JP2007107298A - Aseismatic repair method for existing reinforced concrete building - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To reduce the space obstruction ratio of an opening in which a window is installed and reduce the variation in aesthetic appearance of a building before and after the repair. <P>SOLUTION: This aseismatic repair method is for the existing reinforced concrete building comprising columns 2 formed of a reinforced concrete and a beam 3 installed across these columns 2. The repair method comprises the step of installing vertical steel frames 6 along the longitudinal direction of the columns, the step of installing lateral steel frames 7 on the outer surface of the beam 3 along the longitudinal direction, joining one end faces of the lateral steel frames 7 to one vertical steel frames 6 disposed adjacently to each other, and joining the other end face of the lateral frame 7 to the other vertical steel frames 6 disposed adjacent to each other, and the step of disposing at least one of damping members 9a, 9b on at least either of the upper and lower lateral steel frame 7 along the longitudinal direction of the beam 3 and joining the damping members 9a, 9b between the one vertical steel frames 6 disposed adjacently to each other and the other vertical steel frames 6 disposed adjacently to each other. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a seismic retrofitting method for an existing reinforced concrete building, and more specifically, seismic reinforcement can be performed from the outside of a building without removing windows, waist walls, hanging walls, etc. of the existing building. At the same time, it relates to a seismic retrofitting method that secures a feeling of opening of the window part and is excellent in aesthetic sense.

As an earthquake-proof repair method for an existing reinforced concrete building, there is known a method in which a framework structure using a steel frame is installed on the outer surface of the building (for example, see Patent Document 1).
Japanese Patent Application Laid-Open No. 11-193639

As disclosed in the above-mentioned patent document, the frame structure attached to the outer surface of the building is composed of a vertical steel frame, a transverse bone, and a brace, and this brace is just at an opening in a window or the like of the building. It is supposed to be located. For this reason, there is a problem in that the feeling of opening of the opening in which the window or the like is installed is hindered and lighting is hindered.
In addition, braces suddenly appeared in a space where nothing existed before the seismic retrofit work was performed, and the appearance before and after the seismic retrofit work was greatly changed.

  The present invention has been made in view of the above circumstances, can reduce the space inhibition rate of the opening in which a window or the like is installed, can reduce the change in appearance before and after the earthquake-resistant repair work, and has the earthquake resistance. The purpose is to provide a seismic retrofit method for existing reinforced concrete buildings that can be improved.

The present invention employs the following means in order to solve the above problems.
The seismic retrofitting method for an existing reinforced concrete building according to the present invention is a seismic retrofitting method for an existing reinforced concrete building comprising columns made of reinforced concrete and beams passed between the columns. Attaching a longitudinal steel frame along the longitudinal direction to the outer surface of the column, attaching a transverse steel frame along the longitudinal direction to the outer surface of the beam, and arranging one end surface of the transverse steel frame adjacent to each other. Joining the other longitudinal steel frame and joining the other end surface of the transverse steel frame to another adjacent longitudinal steel frame, and at least one of the upper side and the lower side of the horizontal steel frame, the longitudinal direction of the beam At least one damping member, and joining the damping member between one adjacent vertical steel frame and another adjacent vertical steel frame.
According to the seismic retrofitting method for such an existing reinforced concrete building, the vertical steel frame is along the longitudinal direction of the column and hidden behind the column as viewed from the inside (in the width direction outside of the column (in FIG. 1 Left side and / or right side) so that the horizontal steel frame and the damping member are along the longitudinal direction of the beam and hidden behind the beam (or waist wall or hanging wall) when viewed from the inside Since it is arranged (so that it does not protrude from the beam (or waist wall or drooping wall) in the width direction outside (upper side and / or lower side in FIG. 1)), for example, the space obstruction of the opening in which the window is installed The rate can be reduced, lighting can be prevented from being hindered, and the change in appearance before and after the earthquake-proof repair work can be reduced.
In addition, even if an earthquake horizontal force is applied to the columns and beams due to an earthquake, etc., and these columns and beams are deformed in the horizontal direction, they are vibrated by the vibration control members attached to the vertical and horizontal steel frames that deform together with these columns and beams. Since energy can be absorbed and attenuation can be added, the amount of deformation of columns and beams due to earthquakes can be reduced, shear failure can be prevented, and seismic loads acting on these columns and beams can be reduced. The seismic resistance can be improved (see the solid line in FIG. 2 “present invention”).
Further, as the vibration control member, for example, when the diagonal material disclosed in Japanese Patent Application Laid-Open No. 2000-81085 filed earlier by the present applicant or the history damper disclosed in Japanese Patent Application No. 2004-369773 is used. Has a plasticized region in which the cross-sectional area of the specific part (damper part) is reduced (reduced), so that the axial rigidity of the vibration control member itself can be increased, Even if an earthquake horizontal force is applied to the column and the beam, the column and the beam are deformed in the horizontal direction, and the beam is slightly bent, the energy can be reliably absorbed by the vibration control member.
Furthermore, since vertical steel frames, horizontal steel frames, and vibration control members can be attached to existing reinforced concrete buildings relatively easily, seismic retrofitting work for existing reinforced concrete buildings should be carried out easily. In addition, the construction cost for the construction can be reduced.

A reinforced concrete building according to the present invention is a reinforced concrete building comprising columns made of reinforced concrete and beams passed between the columns and the columns, on the outer surface of the columns in the longitudinal direction. A vertical steel frame is attached to the outer surface of the beam, and a horizontal steel frame is attached to the outer surface of the beam along its longitudinal direction. One end surface of the horizontal steel frame is joined to one adjacent vertical steel frame, The other end surface of the horizontal steel frame is joined to another adjacent vertical steel frame, and at least one of the vibration control members extends along the longitudinal direction of the beam at least one of the upper side and the lower side of the horizontal steel frame. Is arranged, and this vibration control member is joined between one longitudinal steel frame disposed adjacent to another longitudinal steel frame disposed adjacent.
According to such a reinforced concrete building, the vertical steel frame extends along the longitudinal direction of the column and is hidden behind the column as viewed from the inside (outside in the width direction from the column (left side and / or right side in FIG. 1)). The horizontal steel frame and the vibration control member are arranged along the longitudinal direction of the beam and hidden behind the beam (or waist wall or hanging wall) when viewed from the inside (the beam (or waist wall) (Or the hanging wall) is arranged so as not to protrude outward in the width direction (upper side and / or lower side in FIG. 1), for example, to reduce the space inhibition rate of the opening in which a window or the like is installed. It is possible to prevent the lighting from being disturbed.
In addition, even if an earthquake horizontal force is applied to the columns and beams due to an earthquake, etc., and these columns and beams are deformed in the horizontal direction, they are vibrated by the vibration control members attached to the vertical and horizontal steel frames that deform together with these columns and beams. Since energy can be absorbed and attenuation can be added, the amount of deformation of columns and beams due to earthquakes can be reduced, shear failure can be prevented, and seismic loads acting on these columns and beams can be reduced. The seismic resistance can be improved (see the solid line in FIG. 2 “present invention”).
Further, as the vibration control member, for example, when the diagonal material disclosed in Japanese Patent Application Laid-Open No. 2000-81085 filed earlier by the present applicant or the history damper disclosed in Japanese Patent Application No. 2004-369773 is used. Has a plasticized region in which the cross-sectional area of the specific part (damper part) is reduced (reduced), so that the axial rigidity of the vibration control member itself can be increased, Even if an earthquake horizontal force is applied to the column and the beam, the column and the beam are deformed in the horizontal direction, and the beam is slightly bent, the energy can be reliably absorbed by the vibration control member.

  According to the seismic retrofitting method of an existing reinforced concrete building according to the present invention, it is possible to reduce the space hindrance rate of the opening where a window or the like is installed, reduce the change in appearance before and after the seismic retrofitting work, and The effect that it can improve property is produced.

Hereinafter, a first embodiment of a reinforced concrete building (hereinafter referred to as “RC building”) according to the present invention will be described with reference to FIG. 1.
FIG. 1 is a schematic perspective view showing a part of an RC building according to the present embodiment. The RC building 1 is composed mainly of columns 2 made of reinforced concrete (RC) and beams 3 passed between the columns 2 and 2.
In addition, the code | symbol 4 in FIG. 1 has shown the waist wall, and the code | symbol 5 in FIG. 1 has shown the drooping wall.

A vertical steel frame (for example, H-shaped steel) 6 extending from the lower floor to the upper floor along the longitudinal direction (vertical direction in FIG. 1) of the pillar 2 is attached (fixed) to the outer surface of the pillar 2 to be reinforced. ing).
Further, on the outer surface of the beam 3 to be reinforced, that is, the outer surface of the beam 3 passed between the column 2 to be reinforced and the column 2 to be reinforced, along the longitudinal direction of the beam 3 (left and right direction in FIG. 1). A horizontal steel frame 7 (for example, H-shaped steel) extending so as to connect the vertical steel frame 6 and the vertical steel frame 6 is attached (fixed). One end surface (the left end surface in FIG. 1) of the horizontal steel frame 7 is connected (connected) to one flange surface (the flange surface positioned on the right side in FIG. 1) of the vertical steel frame 6 positioned on one side (the left side in FIG. 1). Has been. On the other hand, the other end surface (the end surface on the right side in FIG. 1) of the horizontal steel frame 7 is connected to one flange surface (the flange surface positioned on the left side in FIG. 1) of the vertical steel frame 6 located on the other side (the right side in FIG. 1) ( It is connected.
Thereby, the framework structure 8 by a steel frame will be installed in the outer surface (outside) of the RC building 1.

Under the horizontal steel frame 7, vibration dampers (damping members) 9 a and 9 b are arranged along the horizontal steel frame 7 and the beam 3. One end surface (left end surface in FIG. 1) of the damping damper 9a is connected (connected) to one flange surface (flange surface positioned on the right side in FIG. 1) of the vertical steel frame 6 located on one side (left side in FIG. 1). ) On the other hand, the other end surface (right end surface in FIG. 1) of the vibration damper 9 a is connected (connected) to a joining member 10 installed near the center of the horizontal steel frame 7. Similarly, for the vibration damper 9b, one end surface (the right end surface in FIG. 1) has one flange surface (the flange located on the left side in FIG. 1) on one flange surface located on the other side (right side in FIG. 1). The other end face (left end face in FIG. 1) of the vibration damper 9b is connected (connected) to the joining member 10 installed near the center of the horizontal steel frame 7.
The damping dampers 9a and 9b have a plastic deformation performance equivalent to a tensile force with respect to a compressive force, and also serve as a beam parallel to the transverse steel 7 that joins the longitudinal steel 6 and the longitudinal steel 6 together. To fulfill. As such damping dampers 9a and 9b, for example, diagonal members disclosed in Japanese Patent Application Laid-Open No. 2000-81085 previously filed by the present applicant, or history dampers disclosed in Japanese Patent Application No. 2004-369993. Etc. can be used. Moreover, when the effect regarding seismic improvement is fully acquired, you may install only any one of the said damping damper 9a, 9b.

The vertical steel frame 6, the horizontal steel frame 7, and the vibration control dampers 9a and 9b can be implemented as an “earthquake-resistant repair work” on an existing RC building.
As a construction method, first, for example, a plurality of anchor bolts are driven into the outer surface of the pillar 2 to be reinforced in an existing RC building, and the round holes formed on the web surface of the vertical steel frame 6 in these anchor bolts. The vertical steel frame 6 is attached to the outer surface of the column 2 by tightening a nut that is screwed with a threaded portion formed at the tip of the anchor bolt.
Next, for example, a plurality of anchor bolts are driven into the outer surface of the beam 3 to be reinforced in the existing RC building, and a round hole formed in the web surface of the horizontal steel frame 7 is hooked on these anchor bolts and stopped. (Latch) and tighten the nut that is screwed with the threaded portion formed at the tip of the anchor bolt to attach the horizontal steel frame 7 to the outer surface of the beam 3.
One end surface of the horizontal steel frame 7 and one flange surface of the vertical steel frame 6 located on one side, and the other end surface of the horizontal steel frame 7 and one flange surface of the vertical steel frame 6 located on the other side, for example, It joins by welding and the frame structure 8 by a steel frame is installed in the outer surface (outside) of the existing RC building.
The joining member 10 is installed below the horizontal steel frame 7, and the vibration dampers 9a and 9b are further arranged. One end surface of the vibration damper 9a and one flange surface of the vertical steel frame 6 located on one side; A gusset plate (the gusset plate fixed to the longitudinal steel frame 6 and the joining member 10 through a fastening member such as a high-strength bolt, for example, with the other end surface of the vibration damper 9a and the joining member 10 installed near the center of the horizontal steel frame. (Not shown).
As for the construction method, in addition to this, the vertical steel frame 6, the horizontal steel frame 7, and the joining member 10 may be integrated by, for example, welding joining, and then lifted and attached to the column 2 and the beam 3 Needless to say.

According to the RC building 1 according to the present embodiment, even if an earthquake horizontal force is applied to the column 2 and the beam 3 due to an earthquake or the like, and the column 2 and the beam 3 are deformed in the horizontal direction, the column 2 and the beam 3 are deformed together. Since the vibration dampers 9a and 9b attached to the vertical steel frame 6 and the horizontal steel frame 7 (that is, the frame structure 8) can absorb the vibration energy and add damping, the column 2 and the beam due to an earthquake or the like can be added. 3 can be reduced, shear failure can be prevented, seismic loads acting on these columns 2 and beams 3 can be reduced, and the seismic resistance can be improved (see FIG. 3). 2 Refer to the solid line of “Invention”).
The “conventional reinforcement” indicated by a broken line in FIG. 2 is the result of analysis performed using the earthquake-resistant repair method disclosed in Japanese Patent Laid-Open No. 11-193039 described in the background section. The "current structure" shown by the thick solid line in Fig. 2 is the result of an analysis performed using an RC building (not equipped with the vertical steel frame 6, the horizontal steel frame 7, and the damping dampers 9a and 9b) prior to the seismic retrofitting work is there.

Further, the vertical steel frame 6 extends along the longitudinal direction of the pillar 2 and is hidden behind the pillar 2 when viewed from the inside (so as not to protrude from the pillar 2 in the width direction outside (left side and / or right side in FIG. 1)). The horizontal steel frame 7 and the vibration dampers 9a and 9b are arranged along the longitudinal direction of the beam 3 and hidden behind the beam 3 (or the waist wall 4 or the drooping wall 5) when viewed from the inside (the beam 3). (Or so as not to protrude from the waist wall 4 or the hanging wall 5) in the width direction outside (upper side and / or lower side in FIG. 1), for example, space obstruction of an opening in which a window or the like is installed The rate can be reduced, and it is possible to prevent the lighting from being hindered.
Further, as the damping dampers 9a and 9b, for example, the diagonal members disclosed in Japanese Patent Application Laid-Open No. 2000-81085 previously filed by the present applicant, or the hysteresis damper disclosed in Japanese Patent Application No. 2004-369993 is used. In this case, since the cross-sectional area of the specific portion (damper portion) has a plasticized region in which the cross-sectional area is reduced (reduced), the axial rigidity of the damping dampers 9a and 9b itself can be increased. In addition, even if an earthquake horizontal force is applied to the column 2 and the beam 3 due to an earthquake or the like and the column 2 and the beam 3 are slightly deformed in the horizontal direction, the energy can be reliably absorbed by the damping damper 9.

Furthermore, since the vertical steel frame 6, the horizontal steel frame 7, and the damping dampers 9a and 9b can be attached to the existing RC building relatively easily, the seismic retrofitting work of the existing RC building can be easily performed. It can be implemented and the construction cost for the construction can be reduced.
Furthermore, the vertical steel frame 6 extends along the longitudinal direction of the column 2 and does not protrude from the column 2 in the width direction outside (left side and / or right side in FIG. 1) so as to be hidden behind the column 2 when viewed from the inside. The horizontal steel frame 7 and the vibration damper 9 are arranged along the longitudinal direction of the beam 3 and hidden behind the beam 3 (or the waist wall 4 or the drooping wall 5) when viewed from the inside (the beam 3 ( Or since it is arrange | positioned so that it may not protrude in the width direction outer side (upper side and / or lower side in FIG. 1) from the waist wall 4 or the drooping wall 5), the change of the appearance before and after earthquake-proof repair work can be reduced. .
Furthermore, in the seismic retrofit method disclosed in Japanese Patent Laid-Open No. 11-193039 described in the background section, reinforcing steel frames must be installed on all columns and beams of existing RC buildings. However, as shown in FIG. 1, if the seismic retrofitting method according to the present invention is used, a reinforcing steel frame (longitudinal steel frame) is provided only in a part (a portion having at least two columns 2 and a beam 3 connecting these columns 2). 6 and the horizontal steel frame 7) can be installed, and a seismic measure can be taken simply by installing a damping member on the reinforcing steel frame. This is because if the deformation of the column 2 and the beam 3 is taken out, this deformation can be attenuated by the vibration control member.

A second embodiment of the RC building according to the present invention will be described with reference to FIG.
The RC building 21 in the present embodiment is from the lower floor along the longitudinal direction (vertical direction in FIG. 3) of the pillar 2 on the side face of the pillar 2 to be reinforced (the face where the pillar 2 and the pillar 2 face each other). It differs from that of the first embodiment described above in that a vertical steel frame (for example, H-shaped steel) 6 extending to the upper floor is attached (fixed). Since other components are the same as those in the above-described embodiment, description of these components is omitted here.
In addition, the same code | symbol is attached | subjected to the member same as 1st Embodiment mentioned above.

  In the present embodiment, one end surface (the left end surface in FIG. 3) of the horizontal steel frame 7 is joined to the web surface of the vertical steel frame 6 located on one side (left side in FIG. 3) by, for example, welding. On the other hand, the other end surface (right end surface in FIG. 3) of the horizontal steel frame 7 is joined to the web surface of the vertical steel frame 6 located on the other side (right side in FIG. 3), for example, by welding. Further, if the strength condition is satisfied, the installation direction of the horizontal steel frame 7 is rotated by 90 °, and the flange of the vertical steel frame 6 and the flange surface of the horizontal steel frame can be joined together.

According to the RC building 21 according to the present embodiment, the eccentric amount of the damping dampers 9a and 9b with respect to the column 2 (that is, from the central axis along the longitudinal direction of the damping dampers 9a and 9b in the same horizontal plane, Since the length of the perpendicular line taken along the central axis along the longitudinal direction is smaller (shorter) than that of the first embodiment described above, the torsional moment with respect to the column 2 can be reduced.
In addition, when the vertical steel frame 6 cannot be installed on the outer surface of the pillar 2 due to legal regulations such as the Building Standards Law (when the member cannot be projected outward (front side) from the outer surface of the pillar 2) However, such legal restrictions can be avoided by adopting the embodiment.
Other functions and effects are the same as those of the above-described first embodiment, and thus description thereof is omitted here.

A third embodiment of the RC building according to the present invention will be described with reference to FIG.
The RC building 31 in this embodiment is different from that of the first embodiment described above in that an exterior plate 32 is provided on the outer surfaces of the vertical steel frame 6, the horizontal steel frame 7, and the vibration dampers 9a and 9b. . Since other components are the same as those in the above-described embodiment, description of these components is omitted here.
In addition, the same code | symbol is attached | subjected to the member same as 1st Embodiment mentioned above.

  The exterior plate 32 is a decorative plate for making the vertical steel frame 6, the horizontal steel frame 7, and the damping dampers 9 a and 9 b invisible (or difficult to see) from the outside, with respect to the vertical steel frame 6 and the horizontal steel frame 7. For example, it is joined by welding.

According to the RC building 31 according to the present embodiment, the vertical steel frame 6, the horizontal steel frame 7, and the damping dampers 9a and 9b are arranged so as to be hidden behind the exterior plate 32 when viewed from the outside, and from the outside. Since the vertical steel frame 6, the horizontal steel frame 7, and the vibration control dampers 9a and 9b cannot be easily seen, the change in appearance before and after the seismic retrofitting work can be minimized.
Other functions and effects are the same as those of the above-described first embodiment, and thus description thereof is omitted here.

A fourth embodiment of the RC building according to the present invention will be described with reference to FIGS. 5 and 7.
The RC building 41 according to the present embodiment is the same as that of the first embodiment described above in that the vertical steel frame 42 is partially provided (partly between the upper floor and the lower floor) around the beam 3. And different. Since other components are the same as those in the above-described embodiment, description of these components is omitted here.
In addition, the same code | symbol is attached | subjected to the member same as 1st Embodiment mentioned above.

According to the RC building 41 according to the present embodiment, there is no need to attach (fix) the vertical steel frame to the column 2 from the lower floor to the upper floor, so that the total amount of the vertical steel frames 42 can be reduced, and the vertical steel frame is added to the column 2. The man-hour for attaching (fixing) 42 can be reduced, and a construction cost can be reduced.
Other functions and effects are the same as those of the above-described first embodiment, and thus description thereof is omitted here.

  Note that the column 2 and the longitudinal steel frame 42 are joined together at, for example, the hatched portions in FIGS. 7 (a) to 7 (f) depending on how the damping dampers 9a and 9b are effective (or how they are effective). Yes. As a joining method, for example, chemical anchors, studs, spiral muscles, etc. can be used.

A fifth embodiment of the RC building according to the present invention will be described with reference to FIG.
The RC building 51 in the present embodiment is provided with another (new) damping damper (seismic damping member) 9a ′, 9b ′ along the horizontal steel frame 7 and the beam 3 and above the horizontal steel frame 7. And it differs from the thing of 1st Embodiment mentioned above by the point that joining member 10 'is arrange | positioned. Since other components are the same as those in the above-described embodiment, description of these components is omitted here.
In addition, the same code | symbol is attached | subjected to the member same as 1st Embodiment mentioned above.

  In the present embodiment, one end surface (the left end surface in FIG. 6) of the damping damper 9a ′ is one flange surface (the flange positioned on the right side in FIG. 6) located on one side (the left side in FIG. 6). Surface) by, for example, bolt bonding. On the other hand, the other end face (right end face in FIG. 6) of the vibration damper 9a 'is joined to a joining member 10' installed near the center of the horizontal steel frame 7 by, for example, bolt joining. The same applies to 9b ', and the description thereof is omitted.

According to the RC building 51 according to the present embodiment, the vibration dampers 9a, 9b, 9a ′, 9b ′ are arranged along the horizontal steel frame 7 and the beam 3 both above and below the horizontal steel frame 7. Further, the energy absorption performance can be further improved, and the earthquake resistance can be further improved.
Further, by providing the damping dampers 9a, 9b, 9a ′, 9b ′ on both the upper side and the lower side of the horizontal steel frame 7, as shown by solid line arrows in FIG. The center of gravity of the dampers 9a, 9b, 9a ′, 9b ′ can be made to coincide with each other (the neutral axis of the horizontal steel frame 7 and the damping dampers 9a, 9b, 9a ′, 9b ′ are made to coincide with the center of gravity of the horizontal steel frame 7). Therefore, the design evaluation can be simplified and the degree of freedom in design can be increased.
Other functions and effects are the same as those of the above-described first embodiment, and thus description thereof is omitted here.

The damping dampers 9a, 9b, 9a ′, 9b ′ may be friction dampers, oil dampers, or the like in addition to those described above.
Further, the column 2 and the vertical steel frame 6 can be joined not only by the above-described anchor bolts and nuts, but also chemical anchors, studs, spiral muscles, and the like can be used.
Furthermore, in the present embodiment, an RC building in which waist walls and hanging walls are arranged above and below the RC beam is taken as an example, but the present invention can also be applied to a structure in which the beam is shaped like a wall beam.

It is a principal part schematic perspective view which shows 1st Embodiment of RC building by this invention. Comparison of the analysis result performed using the RC building shown in FIG. 1, the analysis result performed using the conventional RC building, and the analysis result performed using the conventional RC building that has been seismically reinforced. It is a graph for doing. It is a principal part schematic perspective view which shows 2nd Embodiment of RC building by this invention. It is a principal part schematic perspective view which shows 3rd Embodiment of RC building by this invention. It is a principal part schematic perspective view which shows 4th Embodiment of RC building by this invention. It is a principal part schematic perspective view which shows 5th Embodiment of RC building by this invention. (A)-(f) is a figure for demonstrating the junction location (shaded part) of the column and a longitudinal steel frame in RC structure shown in FIG.

Explanation of symbols

1 RC building (steel reinforced concrete building)
2 Pillars 3 Beams 6 Vertical steel frames 7 Horizontal steel frames 9a Damping dampers (damping members)
9b Damping damper (damping member)
9a 'Damping damper (damping member)
9b 'damping damper (damping member)
10 joint member 10 'joint member 21 RC building (reinforced concrete building)
31 RC buildings (reinforced concrete buildings)
41 RC buildings (reinforced concrete buildings)
42 Vertical Steel Frame 51 RC Building (Reinforced Concrete Building)

Claims (2)

A seismic retrofitting method for an existing reinforced concrete building comprising columns made of reinforced concrete and beams passed between the columns.
Attaching a longitudinal steel frame to the outer surface of the column along its longitudinal direction;
A horizontal steel frame is attached to the outer surface of the beam along the longitudinal direction thereof, and one end surface of the horizontal steel frame is joined to one adjacent vertical steel frame, and the other end surface of the horizontal steel frame is adjacently disposed. Joining to other longitudinal steel frames;
At least one vibration control member is disposed along at least one of the upper and lower sides of the horizontal steel frame along the longitudinal direction of the beam, and the vibration control member is disposed adjacent to one longitudinal steel frame disposed adjacent thereto. And a step of joining with other vertical steel frames made by the earthquake-proofing method for an existing reinforced concrete building. A reinforced concrete building comprising columns made of reinforced concrete and beams passed between the columns.
A vertical steel frame is attached to the outer surface of the column along its longitudinal direction,
A horizontal steel frame is attached to the outer surface of the beam along the longitudinal direction thereof, and one end surface of the horizontal steel frame is joined to one longitudinal steel frame arranged adjacently, and the other end surface of the horizontal steel frame is adjacent. It is joined to other arranged vertical steel frames,
At least one vibration control member is disposed along at least one of the upper and lower sides of the horizontal steel frame along the longitudinal direction of the beam, and the vibration control member is disposed adjacent to one adjacent vertical steel frame. Reinforced concrete building characterized in that it is joined with other vertical steel frames.

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