JP6535152B2 - Reinforcement method of structure - Google Patents

Description

The present invention relates to a method of reinforcing a reinforcing device for reinforcing a structure having a structural frame such as a column or a beam.

  Conventionally, various structures have been researched and developed that can absorb load energy at the time of an emergency such as an earthquake or a storm. In the case of RC (reinforcing concrete) or PC (precast) frame having energy absorbing capacity, high strength bending tensile steel that deforms within the elastic range against emergency load and does not yield, and heat of emergency load energy The dampers that convert to and absorb are provided as separate members. However, in the configuration in which the damper and the bending and tensile steel material are provided separately as in the conventional RC or PC frame, the damper is disposed outside the structural frame and a wall is needed to hide the damper, or human flow Design constraints such as being in the way of

Therefore, with regard to prestressed concrete members, in addition to forming steel materials for introducing prestress, a tensile force is introduced so that strain at yield is exceeded or stress degree is close to that of stress at yield point when introducing prestress. There is a conventional example of forming a steel material. In this conventional example, since two types of steel materials are required, the work efficiency decreases due to the increase in the number of on-site construction points, and it becomes difficult to ensure the stability of the construction quality.
Further, there is a conventional example of a steel material in which a portion from the surface to a predetermined depth is a low strength portion and the inside of the low strength portion is a high strength portion by tempering only the surface of the hardened steel bar. In this conventional example, it is difficult to uniformly manage the strength of each of the low strength part and the high strength part, the strength difference between them, the depth of the low strength part and the like, and securing the stability of the construction quality becomes an issue.

In view of the above, the portions at both axial end sides are respectively provided in the steel pipe fixed to the structural frame and the steel pipe inserted in the steel pipe and the both ends fixed to the end of the steel pipe respectively A fixing member for fixing the steel bar to the steel pipe and holding the steel bar axially outward from the axial direction when the steel pipe is compressed, the steel pipe having a strength higher than that of the steel bar; There is a conventional example of a steel material having a yield point lower than that of a steel pipe (Patent Document 1).
In the conventional example of Patent Document 1, both the yield point and the energy consumption can be secured large.
Since the steel pipe rather than the steel bar is a high strength steel material, the high strength steel material does not yield when the compressive force is applied, and the steel bar is restrained, as compared with the case where the strength of the steel bar is made higher than that of the steel pipe. A large elastic range can be secured. Therefore, since both of the yield point and the energy consumption can be secured larger, it is possible to sufficiently absorb the load energy at the time of an earthquake or a storm. Furthermore, since steel pipes and steel bars are assembled in advance to form a steel material, the number of construction points at the site does not increase, and there is also an advantage that the stability of construction quality can be easily ensured.

Patent No. 5017724 gazette

The conventional example of Patent Document 1 only discloses a configuration in which steel is attached to the mounting plate of various structural frames such as RC, PC frame, brace frame, etc., the steel is attached to the structural frame and the structure is effectively achieved. The configuration to be reinforced is not disclosed.
Therefore, there is a demand for a reinforcing device for specifically attaching the conventional example of Patent Document 1 having the above-described advantages to a structural frame.

The present invention is capable of absorbing load energy such as earthquakes, does not increase the number of construction points at the site, is easy to ensure the stability of construction quality, has a low manufacturing cost, and reliably reinforces the structural body The purpose is to provide a reinforcement method for

The method for reinforcing a structure according to the present invention is a method for reinforcing a structure using an apparatus for reinforcing a structure by attaching a steel material to a structure body, wherein the device for reinforcing the structure comprises the above-mentioned steel material and The steel frame has a first mounting portion and a second mounting portion which are provided to be opposed to each other, and in the steel material, portions on both axial end sides are respectively the first mounting portion and the second mounting And a steel bar inserted into the steel pipe, a steel bar fixing nut provided at each end of the steel pipe for fixing the steel bar to the steel pipe, and the steel bar A pair of fixing members for pressing the bar steel from an axial end toward an axial center via a fixing nut, a first locking portion attached to the steel pipe and locked to the first mounted portion; Attached to the steel pipe and engaged with the second mounting portion The first mounting portion and the second mounting portion are locked to a concrete body, the concrete body is a foundation, and the first mounting portion is the second locking portion. The anchor plate is embedded in the foundation, the second attachment portion has a base plate facing the upper surface of the foundation, and the anchor plate is formed with an insertion hole through which the steel pipe is inserted. One locking portion has one of the fixing members of the pair of fixing members, and the one fixing member has a fastener disposed so as to sandwich the anchor plate, and the second locking portion is A nut disposed between the other of the pair of fixing members and the base plate and screwed to the male screw portion; and a gap between the nut and the other fixing member And the steel pipe is the strength of the steel bar. The steel bar fixing step of inserting the steel bar into the steel pipe and fixing both ends of the steel bar to both ends of the steel pipe, which has a higher strength than the steel bar and a yield point lower than the yield point of the steel pipe. And a first locking step of locking the steel pipe and the first mounting portion at the first locking portion, a tension of the steel material, and a second locking portion of the steel pipe and the second mounting portion And a step of pressing the steel bar from both axial end portions toward an axial center portion , and the first locking step includes the step of holding the anchor plate in the pair of fixing members. A positioning plate held by one of the fixing members and the fastener and attached to the end of the steel pipe opposite to the end where the anchor plate is provided after the first locking step Position the steel pipe in the formwork, and place the concrete in this formwork The slurry was Da設, then removed from the steel tube the positioning plate after said concrete slurry became basic by curing, the second locking step, an end of the steel pipe in which the positioning plate removed The step of locking the base plate to the base and thereafter filling grout material between the base plate and the upper surface of the base and pressing the steel bar is performed after the second locking step, and the other is fixed By screwing a member to the male screw portion, the bar steel fixing nut is characterized in that the bar steel is pressed from the both axial end portions toward the axially central portion .

In the present invention having the above configuration, the steel pipe is installed in the structural frame, and the first locking portion of the steel pipe and the first attached portion of the structural frame are locked, and the second locking portion of the steel pipe and the first mounting frame Since the second mounting portion is locked, load energy generated by an earthquake or the like is reliably transmitted to the steel material by the reinforcing device.
In steel materials attached to a structural frame, when a tensile force is applied to the steel pipe by load energy transmitted through the first mounting portion and the second mounting portion, the end portions of the steel pipe and the steel bar are appropriately selected. The steel pipe and the steel bar extend because they are fixed by various fixing means. On the other hand, when compressive force is applied to the steel pipe by the energy of the load, the compressive force acting on the steel pipe is transmitted to the steel bar through the fixing member so that the steel bar jumps out from the end of the steel pipe or is bent Without being compressed within the steel pipe.
Since the steel pipe deforms within the elastic range even after a load exceeding the yield point of the steel bar is given and the steel bar yields, a large yield point as a whole steel material obtained by adding a share due to the steel bar to the steel steel yield point is obtained. Since the strain of the bar steel after yield increases while being restrained by the steel pipe without increasing the stress due to the load, it is possible to secure a large hysteresis due to the loading and unloading of the load. The energy consumption can be increased because the load energy corresponding to the hysteresis characteristics of the bar is consumed.
As described above, in the present invention, the steel pipe has a higher strength than the steel bar and the steel bar has a lower yield point than the steel pipe, so that the yield point of the steel as a whole can be increased and the energy consumption can be increased. It can be enlarged. Moreover, by fixing the respective ends of the steel pipe and the bar by appropriate fixing means, these steel pipe and bar can be integrated before the on-site construction, so the number of construction points on the site does not increase. .

In the method for reinforcing a structure according to the present invention, the first attached portion includes an anchor plate, the second attached portion includes a base plate, and the first locking step includes the anchor plate as the pair of the anchor plates. Positioning held by one of the fixing members and a fastener, and after the first locking step, the steel pipe is attached to the end opposite to the end where the anchor plate is provided The steel pipe is positioned with the support plate and disposed in the mold, and a concrete slurry is cast in the mold, and after the concrete slurry is cast, the positioning plate is removed from the steel pipe, and the second engagement is performed. stop step, the because the positioning plate that abolish engaging said base plate at an end portion of the steel pipe is removed, by using the positioning plates, containers set in the mold of a steel pipe It can be carried out in. Moreover, after positioning of the steel pipe, the positioning plate is removed from the steel pipe and the base plate is provided at the position where the positioning plate was present, whereby the structural body provided on the base plate can be reliably joined to the concrete.

  In the present invention, load energy such as earthquake can be absorbed, and the number of construction points at the site does not increase, and the stability of construction quality can be easily ensured, the manufacturing cost is low, and the structural frame can be reliably reinforced. it can.

BRIEF DESCRIPTION OF THE DRAWINGS The partially broken front view which shows the reinforcement apparatus of the structure concerning 1st Embodiment of this invention. FIG. 2 is a cross-sectional view taken along line II-II in FIG. Side view of steel. Side view of a steel pipe. Side view of a steel bar. The longitudinal cross-sectional view which shows the reinforcement apparatus of the structure concerning 2nd Embodiment of this invention. The disassembled front view which fractured a part of steel materials. The front view which shows the steel materials before constructing at a construction site. Sectional drawing which shows after after putting concrete in the state which installed steel materials. Sectional drawing which shows the steel materials after reinforcing a structure frame. The front view which fractured a part which shows the reinforcement device of the structure concerning a 3rd embodiment of the present invention. The front view which fractured | ruptured a part which shows the state in which the steel bar was inserted in the steel pipe. The front view which fractured | ruptured a part which shows the state which fixed the both ends of the steel pipe and the bar steel. The front view which fractured | ruptured a part which shows the state which mounted | wore the to-be-attached part with the steel pipe with which steel bar was inserted. The front view which fractured | ruptured a part which shows the state which mounted the latching | locking part to the edge part of a steel pipe. The schematic which shows the state in which the reinforcement apparatus of the structure concerning 4th Embodiment of this invention was provided in the building. The front view which shows the principal part of 4th Embodiment.

Embodiments of the present invention will be described based on the drawings. Here, in the description of each embodiment, the same components will be denoted by the same reference numerals to omit or simplify the description.
1 to 5 show a first embodiment of the present invention.
The first embodiment is a reinforcement device 100 for reinforcing columns and beams of a precast concrete body.
1 and 2 show the overall configuration of the first embodiment.
In FIG. 1 and FIG. 2, the structural frame comprises an elongated first precast concrete body C1 constituting a column, and a beam disposed so as to extend horizontally and sandwich the first precast concrete body C1. A book second precast concrete body B1 is provided. A building which is a structure is constructed by combining the first precast concrete body C1 and the second precast concrete body B1.

Step parts C 'are formed on the side surfaces of the first precast concrete body C1 opposite to each other. A through hole Co penetrating horizontally is formed on the step portion C ′ of the first precast concrete body C1.
The end of the second precast concrete body B1 is locked to the step C '.
The second precast concrete body B1 is a state in which a beam body B10, flange portions B11 respectively formed on the upper and lower sides of the beam body B10, and end portions of the flange portions B11 are closed to sandwich the first precast concrete body C1. And the ribs B121 and B122 opposed to each other. These ribs B121 and B122 are respectively in contact with the side surface of the first precast concrete body C1. In the ribs B121 and B122, through holes Bo having the same inner diameter as the through holes Co and the same axial center are formed.
In the present embodiment, in FIG. 1, the first mounting portion is configured from the rib B121 positioned on the right side, and the second mounting portion is configured from the rib B122 positioned on the left side. The first precast concrete body C1 may be a beam, and the second precast concrete body B1 may be a column disposed with the beam interposed therebetween.

The reinforcing device 100 is configured to include four steel members 1. The four steel materials 1 are disposed two each at the upper and lower sides of the beam body B10 (see FIG. 2).
The steel material 1 penetrates the through holes Bo and Co, and the bending tensile steel material 10 whose both ends project from the ribs B121 and B122, and a mounting nut 15 for attaching a portion on one axial end side of the bending tensile steel material 10 to the rib B121 The first bag nut 16 as a fixing member provided at one axial end of the bending and tensile steel material 10, and the other one of the bending tensile steel 10 and the bending tensile steel 10 fixed to the rib B122 A second bag nut 17 as a member is provided.
A washer 181 is interposed between the mounting nut 15 and the rib B121. An anchor plate 191 is interposed between the washer 181 and the rib B121. The anchor plate 191 may be composed of two plates for simultaneously engaging two bending tensile steels 10 respectively on the left and right, or may be composed of four in total for engaging the individual bending tensile steels 10 . In the first embodiment, the mounting nut 15, the washer 181, and the first locking portion that locks the rib 121 from the anchor plate 191 are configured.
A washer 182 is interposed between the second cap nut 17 and the rib B122. An anchor plate 192 is interposed between the washer 182 and the rib B122. The anchor plate 192 may be configured of one piece for simultaneously engaging four bending tensile steel members 10, or may be configured of a total of four pieces for engaging the individual bending tensile steel members 10.
In the first embodiment, a second locking portion that locks the rib B 122 from the second cap nut 17, the washer 182 and the anchor plate 192 is configured.

FIG. 3 is a side view of the bending and tensile steel material 10. The bending tensile steel 10 has a steel pipe 11, a steel bar 12 inserted into the steel pipe 11, and a round nut 13 as a steel bar fixing nut for fixing the steel pipe 11 and the steel bar 12.
As shown in FIGS. 1 and 4, the steel pipe 11 is formed of a high strength steel material, and in a portion including the end edge of the both ends to the position fixed to the ribs B121 and B122, the steel pipe male thread 11A Is formed.
Steel tube 11, than the strength of the steel bar 12 has a high strength, the strength of the steel pipe 11, or yield point or 0.2% proof stress exceeds 390 N / mm ^2, or as the tensile strength exceeds 490 N / mm ² It is set to. In the present embodiment, "high strength", yield point or 0.2% proof stress exceeds 390 N / mm ² or, or tensile strength refers to exceed 490 N / mm ^2.
As shown in FIGS. 3 and 5, at both ends of the steel bar 12, a bar steel male screw 12A protruding from the end of the steel pipe 11 is formed. The steel bar 12 is a steel material having a lower yield point than the steel pipe 11.

The bar 12 only needs to have a low yield point region at least in part compared to the steel pipe 11, and it is not necessary to provide a low yield point region in all the regions. The area other than the low yield point area of the bar 12 may be the same yield point as the steel pipe 11. In this case, both ends of the bar 12 are the same area as the high yield point as the steel pipe 11, and the central portion between them is the low yield point. It may be a region. Conversely, the central portion of the steel bar 12 may be a high yield point region, and both sides thereof may be low yield point regions. Furthermore, one may be a high yield point region and the other may be a low yield point region bordering on the middle portion. It is also good.
In addition, in order to form a high yield point area | region and a low yield point area | region in one bar steel 12, various methods are employable. For example, the steel material in the low yield point region and the steel material in the high yield point region are joined by pressure welding, friction welding, welding, an adhesive, screwing, or the like. Also, in order to manufacture the steel bar 12, prepare a rod body for reinforcing bars whose yield point is the same as the low yield point region as a whole, heat treat one end side of this rod body for reinforcing bars to form a high yield point region May be.

The method to reinforce a structure using reinforcement device 100 of a 1st embodiment is explained.
[Steel bar fixing process]
In the factory, the steel bars 12 are inserted into the inside of the steel pipe 11, and the round nuts 13 are screwed into the respective steel bar male screw portions 12A. At this time, the round nut 13 is screwed in tightly until the bearing surface of the round nut 13 and the end face of the steel pipe 11 are in close contact with each other. By integrating the steel pipe 11 and the steel bar 12 in this manner, the steel bar is fixed and the bending and tensile steel material 10 is assembled.
[First locking step]
The first precast concrete body C1 and the second precast concrete body B1 are manufactured at a factory, and these are transported to a construction site.
At the construction site, the first precast concrete body C1 is erected as a pillar, and the second precast concrete body B1 constituting the beam is locked to the step portion C ′ of the first precast concrete body C1.
Furthermore, the bending tensile steel 10 is inserted into the through holes Co and Bo which are penetrated by the ribs B121 and B122 of the first precast concrete body C1 and the second precast concrete body B1.
Thereafter, the anchor plate 191 and the washer 181 are provided at one end of the steel pipe 11, and the mounting nut 15 is screwed into the steel pipe male screw portion 11A to lock the steel pipe 11 and the rib B121.

[Second locking step]
An anchor plate 192 and a washer 182 are provided at the other end of the steel pipe 11, and the second cap nut 17 is screwed into the steel pipe male screw portion 11A to clamp the steel pipe 11 with a predetermined torque. Thereby, the steel pipe 11 and the rib B122 are locked. Here, the bending and tensile steel material 10 may be tensioned, in which case a hydraulic jack or the like is used.
[Compression process]
Thereafter, the first cap nut 16 is screwed into the steel pipe male screw portion 11A. At this time, the bottom surface of the first bag nut 16 is in close contact with the round nut 13. As described above, the steel pipe 11 is compressed by the first cap nut 16 and the second cap nut 17 which are fixing members, and the steel bar 12 is pressed from the axially outer side toward the axially inner side.

In the reinforcing device 100 having the above configuration, the ribs B121 and B122 of the second precast concrete body B1 when the load energy at the time of an emergency such as an earthquake or a storm acts on the first precast concrete body C1 and the second precast concrete body B1. A tensile force or a compressive force acts on the bending tensile steel material 10 through the
When a tensile force acts on the bending and tensile steel material 10, the steel pipe 11 fixed to the ribs B121 and B122 and the steel bar 12 fixed to the steel pipe 11 by the round nut 13 extend. On the other hand, when a compressive force acts on the steel pipe 11, the steel pipe 11 compresses and deforms within the elastic range, and the compressive force acting on the steel pipe 11 is transmitted to the steel bar 12 via the first bag nut 16 and the round nut 13. That is, since the first cap nut 16 presses the steel bar 12 from the outside in the axial direction toward the inside in the axial direction, the steel bar 12 is compressed in a state of being restrained in the steel pipe 11 without jumping out or bending from the end of the steel pipe 11 Be done.

Therefore, the following effects can be achieved in the first embodiment.
(1) The reinforcing device 100 includes the steel material 1. This steel material 1 is inserted into the steel pipe 11 provided on the ribs B121 and B122 of the second precast concrete body B1 and the steel pipe 11, and both ends thereof are ends of the steel pipe 11 respectively. First fixed to the both ends of the steel pipe 11 and the steel pipe 11, and when the steel pipe 11 is compressed, the steel bar 12 is pressed from the axially outer side toward the axially inner side A steel pipe comprising: a cap nut 16 and a second cap nut 17; a mounting nut 15 attached to the steel pipe 11 and engaged with the rib B 121; and a second cap nut 17 attached to the steel pipe 11 and engaged with the rib B 122 11 was made higher than the strength of the steel bar 12, and the steel bar 12 was made a yield point lower than the yield point of the steel pipe 11. Therefore, the mounting nut 15 and the rib B121 of the second precast concrete body B1 are engaged, and the second cap nut 17 and the rib B122 of the second precast concrete body B1 are engaged. The reinforcement device 100 reliably transmits the steel material 1. And while being able to enlarge the yield point as the whole steel materials, energy consumption can be enlarged. Moreover, by fixing the respective ends of the steel pipe 11 and the steel bar 12 to each other, it is possible to unify the steel pipe 11 and the steel bar 12 before the on-site construction, so the number of construction points in the field does not increase. .

(2) Since the rib B121 and the rib B122 are respectively locked to the first precast concrete body C1, even if load energy is transmitted to the steel pipe 11 from the first precast concrete body C1 via the ribs B121 and B122, The load energy can be sufficiently absorbed by the steel material 1. Therefore, the structure can be sufficiently reinforced.

(3) A plurality of second precast concrete members arranged in a direction crossing the elongated first precast concrete body C1 and the longitudinal direction of the first precast concrete body C1 with the first precast concrete body C1 interposed therebetween A body is configured to include the body B1. And rib B121 and rib B122 are respectively made of concrete, and are integrally provided in the end of the second precast concrete body B1. The steel pipe 11 is disposed so as to penetrate the first precast concrete body C1 and the ribs B121 and B122 and has an end protruding from the ribs B121 and B122, and the mounting nut 15 is attached to one end of the steel pipe 11 protruding from the rib B121. A second bag nut 17 is provided at the other end of the steel pipe 11 which is provided and protrudes from the rib B122. From the above configuration, the steel product 1 can reliably reinforce a building in which a column and a beam are formed from the first precast concrete body C1 and the second precast concrete body B1.

(4) The second bag nut 17 serves both as a fixing member for pressing the steel bar 12 from the outside in the axial direction toward the inside in the axial direction and a locking member for locking the rib B122. Can be simplified and the manufacturing cost can be lowered.

(5) Since the ribs B121 and B122 are respectively provided in advance in the two second precast concrete bodies B1, also from this point, it is possible to reduce the number of parts and to reduce the manufacturing cost of the reinforcing device 100.

(6) Since the steel materials 1 are arranged two by two on the left and right sides of the beam body B10 of the second precast concrete body B1, the energy load can be equally dispersed and absorbed by these four steel materials 1 .

Next, a second embodiment of the present invention will be described based on FIG. 6 to FIG.
The second embodiment is a reinforcing device 200 for reinforcing a column provided on a foundation.
FIG. 6 shows the entire configuration of the second embodiment.
In FIG. 6, the structural frame is configured to include a foundation D formed by placing concrete and a column C provided on the foundation D. The column body C includes a base plate 20 disposed on the upper surface of the base D, and a column C 2 erected on the base plate 20. A grout material G is provided between the foundation D and the base plate 20.
The reinforcing device 200 is configured to include four steel members 1 (only two are shown in FIG. 6) disposed in the front, rear, left, and right with the column C2 interposed therebetween.

The steel material 1 has a bending tensile steel material 10 whose upper end is inserted through the insertion hole 20A formed in the base plate 20 and embedded in the foundation D from the center to the lower end, and a mounting for attaching the base plate 20 to the upper end of the bending tensile steel material 10 A nut 15, a first fixing nut 26 provided at the upper end of the bending tensile steel 10, and a second fixing nut 27 provided at the lower end of the bending tensile steel 10 are provided. A fastener 21 made of a nut is provided above the second fixing nut 27, and the anchor plate 22 is held between the fastener 21 and the second fixing nut 27. The anchor plate 22 is formed with an insertion hole 22A for inserting a steel pipe 11 described later.
In the second embodiment, the mounting nut 15 constitutes a first locking portion. The first fixing nut 26 and the second fixing nut 27 constitute a pair of fixing members. The second fixing nut 27 doubles as a second locking portion. The anchor plate 22 constitutes a first attached portion, and the base plate 20 constitutes a second attached portion.

As shown in FIG. 7, the bending and tensile steel material 10 has a steel pipe 11, a steel bar 12 inserted into the steel pipe 11, and a round nut 13 for fixing the steel pipe 11 and the steel bar 12.
At an upper end portion of the steel pipe 11, a steel pipe male screw portion 11A for screwing the mounting nut 15 and the first fixing nut 26 is formed. At the lower end portion of the steel pipe 11, a steel pipe male screw portion 11A for screwing the fastener 21 (not shown in FIG. 7) and the second fixing nut 27 is formed.
The relationship of strength between the steel pipe 11 and the steel bar 12 is the same as that in the first embodiment.

The method of reinforcing a structure using the reinforcement apparatus 200 of 2nd Embodiment is demonstrated based on FIGS. 8-10.
[Steel bar fixing process]
As in the first embodiment, in the factory, the steel bars 12 are inserted into the inside of the steel pipe 11, and the round nuts 13 are screwed into the respective steel bar male screw portions 12A. By integrating the steel pipe 11 and the steel bar 12, the steel bar is fixed and the bending and tensile steel 10 is assembled.

[First locking step]
As shown in FIG. 8, at the construction site, the fastener 21 is screwed into the steel pipe male screw portion 11A at the lower end of the steel pipe 11, the anchor plate 22 is inserted from the lower end of the steel pipe 11, and then the second fixing nut 27 Is screwed into the steel pipe male screw portion 11A. The second fixing nut 27 is sufficiently tightened so that the anchor plate 22 is held between the second fixing nut 27 and the fastener 21 so as not to wobble.
After the first locking step, the positioning plate 23 is attached to the upper end of the steel pipe 11 with a pair of thin nuts 24 for assembly.

Then, the bending and tensile steel material 10 is placed in a mold (not shown). At this time, positioning is performed using the positioning plate 23.
Place concrete slurry in the formwork. The concrete slurry hardens and becomes a foundation D when a predetermined time passes after the placement of the concrete slurry. After the concrete slurry hardens, the positioning plate 23 is removed from the steel pipe 11.

[Second locking step]
As shown in FIG. 9, the base plate 20 is locked to the upper end of the steel pipe 11 from which the positioning plate 23 has been removed. Therefore, the mounting nut 15 is screwed into the steel pipe male screw portion 11A formed on the upper end portion of the steel pipe 11, and the base plate 20 is locked.
Thereafter, the grout material G is filled between the base plate 20 and the upper surface of the base D.
[Compression process]
Thereafter, the first fixing nut 26 is screwed into the steel pipe male screw portion 11A. As a result, the steel pipe 11 is compressed by the first fixing nut 26 and the second fixing nut 27, and the steel bar 12 is pressed from the axially outer side toward the axially inner side.
When the compression process is complete, remove the formwork.

In the reinforcing device 200 having the above configuration, when load energy at the time of an emergency such as an earthquake or a storm acts on the foundation D and the column C, the tensile force or the tensile force is applied to the bending tensile steel 10 through the base plate 20 and the anchor plate 22. Compressive force works.
When a tensile force or a compressive force acts on the bending tensile steel material 10, the steel pipe 11 locked to the base plate 20 and the anchor plate 22 and the steel bar 12 fixed to the steel pipe 11 by the round nut 13 stretch or compress. . When the compressive force acting on the steel pipe 11 is transmitted to the steel bar 12 through the first fixing nut 26 and the round nut 13, the first fixing nut 26 presses the steel bar 12 axially outward from the axial direction outer side. Therefore, the steel bar 12 is compressed in a state of being restrained in the steel pipe 11 without popping out or bending from the end of the steel pipe 11.

Therefore, in the second embodiment, in addition to the same operation and effect as (1) and (2) of the first embodiment, the following operation and effect can be achieved.
(7) The bending and tensile steel material 10 is embedded in the foundation D with the upper end exposed, the anchor plate 22 is attached to the lower end of the steel pipe 11, and the base plate 20 facing the upper surface of the foundation D is attached to the upper end of the steel pipe 11. Therefore, even if a force is applied in the direction to move relatively close or apart between the anchor plate 22 and the base plate 20 via the foundation D due to an earthquake or the like, load energy such as an earthquake is sufficiently absorbed by the bending and tensile steel 10. can do.

(8) The anchor plate 22 is formed with an insertion hole 22A through which the steel pipe 11 is inserted, and the anchor plate 22 into which the steel pipe 11 is inserted is held between the second fixing nut 27 and the fastener 21. The force from the foundation D is reliably transmitted to the steel material 1 through the anchor plate, so that the steel material 1 can be prevented from coming off the foundation D, and the load energy can be sufficiently absorbed by the steel material 1. Moreover, since the fixing of the steel pipe 11 and the steel bar 12 and the locking of the anchor plate 22 to the steel pipe 11 can be simultaneously realized by the second fixing nut 27, the number of parts can be reduced.

(9) The reinforcing device 200 is configured to include the four steel members 1 disposed with the column C2 interposed therebetween, so that the energy load can be uniformly dispersed and absorbed by the four steel members 1.

Next, a third embodiment of the present invention will be described based on FIG. 11 to FIG.
The third embodiment is a reinforcing device 300 using the steel material 1 as a tendon made of PC.
FIG. 11 shows the entire configuration of the third embodiment.
In FIG. 11, the structural body is a block E made of concrete to which prestressing is applied by the steel material 1. In the block E, an insertion hole Eo is formed to penetrate.
The reinforcing device 300 is configured to include a plurality of (only one is shown in FIG. 11) steel members 1.

The steel material 1 includes a bending tensile steel material 10 inserted into the insertion hole Eo of the block E, a mounting nut 15 provided at one end of the bending tensile steel material 10, and a first fixing nut provided at one end of the bending tensile steel 10 And a second fixing nut 27 provided at the other end of the bending and tensile steel material 10. The fixing plate 31 is held between the mounting nut 15 and the block E, and the fixing plate 32 is held between the second fixing nut 27.
In the third embodiment, the fixing plate 31 constitutes a first attached portion, and the fixing plate 32 constitutes a second attached portion.
The bending and tensile steel material 10 has a steel pipe 11, a steel bar 12 inserted into the steel pipe 11, and a round nut 13 for fixing the steel pipe 11 and the steel bar 12.
The relationship of strength between the steel pipe 11 and the steel bar 12 is the same as that in the first embodiment.

The method of reinforcing a structure using the reinforcement apparatus 300 of 3rd Embodiment is demonstrated based on FIGS. 12-15.
[Steel bar fixing process]
As shown in FIG. 12, in the factory, the steel bars 12 are inserted into the inside of the steel pipe 11, and as shown in FIG. 13, the round nuts 13 are screwed into the respective steel bar male screw portions 12A. By integrating the steel pipe 11 and the steel bar 12, the bending and tensile steel material 10 is assembled.
[First locking step]
At the construction site, as shown in FIG. 14, the bending tensile steel 10 is inserted into the insertion hole Eo of the block E, the fixing plate 31 is attached to one end of the steel pipe 11 of the bending tensile steel 10, and the fixing plate is at the other end. Attach the 32.

[Second locking step]
As shown in FIG. 15, the second fixing nut 27 is screwed into the steel pipe male screw portion 11 </ b> A at the other end of the steel pipe 11. Thereby, the steel pipe 11 and the fixing plate 32 are locked.
In the third embodiment, tension is applied to the bending and tensile steel material 10. In that case, the fixing nut 15 is previously screwed into the steel pipe male screw portion 11A. Use a hydraulic jack etc. to apply tension.
The mounting nut 15 is screwed into the steel pipe male screw portion 11A at the other end of the steel pipe 11, and the fixing plate 31 is held between the mounting nut 15 and the block E.
[Compression process]
Thereafter, the first fixing nut 26 is screwed into the steel pipe male screw portion 11A. At this time, the bottom surface of the first fixing nut 26 is in close contact with the round nut 13. As described above, the steel pipe 11 is compressed by the first fixing nut 26 and the second fixing nut 27 which are fixing members, and the steel bar 12 is pressed from the axially outer side toward the axially inner side.
Furthermore, grout material (not shown) is filled in the necessary places.

In the reinforcing device having the above configuration, when load energy at an emergency such as an earthquake or a storm acts on the block E, a tensile force or a compressive force acts on the bending tensile steel 10 through the fixing plates 31 and 32.
When a tensile force acts on the bending tensile steel material 10, the steel pipe 11 and the steel bar 12 stretch. On the other hand, when a compressive force acts on the steel pipe 11, the steel pipe 11 compresses and deforms within the elastic range, and the compressive force acting on the steel pipe 11 is transmitted to the steel bar 12 via the first fixing nut 26 and the round nut 13. .

Therefore, in the third embodiment, in addition to the effects and advantages similar to (1) and (2) of the first embodiment, the following effects can be achieved.
(10) The bending tensile steel 10 having the steel pipe 11 and the steel bar 12 is inserted into the block E to which prestressing is to be applied, and the fixing plate 31 is held between the block E and the mounting nut 15. Since the fixing plate 32 is held by the block E, even if a force is applied between these fixing plates 31 and 32 in the direction to relatively approach or separate, load energy such as earthquake is bent and tensile steel 10 Can be absorbed well.

Next, a fourth embodiment of the present invention will be described based on FIG. 16 and FIG.
The third embodiment is a reinforcing device 400 for reinforcing the steel material 1 in the opening of a building.
FIG. 16 shows the entire configuration of the fourth embodiment.
In FIG. 16, a building H is provided on the foundation F. The structural frame of the building H includes a plurality of columns C4 and beams B4. The reinforcing device 400 of the fourth embodiment is attached to the flat rectangular opening W surrounded by the column C4 and the beam B4. These pillars C4 and beams B4 may be made of wood or concrete. In the case of concrete, it may be cast-in-place concrete or precast concrete.
The reinforcing device 400 has a steel material 1 bridged on a diagonal line of mutually facing inward corners of the opening W, and a steel material 1 bridged to a corner along a diagonal line intersecting the diagonal line. These steel materials 1 constitute a brace in which two pieces form one set.
The steel material 1 may be provided in all the openings W as shown in FIG. 16, but may be provided in some of the openings W.

The state in which the reinforcing device 400 is attached to the structural frame is shown in FIG. In addition, in FIG. 17, only one steel material 1 is shown.
In FIG. 17, a portion where the column C <b> 4 and the beam B <b> 4 intersect is an installation portion H <b> 4 of the steel material 1.
The steel material 1 is provided at a bending tensile steel material 10 whose both ends are installed at mutually facing installation parts H4 of the structural body, a mounting nut 15 provided at one end of the bending tensile steel material 10 and one end of the bending tensile steel 10 And a second bag nut 17 provided at the other end of the bending and tensile steel material 10.
The bending and tensile steel material 10 has a steel pipe 11, a steel bar 12 inserted into the steel pipe 11, and a round nut 13 for fixing the steel pipe 11 and the steel bar 12. The relationship of strength between the steel pipe 11 and the steel bar 12 is the same as that in the first embodiment.

A plate-like first fitting 41 is attached to one end of the steel pipe 11 by a mounting nut 15. In the first fitting 41, a hole 41A for inserting the steel pipe 11 is formed.
One end portion of the bending and tensile steel material 10, the mounting nut 15, the first cap nut 16, and the first fitting 41 are embedded in the installation portion H4. In the fourth embodiment, the first fitting 41 constitutes a first mounted portion of the structural housing.
A plate-shaped second metal fitting 42 is attached to the other end of the steel pipe 11 by a second bag nut 17. In the second metal fitting 42, a hole 42A for inserting the steel pipe 11 is formed.
The other end portion of the bending and tensile steel material 10, the second cap nut 17 and the second fitting 42 are embedded in the installation portion H4. In the fourth embodiment, the second cap nut 17 constitutes a second mounted portion of the structural housing.

In the fourth embodiment, the installation portion H4 has a place where the ends of the four bending and tensile steel materials 10 are gathered. In this case, although the plate-shaped first metal fitting 41 or the second metal fitting 42 may be provided for each of the four bending and tensile steel materials 10, 1 for simultaneously locking the ends of the four bending and tensile steel materials 10 Two fittings may be used.
Further, the installation portion H4 may not be a corner portion of the opening W, but may be a pillar C4 facing each other or a beam B4 facing each other. That is, as long as the steel material 1 functions as a brace, the installation location is not limited.

The method of reinforcing a structure using the reinforcement apparatus 400 of 4th Embodiment is demonstrated.
[Steel bar fixing process]
In the factory, a steel bar 12 is inserted into the inside of the steel pipe 11, and a round nut 13 is screwed into each steel bar male screw portion 12A to manufacture a bending tensile steel 10.
The first fitting 41 and the second fitting 42 are embedded in the column C4 and the beam B4, and the space for attaching the mounting nut 15, the first cap nut 16 and the second cap nut 17 and the end of the bending tensile steel 10 A space for inserting a part is formed in advance.

[First locking step]
One end of the steel pipe 11 is inserted into the hole 41A of the first metal fitting 41, and the mounting nut 15 is screwed into the steel pipe male screw part 11A to lock the first metal fitting 41.
[Second locking step]
The other end of the steel pipe 11 is inserted into the hole 42A of the second metal fitting 42, and the second cap nut 17 is screwed into the steel pipe male screw portion 11A to lock the second metal fitting 42.
[Compression process]
Thereafter, the first cap nut 16 is sufficiently screwed into the steel pipe male screw portion 11A. As a result, the steel pipe 11 is compressed by the first cap nut 16 and the second cap nut 17 which are fixing members, and the steel bar 12 is pressed axially inward from the axially outer side.

  In the reinforcing device having the above configuration, when load energy at the time of an emergency such as an earthquake or a storm acts on the column C4 or the beam B4, the tensile force or the tensile force on the bending tensile steel 10 through the first fitting 41 and the second fitting 42 is obtained. Compressive force works. Then, the steel pipe 11 and the steel bar 12 are extended. On the other hand, when a compressive force acts on the steel pipe 11, the steel pipe 11 compresses and deforms within the elastic range, and the compressive force acting on the steel pipe 11 is transmitted to the steel bar 12 via the first bag nut 16 and the round nut 13.

Therefore, in the fourth embodiment, in addition to the same function and effect as (1) of the first embodiment, the following function and effect can be obtained.
(11) In reinforcing the opening W formed of the column C4 and the beam B4, the steel material 1 is bridged over the mutually facing installation portions H4 of the opening W, and the first mounting portion is configured in one of the installation portions H4. In order to embed the first metal fitting 41 and embed the second metal fitting 42 constituting the second mounting portion in the other of the installation portion H4, even if the opening W is about to be deformed due to an earthquake or the like, the load energy associated with the deformation is Since it will absorb by 1, the opening W of a building can be reinforced effectively.

Note that the present invention is not limited to the above-described embodiment, and modifications, improvements, and the like as long as the object of the present invention can be achieved are included in the present invention.
For example, in the first to third embodiments, the structural body is made of concrete, but the structural body of the present invention is not limited to concrete, and may be a wood or metal structural body .

Furthermore, in the first embodiment and the second embodiment, the reinforcing devices 100 and 200 are configured by including the four steel materials 1, but the number of the steel materials 1 is not limited in the present invention.
Moreover, although it was the structure which reinforces the opening of the building itself to construct in 4th Embodiment, in this invention, it is applicable also when reinforcing the opening of an existing building after building construction.
For example, a reinforcement column made of concrete and a reinforcement beam made of concrete are newly provided at a position other than the window portion of the existing building, and at least one pair of opposing corner portions of the frame structure configured of the reinforcement column and the reinforcement beam. The steel material 1 may be bridged. In this case, a fitting for engaging the steel pipe 11 is provided at the intersection of the reinforcing column and the reinforcing beam.
Furthermore, the second bag nut 17 and the second fixing nut 27 are not limited to those having the functions of both the fixing member and the locking portion, and a nut may be separately provided as the locking portion.

  The present invention can be used for a reinforcement device for reinforcing a structure having a structural frame such as a column or a beam.

  DESCRIPTION OF SYMBOLS 1 ... Steel materials, 10 ... Bending tension steel materials, 11 ... Steel pipe, 12 ... Bar steel, 13 ... Round nut, 15 ... Mounting nut (1st latching | locking part), 16 ... 1st bag nut (fixed member), 17 ... 2nd Cap nut (second locking portion, fixing member), 20: base plate (second mounting portion), 20A: insertion hole, 21: fastener, 22: anchor plate (first mounting portion), 22A: insertion hole 26: first fixing nut (fixing member) 27: second fixing nut (second locking portion, fixing member) 31: fixing plate (first mounting portion) 32: fixing plate (second cover) Mounting part), 41: first fitting (first attached part), 42: second fitting (second attached part), 100, 200, 300, 400: reinforcing device, B1: second precast concrete body (structure Housing), B121 ... rib (first attached portion), B 122 (second attached portion) ... rib, B4 Beams (Structure building frame), C1 ... First precast concrete bodies (structure building frame), C4 ... posts (structural building frame), D ... basic (structural building frame), E ... block (structure building frame), H4 ... installed part, W ... opening

Claims (1)

A method of reinforcing a structure using an apparatus for reinforcing a structure by attaching a steel material to the structure frame,
The apparatus for reinforcing the structure includes the steel material, and a first attached portion and a second attached portion which are provided to be opposed to each other on the structural frame,
The steel is
The steel pipe in which the part of the axial direction both ends side was each attached to the said 1st to-be-attached part and the said 2nd to-be-attached part, and the external thread part was formed in outer periphery,
A steel bar inserted into the steel pipe;
A steel bar fixing nut provided on each end of the steel pipe to fix the steel bar to the steel pipe;
A pair of fixing members for pressing the bar from an axial end toward an axial center via the bar fixing nut ;
A first locking portion attached to the steel pipe and locked to the first mounting portion;
A second locking portion attached to the steel pipe and locked to the second mounting portion;
The first attachment portion and the second attachment portion are locked to a concrete body, the concrete body is a foundation, and the first attachment portion has an anchor plate embedded in the foundation. The second attachment portion has a base plate facing the upper surface of the base, and an insertion hole is formed in the anchor plate for inserting the steel pipe, and the first locking portion is the pair of fixing members One of the fixed members and the one fixed member sandwiching the anchor plate, and the second locking portion is the other of the pair of fixed members. It has a nut disposed between the fixing member and the base plate and screwed to the male screw portion, there is a gap between the nut and the other fixing member, and the steel pipe has strength of the steel bar Higher strength than the rod Is a low yield point than the yield point of the steel pipe,
A steel bar fixing step of inserting the steel bar into the steel pipe and fixing both ends of the steel bar to both ends of the steel pipe;
A first locking step of locking the steel pipe and the first mounted portion at a first locking portion;
A second locking step of tensioning the steel material and locking the steel pipe and the second mounted portion at a second locking portion;
Pressing the bar from both axial ends toward the axial center ;
In the first locking step, the anchor plate is sandwiched between one of the pair of fixing members and the fastener.
After the first locking step, the steel pipe is positioned within the mold by positioning with a positioning plate attached to the end of the steel pipe opposite to the end where the anchor plate is provided. Place concrete slurry in the formwork,
Thereafter, the removable positioning plate from the steel pipe after the concrete slurry became basic by curing,
The second locking step, locking the base plate to an end of the steel pipe in which the positioning plate removed, then filled with grout between the upper surface of the base and the base plate,
The step of pressing the bar steel is carried out after the second locking step, and the other fixing member is screwed into the male screw portion , whereby the steel bar is fixed from the axial direction from both ends by the bar steel fixing nut. A method of reinforcing a structure characterized in that it is pressed toward a central portion .

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