JP6630520B2 - Seismic retrofit frame and seismic retrofit structure - Google Patents

Description

  The present invention relates to an earthquake-resistant reinforcement frame and an earthquake-resistant reinforcement structure.

  Patent Literature 1 discloses a technology related to a frame for seismic reinforcement to be incorporated in a frame of an existing building. In this prior art, studs and / or intermediate beams which can be divided in a frame surface are assembled in a lattice shape as a whole by bolting. Further, the intersection between the stud and the intermediate beam is made of a low-yield-point steel material having a lower yield point than that of the stud and the intermediate beam, and is bolted to a frame of an existing building.

JP 2000-240296 A

  Here, as a seismic reinforcement for suppressing the deformation of the frame, a method of installing a V-shaped or X-shaped steel frame brace on the frame is known. However, such V-shaped or X-shaped steel braces are obliquely arranged in a front view of the frame viewed from an out-of-plane direction, so that, for example, lighting or traffic from a window opening is blocked. Problem may occur.

  Further, in the technique of Patent Document 1, the intersection between the stud and the intermediate beam assembled as a whole in a lattice shape is made of a low yield point steel material or the like, so that the intersection yields during an earthquake and absorbs seismic energy. Exerts vibration damping effect. Therefore, it is essential to assemble the studs and the intermediate beams in a lattice shape. Therefore, the intermediate beams arranged horizontally in the vertical intermediate portion may cause problems such as, for example, lighting from the window opening and blocking of traffic.

  The seismic retrofit frame installed on the frame in this manner has no horizontal member such as an intermediate beam and an oblique member such as a steel brace arranged obliquely at an intermediate portion in the vertical direction in a front view. A structure is desirable.

  In view of the above fact, it is an object of the present invention to improve the seismic performance of a frame without arranging a horizontal member and an oblique member at an intermediate portion in a vertical direction when viewed from the front.

The first aspect is provided at an upper end portion of a frame, an upper steel member having both ends joined to the frame, and a lower steel member provided at a lower end portion of the frame and having both ends joined to the frame. A seismic strengthening frame comprising: one or a plurality of steel studs, both ends of which are joined to the upper steel member and the lower steel member, and which are provided along a vertical direction.

In the first aspect , between the upper steel member and the lower steel member of the aseismic reinforcement frame, only one or a plurality of steel frame studs having both ends joined along the vertical direction are arranged. That is, the horizontal member and the diagonal member are not arranged in the middle part in the vertical direction when viewed from the front.

  Then, the deformation of the frame during the earthquake is transmitted to one or more steel studs via the upper steel member and the lower steel member, and resists the shearing force.

  Therefore, the seismic performance of the frame in which the anti-seismic reinforcement frame is installed is improved without disposing the horizontal member and the oblique member in the middle part in the vertical direction when viewed from the front.

A second aspect is the earthquake-resistant reinforcing frame according to the first aspect , in which the steel stud has a structure divided at a central portion in a vertical direction and is pin-joined at the central portion.

In the second aspect , by adopting a structure divided at the center of the steel frame stud, for example, it becomes easy to transport the aseismic reinforcement frame during construction.

  In addition, the center portion of the steel stud that does not bear the bending moment of the seismic strengthening frame is pin-joined to simplify the fitting.

In a third aspect , the seismic retrofit frame according to the first aspect or the second aspect is installed on a frame, and a plurality of window openings arranged in a lateral direction are provided on a wall provided on the frame. The steel frame stud is a seismic reinforced structure arranged so as to overlap a portion between the window openings in a front view viewed from an out-of-plane direction.

In the third aspect , between the upper steel member and the lower steel member of the aseismic reinforcement frame, only one or a plurality of steel frame studs provided along the up and down direction, both ends of which are joined, are arranged. . That is, the horizontal member and the diagonal member are not arranged in the middle part in the vertical direction when viewed from the front.

  Then, the deformation of the frame during the earthquake is transmitted to one or more steel studs via the upper steel member and the lower steel member, and resists the shearing force.

  Therefore, the seismic performance of the frame on which the seismic retrofit frame is installed is improved without disposing the horizontal member and the oblique member in the middle part in the vertical direction when viewed from the front.

  In addition, by arranging the steel studs so as to overlap with a portion between the window openings in a front view, the frame can be reinforced by earthquake resistance while maintaining lighting from the window openings.

  ADVANTAGE OF THE INVENTION According to this invention, the seismic performance of a frame improves, without arrange | positioning a horizontal member and an oblique member in the middle part of an up-down direction in front view.

It is the front view which looked at the aseismic reinforcement frame of one embodiment of the present invention, and the frame reinforced by this aseismic reinforcement frame from the indoor side. FIG. 2 is a sectional view taken along line 2-2 of FIG. 1. It is the perspective view which looked at the frame seismically reinforced by the seismic strengthening frame of FIG. 1 from the indoor side. FIG. 4 is a perspective view of a frame reinforced by the earthquake-resistant reinforcement frame of FIG. 3 with an inner wall provided as viewed from the indoor side.

  The seismic retrofit frame of one embodiment of the present invention and a frame reinforced by the seismic retrofit frame will be described with reference to FIGS. The arrow Z in each figure indicates the vertical direction, the arrow Y indicates the out-of-plane direction of the frame, and the arrow X indicates the horizontal direction of the frame orthogonal to the arrows Z and Y. In addition, reference numeral 12 shown in FIG. 2 indicates an indoor room (indoor), and reference numeral 14 indicates an outdoor room (roof side).

<Structure>
First, the structure of the aseismic reinforcement frame 100 of the embodiment and the frame 10 reinforced by the aseismic reinforcement frame 100 will be described.

  As shown in FIGS. 1 and 3, the reinforced concrete frame 10 includes left and right columns 22, upper beams 32, and lower beams 34 in the drawing. Further, the frame 10 is provided with a wall 50 constituting an outer wall of the building. The column 22 is provided with column main reinforcing bars and shear reinforcing bars, and the beams 32 and 34 are provided with beam main reinforcing bars and shear reinforcing bars. The frame 10 is not limited to reinforced concrete. For example, the frame 10 may be made of steel-framed reinforced concrete or steel frame.

  As shown in FIGS. 1 and 3, a window opening 52, a window opening 54, and a window opening 56 are formed on the wall 50 at intervals in the left-right direction. The frame 10 is seismically reinforced by installing the seismic reinforcement frame 100 on the room 12 side (see FIG. 2) of the wall 50 of the frame 10.

  The earthquake-resistant reinforcement frame 100 includes an upper steel member 112, a lower steel member 114, a steel stud 132, and a steel stud 134. In the present embodiment, the upper steel member 112, the lower steel member 114, and the steel studs 132, 134 are all made of H-section steel. The upper steel member 112, the lower steel member 114, and the steel studs 132 and 134 may be made of a steel material other than the H-shaped steel.

  The upper steel member 112 is disposed horizontally or substantially horizontally at an upper end portion of the frame 10, and left and right ends 112 </ b> A are joined to side surfaces 22 </ b> A of the columns 22 constituting the frame 10. The lower steel member 114 is disposed horizontally or substantially horizontally at a lower end portion of the frame 10, and similarly, left and right end portions 114 </ b> A are joined to side surfaces 22 </ b> A of the columns 22 constituting the frame 10. Further, the steel frame studs 132 and the steel frame studs 134 are arranged at intervals in the left-right direction and provided along the up-down direction, and the upper and lower ends 132A, 134A are respectively connected to the upper steel member 112 and the lower side. It is joined to and integrated with the steel member 114.

  An end 112A of the upper steel member 112 and an end 114A of the lower steel member 114 are respectively pin-joined to the side surface 22A of the column 22 via the joint member 60. The joining member 60 is formed in a T-shape in plan view including a steel frame side plate 62 and a column side plate 64.

  The steel-side plate 62 of each joint member 60 is bolted to the end 112A of the upper steel member 112 and the end 114A of the lower steel member 114, and the column-side plate 64 of the joint member 60 is provided after the column 22 is installed. Is bonded to the side surface 22A of the pillar 22 by the adhesive anchor 66 of the above. In the present embodiment, a non-shrink mortar 68 is provided between the column side plate 64 of the joining member 60 and the side surface 22A of the column 22. Note that the non-shrink mortar 68 may not be provided.

  As shown in FIG. 2, the space between the web 112B and the beam 32 of the upper steel member 112 is filled with the mortar 70 from a filling hole 111 (see FIG. 1) formed in the web 112B, and along the X direction. The spiral 72 is arranged. A stud 116 is provided on the beam 32 side of the web 112B of the upper steel member 112. In the mortar 70, an adhesive anchor 74 to be installed after being driven into the beam 32 is embedded. Therefore, the upper steel member 112 is joined to the side surface 32 </ b> A of the beam 32 by the stud 116, the mortar 70, and the anchor 74, and stress is transmitted between the upper steel member 112 and the beam 32.

  Similarly, a space between the web 114B and the beam 34 of the lower steel member 114 is filled with mortar 70 from a filling hole 113 (see FIG. 1) formed in the web 114B, and a spiral 72 is formed along the X direction. Has been arranged. A stud 117 is provided on the beam 34 side of the web 114B of the lower steel member 114. In the mortar 70, an adhesive anchor 74 to be installed after being driven into the beam 34 is embedded. Thus, the lower steel member 114 is joined to the side surface 34A of the beam 34 by the stud 117, the mortar 70, and the anchor 74, and stress is transmitted between the lower steel member 114 and the beam 34.

  As shown in FIG. 1, the steel frame stud 132 is disposed so as to overlap the portion 51 between the window openings 52 and 54 in a front view as viewed from an out-of-plane direction. In addition, the steel frame stud 134 is disposed so as to overlap with the portion 59 between the window opening 54 and the window opening 56 in a front view viewed from an out-of-plane direction. Further, in the present embodiment, the steel frame studs 132, 134 are arranged so as not to overlap the window openings 52, 54, 56 in a front view.

  As shown in FIGS. 1 and 3, the steel stud 132 is divided at the center in the up-down direction and includes an upper stud 122 and a lower stud 123. Similarly, the steel stud 134 is divided at the center in the vertical direction, and is constituted by an upper stud 124 and a lower stud 125.

  The upper studs 122 and 124 and the lower studs 123 and 125 are respectively pin-joined by bolt-joining the plate-shaped joint member 80. In addition, as shown in FIG. 3, when bolting to the flange 122 </ b> A of the upper stud 122, the flange 123 </ b> A of the lower stud 123, the flange 124 </ b> A of the upper stud 124, and the flange 125 </ b> A of the lower stud 125, respectively. A notch 82 into which a hand is inserted is formed.

(Construction method)
Next, an example of a construction method will be described.

  Outside the building of the frame 10 to be reinforced by earthquake resistance, the upper steel member 112 and the upper studs 122 and 124 are joined, and the lower steel member 114 and the lower studs 123 and 125 are welded.

  The joined upper steel member 112 and upper studs 122 and 124 and the lower steel member 114 and lower studs 123 and 125 are transported to the room of the frame 10 for seismic reinforcement, and the upper steel member 112 and the lower steel member are joined. 114 is joined to the frame 10. Note that the details of the joining have already been described, and a description thereof will be omitted.

  Further, the upper studs 122 and 124 and the lower studs 123 and 125 are bolted together via the joint member 80. At this time, the operator works by putting his hand through the notch 82 (see FIG. 3).

  After the seismic reinforcement frame 100 is installed on the frame 10 in this way, as shown in FIG. 4, windows 53, 55, and 57 are provided in the window openings 52, 54, and 56, respectively, and the room of the seismic reinforcement frame 100 is provided. On the side of 12 (see FIG. 2), an inner wall 90 made of a decorative wall material is provided.

<Action and effect>
Next, the operation and effect of the present embodiment will be described.

  Between the upper steel frame member 112 and the lower steel frame member 114 of the aseismic reinforcement frame 100, only the steel studs 132, 134 which are provided with the ends 132A, 134A joined thereto and provided along the vertical direction are arranged. That is, the horizontal member and the oblique member are not arranged in the middle part in the up-down direction when viewed from the front.

  Then, the deformation of the frame 10 at the time of the earthquake is transmitted to the steel studs 132 and 134 via the upper steel member 112 and the lower steel member 114, and resists the shearing force. Therefore, the seismic performance of the frame on which the seismic strengthening frame 100 is installed is improved without disposing the horizontal member and the diagonal member at the middle part in the vertical direction of the frame 10 in a front view.

  Note that the horizontal member and the oblique member arranged in the vertical intermediate portion of the frame 10 in the above-described front view include a V-shaped or X-shaped brace material and an intermediate beam of a lattice-shaped reinforcing member.

  The steel frame studs 132, 134 in the aseismic reinforcement frame 100 of the present embodiment are divided at the center in the vertical direction, and are constituted by upper studs 122, 124 and lower studs 123, 125. The upper studs 122 and 124 and the lower studs 123 and 125 are pin-joined by bolt-joining via plate-shaped joint members 80, respectively. In this way, the center portions of the steel studs 132 and 134 that do not bear a bending moment when the frame 10 is deformed during an earthquake or the like are pin-joined to simplify the fitting.

  Further, in the present embodiment, the end portion 112A of the upper steel member 112 and the end portion 114A of the lower steel member 114 of the seismic retrofit frame 100 that do not bear the bending moment when the frame 10 is horizontally deformed during an earthquake or the like are connected to the frame 10. Fitting of the joint portions to the side surface 22A of the pillar 22 via the joint members 60 is simplified by fitting the pins together.

  Also, the upper steel member 112 and the upper studs 122 and 124 are joined outside the building of the frame 10 to be subjected to seismic reinforcement, and the lower steel member 114 and the lower studs 123 and 125 are welded to each other. The 112 and the upper studs 122 and 124, and the lower steel frame member 114 and the lower studs 123 and 125 are transported to the room of the frame 10 for seismic reinforcement. Therefore, compared to the case where the entire earthquake-resistant reinforcement frame 100 is transferred, the transfer is easier.

Furthermore, the steel frame stud 132 is disposed so as to overlap with the portion 51 between the window openings 52 and 54 in a front view as viewed from an out-of-plane direction. In addition, the steel frame stud 134 is disposed so as to overlap with the portion 59 between the window opening 54 and the window opening 56 in a front view viewed from an out-of-plane direction. Further, in the present embodiment, the steel frame studs 132, 134 are arranged so as not to overlap the window openings 52, 54, 56 in a front view. Thus, by installing the seismic reinforcing frame 100 in Frame 10, while maintaining the lighting of the window opening 52, 54, 56, Frames 1 0 is reinforced seismic.

<Others>
Note that the present invention is not limited to the above embodiment.

For example, in the above-described embodiment, the window openings 52, 54, and 56 are formed in the wall 50. However, the present invention is not limited thereto, and an opening other than the window opening, for example, a door opening may be formed. In some cases, the lower steel member 114 is disposed at the lower end of the opening of the door or the like, but the lower steel member 114 can be easily passed by straddling the lower steel member 114. Alternatively, by providing a slope or a step before and after the lower steel member 114, the opening can be more easily passed. Thus, even if the earthquake-resistant reinforcement frame 100 is installed, it is possible to easily pass through the opening.
That is, unlike the horizontal member and the diagonal member disposed in the middle part in the vertical direction, the lower steel member 114 does not block the traffic.

  In addition, for example, in the above-described embodiment, the earthquake-resistant reinforcement frame 100 includes the two steel frame studs 132 and the steel frame studs 134, but is not limited thereto. One or three or more steel studs may be provided.

  Even when one or three or more steel studs are provided, the steel studs are located between the openings (window openings, door openings, etc.) in front view as viewed from the out-of-plane direction. To overlap. Further, they are arranged so as not to overlap with the openings when viewed from the front. To explain from another viewpoint, the steel studs are appropriately arranged according to the number and arrangement of the openings so as not to interfere with the openings.

  However, the steel stud may partially or entirely overlap the opening (a window opening, a door opening, or the like) in a front view. Further, the steel frame stud may be arranged at a position that does not overlap the portion between the openings in the front view. For example, in a front view, a configuration in which one steel stud is arranged at the center in the left-right direction of the large opening may be used.

  In addition, the present invention can be applied to a frame having no opening (a window opening, a door opening, or the like) in a wall or an earthquake-resistant reinforcing frame installed in a frame having no wall.

  In the above-described embodiment, the earthquake-resistant reinforcement frame 100 is installed on the room 12 side of the frame 10 to reinforce the frame 10 in an earthquake-resistant manner. However, the present invention is not limited to this. The frame 10 may be installed on the outdoor 14 side of the frame 10 to reinforce the frame 10 by earthquake resistance. Further, the seismic retrofit frame 100 may be installed on the frame in the building to reinforce the seismic retrofit.

  Further, it goes without saying that the present invention can be implemented in various modes without departing from the gist of the present invention.

DESCRIPTION OF SYMBOLS 10 Frame 52 Window opening 54 Window opening 56 Window opening 100 Seismic strengthening frame 112 Upper steel member 114 Lower steel member 132 Steel stud 134 Steel stud

Claims (5)

An upper steel member provided at an upper end portion of the frame, and both ends of which are joined to the frame;
A lower steel member provided at a lower end portion of the frame, and both ends joined to the frame;
Both ends of the upper steel member and the lower steel member are joined, and one or more steel studs provided along the vertical direction,
Equipped with a,
Both ends of the upper steel member and both ends of the lower steel member are pin-joined to pillars constituting the frame,
Seismic reinforcement frame.   The aseismic reinforcement frame according to claim 1, wherein the steel frame stud has a structure divided at a central portion in a vertical direction and is pin-joined at the central portion. The upper steel member and the lower steel member are joined to a side surface of a beam constituting the frame,
  The aseismic reinforcement frame according to claim 1 or 2.   An upper steel member provided at an upper end portion of the frame, and both ends of which are joined to the frame;
  A lower steel member provided at a lower end portion of the frame, and both ends joined to the frame;
  Both ends of the upper steel member and the lower steel member are joined, and one or more steel studs provided along the vertical direction,
  With
  The steel stud has a structure divided at the center in the vertical direction, and is pin-joined at the center.
  Seismic reinforcement frame.   The seismic retrofit frame according to any one of claims 1 to 4 is installed on a frame,
  A plurality of window openings arranged in a horizontal direction are provided on a wall provided on the frame,
  The seismic strengthening structure wherein the steel studs of the seismic strengthening frame are arranged so as to overlap a portion between the window openings in a front view viewed from an out-of-plane direction.