JP2008002136A - Structure plane reinforcing structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a structure plane reinforcing structure achieving a large frontage which is an advantage of a steel rigid frame structure, and a reinforcing structure of a steel rigid frame structure building utilizing the structure plane reinforcing structure. <P>SOLUTION: A reinforced structure plane A is constituted by arranging an additional column 3 close to a column 1 and connecting the column 1 and the additional column 3 by connecting hardware 9 while mounting a beam 7 to the column 1 or the additional column 3 in the steel rigid frame structure building of column superior structure having preset module dimensions, wherein the connecting hardware 9 and the beam 7 are arranged almost at the same height. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a structural reinforcement structure in a steel-framed ramen structure building, and a reinforcing structure of a steel-framed ramen structure building that employs this structural reinforcement structure.

  For example, a steel frame ramen structure building including through columns 1 and 2 and a beam 10 as shown in FIG. 7 is provided. In this steel frame structure building, the through columns 1 and 2 are fixed to the column base 4b of the foundation 4 by inserting anchor bolts 5a through a base plate 6 provided in the column base 1a. In addition, the column base part 4b is comprised integrally through the foundation beam 4c. Joint portions 1b and 2b are formed at positions corresponding to the installation heights of the ceiling beams on each floor of the through pillars 1 and 2, and the through pillars 1 disposed in the X direction using the joint portions 1b and 2b, 2 is a beam 10, and the through columns 1, 1 or the through columns 2, 2 arranged in the Y direction are rigidly joined to each other by the beam 10.

  In the steel frame structure as described above, as a measure for improving the structural safety performance against earthquakes and winds, it is common to increase the outer diameter dimensions of through columns and beams. As a similar measure, a load-bearing panel may be installed between the beam on the second floor and the foundation or between the beams on the upper and lower floors.

  However, when a load-bearing panel is installed, the opening width in the construction surface on which the load-bearing panel is arranged becomes small, and there arises a problem that the advantages of the steel frame ramen structure are lost. In order to solve this problem, a technique described in Patent Document 1 has been proposed.

  The technology of Patent Document 1 is a frame structure of a ramen structure in which a beam on the lower floor and a beam on the upper floor are erected between the through pillars erected on the foundation, and the reinforcing pillar is erected adjacent to the side of the through pillar. The upper and lower ends of the reinforcing column are fixed to the beam on the lower floor and the foundation or the beam on the upper and lower floors, and the adjacent through column and the reinforcing column are connected by a connecting metal fitting. In this technique, the through column has a column winning structure, and the reinforcing column has a beam winning structure.

  The technique of Patent Document 1 has an effect that a large opening can be realized by providing a reinforcing column adjacent to a through column as compared with a structure that reinforces using a load-bearing panel. In addition, by connecting the through-column and the reinforcing beam with the connecting bracket, if a force larger than a certain level is applied to the through-column or the reinforcing column, the connecting bracket can be deformed to absorb this force, and the through-column or the reinforcing column is damaged. Can be prevented.

JP 2004-316175 A

  In the case of the technique of Patent Document 1, a beam is installed between through columns, and the end of a reinforcing beam adjacent to the through column is fixed to the beam. In this structure, when an external force such as an earthquake or wind acts on the building, an extremely large shearing force acts on the part located between the through column and the reinforcing column of the beam compared to other parts of the same beam. Therefore, there is a problem that shear yield tends to occur at a portion between the through column and the reinforcing column before the beam yields. Thus, the reinforcement effect by adding a reinforcement pillar will be suppressed, and there exists a possibility that the performance of an original pillar and a beam cannot fully be exhibited.

  In order to solve the above-mentioned problem, it is only necessary to prevent shear yielding at a portion located between the through column and the reinforcing column in the beam. In this case, it can be coped with by increasing the shear strength of the beam by increasing the thickness of the H-shaped steel web constituting the beam and the beam, or by using a beam made of a high-strength material. However, since the beam is constructed between the through-columns, the cross-sectional shape of the beam and the material cannot be changed partially, and the entire beam is located between the through-column and the reinforcing column after all. It must be a cross-sectional shape or material necessary to prevent the shear yielding of the part. For this reason, the general portion of the beam has an excessive shear strength, which causes a problem of being uneconomical.

  In addition, there is a demand to reinforce by adding a column in a direction perpendicular to the structural surface including the through column and the reinforcing column adjacent to the through column. In this case, it is necessary to arrange the reinforcing beam in a direction orthogonal to the construction surface from the added column and to be configured to be able to bear the horizontal force by rigidly joining the added column and the reinforcing beam. Become. However, in the technique of Patent Document 1, since the relationship between the beam and the reinforcing column is a beam win (a type in which the upper end of the column is joined to the lower end of the continuous beam), the joint between the reinforcing column and the reinforcing beam Since a beam intervenes, it is impossible to form a rigid joint that can be regarded as rigid. Therefore, in the technique of Patent Document 1, it is not possible to expect a reinforcing effect in two directions, ie, the direction of the surface and the direction perpendicular to the surface of the structure, and the surface reinforced by the reinforcing pillars is formed in each direction. There is also a problem that must be done.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a structural reinforcement structure having a reasonable structure that realizes a wide opening width, which is an advantage of a steel frame rigid frame structure, and a reinforcing structure for a steel frame rigid frame structure using the structural reinforcement structure. There is to do.

  In order to solve the above-mentioned problems, a structural reinforcement structure according to the present invention is a steel frame structure having a pre-set module size and having a columnar structure, and an additional column is arranged close to a predetermined column. The predetermined pillar and the additional pillar are connected with a connecting hardware, and a beam is attached to the predetermined pillar or the additional pillar, and the connecting hardware and the beam are arranged at substantially the same height.

  In the above-mentioned structural reinforcement structure, the predetermined column and the additional column each have a column base portion including a base plate for fixing to the foundation, and the side length of the base plate is the predetermined column and the additional column. It is preferable that the distance between the predetermined column and the additional column is substantially equal when they are arranged close to each other.

  In any one of the above-described structural reinforcement structures, it is preferable that at least a part of the connecting hardware for connecting the predetermined column and the additional column is made of an energy absorbing element. In particular, it is preferable that the energy absorbing element is composed of a displacement-dependent damper using a low yield point steel.

  In any one of the above-described structural surface reinforcing structures, it is preferable that the shear strength of the connecting hardware connecting the predetermined column and the additional column is higher than the shear strength of the beams attached to the same structural surface.

  Furthermore, in any one of the above-described structural reinforcement structures, it is preferable that the predetermined pillar and the additional pillar are connected to each other by a connecting hardware added below the connecting hardware for each floor.

  The reinforcing structure of a steel frame structure building according to the present invention is a structure orthogonal to the structural surface between a structural surface of any of the structural surface reinforcing structures and a parallel structural surface adjacent in parallel to the structural surface. A beam in a direction to be arranged is arranged, and the beam is rigidly joined to an additional column constituting the composition surface.

  In the structural surface reinforcing structure according to the present invention, a connecting metal member separate from the beam is arranged between a predetermined column (hereinafter referred to as “column”) and an additional column adjacent to the column, so that the cross-sectional shape of the beam It is possible to independently set the cross-sectional shape and material of the connecting hardware and the material, and the optimum shape and material can be selected for the bending and shearing forces acting on the beam and the connecting hardware. Therefore, an economical construction can be configured.

  In the present invention, since the relationship between the columns and the beams is uniform, the members can be made common by setting the columns and the additional columns to the same shape. Therefore, the reinforcement of the construction surface can be performed economically, and the management of members and the management of construction do not become complicated.

  Furthermore, by making the pillar and the additional pillar the same shape and sharing the members, a frame having a high degree of freedom can be configured using the additional pillar. That is, a cantilever frame is constructed by joining a cantilever beam arranged at the same height as the beam to the upper end portion of the additional column, or the distance between the column and the additional column is set in a direction perpendicular to the configured plane. A frame having a high degree of freedom such as shifting (for the minimum module) can be configured.

  In addition, if the base plate that forms the column base of the column and the additional column has a side length substantially equal to the interval dimension when the column and the additional column are arranged close to each other, these columns and the additional column When fixing the base to the foundation, it is possible to set the distance between the column and the additional column by contacting the base plates with each other, improving workability and shortening the work period. it can.

  In addition, when at least a part of the connecting hardware connecting the pillar and the additional pillar is an energy absorbing element, the energy input to the building can be absorbed when an external force due to an earthquake or wind acts on the building. For this reason, it is possible to suppress deformation of the main frame composed of columns and beams within the range of elastic deformation or within the range of slight plastic deformation. And when receiving a very large external force, the structural safety performance of the building can be restored to the initial performance by exchanging the connecting hardware.

  In particular, when the energy absorbing element is composed of a displacement-dependent damper using low-yield point steel, plastic deformation occurs in the low-yield point steel in response to interlayer deformation caused by external forces acting on the building. It can absorb energy from wind and wind. This low yield point steel does not change in performance over time and can maintain stable performance over a long period of time.

  In general, beams made of H-shaped steel, which are widely used, are generally designed so that the bending yield precedes the shear yield (so that the shear yield strength exceeds the bending yield strength). By making the shear strength of the connecting member higher than the shear strength of the beam in the structural surface, the connection hardware will not shear yield until the beam is bent and yielded. For this reason, it becomes possible to fully exhibit the reinforcement effect by adding an additional column, and can fully demonstrate the performance of the original column and a beam.

  In addition, when connecting hardware is further added between the pillars and the additional pillars, and each floor is connected with a plurality of connecting hardware, it is possible to reduce the force acting on each connecting hardware, and simplify the connecting hardware. Can be. In particular, by using a part or all of the connecting hardware as a damper, the energy absorption capacity can be increased, and the earthquake resistance and wind resistance of the building can be improved.

  In the reinforcing structure for a steel frame structure building according to the present invention, a direction orthogonal to the surface of the surface reinforcing structure according to any one of claims 1 to 6 and a parallel surface adjacent to the surface. Since the beam is rigidly joined to the additional column that constitutes the above-mentioned structural surface, it is orthogonal only by adding an additional column that becomes an element that hinders the degree of freedom of the plan only in one structural direction. The reinforcing effect in two directions can be exhibited.

  Further, since the reinforcement of the structural surface can be realized without using a load-bearing panel, the opening width of the structural surface can be widened, and the obstruction of the advantages of the steel frame ramen structure can be minimized. In particular, it is possible to realize a wide space with the maximum width of the opening in the construction surface by bringing the column and the additional column close to each other with the minimum dimension of the module set in the building.

  Hereinafter, the best mode of the structural reinforcement structure according to the present invention will be described. The construction surface reinforcing structure of the present invention is such that the construction surface in a steel frame structure with a pillar winning structure having a preset module size is placed close to a predetermined column (column) and an additional column is arranged. Reinforcement is achieved by fully utilizing the advantages of the ramen structure by not providing a load-bearing panel (structural wall).

  In the present invention, the columns and additional columns of the steel frame ramen structure have a column winning margin that joins the ends of the beams to the side surfaces of these columns. Therefore, when an additional column is arranged between the columns, the span of the construction surface where the additional column is arranged is divided by the additional column, and a beam or a connecting hardware is arranged between the columns. It is possible to join columns and additional columns with beams and connecting hardware. Furthermore, since the joint portion of the additional column can be formed at the same height as the joint portion of the column, this reinforcing beam can be used even when a reinforcing beam is attached to the joint portion of the surface perpendicular to the construction surface where the additional column is disposed. Can be joined at the same level as the beam, and reinforcement in the direction orthogonal to the construction surface can be easily realized.

  In addition, the positional relationship between the column on the structural surface to be reinforced and the additional column that is close to the column is not particularly limited, and it is only necessary that the additional column is disposed close to the column in the same structural surface. . That is, when two pillars are arranged on the construction surface to be reinforced, the additional pillar may be arranged between the two pillars and in a position close to one of the two pillars. It suffices if they are arranged outside one of the pillars and in a close position. When an additional column is arranged between two columns, the structure between the columns is divided by the additional column. When the additional column is arranged outside the two columns, the column is also divided by the additional columns. It will not be done.

  In the present invention, the position of the column (predetermined column) in which the additional column is arranged close to each other is not particularly limited, and may be a middle column or an outer column. However, it is essential that the column is composed of a column called a through column or a tube column that is longer than the level of the beam and has a side surface with a junction with the beam.

  Further, the positional relationship between the pillars and the additional pillars and the number of additional pillars to be used are not particularly limited, and the necessary number may be disposed at a position where reinforcement is required as a result of a predetermined structural calculation.

  The cross-sectional shape and dimensions of the additional pillar are not particularly limited. However, it preferably has the same cross-sectional shape and dimensions as the pillar, including the shape of the joint. In this way, by making the columns and the additional columns the same, it is possible to prevent the number of member types from being increased, and the management of members and construction management from becoming complicated.

  The interval when the columns and the additional columns are arranged close to each other is not particularly limited, but is preferably the minimum dimension of the module set in the building. Thus, by making the pillar and the additional pillar close to each other with the minimum module size, it is possible to secure a wide opening width and realize reinforcement of the construction surface.

  The structure and shape of the connecting hardware that connects the column and the additional column are not particularly limited, but when an external force is applied to the building due to an earthquake or wind, the shear force is superior to bending, so it is particularly resistant to the shear force. It is preferable to configure so as to be able to. By configuring the connecting hardware in this way, it is possible to synchronize the bending yield of the beam and the shear yield of the connecting hardware.

  Further, it is preferable that at least a part of the connection hardware is an energy absorbing element (hereinafter referred to as “damper”) so that the energy acting can be absorbed. When a part of the connection hardware is used as a damper, the structure of the damper is not particularly limited, and a speed-dependent damper using an oil damper or a viscoelastic body, or a displacement-dependent type using a low yield point steel for the connection part. It is possible to selectively use a damper or the like.

  In particular, when the connecting hardware is constructed using low yield point steel, this low yield point steel has a high deformation capacity, so when a large shear force is applied, the low yield point steel is selected according to the applied shear force. Is preferable because it can be plasticized to stably absorb energy and can exhibit stable performance without causing a change in diameter.

  Next, the structural reinforcement structure according to the present embodiment will be described with reference to the drawings. FIG. 1 is a front view for explaining the structure of a structural surface reinforced with additional pillars and connecting hardware. FIG. 2 is a plan view for explaining the arrangement of pillars and beams of a building reinforced with a structural reinforcement structure and a front view of the reinforced structural surface. FIG. 3 is a diagram for explaining the structure of the connecting hardware and the state in which the pillar and the additional pillar are connected by the connecting hardware. FIG. 4 is a diagram for explaining another example of the structure of the connecting hardware.

  The building shown in FIGS. 1 and 2 is configured as a three-story building, and the reinforcing structural surface A of the present embodiment is configured along the X direction in FIG. 2, and a new structural surface B is configured in the Y direction. The reinforcing structure in which the X-Y directions of the steel frame structure building of the embodiment are reinforced is configured.

  Pillars 1 and 2 serving as predetermined pillars are disposed at both ends of the reinforcing structural surface A, and the pillars 1 and 2 are configured as continuous pillars from the first floor to the uppermost floor (third floor). For ease of explanation, the columns arranged on both sides of the reinforcing structural surface A are the columns 1 and 2, but both have the same configuration.

  An additional column 3 is arranged in the vicinity of one column 1 (the right side in the figure) on the reinforcing structural surface A. The additional pillar 3 has a length corresponding to the height of the construction surface to be reinforced (hierarchy, the height corresponding to the ceiling beam on the second floor in this embodiment), and is set as a building with respect to the pillar 1 Proximity with minimum module dimensions. In the present embodiment, the module dimension set in the building is 305 mm, and therefore, the distance between the cores 1 and 2 arranged close to each other is set to 305 mm.

  The lower ends of the columns 1 and 2 and the additional column 3 are fixed to the foundation 4. The foundation 4 includes a continuous column base 4a having an anchor bolt 5a for fixing the column 1 and the additional column 3, a column base 4b having an anchor bolt 5a for fixing the column 2, and a continuous column base 4a. And a foundation beam 4c that joins the column base 4b, and is joined to each other by a reinforcing bar (not shown) embedded in the foundation 4.

  Column legs 1 a to 3 a for fixing to the anchor bolts 5 a of the foundation 4 are formed at the lower ends of the columns 1, 2 and the additional column 3. The column bases 1a to 3a have a base plate 6 made of a rectangular steel plate whose side length is equal to the distance between the column 1 and the additional column 3 (minimum module size). It is configured by welding to the lower end portion of the additional column 3.

  Further, in the columns 1 and 2 and the additional column 3, joint portions 1 b to 3 b for joining to beams and connecting hardware are formed at portions corresponding to the installation heights of the ceiling beams on each floor. The joint portions 1b to 3b are configured by forming a plurality of screw holes on all the side surfaces according to the installation height of the ceiling beam on each floor in each of the columns 1 to 3. When there is a possibility that the thickness of the square steel pipes constituting each of the pillars 1 to 3 is insufficient, insert a steel plate into the square steel pipe to reinforce it, or to increase the square thickness with the same outer diameter. It is preferable to configure the joints 1b to 3b using a steel pipe. In particular, when a thick square steel pipe is used to form the joints 1b to 3b, the specifications of the pillars 1 to 3 are provided at both ends of the thick square steel pipe (however, only the lower end is the uppermost part). Each column 1 to 3 can be configured by welding a square steel pipe having the same.

  Between the column 2 and the additional column 3, a beam 7 having end plates 7a provided at both ends is disposed. The end plate 7a is brought into contact with the joints 2b and 3b of the column 2 and the additional column 3. Are rigidly joined (see FIG. 3) by bolts 8a and nuts 8b. Thus, the beam 7 is joined to the side surfaces of the pillar 2 and the additional pillar 3 as a pillar winning structure.

  A connecting hardware 9 is disposed between the additional pillar 3 and the pillar 1 and at substantially the same height as the beam 7, and a bolt 8 a and a nut 8 b are connected to the joints 1 b and 3 b of the pillar 1 and the additional pillar 3. Thus, the pillar 1 and the additional pillar 3 are connected by the connecting hardware 9.

  Further, beams 10 are arranged on the columns 1 and 2 constituting the reinforcing structural surface A in a direction orthogonal to the reinforcing structural surface A, and the adjacent columns 1 and 2 are rigidly joined via the beam 10. As a result, a steel frame ramen structure building is constructed.

  The connecting hardware 9 of this embodiment is configured to have a shear strength that can sufficiently counteract the shearing force acting between the column 1 and the additional column 3 when an external force is applied to the building due to an earthquake or wind. Yes. For this reason, the connecting hardware 9 has a pair of T-shapes including a fixing piece 9a fixed to the joints 1b and 3b of the pillar 1 and the additional pillar 3, and a connecting piece 9b provided upright from the fixing piece 9a. It is composed of mold hardware. Then, the connecting pieces 9b are overlapped and fastened with bolts 11a and nuts 11b, and the fixing pieces 9a are fixed to the joints 1b and 3b with bolts 8a and nuts 8b, thereby connecting the pillars 1 and the additional pillars 3 to each other. ing.

  In the connection hardware 9 configured as described above, the conditions such as the material, thickness, cross-sectional area, etc. of the connection piece 9b are independently set regardless of the specifications of the beam 7 and the thickness of the web. It is possible to counteract the shear force assumed in the design stage, and to realize a shear yield in harmony with the bending yield of the beam 7.

  Therefore, when a large external force acts on the building due to an earthquake or wind, a bending acts on the beam 7 along with this external force, and when a shearing force acts on the coupling hardware 9, the shearing of the coupling hardware 9 until the beam 7 bends and yields. It is possible to prevent yielding. That is, the reinforcing effect by adding the additional pillar 3 can be sufficiently exhibited, and the original performances of the pillars 1, 2, the additional pillar 3, and the beam 7 can be sufficiently exhibited and used. It becomes possible.

  The connection hardware is not limited to the above-described connection hardware 9, and it is also possible to use one configured as shown in FIGS. 4 (a) and 4 (b).

  That is, the connecting hardware 21 shown in FIG. 5A is inserted between the standing piece 21b and the pair of fixing members 21c having the fixing piece 21a and the two standing pieces 21b that are raised from the fixing piece 21a. The connecting plate 21d. The connecting plate 21d is made of low yield point steel, and is connected to the standing piece 21b of the fixing member 21c by bolts and nuts (not shown), thereby forming the connecting hardware 21.

  Further, the connecting hardware 22 shown in FIG. 5B is arranged so as to be sandwiched between a pair of fixing members 22c each having a fixing piece 22a and an upright piece 22b erected from the fixing piece 22a, and both sides of the upright piece 22b in the thickness direction. And two connecting plates 22d. The connecting plate 22d is made of low yield point steel, and is connected to the standing piece 22b of the fixing member 22c by bolts and nuts (not shown), thereby forming the connecting hardware 22.

  In the connection hardware 21 and 22 configured as described above, the connection plates 21d and 22d made of low yield point steel can function as a displacement-dependent damper. For this reason, it is possible to absorb a large shearing force acting when an external force due to an earthquake or wind acts on the building by plasticizing the connecting plates 21d and 22d. In such a low yield point steel, the performance does not deteriorate with time, and it is possible to exhibit a stable energy absorption ability over a long period of time.

  Therefore, when a large external force acts on the building due to an earthquake or a wind, and a shearing force acts on the connecting hardware 21 or the connecting hardware 22 in accordance with the external force, the connecting plate 21d or the connecting plate 22d is seated according to the applied shearing force. It is possible to plasticize without bending, thereby absorbing energy. When the connecting plate 21d or 22d is plasticized, it is possible to restore the initial performance by exchanging them.

  In the present embodiment, the additional pillar 3 is installed up to the second floor with respect to the three-story building. However, the present invention is not limited to this configuration, and it may be arranged from the first floor to the top floor. You may arrange only on the floor of the low-rise part which tends to become large.

  Further, the structural reinforcement structure does not need to be applied to all the structural surfaces constituting the building, and may be selectively applied to the structural surfaces necessary for structural strength.

  Next, the structural reinforcement structure according to the second embodiment will be described with reference to FIG. In the present embodiment, the connecting hardware 9 is arranged at a height substantially equal to the height at which the beam 7 is joined between the column 1 and the additional column 3, and a plurality of parts are also provided at portions different from the height at which the beam 7 is joined. The connecting hardware 9 is arranged to connect the pillar 1 and the additional pillar 3 together.

  As described above, it is possible to further improve the reinforcing effect by arranging and connecting the connection hardware 9 between the pillar 1 and the additional pillar 3 at a part other than the joint part of the beam 7. In this way, by increasing the number of connecting hardware 9, it is possible to reduce the force borne by one connecting hardware 9. For this reason, it becomes possible to make the connection piece 9b of the connection hardware 9 thin, or to change the material, and to reduce the performance per connection hardware.

  When the pillar 1 and the additional pillar 3 are connected by the plurality of connecting hardware 9 as described above, the number of the connecting hardware 9 is not limited, and other than the connecting hardware 9 arranged at the substantially same height as the beam 7. It is possible to use two or three connecting hardware 9.

  When the connection hardware 21 or the connection hardware 22 is used instead of the connection hardware 9, the number of the connection plates 21d or the connection plates 22d increases, and the total energy that can be absorbed increases. Therefore, it is possible to improve the reinforcing effect as in the case where the number of connecting hardware 9 is increased.

  Next, the reinforcement structure of a steel frame structure building will be described with reference to FIGS. The reinforcing structure of the present embodiment has columns 1 and 2 and reinforces the reinforcing structural surface A by the additional columns 3 and also reinforces the direction orthogonal to the reinforcing structural surface A.

  The steel frame structure shown in FIG. 2 or 6 (a) to 6 (c) is provided with a reinforcing structural surface A in which an additional column 3 is disposed close to the column 1 and reinforced by the beam 7 and the connecting hardware 9. The reinforcing beam 31 is disposed so as to be orthogonal to the reinforcing structural surface A between the reinforcing structural surface A and the structural surface disposed in parallel, and the end portion of the reinforcing beam 31 as shown in FIG. Is rigidly joined to the additional column 3. By adopting such a frame, a new structural surface B is formed in a direction orthogonal to the reinforcing structural surface A by the additional pillar 3 and the reinforcing beam 31, and reinforcement in a direction orthogonal to the reinforcing structural surface A is performed.

  As described above, it is possible to reinforce the building two-dimensionally by a simple method of adding the reinforcing beam 31 to the reinforcing structural surface A reinforced by the additional pillar 3 and the connecting hardware 9. In particular, in the building shown in FIG. 6A, the reinforcement can be performed without narrowing the effective opening width in the direction orthogonal to the reinforcement structural surface A at all.

  In general, a foundation beam (4c) is arranged immediately below the beam (large beam 10) joined to the column 1 to increase the rigidity of the structural surface. However, in the reinforcing structure according to the present invention, the reinforcing beam is used. No foundation beam is arranged immediately below 31. This is because both the anchor bolt 5a for fixing the column 1 and the anchor bolt 5a for fixing the additional column 3 are fixed to the column base (4b) as described above. This is because the substantially rectangular hoop muscle is integrally formed so that the rigidity of the newly formed structural surface by the reinforcing beam 31 can be sufficiently secured without providing a foundation beam.

  In the steel frame structure shown in FIG. 2, the same structural surface is arranged in parallel, and both ends of the reinforcing beam 31 are rigidly joined to the additional columns 3, and the reinforcing beam 31 is aligned in a straight line over the entire length of the building. They are arranged continuously. However, the reinforcing structure according to the present invention is not limited to such a configuration. For example, as shown in FIG. 6B, the additional pillar 3 and the connecting hardware 9 are reinforced only on a part of the construction surface, and the additional pillar 3 is interposed between the additional pillar 3 and the beam 10 of the construction surface that is not reinforced. The reinforcing beam 31 may be arranged with only the joint 3 being rigid, and the reinforcing beam 31 may be arranged on a part of the entire length of the building or on a different line.

  Further, the additional pillar 3 is not necessarily arranged between the pillars 1 and 2 and can be disposed outside the pillar 1 as shown in FIG. 6C, for example. In the building shown in the figure, on the same side of two adjacent construction surfaces in the X direction, a continuous column base (not shown), additional pillars 3 and connecting hardware 9 are partially projected from the building before reinforcement. A reinforcing structure is configured, and the additional pillars 3 are connected by a reinforcing beam 31 to configure a reinforcing structure.

  In this embodiment, since the steel frame structure is a column winning, the reinforcing beam 31 arranged in the direction orthogonal to the reinforcing structural surface A is arranged at substantially the same height as the beam 7 and the end of the additional column 3 is arranged. It becomes possible to join to the joining part 3b.

  Therefore, in addition to the beam 10 joined to the columns 1 and 2, the reinforcing structural surface A is to join the reinforcing beam 31 rigidly to the additional column 3 and to join the reinforcing beam 31 to the adjacent parallel structural surface. Thus, it is possible to reinforce both the target reinforcing structural surface A and the direction orthogonal to the reinforcing structural surface A.

  The above-mentioned structural reinforcement structure according to the present invention changes the standard of a member in a steel frame structure, particularly in a building in which the shape and cross-sectional dimensions of members such as columns and beams are standardized, such as an industrialized house. This is effective when a reinforcing system for a structural frame is constructed by adding a small number of members.

  Further, the reinforcing structure of the steel frame ramen structure building according to the present invention is a structure in which the frontage span constructed in a narrow site is composed of one span as shown in FIG. When the reinforcing structural surface A is applied in the longitudinal direction of the building in a building that tends to have insufficient proof strength, the structural proof strength can be improved without hindering the degree of freedom of the plan, which is particularly effective.

It is a front view explaining the structure of the structural surface reinforced with the additional pillar and the connection metal fitting. It is the top view explaining the arrangement | positioning of the pillar and beam of the building reinforced with the structural reinforcement structure, and the front view of the reinforced structural surface. It is a figure explaining the state which connected the pillar and the additional pillar by the structure of the connection hardware, and this connection hardware. It is a figure explaining the other structural example of a connection metal fitting. It is a figure explaining the surface reinforcement structure which concerns on 2nd Example. It is the top view explaining the arrangement | positioning of the pillar and beam of the building reinforced with the structural reinforcement structure, and the front view of the reinforced structural surface. It is a figure which illustrates typically the conventional steel frame ramen structure.

Explanation of symbols

A Reinforced structural surface B New structural surface 1, 2 Column 3 Additional column 1a-3a Column base 1b-3b Joint 4 Foundation 4a Continuous column base 4b Column base 4c Foundation beam 5a Anchor bolt 6 Base plate 7 Beam 7a End plate 8a Bolt 8b Nut 9 Connecting metal 9a Fixing piece 9b Connecting piece 10 Beam 11a Bolt 11b Nut 21, 22 Connecting metal 21a, 22a Fixing piece 21b, 22b Standing piece 21c, 22c Fixing member 21d, 22d Connecting plate 31 Reinforcing plate 31

Claims (7)

In a steel frame structure building having a pre-set module size and having a column winning structure, an additional column is arranged close to a predetermined column, and the predetermined column and the additional column are connected by a connecting hardware and the predetermined column is connected. A structural reinforcement structure characterized in that a beam is attached to a column or an additional column, and the connecting hardware and the beam are arranged at substantially the same height. The predetermined column and the additional column each have a column base portion including a base plate for fixing to the foundation, and the side length of the base plate is a predetermined value when the predetermined column and the additional column are arranged close to each other. The structural reinforcement structure according to claim 1, which is substantially equal to a distance between the column and the additional column. The structural reinforcement structure according to claim 1 or 2, wherein at least a part of the connecting hardware connecting the predetermined pillar and the additional pillar is composed of an energy absorbing element. The structural reinforcement structure according to claim 3, wherein the energy absorbing element is made of a displacement-dependent damper using a low yield point steel. The structural reinforcement according to any one of claims 1 to 4, wherein a shear strength of a connecting hardware for connecting the predetermined pillar and the additional pillar is higher than a shear strength of a beam attached to the same structural surface. Construction. The structural reinforcement structure according to any one of claims 1 to 5, wherein the predetermined pillar and the additional pillar are connected to each other by a connecting hardware added below the connecting hardware for each floor. . A beam in a direction perpendicular to the surface is disposed between the surface of the surface reinforcing structure according to any one of claims 1 to 6 and a parallel surface adjacent to and parallel to the surface. The reinforcing structure of a steel frame structure building, wherein the beam is rigidly joined to an additional column constituting the surface.

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