JP2011174314A - Light-gauge h-shape steel member for composite beam - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a low-cost composite beam serving as a beam material of a wooden house, by which a wood material having a small diameter can be placed on the upper and lower sides of a beam in cross-section, and efficient cross-sectional performance is obtained using plated sheet steel in a center of the beam. <P>SOLUTION: A light gauge channel for the beam material is formed by bending pre-plated sheet steel in a longitudinal direction. A substantive light gauge channel has screw holes 9 formed at predetermined intervals in lips 3 extending upward from the front end of an upper flange and downward from the front end of a lower flange of the light gauge channel. Plate pieces 5 are inserted and overlapped between the web backs of the substantive light gauge channels at predetermined intervals in the longitudinal direction, and the webs and the plate pieces 5 are integrally fixed through calking 7, by which the cross section is formed into a substantially H-letter shape. The wood material 6 is inserted between the lips 3 extending from each of upper and lower flanges. The wood material 6 is fixed with screws 10 through the screw holes 9 formed in the lips. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

The present invention is a beam material used as a structural material in a conventional frame construction method, a frame construction method, a panel construction method, etc. in a low-rise steel structure or a wooden house, and has an efficient cross-sectional performance, The present invention relates to a lightweight H-shaped steel beam for a composite beam in which a plated steel plate is used at the center and a small-diameter wood can be placed at the end.

Conventionally, most residential buildings are wooden buildings, and most of them are framed. The wooden frame construction method has few legal regulations other than the three-story building, and since the construction engineers were able to design and construct freely without any intervention from the design stage, the structural variation was very large. There are many current situations. However, since the Great Hanshin-Awaji Earthquake, research on the traditional frame construction method, which was heavily damaged, has increased rapidly, and detailed design methods are being completed. On the other hand, large-diameter timber and qualitatively excellent timber are no longer available in nature, and logging of timber has been restricted from the standpoints of nature conservation and resource conservation.

In recent years, in order to deal with such problems, strips made of small-diameter trees such as secondary forests and thinned timber are effectively used, and strips cut from these logs (also called lamina or sawing board). A laminated material obtained by laminating and laminating a plurality of materials has been used for structural materials such as columns and beams in wooden buildings. However, the strength of the laminated lumber may vary due to the nodes and other defects remaining in the lamina that constitutes the laminated lumber. In particular, the laminated lumber used as a structural lumber is different from the tree species used in the lamina. They were limited to specific (high-strength tree species) and tended to be more expensive than solid wood. Therefore, Japanese Unexamined Patent Publication No. 2000-153508 (first known example) discloses a composite laminated material that can be produced economically with little variation in strength characteristics.

Also, in Japanese Patent Application Laid-Open No. 2007-196563 (second known example), depending on the use of the structural material for construction (for example, pillar, beam, etc.) Heterogeneous tree-gathering lumber that promotes the use of low-strength tree species such as is disclosed.

Furthermore, in Japanese Patent Application Laid-Open No. 2007-284944 (third known example), the laminated wood is expensive and expensive compared to the lumber, so there is no advantage of the laminated wood (there is no fear of strength reduction due to cracks like solid wood). It is possible to realize a wooden beam with a large cross section, which was difficult with sawing, and because the variation in strength and rigidity is small due to the distribution of weak points, the design can be rationalized, etc.) A wooden beam in which a plurality of lumbers for the purpose of cost reduction is combined and reinforced with a steel plate is disclosed.

On the other hand, a pre-plated steel plate is bent to form a beam member, the webs of the pair of beam members are overlapped with each other, and the web members are caulked and fixed together to make the beam members difficult to buckle. A composite beam member is disclosed in Japanese Patent Laid-Open No. 2002-004495 (fourth known example).

JP 2000-153508 A JP 2007-196563 A JP 2007-284944 A JP 2002-004495 A

However, in the case of the first and second known examples, the laminated lumber is expensive only with the high-strength tree species of lamina (saw board), so from among a wide range of tree species from weak to strong tree species Select an efficient cross-sectional shape. As a result, management becomes widespread and inventory increases. Furthermore, it is also necessary to manage lamina warpage, cracks, joints, etc., and ensuring strength (small variation in strength characteristics) and economic efficiency are inversely proportional and may contradict the effects of the invention. In addition, there is a possibility that the wood will absorb water from the small mouth, and management corresponding to rain at the time of rain at the construction site, for example, management of construction stoppage in rainy weather, curing of the material storage, etc. are necessary.

Next, in the case of the third known example, a plurality of lumbers are overlapped in the beam forming direction, and a method of fixing with a scissors to the steel plates arranged on the side surfaces of the plurality of lumbers, but each lumber is warped, cracked, It has knots, bends, twists, etc., and it is naturally assembled in consideration of the sawing of the lumber, but it is difficult to keep the dimensional accuracy in terms of cost, and the steel plate is familiar and fixed to the lumber of the sawing during assembly, There is a possibility that problems such as shape dimensions, bending, and twisting of the member may occur.

In the case of the fourth known example, a pre-plated steel plate is bent to form a beam member, the webs of the pair of beam members are overlapped with each other, and the web members are fixed by caulking. Although it is manufactured, it can be used for the frame construction method and the panel construction method, but in the conventional shaft construction method, it becomes impossible to fit with other wooden members.

The problem to be solved by the present invention is to solve the above-mentioned problems of strength and cost of conventional beams, and promote the utilization of low-strength tree species such as cedar and create an efficient cross-sectional shape. The present invention provides a lightweight H-section steel for synthetic beams having high cross-sectional performance.

  As a result of studying to solve the above-mentioned problems, the present inventor uses a steel plate for the part requiring bending strength and tensile strength, and uses a small diameter wood for the part requiring compression strength and accommodation. Obtained technical knowledge. Specifically, beams in wooden houses are subjected to bending stress due to the load of furniture and residents inside the house, resulting in bending stress, compressive stress on the upper side of the beam, and tensile stress on the lower side. Has occurred. Therefore, high-strength tree bay pine and the like are used in conventional wooden house beams. In the technology of the present invention, approximately H-shaped steel is used to cope with bending stress and tensile stress, and compressive stress is addressed with a low-strength tree type and an upper flange of the approximately H-shaped steel, and the characteristics of each material are utilized. Thus, the inventors have conceived that it is possible to ensure both strength and use of low-strength tree species. The gist is as follows.

(1) A light grooved steel for a beam material formed by bending a pre-plated steel plate along the longitudinal direction, upward from the top flange tip of the light grooved steel, from the tip of the lower flange A substantially light grooved steel having screw holes at predetermined intervals on a downwardly extending lip, and plate pieces at predetermined intervals in the longitudinal direction between the backs of the substantially light grooved steel webs. Are inserted and polymerized, and the web and the plate piece are integrally fixed by caulking, so that the cross section is formed in a substantially H shape, and wood is inserted between the lips extending from the upper and lower flanges. A lightweight H-section steel for composite beams, wherein the wood is fixed with screws from screw holes in the lip.

(2) A light groove steel for a beam material formed by bending a pre-plated steel plate along the longitudinal direction, and the light groove steel is hat-shaped at predetermined intervals on the web. In the substantially light grooved steel having a lip extending upward from the top end of the upper flange and downward from the top end of the lower flange, and having a screw hole at a predetermined interval in the lip, The web backs of the substantially light groove-shaped steels are overlapped and fixed in the longitudinal direction at predetermined intervals with caulking, and a U-shaped reinforcing plate is inserted into the lower flange in whole or in part along the longitudinal direction. And the cross section is formed in a substantially H-shape, and wood is inserted between the lips extending from the upper and lower flanges, and the wood is fixed with screws from the screw holes provided in the lip. Lightweight H-section steel.

(3) A pre-plated steel plate is bent, and the lower flange and web portion of the light H-shaped steel for the beam material are double layered, extending upward from the upper flange and the tip of the upper flange portion. The lip is formed of a single-layer plate, and in the substantially light H-shaped steel having screw holes at predetermined intervals in the lip, the webs are fixed to each other by caulking in the longitudinal direction at predetermined intervals. A lightweight H-section steel for composite beams, characterized in that wood is inserted between lips extending from an upper flange of a substantially light H-section steel, and the wood is fixed with screws through screw holes provided in the lip.

(A) The lightweight H-section steel for composite beams according to the present invention is a composite beam that can ensure both strength and use of low-strength tree species by utilizing the characteristics of different materials by combining different materials. For example, a steel plate is processed and used in the part where bending strength and tensile strength are required, and the upper part (flange) on the upper side of the beam subjected to compressive stress has a relatively low compressive strength but a weak bending strength. An efficient cross-section is formed by placing strong cedars. Therefore, it is possible to obtain a composite beam having high cross-sectional performance and low cost and extremely high practicality.

(B) According to the lightweight H-shaped steel for composite beams according to the present invention, a steel plate (gusset plate) is inserted between the webs, and a brace is attached to the gusset plate so that the proof strength of the axial force system. You can make a wall. In addition, since the through column of the conventional frame construction method has a large joint loss in a small cross section, the bending strength could not be expected. However, according to the technique of the present invention, the bending strength is small and the bending strength can be expected. Therefore, it is possible to rationally design with an emphasis on earthquake resistance and durability, resulting in a tenacious structure. Further, unlike the conventional wooden beam, there are obtained effects such as little creep phenomenon (floor deflection does not return to its original state).

(C) According to the lightweight H-shaped steel for composite beams according to the present invention, when the through column is made to have a large cross section, a ramen type bearing wall can be formed by semi-rigid joining. Specifically, a steel plate is installed at the center of the column in contact with the beam joint of the through column, and the steel plate between the composite beam webs is sandwiched between the steel plates and fixed with bolts, etc., and the steel plate (gusset plate) is subjected to bending stress. Resist. Therefore, a large span in a wooden house is possible, a design that places importance on earthquake resistance and durability can be rationally performed, and a tenacious structure can be obtained.

(D) According to the lightweight H-section steel for composite beams according to the present invention, a low-strength tree species can be used for a part of the beam related to bending strength. For example, a cedar or the like having a relatively high compressive strength is placed on a substantially H-shaped steel upper portion (flange) to which a compressive stress is applied to form a composite beam. Therefore, it is possible to promote the effective use of low-intensity tree species such as Japanese cedar, which has abundant domestic forest resources.

It is a schematic diagram which shows 1st Example of the lightweight H-section steel for composite beams concerning this invention. It is explanatory drawing which shows an example of the shape of a substantially light groove-shaped steel of 1st Example, and a plate piece shape, (a) A schematic diagram of a substantially light groove-shaped steel, (b) A schematic diagram of a plate piece. is there. It is sectional drawing which shows an example of the flow explaining the caulking fixation processing process of 1st Example, and an example of a joining form, (a) Sectional drawing of a joining initial position, (b) Sectional drawing at the time of deep drawing, (c) It is sectional drawing at the time of crimping | fixing, (d) Completion of a junction part, (e) Longitudinal sectional view of a crimping fixing part form. It is explanatory drawing which shows an example at the time of construction of the 1st Example of the lightweight H-section steel for composite beams concerning this invention, (a) Bearing wall of an axial force system (brace), (b) Semi-rigid joining ( It is a schematic diagram of a (ramen) bearing wall. It is a schematic diagram which shows 2nd Example of the lightweight H-section steel for composite beams concerning this invention, (a) is AA sectional drawing, (b) is BB sectional drawing. It is explanatory drawing which shows an example of the shape of a substantially light groove-shaped steel of a 2nd Example, and a reinforcement plate, (a) A schematic diagram of a substantially light groove-shaped steel, (b) A schematic diagram of a reinforcement plate. is there. It is sectional drawing which shows an example of the flow explaining the caulking fixation processing process of 2nd Example, and an example of a joining form, (a) Sectional drawing of a joining initial position, (b) Sectional drawing at the time of deep drawing, (c) It is sectional drawing at the time of crimping | fixing, (d) Completion of a junction part, (e) Longitudinal sectional view of a crimping fixing part form. It is a schematic diagram which shows 3rd Example of the lightweight H-section steel for composite beams concerning this invention. It is sectional drawing which shows an example of the flow and joining form explaining the caulking fixation processing process of 3rd Example, (a) Sectional drawing of a joining initial position, (b) Sectional drawing at the time of deep drawing, (c) It is sectional drawing at the time of crimping | fixing, (d) Completion of a junction part, (e) Longitudinal sectional view of a crimping fixing part form.

Hereinafter, the best mode for carrying out the present invention will be described with reference to FIGS. 1 to 9.
In addition, as a material of the lightweight H-shaped steel for composite beams, a metal material such as a hot dip galvanized steel plate and a hot 55% aluminum-zinc alloy plated steel plate is desirable, and a thickness of about 1.0 to 3.2 mm is desirable, but is particularly limited. Is not to be done. The machine to be manufactured is not particularly limited. For example, as a method for forming the shape of the light grooved steel, it can be formed by any one of a pultrusion method, a press method, a roll forming method, and the like. The caulking process can be performed by a press machine or a complex machine facility that combines the respective machines. For wood, it will be procured by a construction company.

Example 1
FIG. 1 is a schematic view showing an example of a lightweight H-section steel for composite beams according to a first embodiment of the present invention. In this example, it comprises a flange 1, a web 2 a, a web 2 b, a lip 3, a plate piece 5, a wood 6, a caulking fixing 7, a screw hole 9 and a screw 10. Hereinafter, it demonstrates along this.

FIG. 2 is an explanatory view showing an example of the shape of the substantially light groove-shaped steel and the shape of the plate piece 5 of the first embodiment. First, a substantially light groove-shaped steel is produced. Before producing a pre-plated long steel plate, screw holes 9 having a diameter of about 4.5 mm are formed in the vicinity of both ends of the plated long steel plate at intervals of about 300 mm. In the next step, as shown in FIG. 2 (a), the plated long steel plate that has been machined with a screw in the previous step is oriented along the longitudinal direction with the tip of the flange 1 at the upper part of the U-shaped upward. The lip 3 is bent at a right angle downward from the tip of the lower flange 1. In another step, the plate piece 5 is punched as shown in FIG. The shape of the plate piece 5 is rectangular, and the dimension in the long side direction is approximately the same as the size of the lip 2. The dimensions and thickness of the short side direction are determined by various conditions at the time of design. As standard values, the short side direction is about 50 to 120 mm, and the plate thickness is about 2.3 to 9.0 mm.

Subsequently, the substantially light groove-shaped steel produced as described above is assembled together into a substantially H-shape. First, as shown in FIG. 1, a plate piece 5 is inserted between the webs 2a and 2b of the substantially light groove-shaped steels arranged back to back at intervals of about 250 to 400 mm in the longitudinal direction. The contact state between the projecting piece 5 and the web 2 is confirmed, and caulking processing 7 is performed in parallel. Thereby, the light weight H-section steel for synthetic beams fixed firmly is manufactured. The lightweight H-shaped steel for composite beams has a web size of about 150 to 350 mm, a flange size of about 100 to 200 mm, and a length of about 3 to 6 m.

FIG. 3 is a cross-sectional view showing an example of a flow and a joining form for explaining a manufacturing process for caulking and fixing the overlapping portion. (A) is sectional drawing before the process in which the plate piece 5 is located between the web 2a and the web 2b, (b) is the plate piece 5 in the center, and the web 2a and the web 2b are deep. It is sectional drawing of the condition narrowed down, (c) is a momentary sectional view in which the said applicable part is crimped 7 and (d) is sectional drawing at the time of completion of a junction part. Moreover, (e) is an enlarged longitudinal sectional view showing the caulking fixing portion 7, which will be described below.

As shown in FIG. 3 (c), a punch 14 having a circular cross section is pushed toward the die 15, and the corresponding portion is pressed and deformed to form a circular recess 7a as shown in FIG. 3 (e). Projections 7b are formed on the side. At the same time, the outer locking flange 7c is formed. That is, as shown in FIGS. 3C and 3E, the peripheral portion of the protruding portion 7b is deformed by the thickness of each plate due to the function of the die 15, and the corresponding portion of the web 2b is circular and spreads outward. An outer locking flange 7c is formed. Therefore, the plate 2 and the corresponding part of the web a bite into the web 2b side, and the web 2 and the plate 5 are combined. Thereby, the effect which can fully ensure the intensity | strength of the beam material which coped with shearing is acquired. The size of clinch caulking is about 8 to 10 mm in diameter.

The clinch caulking 7 is shown as a representative for joining the web 2 and the plate piece 5. However, the present invention is not limited to this, and a sufficient contact area between the web and the plate piece can be secured and satisfied. If the strength to cope with the stress can be obtained, other joining methods can be applied. For example, burring caulking, blind rivets, bolts, screws and the like can be mentioned.

Next, construction examples using the beam according to the present invention will be described. FIG. 4 is an explanatory view showing an example of an assembled state of a column and a lightweight H-shaped steel for a composite beam, (a) a bearing wall of an axial force system (braces), (b) a semi-rigid joint (ramen system) ) It is a schematic diagram of a bearing wall. Hereinafter, it demonstrates along this.

First, in the case of a bearing wall of an axial force system (braces), as shown in FIG. 4 (a), first, the column 11 is subjected to a groove processing in which a gusset plate 12a can be inserted, and the processed groove is subjected to a gusset plate. -Insert the toe 12a, drive a plurality of drift pins (not shown) from the side of the pillar 11, and fix the gusset plate 12a to the pillar 11. Subsequently, both end webs 2a and 2b of the beam according to the present invention are inserted and fitted into the gusset plate 12a fixed to the column 11. That is, the gusset plate 12a is sandwiched between the webs 2. Next, a plurality of bolts (not shown) are inserted in the direction of the web 2b from the bolt hole side of the web 2a through the bolt holes of the gusset plate 12a, and a plurality of nuts (not shown) are tightened and fixed on the web 2b side. . The above procedure completes the connection between the column and the beam, and then attaches a brace that resists horizontal loads. The mounting procedure is as follows. The blade hole of the brace 13 is brought into contact with the bolt hole (for brace) hole processed in the gusset plate 12a fixed by the pillar 11 and the beam, and a bolt and nut (not shown). )). That is, it is a construction method in which a column, a beam and a brace are combined to cope with a horizontal force. As a result, the bearing walls (braces) are arranged in a well-balanced manner on the building plane, resulting in a structurally stable and strong building. In addition, the conventional brace type has a different proof strength depending on the thickness of the brace member and the presence or absence of points such as joints, and the way to stop the end. The technology of the present invention is very easy to manage and can contribute to the improvement of building performance. The shape and dimensions of the gusset plate 12a are determined by various conditions at the time of design, but the plate thickness is about 2.3 to 4.5 mm.

Next, in the case of a semi-rigid joint (ramen-based) bearing wall, as shown in FIG. 4 (b), first, the column 11 is subjected to a groove process in which the gusset plate 12b can be inserted, The gusset plate 12 b is inserted, and a plurality of drift pins (not shown) are driven from the side of the column 11 to fix the gusset plate 12 b to the column 11. Subsequently, the both end webs 2a and 2b of the beam according to the present invention are inserted into the gusset plate 12b fixed to the column 11 and fitted together. That is, the gusset plate 12b is sandwiched between the webs 2. Next, a plurality of bolts (not shown) are inserted in the direction of the web 2b from the bolt hole side of the web 2a through the bolt holes of the gusset plate 12b, and a plurality of nuts (not shown) are tightened and fixed on the web 2b side. . In short, by adopting a structure that can cope with bending stress, it is possible to create a highly reliable gate-type frame structure that is capable of exhibiting persistent high performance and can be rationally designed with an emphasis on earthquake resistance and durability. The shape and dimensions of the gusset plate 12 are determined by various conditions at the time of design, but the plate thickness is about 4.5 to 9.0 mm.

(Example 2)
5A and 5B are schematic views showing a second embodiment of the lightweight H-beam for composite beams according to the present invention, in which FIG. 5A is a cross-sectional view taken along the line AA, and FIG. 5B is a cross-sectional view taken along the line BB. In this example, the flange 1, the web 2a, the web 2b, the lip 3, the reinforcing plate 4, the wood 6, the caulking fixing 7, the stiffener 8a, the stiffener 8b, the screw hole 9 and the screw 10 are formed. Hereinafter, it demonstrates along this.

FIG. 6 is an explanatory view showing an example of the shape of the substantially light groove-shaped steel of the second embodiment and the shape of the reinforcing plate 4, (a) a schematic view of the substantially light groove-shaped steel, and (b) reinforcement. It is a schematic diagram of a plate. First, a substantially light groove-shaped steel is produced. Before forming a pre-plated long steel plate, drilling of screw holes 9 having a diameter of about 4.5 mm is provided at intervals of about 300 mm in the vicinity of both ends of the long side. I do. Next, as shown in FIG. 2A, the front end of the U-shaped upper flange 1 is directed upward from the end of the lower flange 1 along the longitudinal direction of the long plate steel plate processed with screw holes in the previous step. A shape having a lip 3 bent downward at a right angle is formed. Subsequently, as shown in FIG. 6A, the rectangular tube drawing of the stiffener 8 is performed at intervals of about 250 to 400 mm in the longitudinal direction. The size is formed according to processing conditions during manufacturing and various conditions during stress design.

The reinforcing plate 4 is formed with screw holes in the vicinity of both side ends of the plated long steel plate before being formed. As shown in FIG. 5, the reinforcing plate 4 has a substantially H-shaped lower flange 1 and Since it is located on the inner diameter of the lip 2, the screw hole pitch is matched with the screw hole 9 of the lip 2, and the screw diameter is slightly larger than the lip screw hole in consideration of manufacturing errors. In the next step, a U-shaped cross-sectional shape shown in FIG. The size is determined by various conditions at the time of design. As standard values, the plate thickness is about 1.6 to 6.0 mm, the web size is about 95 to 195 mm, the flange size is about 40 to 95 mm, and the length is about 3 to 6 m. It is.

Subsequently, the substantially light groove-shaped steel produced as described above is assembled together into a substantially H-shape. First, as shown in FIG. 5, the webs 2a and 2b of the substantially light grooved steels arranged back-to-back are aligned, and the alignment positions of the stiffeners 8a and 8b are also confirmed, and about 250 to 400 mm in the longitudinal direction. The caulking process 7 is performed in parallel at an interval of 5 mm to form a substantially H-shape. Next, as shown in FIG. 5, a U-shaped reinforcing plate 4 is fitted into the U-shaped space of the substantially H-shaped lower flange 1 and lip 2. Thereby, the lightweight H-section steel for synthetic beams firmly reinforced and fixed is manufactured. The lightweight H-shaped steel for composite beams has a web size of about 150 to 350 mm, a flange size of about 100 to 200 mm, and a length of about 3 to 6 m.

By reinforcing the lower flange side of the substantially H shape with a U-shaped reinforcing plate 4, the beam formation can be reduced. As a result, the space under the beam of the building can be slightly increased. Further, in the case of a load bearing wall design that requires a steel brace, the plate piece 5 and the gusset plate 12a can be inserted between the webs 2.

FIG. 7 is a cross-sectional view illustrating an example of a flow and a joining form for explaining a manufacturing process of caulking and fixing a superposed portion. (A) is sectional drawing before the process in which the web 2a and the web 2b are located, (b) is sectional drawing of the condition where the web 2a and the web 2b are deep-drawn, (c) is said applicable part. Is a cross-sectional view at the moment when the caulking is fixed 7, and (d) is a cross-sectional view at the time of completion of the joint. Moreover, (e) is an enlarged longitudinal sectional view showing the caulking fixing portion 7, which will be described below.

As shown in FIG. 7 (c), a punch 14 having a circular cross section is pushed toward the die 15, and the corresponding portion is pressed and deformed to form a circular recess 7a shown in FIG. 7 (e) and project on the opposite side. Part 7b is formed. At the same time, the outer locking flange 7c is formed. That is, as shown in FIGS. 7 (c) and (e), the peripheral portion of the protruding portion 7b is deformed by the function of the die 15, and the corresponding section of the web 2b is circular and spreads outward. An outer locking flange 7c is formed. Therefore, the corresponding part of the web a bites into the web 2b side, and the web 2a and the web 2b are combined. Thereby, the effect which can fully ensure the intensity | strength of the beam material which coped with shearing is acquired. The size of clinch caulking is about 8 to 10 mm in diameter.

The clinch caulking 7 has been shown as a representative for joining the web 2a and the web 2b. However, the present invention is not limited to this, and a sufficient contact area between the web and the plate piece can be secured, and the stress to be satisfied. If the coping strength can be obtained, other joining methods can be applied. For example, burring caulking, blind rivets, bolts, screws and the like can be mentioned.

(Example 3)
FIG. 8 is a schematic view showing an example of a lightweight H-section steel for composite beams according to a third embodiment of the present invention. In this example, it is composed of a flange 1, a flange 1 a, a web 2, a lip 3, a wood 6, a caulking fixing 7, a screw hole 9 and a screw 10. Hereinafter, it demonstrates along this.

As shown in FIG. 8, the light beam H-shaped steel for composite beam of the third embodiment is manufactured. First, screw holes 9 having a diameter of about 4.5 mm are provided at intervals of about 300 mm in the vicinity of both ends of the plated long steel plate. Drill holes. Next, the lower flange 1 and the web 2 are bent in a substantially inverted T-shaped cross section from the vicinity of the center of the short side of the plated long steel plate that has been drilled in the previous step. Subsequently, the web 2 is bent at a right angle to the back surface to produce an upper flange 1a, and further formed into a shape having a lip 3 protruding from the flange 1a.

Next, the substantially light H-shaped steel webs 2 produced as described above are fixed to each other. As shown in FIG. 8, the contact state between webs is confirmed, and caulking processing 7 is performed in parallel at intervals of about 250 to 400 mm in the longitudinal direction. Thereby, the light weight H-section steel for synthetic beams fixed firmly is manufactured. The lightweight H-shaped steel for composite beams has a web size of about 150 to 350 mm, a flange size of about 100 to 200 mm, and a length of about 3 to 6 m.

FIG. 9 is a cross-sectional view illustrating an example of a flow and a joining form for explaining a manufacturing process for caulking and fixing a superposed portion. (A) is sectional drawing before the process in which the some web 2 is located, (b) is sectional drawing of the condition where the several web 2 is deep-drawn, (c) is the said applicable part being crimped FIG. 7 is an instantaneous cross-sectional view of the fixed portion 7, and FIG. Moreover, (e) is an enlarged longitudinal sectional view showing the caulking fixing portion 7, which will be described below.

As shown in FIG. 9 (c), a punch 14 having a circular cross section is pushed toward the die 15, and the corresponding portion is pressed and deformed to form a circular recess 7a shown in FIG. 3 (e) and project on the opposite side. Part 7b is formed. At the same time, the outer locking flange 7c is formed. That is, as shown in FIGS. 9 (c) and 9 (e), each plate thickness cross section is deformed by the function of the die 15, and the corresponding portions of the plurality of webs 2 are circular and outward. The outer locking flange 7c is formed. Accordingly, the corresponding part on the right side of the web 2 bites into the left side of the web 2 so that the two webs 2 are combined. Thereby, the effect which can fully ensure the intensity | strength of the beam material which coped with shearing is acquired. The size of clinch caulking is about 8 to 10 mm in diameter.

In addition, clinch caulking 7 is shown as a representative for joining a plurality of webs 2, but the present invention is not limited to this, and a sufficient contact area between the web and the plate piece can be ensured, and satisfactory stress handling strength can be ensured. If it can be obtained, other joining methods can be applied. For example, burring caulking, blind rivets, bolts, screws and the like can be mentioned.

As described above, according to the lightweight H-shaped steel for composite beams according to the present invention, by utilizing different characteristics by combining different materials, it is possible to achieve both strength securing and utilization of small-diameter low-strength tree species such as thinned wood. This is a possible composite beam, and it has a high cross-sectional performance and low cost, so it can be rationally designed with an emphasis on earthquake resistance and durability. The benefits to society are extremely large.

DESCRIPTION OF SYMBOLS 1 Flange 1a Flange 2 Web 2a Web 2b Web 3 Lip 4 Reinforcement processing plate 5 Plate piece 6 Wood 7 Caulking processing 7a Circular recessed part 7b Circular protrusion part 7c Outer locking flange part 8a Stiffener
8b Stiffener
9 Screw hole 10 Screw 11 Pillar 12a Gusset plate 12b Gusset plate 13 Brace 14 Punch 15 Die

Claims (4)

A light grooved steel for beam material, which is formed by bending a pre-plated steel plate along the longitudinal direction, and extends upward from the top end of the upper flange and downward from the end of the bottom flange. In a substantially light grooved steel having screw holes at predetermined intervals on existing lips, a plate piece is inserted at a predetermined interval in the longitudinal direction between the backs of the substantially light grooved steel webs. The webs and the plate pieces are integrated and fixed by caulking, and the cross section is formed in a substantially H shape, and wood is inserted between the lips extending from the upper and lower flanges. A light-weight H-shaped steel for composite beams, wherein the wood is fixed with screws from screw holes provided in the frame. A light groove steel for beam material formed by bending a pre-plated steel plate along the longitudinal direction, and the light groove steel is a hat-shaped protrusion at a predetermined interval on the web. In the substantially light grooved steel having a lip extending upward from the tip of the upper flange and downward from the tip of the lower flange, the lip having screw holes at a predetermined interval. The web backs of the grooved steel are overlapped and fixed in the longitudinal direction at predetermined intervals with caulking, and a U-shaped reinforcing plate is inserted into the lower flange in whole or in part along the longitudinal direction, Is formed in a substantially H shape, and between the lips extending from the upper and lower flanges, wood is inserted, and the wood is fixed with screws through screw holes provided in the lip, and the lightweight H shape for synthetic beams steel. A pre-plated steel plate is bent, the lower flange and web part of the light H-shaped steel for the beam material are double layered, and the upper flange and the lip extending upward from the tip of the upper flange part are In a substantially light H-section steel formed by a single-layer plate and having screw holes at predetermined intervals in the lip, the webs are fixed to each other by caulking in the longitudinal direction at predetermined intervals. A lightweight H-section steel for composite beams, characterized in that wood is inserted between lips extending from an upper flange of the shape steel and the wood is fixed with screws from screw holes provided in the lips. Light grooved steel for beam material, which is formed by bending a pre-plated steel plate, superimposes a pair of webs in a substantially H shape and crimps them together to integrate the beam members without welding. The lightweight H-section steel for composite beams according to claim 1, which relates to a method for producing a substantially lightweight H-section steel characterized by:

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