, The second plate body is formed in a straight line extending from the foundation to the existing non-structural wall in the vertical direction.

[0020] According to this configuration, the filler is filled so that the combined width of the existing miscellaneous wall and the thickness of the filler is the same or approximately the same as the width of the foundation, so even if the second plate body is formed in a straight line spanning the foundation and the existing miscellaneous wall in the vertical direction, the pair of second plate bodies can properly sandwich the existing miscellaneous wall and the foundation. This simplifies the manufacture of the second plate body and, for example, makes it possible to avoid bending stress acting on the second plate body by not providing a bending portion in the second plate body. [Brief explanation of the drawings]

[0021] [Figure 1] Front view of the steel frame structure [Figure 2] Front view of the steel frame structure after seismic reinforcement [Figure 3] Front view of the steel frame structure perpendicular to Figure 2 after seismic reinforcement [Figure 4] Cross section taken along line IV-IV in Figure 3 [Figure 5]Diagram showing the connection structure between steel beams and existing non-structural walls [Figure 6] Diagram showing the connection structure between the foundation and the existing non-structural wall [Figure 7] Cross section taken along line VII-VII in Figure 3 [Figure 8] Cross section taken along line VIII-VIII in Figure 2 DETAILED DESCRIPTION OF THE INVENTION

[0022] An embodiment of the earthquake-resistant reinforcement method according to the present invention will be described with reference to the drawings. This earthquake-resistant reinforcement method is a method for performing earthquake-resistant reinforcement on a building that has a steel frame structure 3 having steel columns 1 and steel beams 2, and an existing reinforced concrete wall 4 placed within the steel frame structure 3, as shown in Figure 1.

[0023] As shown in FIG. 1, the foundation 5 of this building is provided with footings 6 and foundation beams 7 that connect the footings 6 together. A plurality of steel columns 1 are provided at predetermined intervals and erected on the footings 6 of the foundation 5. The steel columns 1 are made of, for example, steel pipes with a circular cross section. The steel beams 2 are erected in a state that connects the steel columns 1 that are spaced at predetermined intervals, and are made of H-shaped steel having an upper flange 2a, a lower flange 2b, and a web 2c that connects the upper and lower flanges 2a, 2b.

[0024] The existing walls 4 are formed in a rectangular or approximately rectangular shape and are located between the foundation beams 7 and the steel beams 2 in the vertical direction and between the steel columns 1 spaced apart in the horizontal direction, and are provided as existing miscellaneous walls 8 that are not sufficiently connected to the steel columns 1 and steel beams 2 in the steel frame 3. The existing miscellaneous walls 8 are not sufficiently connected not only to the steel columns 1 and steel beams 2 in the steel frame 3, but also to the foundation beams 7 in the foundation 5. As a result, the existing miscellaneous walls 8 are provided in a state where they are only positioned relative to the steel frame 3 and foundation 5 under normal circumstances, but do not function as earthquake-resistant walls during earthquakes, etc.

[0025] Therefore, in the earthquake-resistant reinforcement method, as shown in Figures 2 and 3, a connecting means 10 is provided to connect the existing non-structural wall 8 to the steel frame 3, and by connecting the existing non-structural wall 8 to the steel frame 3 with the connecting means 10, earthquake-resistant reinforcement is performed while using the existing non-structural wall 8 as an earthquake-resistant element. Figure 2 shows a front view of the frame surface in Figure 1, showing the state after earthquake-resistant reinforcement. Figure 3 shows a front view of the frame surface perpendicular to Figure 2, at the position of the steel column 1 on the left side of Figure 2.

[0026] As shown in Figures 2 and 3, the connecting means 10 includes a first connecting means 11 that connects the steel column 1 to the existing non-structural wall 8, and a second connecting means 21 that connects the steel beam 2 to the existing non-structural wall 8. In this seismic reinforcement method, in addition to the connecting means 10, a non-structural wall-foundation connecting means 31 that connects the existing non-structural wall 8 to the foundation 5 is provided. Furthermore, in order to connect the steel column 1 to the existing non-structural wall 8, in addition to the first connecting means 11, the seismic reinforcement method also includes a third connecting means 41 that connects two existing non-structural walls 8 that are perpendicular to the steel column 1, as shown in Figure 7, and a fourth connecting means 52 that connects the steel column 1, the existing non-structural wall 8, and additional steel material 51, as shown in Figure 8. Each of the coupling means will be described below.

[0027] (first coupling means) 2 and 3, the first connecting means 11 connects the steel column 1 and the existing non-continuous wall 8 with a plate-shaped non-continuous wall column plate body 12 (corresponding to the first plate body) that spans between the steel column 1 and the existing non-continuous wall 8. The non-continuous wall column plate body 12 has a length that spans the entire length or approximately the entire length of the steel column 1 and the existing non-continuous wall 8 in the vertical direction, excluding the joint portion between the steel column 1 and the steel beam 2.

[0028] As shown in Figure 4, a pair of plate bodies 12 for non-standard wall columns are provided at intervals in the thickness direction of the existing non-standard wall 8, and the pair of plate bodies 12 for non-standard wall columns connected to the steel column 1 are connected in a state in which the existing non-standard wall 8 is sandwiched between them, thereby joining the steel column 1 and the existing non-standard wall 8.

[0029] As shown in FIG. 4 , the non-standard wall column plate body 12 is L-shaped in plan view and has a curved column-side abutment portion 12a that abuts against the outer periphery 1a of the circular steel column 1, and a flat non-standard wall-side abutment portion 12b that abuts against the outer surface 8a of the existing non-standard wall 8. The non-standard wall column plate body 12 is provided with rib portions 12c that extend from the column-side abutment portion 12a and the non-standard wall-side abutment portion 12b in a direction perpendicular to the non-standard wall column plate body 12. The rib portions 12c can be formed, for example, by a plate body separate from the non-standard wall column plate body 12. The rib portions 12c are connected to the non-standard wall column plate body 12 by welding or the like so that they extend perpendicularly from the column-side abutment portion 12a and the non-standard wall-side abutment portion 12b, and are provided integrally as the non-standard wall column plate body 12.

[0030] When connecting a steel column 1 and an existing miscellaneous wall 8 with a miscellaneous wall column plate body 12, as shown in Figure 4, the column-side abutment portion 12a of each of the pair of miscellaneous wall column plate bodies 12 is abutted against the outer periphery 1a of the steel column 1, and the miscellaneous wall-side abutment portion 12b of each of the pair of miscellaneous wall column plate bodies 12 is abutted against the outer surface 8a of the existing miscellaneous wall 8, thereby positioning the pair of miscellaneous wall column plate bodies 12 so that they sandwich the existing miscellaneous wall 8. With the pair of miscellaneous wall column plate bodies 12 positioned in this way, the steel column 1 and the pair of miscellaneous wall column plate bodies 12 are connected, and the existing wall 8 and the pair of miscellaneous wall column plate bodies 12 are connected.

[0031] The steel column 1 and the pair of miscellaneous wall column plate bodies 12 are connected using one-sided bolts 13. The one-sided bolts 13 are inserted into the insertion holes of the miscellaneous wall column plate body 12 and the insertion holes of the steel column 1, and nuts 14 are fastened from the outside of the miscellaneous wall column plate body 12, thereby separately fixing the pair of miscellaneous wall column plate bodies 12 to the steel column 1.

[0032] The existing miscellaneous wall 8 is connected to the pair of miscellaneous wall column plate bodies 12 by passing a through bolt 15 through the insertion hole of the miscellaneous wall column plate body 12 and the insertion hole of the existing miscellaneous wall 8 and fastening it with a nut 16, thereby fixing the pair of miscellaneous wall column plate bodies 12 to the existing miscellaneous wall 8 in a state where the existing miscellaneous wall 8 is sandwiched between the pair of miscellaneous wall column plate bodies 12. Incidentally, the gap between the inner wall portion of the insertion hole of the existing miscellaneous wall 8 and the outer periphery of the through bolt 15 is filled with a filler such as grout.

[0033] Regarding the work of connecting the steel column 1 to a pair of non-standard wall column plate bodies 12, and the work of connecting the existing non-standard wall 8 to a pair of non-standard wall column plate bodies 12, both work can be performed in parallel, but the two connecting work can also be performed in order, with one connecting work being performed first and then the other connecting work being performed later. How the two connecting work is performed can be changed as appropriate depending on various conditions such as the construction situation.

[0034] (Second coupling means) 2 and 3, the second connecting means 21 connects the steel beam 2 to the existing non-structural wall 8 using a plate-shaped non-structural wall beam plate body 22 (corresponding to the first plate body) that spans between the steel beam 2 and the existing non-structural wall 8. The non-structural wall beam plate body 22 has a length that spans the entire length or nearly the entire length of the steel beam 2 in the longitudinal direction of the steel beam 2, excluding the joint between the steel column 1 and the steel beam 2, and is divided into two at the center of the steel beam 2 in the longitudinal direction.

[0035] As shown in FIG. 5 , a pair of non-removable wall beam plate bodies 22 are provided at a distance in the thickness direction of the existing non-removable wall 8, and are connected to the steel beam 2 so that the pair of non-removable wall beam plate bodies 22 sandwich the existing non-removable wall 8, thereby joining the steel beam 2 and the existing non-removable wall 8. The pair of non-removable wall beam plate bodies 22 do not directly abut the outer surface 8a of the existing non-removal wall 8, but are arranged at a distance from the outer surface 8a of the existing non-removal wall 8, and a filler 23 such as non-shrinkage mortar is filled between the non-removable wall beam plate bodies 22 and the existing non-removal wall 8. As a result, the pair of non-removable wall beam plate bodies 22 are provided in a state where they sandwich the existing non-removable wall 8, including the filler 23, by fastening the through bolts 29 and nuts 30. The filler 23 such as non-shrinkage mortar can integrate the filler 23 and the through bolts 29, preventing bending stress from being applied to the through bolts 29.

[0036] As shown in Figure 5, the miscellaneous wall beam plate body 22 comprises an L-shaped beam-side plate body 24 having a web abutment portion 24a that abuts against the web 2c of the steel beam 2 and a lower flange abutment portion 24b that abuts against the lower flange 2b, and a linear miscellaneous wall-side plate body 25 that extends in the vertical direction (parallel to the surface direction of the existing miscellaneous wall 8) while facing the outer surface portion 8a of the existing miscellaneous wall 8. The beam-side plate body 24 and the miscellaneous wall-side plate body 25 are connected by welding or the like and are provided integrally as the miscellaneous wall beam plate body 22. The beam-side plate body 24 is provided with an inclined rib portion 26 that extends in a direction perpendicular to the beam-side plate body 24, and this rib portion 26 is also connected to the beam-side plate body 24 by welding or the like and is provided integrally as the miscellaneous wall beam plate body 22.

[0037] 5, when joining a steel beam 2 to an existing miscellaneous wall 8 with the miscellaneous wall beam plate bodies 22, the web abutment portion 24a of each of the pair of beam-side plate bodies 24 is abutted against the web 2c of the steel beam 2 and the lower flange abutment portion 24b is abutted against the lower flange 2b, thereby sandwiching the steel beam 2 between the pair of beam-side plate bodies 24, and each of the pair of miscellaneous wall-side plate bodies 25 is disposed at a distance from each other and facing the outer surface portion 8a of the existing miscellaneous wall 8, thereby positioning the pair of miscellaneous wall beam plate bodies 22. With the pair of miscellaneous wall beam plate bodies 22 positioned in this way, the steel beam 2 and the pair of miscellaneous wall beam plate bodies 22 are connected, and the existing wall 8 and the pair of miscellaneous wall beam plate bodies 22 are connected.

[0038] To connect the steel beam 2 to a pair of miscellaneous wall beam plate bodies 22, high-tension bolts 27 are inserted into the insertion holes of the beam side plate body 24 and the insertion holes of the steel beam 2 and fastened with nuts 28, thereby fixing the pair of miscellaneous wall beam plate bodies 22 to the steel beam 2 in a state where the steel beam 2 is sandwiched between the pair of miscellaneous wall beam plate bodies 22.

[0039] Regarding the connection between the existing miscellaneous wall 8 and the pair of miscellaneous wall beam plate bodies 22, for example, in a state in which a through-bolt 29 is inserted into the insertion hole of the miscellaneous wall side plate body 25 and the insertion hole of the existing miscellaneous wall 8 and temporarily fastened with a nut 30, a filler 23 such as non-shrink mortar is filled between the miscellaneous wall side plate body 25 and the existing miscellaneous wall 8, and then the through-bolt 29 is tightened with the nut 30 to permanently fasten, thereby fixing the pair of miscellaneous wall beam plate bodies 22 to the existing miscellaneous wall 8 in a state in which the existing miscellaneous wall 8, including the filler 23, is sandwiched between the pair of miscellaneous wall side plate bodies 25. Incidentally, the order in which the work of inserting the through-bolt 29, the work of filling the filler 23, and the work of tightening the through-bolt 29 with the nut 30 are performed can be changed as appropriate depending on the construction situation, etc.

[0040] In the plate body 22 for the miscellaneous wall beam, the miscellaneous wall-side plate body 25 is arranged so as to extend downward from the outer end of the lower flange abutment portion 24b of the beam-side plate body 24. Therefore, as shown in Fig. 5, even if the existing miscellaneous wall 8 is arranged in a state where it is misaligned with the steel beam 2 in the left-right direction of the steel beam 2 (a state where the center portion of the steel beam 2 and the center portion of the existing miscellaneous wall 8 do not match), by changing the thickness of the filler material 23 on the right and left sides in the left-right direction, the misalignment can be absorbed, and the center portion of the structural part combining the existing miscellaneous wall 8 and the filler material 23 can be aligned with the center portion of the steel beam 2.

[0041] In the example shown in Figure 5, the existing miscellaneous wall 8 is misaligned to the right relative to the steel beam 2, so the thickness of the filler material 23 is made thicker on the left side than on the right side. As a result, even if the existing miscellaneous wall 8 is arranged in a state where it is misaligned relative to the steel beam 2 in the left-right direction of the steel beam 2, the structural part consisting of the existing miscellaneous wall 8 and the filler material 23 can be properly joined to the steel beam 2 while remaining aligned.

[0042] Regarding the work of connecting the steel beam 2 to a pair of miscellaneous wall beam plate bodies 22, and the work of connecting the existing miscellaneous wall 8 to a pair of miscellaneous wall beam plate bodies 22, both work can be performed in parallel, but the two connecting work can also be performed in order, with one connecting work being performed first and then the other connecting work being performed later. How the two connecting work is performed can be changed as appropriate depending on various conditions such as the construction situation.

[0043] (Miscellaneous wall foundation connection means) In order to use the existing non-structural wall 8 as an earthquake-resistant element, as shown in Figures 2 and 3, not only is the steel frame structure 3 and the existing non-structural wall 8 connected by connecting means 10, but a non-structural wall foundation connecting means 31 is also provided to connect the existing non-structural wall 8 to the foundation 5.

[0044] The non-slip wall foundation connecting means 31 connects the steel beam 2 to the existing non-slip wall 8 using a plate-shaped non-slip wall foundation plate body 32 (corresponding to a second plate body) that spans the existing non-slip wall 8 and the foundation beam 7 of the foundation 5. The non-slip wall foundation plate body 32 has a length that spans the entire length or nearly the entire length of the foundation beam 7 in the longitudinal direction of the foundation beam 7, excluding the joint between the steel column 1 and the foundation 5, and is divided into multiple pieces in the longitudinal direction of the foundation beam 7.

[0045] As shown in Fig. 6, the non-standard wall foundation plate bodies 32 are formed in a straight line extending in the vertical direction between the foundation beams 7 of the foundation 5 and the existing non-standard wall 8, and a pair of non-standard wall foundation plate bodies 32 are provided at an interval in the thickness direction of the existing non-standard wall 8. The pair of non-standard wall foundation plate bodies 32 connected to the foundation beams 7 of the foundation 5 connect the existing non-standard wall 8 in a sandwiched state, thereby joining the foundation beams 7 of the foundation 5 and the existing non-standard wall 8.

[0046] When joining a foundation beam 7 and an existing non-standard wall 8 with non-standard wall foundation plate bodies 32, as shown in Figure 6, the lower portions of the pair of non-standard wall foundation plate bodies 32 are abutted against the outer surface 7a of the foundation beam 7, the pair of non-standard wall foundation plate bodies 32 sandwich the foundation beam 7, and the pair of non-standard wall foundation plate bodies 32 are arranged at a distance from each other and facing the outer surface 8a of the existing non-standard wall 8, thereby positioning the pair of non-standard wall foundation plate bodies 32. With the pair of non-standard wall foundation plate bodies 32 positioned in this way, the foundation beam 7 and the pair of non-standard wall foundation plate bodies 32 are connected, and the existing wall 8 and the pair of non-standard wall foundation plate bodies 32 are connected.

[0047] The foundation beam 7 and the pair of miscellaneous wall foundation plate bodies 32 are connected by inserting adhesive anchors 33 into the insertion holes of the miscellaneous wall foundation plate bodies 32 and the insertion holes of the foundation beam 7 and fastening them with nuts 35 via plate bodies 34, thereby fixing the pair of miscellaneous wall foundation plate bodies 32 to the foundation beam 7 in a state where the foundation beam 7 is sandwiched between the pair of miscellaneous wall foundation plate bodies 32. Incidentally, the placement positions of the adhesive anchors 33 are set at positions away from the placement positions of the reinforcing bars 71 in the foundation beam 7 (which can be measured, for example, by inspection, etc.).

[0048] Regarding the connection between the existing miscellaneous wall 8 and a pair of miscellaneous wall foundation plate bodies 32, for example, a through bolt 37 is inserted into the insertion hole of the miscellaneous wall foundation plate body 32 and the insertion hole of the existing miscellaneous wall 8 and temporarily fixed with a nut 38, and then a filler 36 such as non-shrink mortar is filled between the miscellaneous wall foundation plate body 32 and the existing miscellaneous wall 8, and then the through bolt 37 is tightened with the nut 38 to permanently fix the existing miscellaneous wall 8, with the pair of miscellaneous wall foundation plate bodies 32 sandwiching the existing miscellaneous wall 8, including the filler 36, between them.

[0049] As a result, a pair of non-reinforced wall foundation plate bodies 32 are provided in a state in which they sandwich the existing non-reinforced wall 8, including the filler material 36, by fastening the through bolts 37 and nuts 38. The filler material 36, such as non-shrinkage mortar, can be used to integrate the filler material 36 with the through bolts 37, preventing bending stress from being applied to the through bolts 37. Incidentally, the order in which the work of inserting the through bolts 37, the work of filling the filler material 36, and the work of fastening the through bolts 37 with nuts 38 can be changed as appropriate depending on the construction situation, etc.

[0050] Here, the placement position of the through bolt 37 is set to be above the wall end reinforcement 81 in the existing non-structural wall 8 (toward the interior of the existing non-structural wall 8). The placement position of the wall end reinforcement 81 can be determined by actual measurement through exploration.

[0051] As shown in Figure 6, even if the thicknesses of the existing miscellaneous wall 8 and the foundation beam 7 are different, by filling the gap between the miscellaneous wall foundation plate body 32 and the existing miscellaneous wall 8 with a filler 36 such as non-shrink mortar, the combined width of the existing miscellaneous wall 8 and the filler 36 can be made the same or approximately the same as the width of the foundation beam 7. As a result, even if the miscellaneous wall foundation plate body 32 is a linear plate body extending in the vertical direction, it can be installed so that it abuts against the outer surface 7a of the foundation beam 7 and also against the outer surface of the combined structural part of the existing miscellaneous wall 8 and the filler 36, so that it abuts across the combined structural part of the foundation beam 7 and the existing miscellaneous wall 8 and the filler 36.

[0052] As shown in Figure 6, even if the existing miscellaneous wall 8 is arranged in a state where it is misaligned relative to the foundation beam 7 in the left-right direction of the foundation beam 7 (the central part of the foundation beam 7 does not match the central part of the existing miscellaneous wall 8), the misalignment can be absorbed by changing the thickness of the filler material 36 on the right and left sides in the left-right direction, and the central part of the structural part consisting of the existing miscellaneous wall 8 and the filler material 36 can be aligned with the central part of the foundation beam 7.

[0053] In the example shown in Figure 6, the existing miscellaneous wall 8 is misaligned to the right relative to the foundation beam 7, so the thickness of the filler material 36 is made thicker on the left side than on the right side. As a result, even if the existing miscellaneous wall 8 is arranged in a state where it is misaligned relative to the foundation beam 7 in the left-right direction of the foundation beam 7, the structural part consisting of the existing miscellaneous wall 8 and the filler material 36 can be properly joined to the foundation beam 7 while remaining aligned.

[0054] Regarding the work of connecting the foundation beam 7 to a pair of non-reinforced wall foundation plate bodies 32, and the work of connecting the existing non-reinforced wall 8 to a pair of non-reinforced wall foundation plate bodies 32, both work can be performed in parallel, but the two connecting work can also be performed in order, with one connecting work being performed first and then the other connecting work being performed later. How the two connecting work is performed can be changed as appropriate depending on various conditions such as the construction situation.

[0055] (Third coupling means) In this embodiment, as shown in Figures 2 and 3, the steel frame structure 3 shown in Figure 2 and the steel frame structure 3 shown in Figure 3 are arranged so as to be perpendicular to each other. As a result, as shown in Figure 7, which shows a cross section taken along line VII-VII in Figure 3, there is a location where two existing non-structural walls 8 are arranged perpendicular to the steel column 1, and at this location, a third connecting means 41 is provided to connect the two existing non-structural walls 8 perpendicular to the steel column 1.

[0056] The third connecting means 41 is a modified example of the first connecting means 11 shown in Figure 4, and as shown in Figure 7, it is provided with two plate bodies 12 for miscellaneous wall columns in the first connecting means 11, and in addition, it is provided with a second plate body 42 for miscellaneous wall columns that connects two existing miscellaneous walls 8 that are perpendicular to each other and a steel column 1.

[0057] The second miscellaneous wall column plate body 42 has a planar first miscellaneous wall-side abutment portion 42a that abuts against the outer surface 8a of the existing miscellaneous wall 8, a curved column-side abutment portion 42b that abuts against the outer periphery 1a of the circular steel column 1, and a planar second miscellaneous wall-side abutment portion 42c that abuts against the outer surface 8a of the existing miscellaneous wall 8. The second miscellaneous wall column plate body 42 is provided with the first miscellaneous wall-side abutment portion 42a and the second miscellaneous wall-side abutment portion 42c in an orthogonal orientation, with the column-side abutment portion 42b as the center and the first miscellaneous wall-side abutment portion 42a and the second miscellaneous wall-side abutment portion 42c extending in opposite directions. The second miscellaneous wall column plate body 42 is provided with a rib portion 42d that extends in a direction perpendicular thereto.

[0058] When connecting two existing miscellaneous walls 8 that are perpendicular to a steel column 1 using a miscellaneous wall column plate body 12 and a second miscellaneous wall column plate body 42, as shown in Figure 7, one of the two miscellaneous wall column plate bodies 12 is positioned by abutting the column-side abutment portion 12a against the outer periphery 1a of the steel column 1 and abutting the miscellaneous wall-side abutment portion 12b against the outer surface 8a of one existing miscellaneous wall 8 (the existing miscellaneous wall 8 arranged on the left side of the steel column 1 in Figure 7).The other miscellaneous wall column plate body 12 is also positioned by abutting the column-side abutment portion 12a against the outer periphery 1a of the steel column 1 and abutting the miscellaneous wall-side abutment portion 12b against the outer surface 8a of the other existing miscellaneous wall 8 (the existing miscellaneous wall 8 arranged above the steel column 1 in Figure 7). The second miscellaneous wall column plate body 42 is positioned by abutting the first miscellaneous wall side abutment portion 42a against the outer surface 8a of one existing miscellaneous wall 8 (the existing miscellaneous wall 8 arranged on the left side of the steel column 1 in Figure 7), the column side abutment portion 42b against the outer periphery 1a of the steel column 1, and the second miscellaneous wall side abutment portion 42c against the outer surface 8a of the other existing miscellaneous wall 8 (the existing miscellaneous wall 8 arranged above the steel column 1 in Figure 7).

[0059] By positioning the two miscellaneous wall column plate bodies 12 and the second miscellaneous wall column plate body 42, one of the miscellaneous wall column plate bodies 12 and the second miscellaneous wall column plate body 42 can sandwich one of the existing miscellaneous walls 8 (the existing miscellaneous wall 8 arranged on the left side of the steel column 1 in Figure 7), and the other miscellaneous wall column plate body 12 and the second miscellaneous wall column plate body 42 can sandwich one of the existing miscellaneous walls 8 (the existing miscellaneous wall 8 arranged above the steel column 1 in Figure 7).

[0060] In this way, with the two miscellaneous wall column plate bodies 12 and the second miscellaneous wall column plate body 42 positioned, the two miscellaneous wall column plate bodies 12 and the second miscellaneous wall column plate body 42 are connected to the steel column 1, and the miscellaneous wall column plate body 12 and the second miscellaneous wall column plate body 42 are connected to two existing miscellaneous walls 8 that are perpendicular to each other.

[0061] The two miscellaneous wall column plate bodies 12 and the second miscellaneous wall column plate body 42 are connected to the steel frame column 1 using one-sided bolts 13, similar to the connection between the steel frame column 1 and the miscellaneous wall column plate body 12 shown in Figure 4. When connecting the miscellaneous wall column plate bodies 12, the one-sided bolts 13 are inserted into the insertion holes of the miscellaneous wall column plate bodies 12 and the insertion holes of the steel frame column 1, and nuts 14 are fastened from the outside of the miscellaneous wall column plate body 12, thereby fixing the miscellaneous wall column plate body 12 to the steel frame column 1. When connecting the second miscellaneous wall column plate body 42, the one-sided bolts 13 are inserted into the insertion holes of the second miscellaneous wall column plate body 42 and the insertion holes of the steel frame column 1, and nuts 14 are fastened from the outside of the miscellaneous wall column plate body 12, thereby fixing the second miscellaneous wall column plate body 42 to the steel frame column 1.

[0062] Regarding the connection of the plate body 12 for the miscellaneous wall column and the plate body 42 for the second miscellaneous wall column to two existing miscellaneous walls 8 that intersect at right angles, both of the two existing miscellaneous walls 8 that intersect at right angles are connected in the same way, so only the connection to one of the existing miscellaneous walls 8 (the existing miscellaneous wall 8 arranged on the left side of the steel column 1 in Figure 7) will be explained, and the connection to the other existing miscellaneous wall 8 (the existing miscellaneous wall 8 arranged above the steel column 1 in Figure 7) will be omitted.

[0063] As shown in Figure 7, the existing miscellaneous wall 8 is sandwiched between the miscellaneous wall-side abutment portion 12b of the miscellaneous wall column plate body 12 and the first miscellaneous wall-side abutment portion 42a of the second miscellaneous wall column plate body 42, and the through-hole of the miscellaneous wall column plate body 12, and the through-hole of the second miscellaneous wall column plate body 42, and by passing a through-bolt 43 through the insertion hole of the miscellaneous wall column plate body 12, the insertion hole of the second miscellaneous wall column plate body 42, and the insertion hole of the existing miscellaneous wall 8 and fastening it with a nut 44, the miscellaneous wall column plate body 12 and the second miscellaneous wall column plate body 42 are fixed to the existing miscellaneous wall 8 in a state where the existing miscellaneous wall 8 is sandwiched between them. Incidentally, the gap between the inner wall portion of the insertion hole of the existing miscellaneous wall 8 and the outer periphery of the through-bolt 43 is filled with a filler material such as grout.

[0064] (Fourth coupling means) As shown on the right side of Figure 2, in areas where there are no existing non-structural walls 8, it is possible to perform seismic reinforcement by adding steel members 51 that are connected to the upper end or middle part of the steel column 1 in the vertical direction. Therefore, fourth connecting means 52 is provided to connect the steel column 1 and the additional steel members 51 using the first connecting means 11 that connects the steel column 1 and the existing non-structural wall 8.

[0065] As shown in Fig. 8, which shows a cross section taken along line VIII-VIII in Fig. 2, the fourth connecting means 52 connects the steel column 1 and the additional steel material 51 by using the non-reinforced concrete wall column plate body 12 in the first connecting means 11. In other words, one of the pair of non-reinforced concrete wall column plate bodies 12 is changed to a third non-reinforced concrete wall column plate body 53.

[0066] As shown in Fig. 8, the third miscellaneous wall column plate body 53 differs from the miscellaneous wall column plate body 12 shown in Fig. 4 only in that the column-side abutment portion 53a is extended circumferentially around the steel column 1, but otherwise has a similar configuration. The third miscellaneous wall column plate body 53 is equipped with a curved column-side abutment portion 53a that abuts against the outer periphery 1a of the circular steel column 1, a flat miscellaneous wall-side abutment portion 53b that abuts against the outer surface 8a of the existing miscellaneous wall 8, and a rib portion 53c that extends in a direction perpendicular to the third miscellaneous wall column plate body 53. The column-side abutment portion 53a has a length that is less than half the total length of the outer periphery 1a of the steel column 1, and in this embodiment, for example, is about half the total length of the outer periphery 1a of the steel column 1.

[0067] As shown in Fig. 8, the third miscellaneous wall column plate body 53 is provided with a connecting plate portion 53d to connect additional steel frame material 51. The connecting plate portion 53d is, for example, formed of a plate body separate from the third miscellaneous wall column plate body 53, and is provided integrally with the third miscellaneous wall column plate body 53 by connecting the plate body to the third miscellaneous wall column plate body 53 by welding or the like.

[0068] 8, two connecting plate portions 53d are provided. Of the two connecting plate portions 53d, one connecting plate portion 53d is provided in an orientation extending in the opposite direction from the existing non-structural wall 8, and the other connecting plate portion 53d is provided in an orientation extending in a direction perpendicular to the existing non-structural wall 8.

[0069] As shown in Figures 2 and 8, the additional steel frame 51 is made of an H-shaped steel having an upper flange 51a, a lower flange 51b, and a web 51c connecting the upper and lower flanges 51a, 51b. In the additional steel frame 51, the joining portion 51d for the joining plate portion 53d is formed by cutting out the upper and lower flanges 51a, 51b, as shown in Figure 8. The joining portion 51d of the additional steel frame 51 is joined to the third miscellaneous wall column plate body 53 by abutting the web 51c against the joining plate portion 53d and fastening bolts 54 and nuts 55.

[0070] When connecting a steel column 1, an existing miscellaneous wall 8, and additional steel members 51 using the miscellaneous wall column plate body 12 and the third miscellaneous wall column plate body 53, the miscellaneous wall column plate body 12 is positioned by abutting the column-side abutting portion 12a against the outer periphery 1a of the steel column 1 and abutting the miscellaneous wall-side abutting portion 12b against the outer surface 8a of the existing miscellaneous wall 8, as shown in Figure 8. The third miscellaneous wall column plate body 53 is also positioned by abutting the column-side abutting portion 53a against the outer periphery 1a of the steel column 1 and abutting the miscellaneous wall-side abutting portion 53b against the outer surface 8a of the existing miscellaneous wall 8.

[0071] By positioning the miscellaneous wall column plate body 12 and the third miscellaneous wall column plate body 53, the existing miscellaneous wall 8 can be sandwiched between the miscellaneous wall column plate body 12 and the third miscellaneous wall column plate body 53, as shown in Figure 8. With the miscellaneous wall column plate body 12 and the third miscellaneous wall column plate body 53 positioned in this way, the miscellaneous wall column plate body 12 and the third miscellaneous wall column plate body 53 are connected to the steel column 1, the miscellaneous wall column plate body 12 and the third miscellaneous wall column plate body 53 are connected to the existing miscellaneous wall 8, and additional steel members 51 are connected to the third miscellaneous wall column plate body 53 connected to the steel column 1 and the existing miscellaneous wall 8.

[0072] The connection of the miscellaneous wall column plate body 12 and the third miscellaneous wall column plate body 53 to the steel column 1 is both performed using one-sided bolts 13. The connection of the miscellaneous wall column plate body 12 is the same as that shown in Figure 4, so only the connection of the third miscellaneous wall column plate body 53 will be explained.

[0073] The column-side contact portion 53a of the third miscellaneous wall column plate body 53 also contacts the portion extending to the outer periphery 1a of the steel column 1 on the opposite side from the existing miscellaneous wall 8, providing three installation locations for the one-sided bolts 13. At each of the three installation locations, the one-sided bolts 13 are inserted through the insertion holes of the third miscellaneous wall column plate body 53 and the steel column 1, and nuts 14 are fastened from the outside of the third miscellaneous wall column plate body 53, thereby fixing the third miscellaneous wall column plate body 53 to the steel column 1.

[0074] Regarding the connection of the miscellaneous wall column plate body 12 and the third miscellaneous wall column plate body 53 to the existing miscellaneous wall 8, the existing miscellaneous wall 8 is sandwiched between the miscellaneous wall-side abutment portion 12b of the miscellaneous wall column plate body 12 and the miscellaneous wall-side abutment portion 53b of the third miscellaneous wall column plate body 53, so that by passing a through bolt 56 through the insertion hole of the miscellaneous wall column plate body 12, the insertion hole of the third miscellaneous wall column plate body 53, and the insertion hole of the existing miscellaneous wall 8 and fastening it with a nut 57, the miscellaneous wall column plate body 12 and the third miscellaneous wall column plate body 53 are fixed to the existing miscellaneous wall 8 in a state where the existing miscellaneous wall 8 is sandwiched between them. Incidentally, the gap between the inner wall portion of the insertion hole of the existing miscellaneous wall 8 and the outer periphery of the through bolt 56 is filled with a filler material such as grout.

[0075] Regarding the connection of the additional steel frame material 51 to the third miscellaneous wall column plate body 53 connected to the steel frame column 1 and the existing miscellaneous wall 8, the web 51c at the connection portion 51d of the additional steel frame material 51 is abutted against the connecting plate portion 53d, and the steel frame material 51 is fixed to the third miscellaneous wall column plate body 53 by inserting a bolt 54 through the insertion hole of the steel frame material 51 and the insertion hole of the connecting plate portion 53d and tightening it with a nut 55.

[0076] [Another embodiment] Other embodiments of the present invention will be described below. Note that the configurations of the embodiments described below are not limited to being applied independently, but can also be applied in combination with the configurations of other embodiments.

[0077] (1) In the above embodiment, when connecting the steel beam 2 to the existing miscellaneous wall 8 using the plate bodies 22 for the miscellaneous wall beam of the second connecting means 21, filler material 23 is filled between the pair of plate bodies 22 for the miscellaneous wall beam and the existing miscellaneous wall 8. However, by adjusting the spacing between the pair of plate bodies 22 for the miscellaneous wall beam to the thickness of the existing miscellaneous wall 8, the pair of plate bodies 22 for the miscellaneous wall beam can be directly abutted against the outer surface 8a of the existing miscellaneous wall 8 without filling the filler material, and the existing miscellaneous wall 8 can be directly sandwiched between the pair of plate bodies 22 for the miscellaneous wall beam.

[0078] (2) In the above embodiment, when connecting the foundation 5 and the existing miscellaneous wall 8 using the miscellaneous wall foundation plate bodies 32 of the miscellaneous wall foundation connecting means 31, filler 36 is filled between the pair of miscellaneous wall foundation plate bodies 32 and the existing miscellaneous wall 8. However, by adjusting the shape of the pair of miscellaneous wall foundation plate bodies 32 to the thickness and shape of the existing miscellaneous wall 8, the pair of miscellaneous wall foundation plate bodies 32 can be directly abutted against the outer surface 8a of the existing miscellaneous wall 8 without filling in filler, and the existing miscellaneous wall 8 can be directly sandwiched between the pair of miscellaneous wall foundation plate bodies 32.

[0079] (3) In the above embodiment, the steel frame structure 3 is exemplified as having steel columns 1 made of circular steel pipes and steel beams 2 made of H-shaped steel. However, the steel columns 1 and steel beams 2 can be made of steel materials of various shapes and are not limited to circular steel pipes and H-shaped steel. [Explanation of symbols]

[0080] 1 Steel column 2 Steel beams 3 Steel frame structure 4 Existing wall 5 Basics 8 Existing miscellaneous walls 10 Coupling means 12 Plate body for miscellaneous wall column (first plate body) 15 Through bolt 22 Plate body for miscellaneous wall beam (first plate body) 23 Filler (non-shrinkage mortar) 29 Through Bolt 31 Miscellaneous wall foundation connection means 32 Plate body for non-slip wall foundation (second plate body) 36 Filler (non-shrinkage mortar)

Claims

1. a steel frame structure having steel columns and steel beams; and an existing wall made of reinforced concrete placed within the steel frame structure. The existing wall is an existing miscellaneous wall that is not connected to the steel frame structure, A connecting means is provided to connect the existing non-structural wall to the steel frame structure, The connecting means includes first connecting means for connecting the left and right steel columns to the existing non-structural wall, and second connecting means for connecting the upper steel beam to the existing non-structural wall, An earthquake-resistant reinforcement method that includes a means of connecting the existing non-structural wall to the foundation below.

2. The earthquake-resistant reinforcement method described in claim 1, wherein the connecting means connects the steel frame structure and the existing wall by fastening the pair of first plate bodies connected to the steel frame structure with bolts while sandwiching the existing wall.

3. 3. The earthquake-resistant reinforcement method according to claim 2, wherein a filler material is filled between the first plate body and the existing wall, and the first plate body is fixed to the existing wall via the filler material.

4. A steel frame structure having steel columns and steel beams; and an existing wall made of reinforced concrete placed within the steel frame structure. The existing wall is an existing miscellaneous wall that is not connected to the steel frame structure, A connecting means is provided to connect the existing non-structural wall to the steel frame structure, An earthquake-resistant reinforcement method that has a pair of second plate bodies arranged in a sandwiched state between the existing miscellaneous wall and the foundation, and is equipped with a miscellaneous wall-foundation connecting means that connects the existing miscellaneous wall and the foundation.

5. 5. The earthquake-resistant reinforcement method according to claim 4, wherein a filler material is filled between the second plate body and the existing wall, and the second plate body is fixed to the existing wall via the filler material.

6. A filler is filled between the second plate body and the existing miscellaneous wall so that the combined width of the existing miscellaneous wall and the thickness of the filler is the same width as or approximately the same width as the foundation, The earthquake-resistant reinforcement method according to claim 5, wherein the second plate body is formed linearly in the vertical direction between the foundation and the existing non-structural wall.

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