JP4286239B2 - Beams and steel structures using beams - Google Patents

Description

  The present invention relates to a beam material used by being connected to a beam material connecting portion (panel zone) in a steel pipe column (post) of a steel structure, for example, and a steel structure using the beam material.

Conventionally, the following configurations are provided as this type of beam material. That is, as a beam (beam material), I-shaped steel (H-shaped steel) composed of a pair of upper and lower flanges and a web portion is used (for example, see Patent Document 1).
Japanese Patent Laid-Open No. 9-111182 (page 2-3, FIG. 1) JP-A-5-148894 (2nd page, FIG. 1)

  According to the above-described conventional configuration, for example, I-type steel (H-type steel) having a flange plate thickness of 22 mm, a web portion plate thickness of 12 mm, a flange width of 250 mm, and a height between outer surfaces of both flanges of 600 mm is employed. In some cases, the structure of [flange plate thickness> web portion plate thickness], that is, by forming the web portion thin, it is possible to ensure a predetermined (standard) strength while reducing the weight of the material used.

  However, according to the above-described conventional configuration, when it is attempted to increase the bending moment value or improve the strength in order to reduce the roll, the thickness of the web portion must be increased and used. The steel material becomes heavy and the material cost becomes high.

Accordingly, an object of the present invention is to provide a beam material capable of increasing the bending moment value without increasing the weight of the steel material to be used.
Further, the invention described in claim 7 aims to provide a steel structure using a beam material that can increase a bending moment value or reduce a roll without increasing the weight of the beam material. .

In order to achieve the above-mentioned object, a beam material according to claim 1 of the present invention is a pair of left and right flanges connected in a right-angled upward direction from the left and right side ends of the lower flange portion via a corner portion. and the web portion, Ri Do from the upper flange portion provided continuously sideways right angles through the corner portion from the upper end of at least one of the web portion, the plate thickness of the flange portion, etc. thickness like the thickness of the web portion or as well as thin, the left and right portions of the sum of the thickness of the web portion, in which a feature that you have to thin the thickness of the flange portion.

Therefore, according to the first aspect of the present invention, the beam material is formed in a U-shaped frame shape having a laterally upward upper flange portion at the upper end, so that the I-shaped steel (H-shaped steel) Compared to the type, the steel material used can be suitably formed without increasing the weight, and the bending moment value can be increased.

  Further, in the beam material according to claim 2 of the present invention, in the configuration according to claim 1 described above, the upper flange portion is continuously provided from the upper ends of the both web portions in a transverse direction perpendicular to each other. It is a feature.

  Therefore, according to the invention of claim 2, the beam member is formed in a U-shaped frame shape having an upper lateral flange portion at the upper end, so that the I-shaped steel (H-shaped steel) is obtained by the reinforcing action by the pair of left and right web portions. Compared to the above type, the steel material used can be formed without increasing the weight, and the bending moment value can be increased.

  The beam member according to claim 3 of the present invention is characterized in that, in the configuration according to claim 1, the upper flange portions are respectively connected in a right-angled manner in the lateral direction from the upper ends of both web portions. It is what.

  Therefore, according to the invention of claim 3, the beam material is formed in a U-shaped frame shape having an outwardly upward flange portion and an inwardly upward flange portion at the upper end. Compared to the type of I-shaped steel (H-shaped steel), the steel material used can be formed without increasing the weight, and the bending moment value can be increased. In addition, the beam material can be welded in a state of being eccentric with respect to the beam material connecting portion of the steel pipe column, so that a portion corresponding to the outer wall in the steel structure can be configured.

  Furthermore, the beam material according to claim 4 of the present invention is characterized in that, in the configuration according to claim 1 described above, the upper flange portion from the upper end of one of the web portions is connected in a laterally right-angled manner outwardly. It is what.

  Therefore, according to the invention of claim 4, the beam material is formed in a U-shaped frame shape having an outwardly upward flange portion at the upper end, so that the I-shaped steel (H-shaped steel) is strengthened by a pair of left and right web portions. Compared to the type, the steel material used can be formed without increasing the weight, and the bending moment value can be increased. Furthermore, the beam material can be welded and joined in a state of being eccentric with respect to the beam material connecting portion of the steel pipe column, so that a portion corresponding to the outer wall in the steel structure can be configured.

Further, the beam material according to claim 5 of the present invention is the structure according to any one of claims 1 to 4 , wherein the upper and lower flange portions are in relation to the outer width between the outer surfaces of the left and right web portions. The height dimension between the outer surfaces of each is formed equal or longer.

Therefore, according to the invention of claim 5 , the bending moment value can be further increased by forming the beam material in a rectangular U-shaped frame shape that is long in the vertical direction.
And the beam material of Claim 6 of this invention formed the recessed part group or the convex part group in the inner surface of the right and left web part in the structure of any one of above-mentioned Claims 1-5. It is characterized by.

Therefore, according to the sixth aspect of the present invention, when concrete or reinforced concrete is placed in the recess that is the internal space of the beam material, the concrete enters the concave portion group, or the convex portion group enters the concrete.

Furthermore, the steel structure using the beam material according to claim 7 of the present invention is a pair of left and right beams that are formed by connecting the beam material to the lower flange portion and the right and left ends of the lower flange portion through the corner portion so as to be perpendicular to each other. And a U-shaped frame having a laterally upward upper flange part at the upper end thereof, and an upper flange part provided in a laterally perpendicular manner from the upper end of at least one of the web parts through a corner part , The thickness of the web portion is equal to or smaller than the thickness of the flange portion, and the thickness of the flange portion is made thin relative to the added value of the thicknesses of the left and right web portions. This is characterized in that it is configured by connecting the end portion of this to the beam material connecting portion of the steel pipe column.

Therefore, according to the invention of claim 7 , the steel structure is made of I-shaped steel (H) by using a U-shaped frame-shaped beam member having a horizontal upper flange portion at the upper end and reinforced by left and right web portions. Compared to the type using the beam material), the steel material can be suitably configured without increasing the weight of the steel material used, and the bending moment value can be increased to ensure the predetermined (standard) strength, Furthermore, it can be set as the structure which reduced rolling.

The steel structure using a beam material according to claim 8 of the present invention is the structure according to claim 7 , wherein the beam material is connected to the beam material connecting portion by welding connection, and the free ends of the beam material are connected. Are connected via a bracket and a connector.

Therefore, according to the invention of claim 8, the connection of the beam material to the beam material connecting portion can be performed firmly and surely by welding connection, and the connection in the length direction of the beam material extends between the adjacent beam materials. This can be done by bringing the bracket into contact with each other and coupling the connector from the bracket to the beam.

A steel structure using a beam material according to claim 9 of the present invention is characterized in that, in the configuration according to claim 7 or 8 , concrete is placed in a recess of the beam material.

Therefore, according to the invention of claim 9 , the strength and the like can be further improved by placing the concrete using the internal space of the beam material.
Furthermore, the steel structure using the beam material according to claim 10 of the present invention is characterized in that, in the configuration according to claim 7 or 8 , reinforced concrete is placed in the recess of the beam material.

Therefore, according to the invention of claim 10 , the strength and the like can be further improved by placing the reinforced concrete using the internal space of the beam material.
Moreover, the steel structure using the beam material according to claim 11 of the present invention is the structure according to claim 9 or 10 , wherein the beam material forms a concave group or a convex group on the inner side surface of the left and right web portions. It is characterized by that.

Therefore, according to the invention of claim 11 , when concrete or reinforced concrete is placed in the recess that is the internal space of the beam material, the concrete enters the concave group, or the convex group enters the concrete, The left and right web portions can be integrated with concrete or reinforced concrete.

According to the first aspect of the present invention described above, the beam member is formed in a U-shaped frame shape having a laterally upward upper flange portion at the upper end, and therefore, by the reinforcing action by the pair of left and right web portions, ), The steel material used can be formed firmly and suitably without increasing the weight of the steel material, that is, without increasing the material cost, and the bending moment value can be increased.

  According to the second aspect of the present invention described above, the beam member is formed in a U-shaped frame shape having an upper flange portion facing outwardly at the upper end, so that the I-shaped steel ( Compared to the H-type steel), the steel material used can be formed firmly without increasing the weight of the steel material, that is, without increasing the material cost, and the bending moment value can be increased. Enough strength can be secured.

  According to claim 3 of the present invention described above, the beam member is formed in a U-shaped frame shape having an outwardly upward flange portion and an inwardly upward flange portion at the upper end, thereby reinforcing the pair of left and right web portions. Due to the action, the steel material used can be firmly formed without increasing the weight of the steel material, that is, without increasing the material cost, and the bending moment value can be increased as compared with the type of I-shaped steel (H-shaped steel). Therefore, it is possible to sufficiently secure a predetermined (standard) strength. In addition, since the beam material can be welded in a state of being eccentric with respect to the beam material connecting portion of the steel pipe column, a portion corresponding to the outer wall in the steel structure can be easily configured.

  Further, according to the fourth aspect of the present invention, the beam member is formed in a U-shaped frame shape having an outwardly upward flange portion at the upper end, so that the I-shaped steel (H Compared to the type of steel), the steel material used can be formed firmly without increasing the weight of the steel material, that is, without increasing the material cost, and the bending moment value can be increased. Etc. can be secured sufficiently. Further, since the beam material can be welded and joined in a state of being eccentric with respect to the beam material connecting portion of the steel pipe column, a portion corresponding to the outer wall in the steel structure can be easily configured.

According to the fifth aspect of the present invention, the bending moment value can be further increased by forming the beam material in a rectangular U-shaped frame shape that is long in the vertical direction.
According to the sixth aspect of the present invention described above, when concrete or reinforced concrete is placed in the recess that is the internal space of the beam material, the concrete enters the concave group, or the convex group enters the concrete. As a result, the left and right web portions can be integrated with concrete or reinforced concrete, so that a solid beam can be obtained.

According to the seventh aspect of the present invention described above, the steel structure is formed by using a U-shaped frame-shaped beam member having a horizontal upper flange portion at the upper end and reinforced by left and right web portions. Compared to the type using a beam of type steel (H-type steel), the steel material to be used can be firmly and suitably configured without increasing the weight of the steel material, that is, without increasing the material cost, and the bending moment value can be increased. A predetermined (standard) strength and the like can be sufficiently ensured, and the roll can be reduced.

According to claim 8 of the present invention described above, the connection of the beam material to the beam material connecting portion can be performed firmly and reliably by welding connection, and the connection in the length direction of the beam material is adjacent. By bringing the brackets into contact with each other between the beam members and coupling the coupling tool from the brackets to the beam members, it can be performed firmly and reliably.

According to the ninth aspect of the present invention, the strength and the like can be further improved by placing the concrete using the internal space of the beam material.
Furthermore, according to claim 10 of the present invention described above, the strength and the like can be further improved by placing the reinforced concrete using the internal space of the beam material.

In addition, according to the eleventh aspect of the present invention, when concrete or reinforced concrete is placed in the recess that is the internal space of the beam material, the concrete enters the concave group, or the convex group enters the concrete. Thus, the left and right web portions and the concrete or reinforced concrete can be integrated, and thus can be firmly coupled to further improve the strength . The beam members by this, and the thickness of the left and right of the web portion is thinner, while can be formed without increase the weight of the materials used, it is possible to ensure sufficient strength, both web portion is deformation Can be prevented.

[Embodiment 1]
Below, Embodiment 1 of this invention is demonstrated based on FIGS.
As shown in FIG. 1 and FIG. 2, the beam member 10 is made of a steel plate, and is provided with a lower flange portion 11, and left and right continuous from the left and right ends of the lower flange portion 11 through a corner portion 12. A pair of web portions 13 and an upper flange portion 15 that is connected to the outer flanges (directions different from each other) from the upper ends of both web portions 13 toward the outside direction (directions different from each other) are formed on the upper surface side. It is formed in a U-shaped frame shape having a recess 16 that is open at both ends in the vertical direction and having an upper flange portion 15 that faces outward at the upper end. At that time, the four corner portions 12 and 14 are bent and formed with an outer surface R-shaped radius of curvature.

Here, in the beam member 10, the plate thickness T ₁ of the lower flange portion 11 is equal to or thinner than the plate thickness T ₂ of the left and right upper flange portions 15, and [T ₂ ≧ T ₁ ] is formed. , 11, the plate thickness t of the left and right web portions 13 is equal or thinner than the plate thicknesses T ₂ and T ₁ [T ₂ ≧ T ₁ ≧ t]. The beam member 10 is formed so that the width W ₂ of the left and right upper flange portions 15 is equal [W ₂ ≈W ₂ ], and the lower flange portion is equal to the added value of the width W ₂ of the both upper flange portions 15. 11 width W ₁ is formed in an equivalent shape [W ₂ + W ₂ ≈W ₁ ]. Furthermore, the height outer dimension H between the outer surfaces of the upper and lower flange portions 11 and 15 is equal to or longer than the width W ₁ of the lower flange portion 11 corresponding to the width outer dimension between the outer surfaces of the left and right web portions 13. [W ₂ + W ₂ ≈W ₁ ≦ H] is formed.

As the beam member 10, for example, the thickness t of the web portion 13 is 6 mm to 22 mm, the thicknesses T ₁ and T ₂ of the flange portions 11 and 15 are 9 mm to 40 mm, and the width W ₂ of the upper flange portions 15 is added. The value [W ₂ + W ₂ ] and the width outer dimension W ₁ between the outer surfaces of both web portions 13 are 150 mm to 500 mm, and the height outer dimension H between the outer surfaces of the upper and lower flange portions 11 and 15 is 200 mm to 1000 mm. Yes. Accordingly, the plate thicknesses T ₁ and T _{2 of} the flange portions 11 and 15 are formed as thin as 9 mm to 40 mm with respect to 12 mm to 44 mm, which is the added value 2t of the plate thickness t of the left and right web portions 13, and the width is outside The outer height H of 200 mm to 1000 mm is formed longer than the dimension W ₁ of 150 mm to 500 mm.

  Therefore, the beam member 10 is formed in a U-shaped frame shape having an outer flange 15 on the upper side at the upper end, so that the reinforcing action by the pair of left and right web parts 13 is compared with the type of I-shaped steel (H-shaped steel). The steel material used can be firmly formed without increasing the weight of the steel material, that is, without increasing the material cost, and the bending moment value can be increased.

  The beam member 10 configured as described above is used as a part of a steel structure. That is, as shown in FIGS. 3 to 5, the steel structure 1 includes a rectangular steel pipe column 2 and a beam member 10 connected to a beam member connecting portion (panel zone) of the steel tube column 2. The steel pipe column 2 is constituted by a long square steel pipe (long column) 3 and a short beam steel connecting square steel pipe (beam material connecting portion) 4, and the steel pipe column 2 has a length direction. Are cut (divided) into a group of long rectangular steel pipes 3 and a group of rectangular steel pipes 4 for connecting beam members.

  The lower end of the lower rectangular steel pipe 3 is welded to the lower end of the beam-connecting rectangular steel pipe 4 by a butting method, and the upper long rectangular steel pipe 4 is connected to the upper end of the beam-connecting rectangular steel pipe 4. 3 is welded 5a. In addition, the backing material 6a is interposed on the inner surface side of the long rectangular steel pipe 3 when performing the welding connection 5a. The connection of the beam member 10 to the steel pipe column 2 formed in this way is performed by welding the end portion (free end) of the beam member 10 to the beam member connecting rectangular steel tube 4 by welding. A backing material is interposed as necessary when the welding connection 5b is performed. Note that a short beam member 10 may be welded 5b in advance to the beam member connecting rectangular steel tube 4 before being welded to the long rectangular steel tube 3.

  Further, the connection between the free ends of the beam member 10, that is, the connection in the length direction of the beam member 10 having a predetermined length with respect to the free end of the short beam member 10, is performed by the web portion 13 adjacent in the length direction. A steel plate-like bracket 7A is brought into contact between the outer surfaces, and the connecting tool 8A is coupled to the web portion 13 from the bracket 7A, and extends between the outer surfaces of the lower flange portions 11 adjacent in the length direction. The steel plate-like bracket 7B is brought into contact with each other, the connecting tool 8B is coupled to the bracket 7B from the lower flange portion 11, and the upper flange portion 15 which is adjacent in the length direction is between the upper surface and the lower surface. The steel plate-like bracket 7 </ b> C is brought into contact with the upper and lower brackets 7 </ b> C to the upper flange portion 15, and the connecting tool 8 </ b> C is coupled.

  In addition, as coupling | bonding by the couplers 8A, 8B, and 8C, it forms from the bracket 7A to the web part 13, from the bracket 7B to the lower flange part 11, or from the upper and lower brackets 7C to the upper flange part 15. An anchor type bolt, a one-side bolt, a screw-type bolt that is screwed into a small-diameter through hole, a rivet, or the like is employed.

  The steel structure 1 configured in this way is made of I-shaped steel (H-shaped steel) by using a beam member 10 formed in a U-shaped frame shape having an upper flange portion 15 facing outward at the upper end. Compared to the type in which the beam material is used, it can be configured without increasing the weight of the steel material to be used, that is, without increasing the material cost, and the bending moment value can be increased to achieve a predetermined (standard) strength. It is possible to secure a sufficient amount and further reduce the roll. Moreover, since the beam member 10 is formed in a rectangular U-shaped frame shape that is long in the vertical direction, the bending moment value can be further increased.

  When the beam member 10 is used for the steel structure 1, the reinforced concrete FC composed of the reinforcing bar F and the concrete C is placed in the recess 16 that is the internal space of the beam member 10, as indicated by the phantom line in FIG. 4. It is installed. Further, a corrugated steel plate-like floor body E is applied to the steel structure 1. That is, the floor body E is placed between the upper flange portions 15, and a floor layer (slab) made of reinforced concrete FC is formed on the upper surface side thereof. A stat bolt B is provided on the upper flange portion 15.

Thus, as the beam member 10, the reinforced concrete FC is placed using the recess 16, so that the strength and the like can be further improved, and the thickness t of the left and right web portions 13 is made thinner. Sufficient strength can be ensured while forming without increasing the weight of the material.
[Embodiment 2]
Next, a second embodiment of the present invention will be described with reference to FIGS.

  That is, as shown in FIGS. 6 and 7, the beam member 10 is formed with a group of convex portions 13 a on the inner side surfaces of the left and right web portions 13. Here, the convex portion 13a group is formed by welding or the like, for example, and the protruding height G is set to 2 mm to 5 mm. As shown in FIG. 8, when the beam member 10 is used for the steel structure 1, a reinforced concrete FC composed of a reinforcing bar F and a concrete C is placed in the recess 16.

  According to the configuration of the second embodiment, the steel structure 1 is formed by using a beam member 10 formed in a U-shaped frame shape having an outer flange 15 at the upper end in the lateral direction. Compared to the type in which the beam material of H-shaped steel is used, it can be constructed without increasing the weight of the steel material used, that is, without increasing the material cost, and the bending moment value can be increased (predetermined) It is possible to secure a sufficient strength and to reduce the roll. Moreover, since the beam member 10 is formed in a rectangular U-shaped frame shape that is long in the vertical direction, the bending moment value can be further increased.

  And as shown in the phantom line of FIG. 8, intensity | strength etc. can be improved further by placing reinforced concrete FC using the recess 16. FIG. At that time, the group of convex portions 13a enters the reinforced concrete FC, and the left and right web portions 13 and the reinforced concrete FC are integrated and thus firmly bonded. As a result, the beam member 10 can secure sufficient strength while reducing the plate thickness t of the left and right web portions 13 without increasing the weight of the material used. 13 can be prevented from being deformed.

In the second embodiment, the inner surface of the left and right web portions 13 has a concave group formed in place of the convex portion 13a group, or a type in which the concave group and the convex portion group are confused. It may be.
[Embodiment 3]
Next, a third embodiment of the present invention will be described with reference to FIGS.

  That is, as shown in FIG. 9 and FIG. 10, the beam member 20 is made of a steel plate, and is continuously connected to the lower flange portion 21 and the right and left side ends of the lower flange portion 21 through the corner portion 22. A pair of left and right web portions 23, and an upper flange portion that is connected to the same direction from the upper end of both web portions 23 in the same direction through the corner portion 24, that is, the corner portion 24 from the upper end of one web portion 23. The outer upper flange portion 25A continuously provided in the right-angled direction toward the outside via the corners 24, and the inner side continuous in the right-angled direction toward the inward direction from the upper end of the other web portion 23 via the corner portion 24. It has a recess 26 in which the upper surface side and both end sides in the length direction are opened by the upward upper flange portion 25B, and has an outward upward flange portion 25A and an inward upward flange portion 25B at the upper end. U-shaped frame shape It is formed. At that time, the four corner portions 22 and 24 are bent with an outer surface R-shaped radius of curvature.

Here the beam member 20, the left and right upper flange portion 25A, the thickness _{T 1} of the lower flange portion 21 is of equal thickness or thinner relative to the thickness _{T 2} of the 25B _{[T 2} ≧ _{T 1]} while being formed, the flange The plate thickness t of the left and right web portions 23 is equal to or thinner than the plate thicknesses T ₂ and T _{1 of the} portions 25A, 25B, and 21 [T ₂ ≧ T ₁ ≧ t]. The beam members 20 has a short width _{W 4} inward on the flange portion 25B with respect to the width _{W 3} of the outward on the flange portion 25A _[W 3> W _4] while being formed, both the upper flange portion 25A, 25B The width W ₁ of the lower flange portion 21 is formed in an equivalent state [W ₃ + W ₄ ≈W ₁ ] with respect to the added value of the widths W ₃ and W ₄ . Furthermore, the width W ₁ of the lower flange portion 21 corresponding to the width outer dimensions between the outer surface of the left and right of the web portion 23, the upper and lower flange portions 25A, 25B, 21 height outer dimensions H between the outer surface of equivalent shape Alternatively, it is long [W ₃ + W ₄ ≈W ₁ ≦ H].

As the beam member 20, for example, the thickness t of the web portion 23 is 6 mm to 22 mm, the thicknesses T ₁ and T _{2 of} the flange portions 21, 25 A and 25 B are 9 mm to 40 mm, and the widths of the upper flange portions 25 A and 25 B. W _3, the sum of _{W 4 [W 3 + W 4} ] and both width dimensions _{W 1} between the outer surface of the web portion 23 150Mm～500mm, upper and lower flange portions 25A, 25B, 21 height outer dimensions between the outer surface of the H is formed to be 200 mm to 1000 mm. Accordingly, the plate thicknesses T ₁ and T _{2 of} the flange portions 25A, 25B, and 21 are formed as thin as 9 mm to 40 mm with respect to 12 mm to 44 mm, which is the added value 2t of the plate thickness t of the left and right web portions 23, and The outer height H of 200 mm to 1000 mm is formed longer than the outer width W ₁ of 150 mm to 500 mm.

  Therefore, the beam member 20 is formed in a U-shaped frame shape having the upper flange portion 25A and the upper flange portion 25B facing outward at the upper end, so that the I-shaped steel (H The steel material used can be firmly formed without increasing the weight of the steel material as compared with the type of steel (ie, without increasing the material cost), and the bending moment value can be increased.

The beam member 20 configured as described above is used as a part of a steel structure. That is, as shown in FIGS. 11 and 12, the steel structure 1 is configured in the same manner as in the first embodiment described above, and at this time, the rectangular steel pipe (beam material coupling portion) 4 for beam material coupling is formed. An end (free end) of the beam member 20 is welded to the pair of opposite outer surfaces. Here the beam member 20 is welded with its U-shaped frame-like portion of the axis (the center of the width Dimensions W ₁₎ is eccentric to the inward onto the flange portion 25B side with respect to the axis of the steel pipe column 2 It is connected 5b. Of the pair of remaining outer surfaces of the beam-connecting rectangular steel pipe 4, the beam member 10 is welded to the outer surface on the side where the beam member 20 is not eccentric in the same manner as in the first embodiment. Has been.

The connection between the free ends of the beam member 20, the placement of the reinforced concrete FC using the recess 26, the construction of the floor body E, and the like are performed in the same manner as in the first embodiment.
The steel structure 1 configured in this way uses the beam member 20 formed in a U-shaped frame shape having an outwardly upward flange portion 25A and an inwardly upward flange portion 25B at the upper end. Compared to the type in which I-shaped steel (H-shaped steel) beam material is used, the steel material to be used can be configured without increasing the weight, that is, without increasing the material cost, and the bending moment value can be increased to be predetermined. (Standard) strength and the like can be sufficiently ensured, and a configuration with reduced roll can be obtained. In addition, since the beam member 20 is formed in a rectangular U-shaped frame shape that is long in the vertical direction, the bending moment value can be further increased.

Then, as shown by the phantom line in FIG. 11, the strength and the like can be further improved by placing the reinforced concrete FC using the recess 16, and the thickness t of the left and right web portions 23 can be further reduced. While forming without increasing the weight of the material used, sufficient strength can be secured. Furthermore, the beam member 20 can be welded and bonded 5b in a state of being eccentric with respect to the beam member connecting rectangular steel pipe (beam member connecting portion) 4 of the steel pipe column 2, thereby easily configuring the portion corresponding to the outer wall in the steel structure 1. Can do.
[Embodiment 4]
Next, a fourth embodiment of the present invention will be described with reference to FIGS.

  That is, as shown in FIG. 13 and FIG. 14, the beam member 30 is made of a steel plate, and is continuously connected to the lower flange portion 31 from the left and right ends of the lower flange portion 31 through the corner portion 32 in a right-angled upward direction. A pair of left and right web portions 33A, 33B and an upward upper flange portion 35 that is connected to the outer side from the upper end of one of the web portions 33A outwardly through the corner portion 34 in a laterally right-angled manner are provided. It is formed in a U-shaped frame shape having a recess 36 open to both ends in the direction and having an outwardly upward flange portion 35 at the upper end. At that time, the three corner portions 32 and 34 are bent and formed with an outer surface R-shaped radius of curvature.

Here, in the beam member 30, the plate thickness T ₁ of the lower flange portion 31 is equal to or thinner than the plate thickness T ₂ of the outward upper flange portion 35 [T ₂ ≧ T ₁ ], and the flange portion 35 is formed. , 31 with respect to the plate thicknesses T ₂ and T ₁ , the plate thickness t of the left and right web portions 33A and 33B is equal or thin [T ₂ ≧ T ₁ ≧ t]. The beam member 30 is formed such that the width W ₅ of the outward upper flange portion 35 is equal to or shorter than the width W ₁ of the lower flange portion 31 [W ₁ ≧ W ₅ ]. Furthermore, the left and right of the web portion 33A, the width W ₁ of the lower flange portion 31 corresponding to the width outer dimensions between the outer surface of the 33B, the height Dimensions H between the outer surface of the upper and lower flange portions 35, 31 is equal shape Alternatively, [W ₁ ≦ H] is formed longer, and the height outer dimension LH of the other web portion 33B is equal to or longer than the height outer dimension H between the outer surfaces of the upper and lower flange portions 35, 31 [ H ≦ LH].

As the beam member 30, for example, the web portions 33A and 33B have a plate thickness t of 6 mm to 22 mm, the flange portions 31 and 35 have a plate thickness T ₁ and T ₂ of 9 mm to 40 mm, and the outward upper flange portion 35 has a width W. ₅ is 200 mm to 600 mm, the width outer dimension W ₁ between the outer surfaces of both web portions 33A, 33B is 150 mm to 500 mm, the height outer dimension H between the outer surfaces of the upper and lower flange portions 35, 31 is 200 mm to 1000 mm, and the other web The height LH of the portion 33B is formed to be 200 mm to 1000 mm. Accordingly, the plate thicknesses T ₁ and T _{2 of} the flange portions 31 and 35 are formed as thin as 9 mm to 40 mm with respect to 12 mm to 44 mm which is the added value 2t of the plate thickness t of the left and right web portions 33A and 33B, and The outer height H of 200 mm to 1000 mm is formed longer than the outer width W ₁ of 150 mm to 500 mm.

  Therefore, the beam member 30 is formed in a U-shaped frame shape having an outwardly upward flange portion 35 at the upper end, so that the beam member 30 is reinforced by the pair of left and right web portions 33A and 33B as compared with the type of I-shaped steel (H-shaped steel). The steel material used can be formed firmly without increasing the weight of the steel material, that is, without increasing the material cost, and the bending moment value can be increased.

The beam member 30 configured in this manner is used as a part of a steel structure. That is, as shown in FIG. 15 and FIG. 16, the steel structure 1 is configured in the same manner as in the first embodiment described above, and at that time, the rectangular steel pipe (beam member connecting portion) 4 for connecting the beam members is formed. An end (free end) of the beam member 30 is welded to the pair of opposite outer surfaces. Here the beam member 30 is welded 5b in a state in which eccentric to the other side with respect to the U-shaped frame-like portion of the axis (width outside the center of the dimension W ₁₎ is the axis of the steel column 2 . Of the pair of remaining outer surfaces of the beam-connecting rectangular steel pipe 4, the beam member 10 is welded to the outer surface on the side where the beam member 20 is not eccentric in the same manner as in the first embodiment. Has been.

  The connection between the free ends of the beam member 30, the placement of the reinforced concrete FC using the recess 36, the construction of the floor body E, and the like are performed in the same manner as in the first embodiment described above. At that time, the other end of the reinforced concrete FC is regulated by the upward projecting portion of the other web portion 33B.

  The steel structure 1 configured as described above uses a beam member 30 formed in a U-shaped frame shape having an outwardly upward flange portion 35 at the upper end, so that a beam of I-shaped steel (H-shaped steel) is used. Compared to the type in which the material is used, it can be configured without increasing the weight of the steel material to be used, that is, without increasing the material cost, and the bending moment value can be increased to sufficiently increase the predetermined (standard) strength. Can be ensured, and the structure can be further reduced in rolling. Moreover, since the beam member 30 is formed in a rectangular U-shaped frame shape that is long in the vertical direction, the bending moment value can be further increased.

Then, as shown by the phantom line in FIG. 15, the strength and the like can be further improved by placing the reinforced concrete FC using the recess 36, and the thickness t of the left and right web portions 33A, 33B can be made thinner. Thus, sufficient strength can be ensured while forming the material used without increasing its weight. Furthermore, the beam member 20 can be welded and bonded 5b in a state of being eccentric with respect to the beam member connecting rectangular steel pipe (beam member connecting portion) 4 of the steel pipe column 2, thereby easily configuring the portion corresponding to the outer wall in the steel structure 1. Can do.
[Embodiment 5]
Next, a fifth embodiment of the present invention will be described with reference to FIG.

That is, modification of FIG. 17 (a) embodiment 1, and FIG. 17 (b) is a modification of the second embodiment, the thickness _{T 3} of the left and right of the web portion 13 of the flange portion 11, 15 The plate thicknesses T ₁ and T ₂ are equal in thickness [T ₂ ≧ T ₁ ≈T ₃ ]. The Figure 17 (c) is a modification of the third embodiment, the thickness _{T 3} is flange 21,25A of the left and right of the web portion 23, the thickness _T 1 of the 25B, _{T 2} and equal Atsujo [T ₂ ≧ T ₁ ≈T ₃ ]. And Figure 17 (d) is a modification of the fourth embodiment, the left and right of the web portion 33A, the thickness _{T 3} of 33B is the plate thickness _T 1, _{T 2} of the flange portion 31, 35 etc. Atsujo [T ₂ ≧ T ₁ ≈T ₃ ].

In the above-described first to fifth embodiments, the beam members 10, 20, and 30 are obtained by cold forming or hot forming from a flat plate state. At that time, the beam members 10, 20, and 30 formed by hot forming are passed through a heating means such as a heating furnace in a flat plate state, and an A ₃ transformation point (for example, 850 to 1050 ° C.) as an example of a predetermined temperature. It is obtained by hot forming by appropriate forming means such as a roll type or a press type after the whole is heated to the vicinity (front and back) of the film. Incidentally, what the entire heating through the heating means, although the vicinity of A ₃ transformation point, which is an example of a predetermined temperature (e.g., from 850 to 1,050 ° C.) (before and after), the heating temperature by the heating means to be arbitrarily set It is. In addition, the manufactured beam members 10, 20, and 30 are transported to a correction device, a front end cutting device, a rear end cutting device, a cleaning device, and a rust prevention device (not shown) as necessary, and are processed by each. The

  In this way, the beam members 10, 20, and 30 that are hot-formed including each corner portion can remove residual stress and restore toughness, and can be made to be homogeneous with almost no twisting, bending, or deformation. These beam members 10, 20, and 30 can be obtained efficiently and inexpensively, so that the steel structure 1 can be constructed at a significant cost reduction. In addition, as the long square steel pipe 3 and the beam steel connecting square steel pipe 4 constituting the steel pipe column 2, either a form using a hot-formed steel pipe, a form using both a cold-formed steel pipe, or either A hot-formed steel pipe may be used, and the other may be a cold-formed steel pipe.

  In the above-described first to fourth embodiments, the form in which the reinforced concrete FC is placed in the recesses 16, 26, 36 of the beam members 10, 20, 30 is shown. , 36 may be of a type in which only concrete C is cast, or a type in which neither reinforced concrete FC or concrete C is cast.

In the first to fourth embodiments described above, as the beam members 10, 20 and 30, than the width outer dimension W ₁ between the outer surface of the left and right of the web portion, long height outer dimensions H between the outer surface of the upper and lower flange portions [W ₁ <H] is formed, and thus is formed in a rectangular U-shaped frame that is long in the vertical direction. This is a rectangular U-shaped frame that is long in the width direction as [W ₁ > H]. It may be formed in a square shape, or may be formed in a square U-shaped frame shape as [W ₁ ≈H].

  In Embodiment 1-4 mentioned above, although the form which carried out the welding connection 5a of the long square steel pipe 3 group and the beam material connection square steel pipe 4 group is shown as the steel pipe pillar 2, this is shown as the steel pipe pillar 2. It may be a form using one.

  In the above-described first to fourth embodiments, the beam member 10 is welded to the square steel pipe (beam member connecting portion) 4 for beam member connection of the steel pipe column 2 by welding, but this is connected via a connector. It may be a format.

In the above-described first to fourth embodiments, a form in which the free ends of the beam member 10 are connected via the bracket 7 and the connector 8 is shown. Good.
In Embodiment 1-4 mentioned above, although the form of a square steel pipe is shown as the steel pipe pillar 2 of the steel structure 1, the steel pipe pillar may be a form of a round steel pipe.

  In the second embodiment described above, the convex portion 13a group is formed on the inner surface of the left and right web portions 13 in the beam member 10 of the first embodiment. Forms in which convex groups and concave groups are formed on the inner surface of the web portion 23, and convex portions and concave groups are formed on the inner surfaces of the left and right web portions 33A and 33B in the beam member 30 of the fourth embodiment. It may be a format.

  In Embodiment 1-4 mentioned above, although the form used by connecting with the steel pipe pillar 2 of the steel structure 1 is shown as beam material 10,20,30, this is construction, such as a pedestrian crossing bridge and a bridge. It is applicable to other structures.

BRIEF DESCRIPTION OF THE DRAWINGS It is Embodiment 1 of this invention, and is a perspective view of the principal part of a beam material. It is a front view of the beam material. It is a partially cutaway perspective view of a steel structure using the beam material. It is a partially cutaway front view of the principal part of the steel frame structure using the beam material. It is a partially notched top view of the principal part of the steel structure using the beam material. FIG. 6 is a perspective view of a main part of a beam member according to a second embodiment of the present invention. It is a front view of the beam material. It is a partially cutaway front view of the principal part of the steel frame structure using the beam material. It is Embodiment 3 of this invention, and is a perspective view of the principal part of a beam material. It is a front view of the beam material. It is a partially cutaway front view of the principal part of the steel frame structure using the beam material. It is a partially notched top view of the principal part of the steel structure using the beam material. It is Embodiment 4 of this invention, and is a perspective view of the principal part of a beam material. It is a front view of the beam material. It is a partially cutaway front view of the principal part of the steel frame structure using the beam material. It is a partially notched top view of the principal part of the steel structure using the beam material. Embodiment 5 of the present invention is shown, in which (a) is a front view of a beam material as a modification of Embodiment 1, (b) is a front view of a beam material as a modification of Embodiment 2, and (c) is an embodiment of the present invention. FIG. 6D is a front view of a beam material according to a modification of the third embodiment, and FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Steel frame structure 2 Steel pipe pillar 3 Long square steel pipe 4 Rectangular steel pipe for beam connection (beam connection part)
5b weld joint 7A bracket 7B bracket 7C bracket 8A connector 8B connector 8C connector 10 beam material 11 lower flange portion 12 corner portion 13 web portion 13a convex portion 14 corner portion 15 upper flange portion 16 recess 20 beam material 21 lower flange Section 22 Corner section 23 Web section 24 Corner section 25A Outward upper flange section 25B Inward upper flange section 26 Recess 30 Beam 31 Lower flange section 32 Corner section 33A Web section 33B Web section 34 Corner section 35 Outward upper flange section 36 Recess t Thickness of web portion T ₁ Thickness of lower flange portion T ₂ Thickness of upper flange portion T ₃ Thickness of web portion W ₁ Width of lower flange portion (outside width between outer surfaces of left and right web portions) Size)
H Height between outer surfaces of upper and lower flanges External dimensions FC Reinforced concrete F Reinforcement C Concrete E Floor

Claims (11)

A lower flange portion, a pair of left and right web portions connected in a right-angled upward direction from the left and right ends of the lower flange portion via a corner portion, and a horizontal right-angle shape from the upper end of at least one web portion via a corner portion Ri Do from the upper flange portion which is continuously provided, the plate thickness of the flange portion, as well as an equal thickness shape or thinner the thickness of the web portion, with respect to the sum of the thickness of the left and right of the web portion, flange beam members characterized that you have to thin the thickness of the parts.   2. The beam material according to claim 1, wherein the upper flange portion is continuously provided in a transverse direction at right angles from the upper ends of both web portions in different directions.   The beam material according to claim 1, wherein the upper flange portion is continuously provided from the upper ends of both web portions in a transverse direction at right angles in the same direction.   The beam material according to claim 1, wherein an upper flange portion is continuously provided from the upper end of one of the web portions in a laterally right-angled direction outward. The height outer dimension between the outer surfaces of the upper and lower flange portions is formed to be equal to or longer than the width outer dimension between the outer surfaces of the left and right web portions. Beam material. The beam material according to any one of claims 1 to 5 , wherein a concave group or a convex group is formed on the inner side surfaces of the left and right web portions. The beam material is composed of a lower flange portion, a pair of left and right web portions connected in a right-angled upward direction from the left and right ends of the lower flange portion, and a corner portion from the upper end of at least one of the web portions. A U-shaped frame having a laterally upward upper flange portion at the upper end is formed by a laterally extending upper flange portion, and the thickness of the web portion is equal to the thickness of the flange portion. The thickness of the flange is made thinner than the added value of the thickness of the left and right webs, and the end of this beam is connected to the beam connection of the steel pipe column. Steel structure using beam material characterized by 8. A steel structure using a beam material according to claim 7 , wherein the beam material is connected to the beam material connecting portion by welding and the free ends of the beam material are connected via a bracket and a connector. object. 9. A steel structure using a beam material according to claim 7 , wherein concrete is placed in a recess of the beam material. Claim 7 or 8 steel structure of the beam members use wherein it has Da設the reinforced concrete in the recess of the beam member. Harizai is claim 9 or 10 steel structure of the beam members use, wherein the forming the depressions or protrusions groups on the inner surface of the left and right of the web portion.

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