JP2016079580A - Reinforcing member, and reinforcing structure for perforated steel beam - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve efficiency when welding a reinforcing member to a perforated steel beam, along with reliability and workability, at the same time ensuring degree of freedom of design of equipment piping, etc.SOLUTION: A reinforcing member 1 has an outer peripheral part of a body part 2 formed with a pair of linearly formed parts 4 that face each other and a pair of connection-formed parts 5 arranged symmetrically around an axial line orthogonal to the linearly formed parts 4. The reinforcing member 1 is attached to a web 12 such that the linearly formed part 4 is roughly parallel to a beam axial direction, and the pair of connection-formed parts 5 is fillet welded to the web 12. Welding workability is enhanced while offering a sufficient reinforcing effect, because entire circumference of a hole part 3 needs not be welded to the linearly formed part 4.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a reinforcing member used for reinforcing a steel perforated beam having a through hole in a web, and a steel perforated beam reinforcing structure using the reinforcing member.

  Reduction of the floor height in a building reduces the amount of steel and the like and suppresses the height of the building, which is advantageous both in terms of structure and economy. From such a point of view, perforated beams have been frequently used in recent years for the purpose of arranging the piping for equipment that has been provided under the beam so as to penetrate the beam.

  In steel-framed buildings, steel perforated beams are used in which circular through-holes are formed in beam materials such as H-shaped steel, I-shaped steel, and grooved steel, and the piping for equipment is passed through. The steel perforated beam has a cross section of the member due to the through-holes provided in the web, so that the bending strength and shear strength are lower than those of the non-porous beam. For this reason, reinforcement is made around the through hole by joining a reinforcing member such as a steel attachment plate or sleeve tube by bolt fastening or welding.

  As this type of reinforcing member, for example, Patent Document 1 discloses a shape surrounding a through-hole and bolted to both sides or one side of a web. In order to obtain sufficient strength, the reinforcing member to be bolted needs to have a larger area of view than when joined by welding. Such a reinforcing member increases the number of bolts and the number of bolt insertion holes formed in the web by the amount of the area to be found, which reduces workability and causes design restrictions on equipment piping around the beam. There was an inconvenience.

  Patent Document 2 discloses a reinforcing member in which a substantially cylindrical reinforcing member is inserted inside a through hole and welded around the hole. In this case, the effective diameter of the through hole of the beam is reduced by the thickness of the reinforcing member. Therefore, it is necessary to form a through-hole having a larger hole diameter than the required diameter in consideration of a decrease in effective diameter in the beam, the cross-sectional defect becomes larger, and the reinforcing member also needs to be larger. It was.

  Patent Document 3 discloses a technique in which a reinforcing member having a shape surrounding a through hole is welded to both sides or one side of a web. When the reinforcing members are welded to both sides of the web, in order to ensure the workability of fillet welding, the beam web is welded one side at a time in a state of being laid horizontally. For this reason, it is necessary to perform the work of welding each side and reversing the heavy beam, which reduces work efficiency and increases the risk of work. In the case where the reinforcing member is welded only to one side of the web, it is necessary to ensure the strength only by the reinforcing member on one side, so that the area of the reinforcing member itself has to be larger than that in the case of double-sided welding.

Japanese Utility Model Publication No. 5-57149 JP 2008-184898 A JP 2006-241680 A

  In a small-scale building such as a house, lightweight section steel is sometimes used for the main structure. For example, the beam of a normal heavy section steel beam is 400 to 900 mm, whereas in the case of a light beam steel beam, the beam section is small and can be suppressed to about 200 to 300 mm. Therefore, in the lightweight steel beam material, the opening ratio of the through hole to the beam is increased, and the separation distance from the outer peripheral edge of the through hole to the upper and lower flanges is shortened. If a reinforcing member is provided around the through hole, the area of the reinforcing member that can be found is limited, and it is difficult to join the reinforcing member to the web. In particular, since the distance between the through hole and the upper and lower flanges is narrow, welding work occurs near the flange, and the flange is considered to be an obstacle because it easily comes into contact with a welding tool such as a welding torch or a welding rod.

  If the welding operation is interrupted in the middle of such a difficult-to-weld joint, a weld bead extension is formed, and continuous smooth welding cannot be performed. In addition, there is a problem that stress concentration tends to occur in discontinuous welded joints.

  In addition, regardless of whether the object to be joined is lightweight steel or not, the total cost can be reduced by reducing the amount of welding per through hole in the steel perforated beam as much as possible and reducing the work man-hours. It was also desired to do.

  The present invention has been made in view of the circumstances as described above, and its purpose is to sufficiently consider the workability of welding the reinforcing member to the steel perforated beam, and to provide a perforated hole with a downward stable posture. The joint shape and welding amount, which can be done only from one side of the beam and are easy to weld, are highly reliable, have excellent workability, and provide sufficient reinforcement effects, allowing free design of equipment piping, etc. An object of the present invention is to provide a reinforcing member capable of securing the degree. Another object of the present invention is to provide a steel perforated beam reinforcing structure that is economical, highly accurate, can be rationalized in production, and has excellent mechanical properties.

  In order to achieve the above-mentioned object, the solution means of the present invention includes a main body part attached around a through-hole formed in a web, and a circular hole part provided through both front and back surfaces of the main body part. And a reinforcing member that is welded to a steel perforated beam. With respect to this reinforcing member, the outer peripheral edge of the main body portion is provided with a pair of joined shape portions including curved portions, and each of the joined shape portions swells outward in the radial direction of the hole portion. A first shape portion having a curved shape and a second shape portion that is continuous with the first shape portion and has a substantially straight shape or a curved shape that curves to the opposite side of the first shape portion are used. And it is characterized by making a pair of said joining shape part into a welding junction with a web.

  The conclusion that the reinforcing member according to the present invention is most suitable to be subjected to strength design by repeating various experiments and simulation analysis on the assumption that the reinforcing member is attached only to one side of the web. Has been reached. In the present invention, since the outer peripheral edge of the main body portion is configured as described above, it is possible to ensure the amount of welding with the web in the pair of joined shape portions and sufficiently ensure the reinforcing effect. Has been. Since the joining shape portion includes the first shape portion curved outward, the outer peripheral edge is formed longer than in the case where the joining shape portion is linear, and the length as the weld joint portion can be ensured. Therefore, it is sufficient to use a pair of joint-shaped portions as the weld joints among the outer peripheral edge of the reinforcing member and the inner peripheral edge of the hole, and it is possible to reinforce the steel perforated beam without welding other parts. It becomes. Further, in consideration of welding workability with respect to the reinforcing member at that time, the first shape portion and the second shape portion are provided in the pair of joint shape portions, thereby enabling stable welding work.

  As a more specific configuration of the reinforcing member, it is preferable that the joining shape portion has a shape in which the second shape portion is continuous with both ends of the first shape portion.

  As a result, the reinforcing member can provide a high reinforcing effect while suppressing an excessive increase in the area of the reinforcing member itself without excessively expanding the main body of the reinforcing member in the beam axis direction. be able to. In addition, the reinforcing member having a high reinforcing effect can be formed with a very simple structure without having a complicated shape, and the joint shape portion can be rationally formed, so that the productivity can be improved.

  Further, in the reinforcing member, the outer peripheral edge of the main body portion is formed so as to include a pair of joined shape portions and a pair of opposed linear shape portions that are substantially straight, and the pair of joined shape portions are formed. It is preferable to provide a configuration that is symmetrical with respect to an axis perpendicular to the linear shape portion.

  Thereby, a pair of linear shape parts can be arranged along the beam axis direction, a pair of joint shape parts can be arranged on the left and right sides of the through holes, and the reinforcing member can be attached to the web of the steel perforated beam. . Therefore, the reinforcing member can be formed so as not to interfere with the flange of the steel perforated beam, and the reinforcing effect can be enhanced by ensuring the maximum mutual distance between the pair of linearly shaped portions. Moreover, since a pair of joining shape part has a 2nd shape part, the approach space of the welding tool in the flange vicinity is ensured effectively, and welding workability | operativity can be improved.

Further, in the reinforcing member, the first shape portion of the joint shape portion has a shape approximated to an arc having a radius R ₁ centered on the opening center of the hole portion, and the second shape portion of the main body portion. As a shape approximated to a circular arc having a radius R ₂ and having an outer center, it is preferable that these radii satisfy R ₁ > R ₂ .

As a result, the first shape portion and the second shape portion of the joint shape portion are continuously formed in a smooth curved shape to ensure a certain weld length, and the need to interrupt the welding operation in the middle. It does not occur, the workability of continuous welding is improved, and high quality can be ensured. Note that the first shaped portion, the shape is approximated to an arc of radius R ₁ centered on the aperture center of the hole portion includes an arc shape itself of radius R _1. In addition, regarding the second shape portion, the shape approximated to the arc of radius R ₂ having the center outside the main body includes the arc shape of radius R ₂ itself.

  Further, in the reinforcing member according to the above configuration, the main body portion is a thick portion having a certain thickness in a region between the linear shape portion and the hole portion, and between the first shape portion and the hole portion of the joint shape portion. It is preferable to make this area | region into the thin part of thickness thinner than the said thick part.

  In the steel perforated beam web, a bending moment is generated on the upper and lower sides of the through hole due to a feelering action caused by a shearing force in a cross section at a certain distance from the opening center of the through hole. For this reason, in consideration of the yield bending strength of the cross section, the region between the linear shape portion and the hole portion, which is to be disposed on the upper side and the lower side of the through hole, is a thick portion having a constant thickness. Thus, the bending moment can be applied to the thick portion. Further, in the region between the first shape portion and the hole portion of the joint shape portion, the weight ratio reinforcement efficiency can be improved by making the thin portion thinner than the thick portion. .

  The steel perforated beam reinforcing structure using the reinforcing member according to each of the above solutions is also within the scope of the technical idea of the present invention. That is, a reinforcing structure of a steel perforated beam in which a reinforcing member is welded to one side of a web of a steel perforated beam made of shape steel, and a circular hole corresponding to the through hole of the web is used as the reinforcing member. In addition, an outer peripheral edge provided with a pair of joint-shaped portions including a curved portion is used. Each of the joint shape portions is a curved first shape portion that bulges outward in the radial direction of the hole portion, and is continuous with the first shape portion, and is substantially linear or opposite to the first shape portion. And a second shape portion that is curved. And, in the reinforcing member, it is attached along the height direction of the web, that is, on the left and right sides of the through-hole of the web, so that a pair of joined shape portions are disposed, Of the inner peripheral edge of the hole portion, a pair of joined shape portions on the outer peripheral edge of the main body portion are joined to the web by fillet welding.

  By such a specific matter, the welded joint part of the reinforcing member in the steel perforated beam can be collected into a pair of joint shape parts among the outer peripheral edge of the main body part and the inner peripheral edge of the hole part. Further, it becomes possible to join the reinforcing member to the steel perforated beam only by welding work from one side of the web in a downward stable posture, and the welding work amount can be reduced. It is not necessary to weld the other outer peripheral edge arranged close to the flange and the inner peripheral edge of the hole portion by arranging and welding a pair of joined shape portions along the height direction of the web. For this reason, the work man-hour can be significantly reduced, and the welded joint portion does not include these difficult-to-weld portions, and high quality can be ensured. In addition, the required weld length is secured from the shape of the joint shape portion, and sufficient strength can be obtained.

  In the present invention, the outer peripheral edge of the main body portion is provided with a pair of joint shape portions including a curved portion, and the joint shape portions are respectively formed in a curved shape that bulges outward in the radial direction of the hole portion. The first shape portion and the second shape portion which is continuous with the first shape portion and has a substantially linear shape or a curved shape which curves to the opposite side of the first shape portion are provided. And since it is the structure which makes such a pair of joining shape part the welding joint part with the web of a steel perforated beam, the welding workability | operativity to the steel perforated beam of a reinforcement member is improved markedly, and it is appropriate. The welding amount is ensured, the reliability is high and the workability is high, and a sufficient reinforcing effect can be obtained. In addition, by using a steel perforated beam reinforcing structure using such a reinforcing member, it is possible to ensure a degree of freedom in design of equipment piping and the like, and rationalize manufacturing.

It is a perspective view which shows the reinforcement member which concerns on Embodiment 1 of this invention. It is a front view which shows the reinforcement structure of the steel perforated beam using the said reinforcement member. It is AA sectional drawing in FIG. It is BB sectional drawing in FIG. It is sectional drawing which shows the modification of the reinforcement member shown in FIG. FIG. 6 is an explanatory view showing still another example of the reinforcing member of the first embodiment. It is a front side perspective view which shows the reinforcement member which concerns on Embodiment 2 of this invention. It is a back side perspective view which shows the reinforcement member which concerns on Embodiment 2 of this invention. It is a front view which shows the reinforcement structure of the steel perforated beam using the reinforcement member which concerns on Embodiment 2. FIG. It is CC sectional drawing in FIG. It is DD sectional drawing in FIG.

  Hereinafter, a reinforcing member according to an embodiment of the present invention and a steel perforated beam reinforcing structure using the reinforcing member will be described with reference to the drawings.

(Embodiment 1)
1 to 4 show Embodiment 1 of the present invention. FIG. 1 is a perspective view showing the overall shape of the reinforcing member 1. FIG. 2 shows a reinforcing structure of a steel perforated beam using the reinforcing member 1. FIG. FIG. 3 is a cross-sectional view taken along line AA in FIG. 2, and FIG. 4 is a cross-sectional view taken along line BB in FIG.

  A beam 10 as a steel perforated beam is made of an H-shaped steel material that is a lightweight steel, and includes a pair of upper and lower flanges 11 and a web 12 that connects these flanges 11. The web 12 is formed with a circular through hole 13 penetrating both front and back surfaces. The through-hole 13 is provided in a substantially central portion in the beam direction. The beam 10 may be made of an I-shaped steel, a grooved steel or the like in addition to the H-shaped steel.

  The reinforcing member 1 is attached only to one side of the web 12 so as to surround the through-hole 13, and is joined to the web 12 by fillet welding. The reinforcing member 1 has a main body 2 attached around a through hole 13 formed in the web 12 and a circular hole 3 provided so as to penetrate both the front and back surfaces of the main body 2. The hole 3 has an inner diameter that substantially matches the diameter of the through hole 13 of the web 12. Hereinafter, the reinforcing member 1 will be described on the assumption that the front side shown in FIG.

  The outer peripheral edge of the main body 2 is formed including a pair of linearly shaped parts 4 and a pair of joined shaped parts 5.

  In the illustrated embodiment, the pair of linearly shaped parts 4 are parallel to each other and are provided to face each other with the hole 3 interposed therebetween. The linear shape portion 4 has a linear shape along the arrangement direction of the flange 11 of the beam 10. The mutual distance between the pair of linearly shaped portions 4 is ensured to the maximum corresponding to the mutual distance between the upper and lower flanges 11.

  Further, the pair of joint shape portions 5 are provided on the left and right sides with an axis line orthogonal to these linear shape portions 4 passing through the center of the hole portion 3. The outer peripheral edge of the main body 2 has a shape surrounded by the linear shape portion 4 and the joint shape portion 5.

  The main body 2 includes a chamfered portion 6 on the back side of the pair of linearly shaped portions 4. Since the pair of linearly shaped portions 4 are arranged along the beam axis direction, the back side of these linearly shaped portions 4 is arranged close to the web fillet 14 of the beam 10. Therefore, as shown in FIG. 3, the corner portion on the back surface side of the linear shape portion 4 is chamfered in a slope shape, and contact with the web fillet 14 can be avoided by the chamfer portion 6.

  Further, by providing the chamfered portion 6 on the back surface side of the main body portion 2 in this way, the common reinforcing member 1 can be used to support the reinforcement of steel perforated beams having various shapes and beams. Is possible.

  The main body 2 is configured to secure the mutual distance between the pair of linearly shaped parts 4 as much as possible, and in consideration of welding workability, the linearly shaped part 4 does not become a welded joint, and has a certain reinforcing effect. It is preferable that the configuration is secured and bonded to the web 12.

  Therefore, in the present embodiment, the reinforcing member 1 is configured so that the weld joint portion with the web 12 can be limited to the pair of joint shape portions 5.

  That is, at the outer peripheral edge of the main body portion 2, the pair of joined shape portions 5 has a first shape portion and a second shape portion. As the first shape portion, a curved curved portion 51 bulging outward in the radial direction of the hole 3 is formed. In addition, a curved reverse curved portion 52 that is curved to the opposite side with respect to the curved portion 52 is formed as the second shape portion.

  As shown in FIG. 1, in the joint shape portion 5, one curved portion 51 is smoothly connected to the reverse curved portion 52 at both ends thereof. Further, the curved portion 51 has a shape that is continuous with the linear shape portion 4 via the reverse curved portions 52 at both ends. The joint shape portion 5 is a weld joint portion between the reinforcing member 1 and the web 12.

  The reinforcing member 1 can satisfy the welding length for joining to the beam 10 by providing the outer peripheral edge with the joining shape portion 5 including the curved portion 51 and the reverse curved portion 52. By using the pair of joint shape portions 5 as weld joints and joining the reinforcing member 1 to the beam 10, it is possible to sufficiently ensure the reinforcing effect of the beam 10.

  The joint shape portion 5 is formed in a smoothly continuous curved shape and does not include a corner portion. Therefore, the joining shape part 5 does not include the discontinuous part of a welding line by using this as a welding joint part, and a continuous smooth welding operation is possible.

  Further, since the outer peripheral edge of the main body 2 is formed to include such a pair of joint-shaped portions 5, a necessary and sufficient reinforcing material can be disposed around the through-hole 13 as the reinforcing member 1. Thus, the amount of steel material can be suppressed.

  Reinforcement member 1 includes general structural rolled steel (SS), welded structural rolled steel (SM), welded structural cast steel (SCW), stainless steel cast steel (SCS), white core malleable cast iron (FCMW), black core acceptable It is made of a weldable material such as forged cast iron (FCMB), and can be formed of, for example, a steel plate having a certain thickness. Further, the reinforcing member 1 can be formed by casting or forging. By forming the reinforcing member 1 from the material, it is possible to suitably ensure mechanical strength, dimensional accuracy, mass productivity, and the like.

  The thickness e of the reinforcing member 1 shown in FIG. 3 is a thickness having a target structural strength based on stress analysis (for example, CAE analysis) by a finite element method, and is set by the steel type of the material constituting the reinforcing member 1 can do.

  For example, in the reinforcing member 1 shown in FIG. 2 and FIG. 3, it is composed of a general structural steel SS400, whereas the beam of the beam 10 is 200 mm and the diameter of the through hole 13 is 135 mm. And has a thickness of 16 mm.

  Moreover, in the reinforcing member 1 illustrated by the same longitudinal cross section in FIG. 5, it is comprised from the rolled steel material SM490 for welded structures. In this case, the reinforcing member 1 has a thickness of 12 mm with respect to the beam 10 having a through hole 13 having a diameter of 200 mm and a diameter of 135 mm, and is thinner than the reinforcing member 1 shown in FIG. It is formed with.

  When the diameter of the through hole 13 formed in the web 12 of the beam 10 is large, or when the opening ratio of the through hole 13 with respect to the beam is large, if the overall shape of the reinforcing member is increased accordingly, it interferes with the flange. There is a limit to expanding in the direction. In the present invention, the required strength is ensured by the thickness of the main body 2 of the reinforcing member 1, and the main body 2 can be effectively reinforced without increasing the size of the main body 2 more than necessary. ing.

  The joint shape portion 5 formed on both side edges of the reinforcing member 1 described above is curved in a direction opposite to the curved portion 51 and a curved portion 51 that is curved outward in the radial direction of the hole portion 3. If it is a shape which has the curved reverse curved part 52, favorable welding workability | operativity will be ensured and sufficient reinforcement effect can be exhibited. The pair of joined shape portions 5 in the reinforcing member 1 can be configured as shown in FIG.

  FIG. 6 is a front view showing a modification of the reinforcing member 1 according to the first embodiment and showing a reinforcing structure of the beam 10 using the reinforcing member 1.

In the pair of joined shape portions 5 of the reinforcing member 1 according to this embodiment, the curved portion 51 is shaped to approximate a circular arc having a radius R ₁ with the opening center of the hole portion 3 as the center. Further, the reverse curved portion 52 has a shape approximate to an arc having a radius R ₂ centered on the outside of the main body 2. The curved portion 51 and the reverse curved portion 52 are formed to satisfy the relationship of R ₁ > R ₂ .

For example, if the radius R ₂ on the reverse curved portion 52 side is larger than the radius R ₁ on the curved portion 51 side, the area of the reinforcing member 1 to be found becomes large, which is uneconomical. Moreover, when using a general welding tool and using it for a beam having a general beam section, it is not necessary to set R ₁ ≦ R ₂ for these radii. For this reason, in the reinforcing member 1, it is preferable that the curved portion 51 and the reverse curved portion 52 are formed so as to satisfy the relationship of R ₁ > R ₂ .

  Stable mechanical properties can be ensured by the reinforcing member 1 configured as described above. Moreover, the reverse curved part 52 is arrange | positioned in the location close | similar to the flange 11 by making a pair of joining shape part 5 into a welding junction part among the outer periphery of the main-body part 2, such as a welding torch or a welding rod. A sufficient space for allowing the welding tool to enter can be provided between the flange 11. Therefore, the reinforcing member 1 can be welded satisfactorily without causing the welding tool to interfere with the flange 11, there is no possibility of causing a welding defect, and the welding quality can be improved.

The curved portion 51 and the reverse curved portion 52 may be arc shapes having the radii in addition to the shapes approximate to the radii R ₁ and R ₂ , respectively.

  When welding the reinforcing member 1 having the above configuration to the web 12 of the beam 10, the web 12 is horizontally laid and the beam 10 is disposed, and the through hole 13 and the hole 3 of the reinforcing member 1 are matched to each other. The reinforcing member 1 is applied to 12. Thereby, the welding operation | work of the reinforcement member 1 can be performed by the stable downward attitude | position. The reinforcing member 1 can be joined only by single-sided welding, and there is no need to perform welding work by inverting the beam 10. The reinforcing member 1 is fillet welded at the connection portion between the joining shape portion 5 and the web 12 and joined via the weld bead 8.

  The welded joint in the reinforcing member 1 can be limited to a pair of joint-shaped portions 5 in the outer peripheral edge of the main body 2 and the entire circumference of the hole 3. Since the joining shape portion 5 has a curved shape in which the weld line is smoothly continuous, it is easy to perform continuous fillet welding, easy to ensure welding quality, and easy to apply automatic welding. Yes.

  Further, the reinforcement member 1 and the beam 10 need only be welded to the pair of joint shape portions 5, and the linear shape portion 4 in the vicinity of the flange 11, which is difficult to weld, may not be welded. That is, if the linear portion 4 adjacent to the flange 11 of the beam 10 is welded, it must be welded in a cramped state, and careful attention must be paid to welding defects. However, since there is no need to weld the linearly shaped portion 4, there is no need to worry about welding defects in the portion, and welding quality is ensured.

  Further, even if the welding of the linear shape portion 4 is omitted, the welding amount is ensured by the entire length of the pair of joint shape portions 5, and thus a sufficient reinforcing effect is exhibited. Furthermore, since the welding operation for the entire circumference of the hole 3 is not required, no weld overlay is formed along the inner peripheral edge of the hole 3, and the hole diameter of the through-hole 13 is not reduced. .

  By adopting such a reinforcing structure using the reinforcing member 1, it is possible to increase the limit value of [diameter of the through hole / web of the beam] that can be practically implemented, and a lightweight steel with a small beam. Even if it is the beam material which consists of, sufficient structural strength can be provided and the design freedom, such as piping for facilities, can be raised.

(Embodiment 2)
7 to 11 show a configuration according to Embodiment 2 of the present invention, FIG. 7 is a front perspective view of the reinforcing member 1, FIG. 8 is a rear perspective view of the reinforcing member 1, and FIG. 9 is a beam using the reinforcing member 1. 10 is a front view showing the reinforcing structure of FIG. 10, FIG. 10 is a sectional view taken along the line CC in FIG. 9, and FIG. 11 is a sectional view taken along the line DD in FIG.

  The reinforcing member 1 according to this embodiment is common in the basic structure of the reinforcing member 1 according to the first embodiment, but has a feature in the thickness configuration of the main body 2 and the structure on the back side of the main body 2. Therefore, in the following description, the characteristic configuration as the second embodiment will be described in detail, and the description of other configurations will be omitted using the same reference numerals as those in the first embodiment.

  As shown in FIG. 7, the reinforcing member 1 has a thick portion 21 and a thin portion 22 in the main body portion 2. Further, the reinforcing member 1 is formed by connecting the thick portion 21 and the thin portion 22 by a sloping portion 23 that is gently slanted.

The thick portion 21 is formed with a constant thickness in a region between the linear shape portion 4 and the hole portion 3 in the main body portion 2. On the other hand, the thin portion 22 is formed in a region between the curved portion 51 and the hole portion 3 of the joint shape portion 5 and has a constant thickness that is thinner than the thick portion 21. As shown in FIG. 10, in the reinforcing member 1 according to this embodiment, the thickness e ₁ of the thick portion 21 is 13 mm, whereas the thickness e ₂ of the thin portion 22 is 10 mm.

  The thick part 21 of the reinforcing member 1 is formed to be thick in the front side direction of the main body part 2. In addition, the inclined portion 23 is formed on the front side of the main body portion 2 as an inclined surface whose thickness is gradually reduced from the thick portion 21 to the thin portion 22. The inclined portion 23 is formed between the thick portion 21 and the thin portion 22 and is provided in a region inside the reverse curved portion 52 and a region inside the portion where the reverse curved portion 52 and the curved portion 51 are connected. ing.

  On the upper side and the lower side of the through-hole 13 of the beam 10, a bending moment is generated in a cross section at a fixed distance from the opening center of the through-hole 13 due to the feelering action caused by the shearing force. For this reason, in consideration of the yield bending strength of the cross section, the portion of the main body 2 to be disposed on the upper side and the lower side of the through hole 13, that is, between the linear shape portion 4 and the hole portion 3. A thick portion 21 is provided in the region. Thereby, the said bending moment can be effectively borne by the thick part 21. FIG.

  Further, as shown in FIG. 8, two ribs 71 are provided on the back side of the reinforcing member 1. The rib 71 of the reinforcing member 1 is erected along the joint shape portion 5 at the outer peripheral edge portion on the back surface side of the main body portion 2. Thereby, a concave groove 72 surrounded by two ribs 71 is formed on the back side of the main body 2. The concave grooves 72 are opened through the upper and lower linear portions 4, respectively. The rib 71 is formed to have a trapezoidal cross section with a protrusion amount (height) from the main body 2 of 1.5 mm or more, preferably about 2 mm.

  Normally, when a surface treatment such as electrolytic coloring or hot dip galvanization is applied to a steel perforated beam, the reinforcing member 1 is first welded, and then the beam 10 is immersed in a processing solution (so-called dobbling). At that time, in order to prevent excessive treatment liquid from remaining on the contact surface between the web 12 of the beam 10 and the reinforcing member 1, the back surface of the reinforcing member 1 is completely brought into close contact with the web 12 or an appropriate gap is provided. It is desirable to provide and smoothly discharge the processing liquid.

  In the illustrated embodiment, when the reinforcing member 1 is welded to the beam 10, the rib 71 is closely bonded to the web 12 and a gap is formed between the rib 12 and the web 12. When the beam 10 welded to the reinforcing member 1 is dipped in the processing liquid for painting or plating and pulled up, the concave groove 72 allows the processing liquid to be smoothly discharged from between the reinforcing member 1 and the web 12. It works to promote As a result, the processing liquid flows out from between the one linear shape portion 4 of the main body portion 2 and the web 12 through the concave groove 72 and can be smoothly discharged. Between the other linear shape part 4 and the web 12, it acts as an air vent.

  Further, a chamfered portion 6 is formed on the edge of the rib 71 and the groove 72 on the back side of the linear portion 4 of the main body 2. Thereby, even if it exists in the reinforcement member 1 which concerns on this form, the contact with the web fillet 14 of the beam 10 is avoided, and it can be made to respond | correspond to the reinforcement of the beam 10 which has various shapes and beams.

  As shown in FIG. 9, the welded joint between the reinforcing member 1 and the beam 10 can be limited to a pair of joint shapes 5. The reinforcing member 1 does not need to be welded to the linear portion 4 in the vicinity of the flange 11 where welding is difficult, and the entire circumference of the hole 3 may not be welded. Since the pair of joint shape portions 5 are extremely excellent in welding workability, high welding quality is ensured.

  Even if the welding of the linear shape portion 4 is omitted, the welding amount is secured by the total length of the pair of joint shape portions 5, so that a sufficient reinforcing effect is exhibited, and the limit of [diameter of the through hole / web web] The value can be increased. For this reason, the reinforcement member 1 can be used suitably with respect to the steel perforated beam which consists of a lightweight shape steel.

  In addition, by reinforcing the beam 10 using such a reinforcing member 1, it is possible to ensure design flexibility of equipment piping and the like, and to streamline manufacturing, and to make the beam 10 equal to or better than a non-hole beam. It can be provided with specific properties.

  The reinforcing member 1 and the steel perforated beam reinforcing structure according to the present invention can be implemented in various other forms besides the above-described embodiment.

  For example, the outer peripheral edge of the main body 2 is not limited to a shape including the linear shape portion 4 and the joint shape portion 5 described above. The first shape portion of the joint shape portion 5 may be a perfect circular arc shape or an elliptical arc shape as long as it is a curved shape bulging outward from the hole portion 3. May be formed. Further, the second shape portion may be formed in a linear shape or a substantially linear shape in addition to the reverse curved shape as described above. Moreover, the linear shape part 4 does not necessarily need to be a parallel linear shape. Furthermore, in the outer periphery of the main-body part 2, the part except the joining shape part 5 may not be made into the linear shape along the flange 11, but may be made into any outer shape. In addition, as a reinforcing structure of the steel perforated beam, the reinforcing member 1 is configured to be bonded to one side of the web 12 to obtain a sufficient reinforcing effect, but may naturally be bonded to both sides of the web 12. Therefore, the said embodiment is an illustration to the last, Comprising: It is not limited.

  The present invention can be suitably used for a steel perforated beam in which a through hole is formed in a web.

DESCRIPTION OF SYMBOLS 1 Reinforcement member 2 Main body part 21 Thick part 22 Thin part 23 Inclination part 3 Hole part 4 Linear shape part 5 Joining shape part 51 Curved part 52 Reverse curve part 6 Chamfer part 71 Rib 72 Concave groove 10 Beam (steel hole hole beam)
11 Flange 12 Web 13 Through hole

Claims (6)

A reinforcing member having a main body portion attached around a through-hole formed in a web and a circular hole portion penetrating both front and back surfaces of the main body portion and welded to a steel perforated beam In
The outer peripheral edge of the main body portion is provided with a pair of joint shape portions including a curved portion,
Each of the joint shape portions is a curved first shape portion that bulges outward in the radial direction of the hole portion, and is continuous with the first shape portion, and is substantially linear or opposite to the first shape portion. A second shape portion that is curved to be curved,
A reinforcing member, wherein the pair of joint shape portions are welded joint portions with a web. The reinforcing member according to claim 1,
The joining shape portion is a reinforcing member characterized in that a second shape portion is continuous with both ends of the first shape portion. The reinforcing member according to claim 1 or 2,
The outer peripheral edge of the main body portion is formed to include a pair of joined shape portions and a pair of opposed linear shape portions that are substantially straight.
A pair of joining shape parts are provided in a symmetrical manner with respect to an axis perpendicular to the linear shape part. In the reinforcing member according to any one of claims 1 to 3,
First shaped portion of the joint-shaped portion has a shape which approximates a circular arc of radius R ₁ centered on the aperture center of the hole, the second shape portion radius having a center outside of the main body portion A reinforcing member having a shape approximate to an arc of R ₂ , wherein R ₁ > R ₂ . The reinforcing member according to claim 3 or 4,
The body portion is a thick portion having a constant thickness between the linear shape portion and the hole portion, and the region between the first shape portion of the joint shape portion and the hole portion is the thick wall portion. A reinforcing member characterized by being a thin-walled portion having a thickness thinner than the portion. A steel perforated beam reinforcing structure in which a reinforcing member is welded to a steel perforated beam web made of a section steel,
The reinforcing member has a circular hole corresponding to the through-hole of the web, and is provided with a pair of joint-shaped portions including a curved portion on the outer peripheral edge,
Each of the joint shape portions is a curved first shape portion that bulges outward in the radial direction of the hole portion, and is continuous with the first shape portion, and is substantially linear or opposite to the first shape portion. And a second shape portion that is curved to be curved,
The reinforcing member is provided with a pair of joint shape portions along the height direction of the web, and the pair of joint shape portions of the outer peripheral edge of the main body and the inner peripheral edge of the hole are joined to the web by fillet welding The steel perforated beam reinforcement structure characterized by being made.

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