JP5943416B2 - Composite structure of steel and wood material - Google Patents

Description

  The present invention relates to a new structure combined with steel because of the necessity of spreading wood materials to the construction field such as structural materials.

  Based on the concept of a building structure that is friendly to the global environment, we have pursued the possibility of a new structure that combines steel and wood materials, utilizing steel structure technology. The use of wood materials is one of the ways to actively promote forest growth and global environmental improvement because it will prevent the aging of forest stock and become a fixed source of carbon.

  Due to the durability and heterogeneity of wood materials, most conventional wooden buildings have 3 stories or less, and there are limitations on the span of application and the durability. However, in recent years, the momentum for starting large-scale construction using a lot of wood has been increasing.

  Conventionally, as shown in Non-Patent Document 1, H-shaped steel is made of a larch laminated material having a thickness of about 60 mm and covers a column and a beam (the author has called a hybrid member), and 600 of them are used. The wooden structure building used above is shown. The hybrid material not only for the column but also for the beam is joined in the longitudinal direction through a conventionally known joint plate, and the joining between the column and the beam is not shown in the figure, but from the view of Photo 1, it is welded. Therefore, it can be recognized that the building has a rigid frame structure.

  Moreover, as shown in Patent Document 1, a plurality of flame-retardant wood materials are covered with a bolt or a screw around a steel member around a H-shaped steel as a fireproof coating material. Further, the wooden member is also used as a reinforcing member for the steel member by fixing the steel member and the wooden member in close contact.

JP 2006-89999 A

Page 52 of Nikkei BP “Nikkei Architecture” 2011 11-10 “Japan's largest wooden structure building”

  In the non-patent document 1 described above, the H-shaped steel is a structure covered with a wooden laminated material, but this laminated material is used as a fireproof coating of steel material and is not used as a material having structural strength, Other than that, it was limited to the use of the texture of wood materials.

  In the above-mentioned Patent Document 1, there is a description that the wooden member is used as a reinforcing member for the steel member, as in Non-Patent Document 1, but due to the non-uniformity of the wooden material, the use as the reinforcing member is limited. It was.

  The present invention provides a structure having a damage control structure using a buckling-restrained brace as a damping member from the viewpoint of utilizing a wood material and extending the life of a building and using it as a reuse material. The purpose is that.

  The composite structure of steel and wood material according to the present invention is in a structure, and a cross is a cross H-shaped steel having a cross-shaped cross section formed by welding a pair of T-shaped steels to both sides of a H-shaped steel web. , H-beams are used for the beams, and wooden materials are attached to the four cross-shaped H-beams on the four flanges along the longitudinal direction thereof by high-strength bolts, welding, or a combination thereof. The beam H-shaped steel is attached so as to sandwich a pair of wood materials on both sides along the longitudinal direction thereof, and the cross-shaped H-shaped steel for the column and the H-shaped steel for the beam are joined together. An end plate is welded to the end face of the H-shaped steel for the beam, and this end plate is screwed to the flange of the cross-shaped H-shaped steel for the column with a high-strength bolt directly or via an inclusion. At the joint of the cross H-section steel and the H-section steel for the beam, a filler wood material is attached later. Lies in the provision of the buckling-restrained braces between the H-beam for the a cross H-shaped steel beams for at least the pillars (claim 1).

  As a result, the frame is made of a cross H-shaped steel having a cross-shaped cross section formed by welding a pair of T-shaped steels to both sides of the H-shaped steel web for the column. It will be.

  The cross H-shaped steel for the column has wooden materials attached on the four flanges provided on it, and the H-shaped steel for the beam has wooden materials attached on both sides. The steel is not exposed and the wood material appears on the outer surface, creating the texture of wood. Then, the covering thickness of the wood material is designed to burn out.

  The cross H-shaped steel for the column and the H-shaped steel for the beam are joined by using an end plate welded to the end surface of the H-shaped steel for the beam, and using a high-strength bolt, By screwing to the flange, the beam-to-column connection is not a rigid connection but a semi-rigid connection. In medium or large-scale earthquakes, the connection rotates as a fulcrum, and a cross H-shaped steel for columns and an H-shaped for beams Steel damage is prevented.

  Since the cross H-shaped steel for the column and the H-shaped steel for the beam are joined by high-strength bolts, the wood material is not pre-attached to the part. Attach the filling wood material.

Since a buckling-restrained brace is provided between the H-shaped steel for the beam and the cross-shaped steel for the column, the buckling-restraining brace is activated during a middle or large-scale earthquake, and the cross-shaped H of the column steel,
Plasticization of the H-shaped steel of the beam is prevented. For this reason, cross H-section steel and H-section steel become elastic behavior and are easy to use as a reuse material.

  The cross-shaped H-shaped steel for the column is formed by cutting a web of the H-shaped steel along the longitudinal direction to form two T-shaped steels, and arranging the two T-shaped steels on both sides of the H-shaped steel. The cut end surfaces of the T-shaped steel webs are welded to the H-shaped steel webs to form a cross-shaped cross section.

For this reason, if the steel for the column is only H-shaped steel, there is directionality as a load resistance element,
It can resist in two directions by welding T-shaped steel. T-shaped steel can be made by cutting H-shaped steel, and also promotes its use as a reuse material. Moreover, since the cross H-shaped steel for the column has four flanges, it can be joined from four directions with the H-shaped steel for the beam, and even in that joining, high strength bolt joining can be performed. .

The beam is attached with a pair of wood materials from both sides of the H-shaped steel, and a hole is formed in a direction perpendicular to the longitudinal direction , a coupling bolt is disposed in the hole, and a nut is screwed into the coupling bolt. The wood material is fixed to the H-shaped steel, and further, a filler for protecting the coupling bolt is put in the hole (Claim 3).

  For this reason, the wood material can be firmly fixed to both sides of the H-shaped steel for the beam. There is a filler to prevent heat from being transmitted from the bolt in the event of a fire, which prevents heat transfer from the bolt to the H-section steel.

Joining the flange of the cross H-shaped steel for the column and the flat plate end plate welded to the end of the H-shaped steel for the beam, a predetermined number of holes are formed in the end plate, Preferably, a predetermined number of holes are formed, a high-strength bolt is inserted from one of the two holes, and a nut is screwed onto the tip of the high-strength bolt protruding from the hole (Claim 4).

  For this reason, the cross-shaped H-shaped steel for the column and the H-shaped steel for the beam can be easily fastened using the respective holes formed in the end plate and the flange with high-strength bolts. In this case, the joint between them is a semi-rigid joint.

The column covers the periphery of the cross H-shaped steel with a plurality of wooden materials, and without fixing the cross H-shaped steel and the wooden materials, only the joint portions of the plurality of wooden materials are fixed with an adhesive or a fixing bracket. Therefore, it is bonded by both of them (claim 5). For this reason, the wooden material buckles and stiffens the cross-shaped H-shaped steel, so that no great deformation is caused even if an external force is applied.

The beam is covered with a pair of wooden materials from both sides of the H-shaped steel, and without fixing the H-shaped steel and the wooden material, only a joint portion of the pair of wooden materials is bonded with an adhesive or a fixing bracket, and It is in joining by both (Claim 6). For this reason, the effect | action which a wooden material buckles and stiffens H-section steel is acquired.

  As described above, according to the first aspect of the present invention, the pillar constituting the frame is a cross-shaped H-shaped steel having a cross-shaped cross section in which a pair of T-shaped steel is welded to both sides of the web of the H-shaped steel. Therefore, it has sufficient structural strength as a pillar material.

  The cross H-shaped steel for the column has four flanges around it, and the wooden material is attached to it, and the wooden material is also attached to the H-shaped steel for the beam. In addition, the steel is not exposed to the beam, and the wood material appears and has the effect of bringing out the texture of the material. The covering thickness of the wood material can protect not only the cross-shaped H-shaped steel but also the H-shaped steel from fire by designing a stagnation.

  To join the cross-shaped steel for the column and the H-shaped steel for the beam, the end plate provided on the end face of the H-shaped steel for the beam is screwed to the flange of the cross-shaped H steel for the column with a high-strength bolt. By stopping, the beam-to-column connection is made semi-rigid, and in the case of a medium or large-scale earthquake, the connection is rotated as a fulcrum to prevent damage to not only the cross H-shaped steel for the column but also the H-shaped steel for the beam. be able to.

  Since the wood material is not pre-attached to the joint between the cross-shaped steel for the column and the H-shape steel for the beam, the wood material is attached on the back after joining the two, and the wood material is represented on the outer surface Can do.

  Since a buckling-restrained brace is provided between the H-shaped steel for the column and the H-shaped steel for the beam, the buckling-restraining brace is activated during an intermediate or large-scale earthquake, and the cross for the column Plasticization of not only H-section steel but also H-section steel for beams is prevented. For this reason, the cross-shaped H steel and the H-shaped steel have an advantage of ensuring the use as a reuse material.

  According to the second aspect, since the T-shaped steel is welded to the cross-shaped H-shaped steel for the column, there is an advantage that the proof stress can be improved, and the T-shaped steel is produced by cutting the H-shaped steel. be able to. Promote the use of H-shaped steel reuse materials. Moreover, since the cross H-section steel for columns has four flanges, it can also be possible to join from four directions of the H-section steel for beams.

  According to claim 3, the wooden material is firmly fixed to both sides of the H-shaped steel, and the wooden material not only burns but also the filler is inserted into the bolt hole. It has the effect of preventing heat transfer from the bolt to the H-section steel.

  According to claim 4, the cross H-shaped steel for the column and the H-shaped steel for the beam are formed in the hole formed in the flange of the cross H-shaped steel and the end plate of the end of the H-shaped steel by high-strength bolts. It can be easily fastened using the holes of the holes and can be a semi-rigid joint.

  According to Claims 5 and 6, the cross-shaped H-shaped steel for the column and the H-shaped steel for the beam are entirely covered with the wood material, and the cross-shaped H-shaped steel for the column and the H-shaped steel for the beam and the wood Since the material is not fixed, the wood material has an effect of buckling and stiffening the cross H-shaped steel and the H-shaped steel for the beam.

It is a front view which shows an example of the interior arrangement | positioning of the composite structure of the steel and wood material which concerns on this invention. It is a top view of a pillar. It is a perspective view same as the above. It is the perspective view which showed the other example of the pillar. The explanatory diagram of the manufacturing process of the cross H-section steel for the column is shown, (a) is a process of cutting the H-section steel in the longitudinal direction to make a T-section steel, (b) a pair of T-sections on both sides And (c) a step of welding a pair of T-shaped steels to the H-shaped steel to make a cross-shaped H-shaped steel having a cross-shaped cross section. The explanatory drawing of the manufacturing process of a beam is shown, (a) shows the process of arranging a pair of wood materials on both sides of the H-section steel, and (b) shows the attachment process so that the pair of wood materials are sandwiched between the H-section steel. It is a perspective view which shows the other example of a beam. It is a perspective view which shows the joining process of a pillar and a beam, and shows the joining state of cross H-shaped steel for pillars, and H-shaped steel for beams. It is a perspective view of the state where the filling wood material was attached to the part which wood material is not covered after joining cross H-shape steel for pillars, and H-shape steel for beams. It is a front view which shows the other example of interior arrangement | positioning of the composite structure of the steel and wooden material which concerns on this invention.

  In FIG. 1, a composite structure 1 using columns and beams of a composite structure of steel and wood material is shown. The pillar 2 used in the composite structure 1 is a cross H-shaped steel (which will be described in detail later) in which a pair of T-shaped steel is welded to both sides of an H-shaped steel web to form a cross-shaped cross section. The beam 3 (which will be described in detail later) is made of H-shaped steel, and both the pillars 2 and the beam 3 are attached with a wooden material on the outer periphery thereof. Therefore, the composite structure 1 brings out the texture of wood.

  The column 2 and the beam 3 have a damage control structure that is a semi-rigid joint. Because of this damage control structure, a well-known buckling restrained brace 4 is provided between the column 2 and the beam 3 to compensate for insufficient proof stress at the joint. This buckling-restraining brace 4 has a brace core material that is plastically deformed, and connecting portions at both ends of the core material, and is restrained by the underlying concrete and the steel material that encloses it in order to prevent buckling when a compression load is applied The connecting members at both ends of the core member are connected to the gusset plates 5 and 6.

  The gusset plate 5 is connected to the cross H-shaped steel of the pillar 2 (reference numeral 20 described below) and the H-shaped steel of the lower beam 3 (reference numeral 37 described below), and the gusset plate 6 is Are connected to the H-shaped steel (reference numeral 37 described below) of the beam 3 on the upper floor. 7 is a slab and 8 is a beam. As a matter of course, a wooden material is covered on the steel material that encloses the core material.

  As another example provided between the column 2 and the beam 3 of the buckling-restrained brace 4, as shown in FIG. 10, the gusset plate 5 is connected only to the cross H-shaped steel (reference numeral 20 described below) of the column 2. The gusset plate 6 is connected to the H-section steel (reference numeral 37 described below) of the beam 3 on the upper floor as in the above example. As described above, the attachment position of the buckling restraint brace 4 has an advantage of making the opening of the window easy to use. However, the effect of the buckling restrained brace 4 can be extracted.

  Next, a specific configuration of the column 2 and the beam 3 and an example of joining the column 2 and the beam 3 will be described. 2 and 3 are a plan view and a perspective view of the pillar 2, and FIG. 4 is a perspective view of a modified example of the pillar 2. FIG. 5 shows manufacturing steps (a), (b), (c) of the pillar 2. )It is shown. The column 2 is constructed by welding a pair of T-section steels 17 and 17 on both sides of the web 11 based on the H-section steel 10 composed of the web 11 and the flanges 12 formed at both ends thereof in order to improve the structural strength. Has been.

  The T-section steel 17 is produced by cutting along the cutting line 16 from the center in the longitudinal direction of the web 15 of the H-section steel 14 as shown in FIG. The cut web 15a and the flange 19 are included. The H-section steel 14 used here shows an example in which a reused H-section steel is used, and promotes the use of reuse materials.

  The T-shaped steel 17 formed by cutting is disposed on both sides of the H-shaped steel 10 as shown in FIG. 5B, and the cut end face 18 of the web 15a faces the web 11 of the H-shaped steel 10, The fillet is then welded. When the pair of T-shaped steels 17 are welded, as shown in FIG. 5C, a cross H-shaped steel 20 having a cross-shaped cross section (hereinafter referred to as a cross H-shaped steel for a column) is obtained.

The cross H-shaped steel 20 for a column has a configuration having four flanges 12, 12 and 19, 19. Then, the wood material 22 is further adhered along the longitudinal direction on the four flanges 12, 12, 19, 19 so as to cover the whole. The woody material 22 used here is cedar, cypress, larch, or a laminated material thereof. These woody materials 22 may be fixed to the flanges 12 and 19 by inserting high-strength bolts 24 into holes 23 formed from the body and screwed into holes formed in the flange 19 (not shown). 26 may be adhered. Further, the joining with the high strength bolt 24 may be combined. By being configured in this manner, the wood material 22 appears on the entire circumference of the cross-shaped H-shaped steel 20 for pillars, and a woody texture is created. Reference numeral 25 denotes a filler.

  FIG. 4 shows another example in which the wooden material 22 is attached to the cross-shaped H-shaped steel 20 for a pillar. In this example, the wooden material 22 joins only the wooden materials 22 to cover the cross H-shaped steel 20 for pillars, thereby buckling and stiffening the cross H-shaped steel 20. Therefore, the wood material 22 is joined by the wood screw 27 or the adhesive 28 and both, and is not fixed to the flanges 12 and 19 of the cross H-shaped steel 20. The other portion, the cross H-section steel 20, is the same as the cross H-section steel shown in FIG.

  Since the covering thickness of the wood material 22 is a fireproof coating of steel, it is 45 mm for the 1-hour fire resistance of steel and 90 mm for the 2-hour fire resistance.

  6A and 6B show the manufacturing steps (a) and (b) of the beam 3. The beam 3 is sandwiched from both sides along the longitudinal direction of the H-shaped steel 37 (hereinafter referred to as H-shaped steel for the beam). It is comprised from a pair of woody material 40 attached to. The beam-shaped H-shaped steel 37 is a rolled product made up of a web 35 and flanges 36 connected to both ends of the web 35. Holes 38 are formed in the web 35 in a perpendicular direction.

  The wood material 40 is a plate material having a rectangular cross section, and is made of the same material as the wood material 22 such as cedar, cypress, larch, and the like, and their collective molding. The wood material 40 is formed with a pair of (longitudinal) long grooves 41 in the longitudinal direction on one surface (H-shaped steel side). The long groove 41 has a width and depth sufficient to insert the flange 36 of the beam H-shaped steel 37. Further, a hole 42 is formed at an appropriate position of the wood material 40 in a direction perpendicular to the longitudinal direction, and this hole 42 corresponds to the position of the hole 38 of the web 35.

  FIG. 6B shows an example in which the wooden material 40 is attached to both sides of the H-shaped steel 37 for the beam so that the long groove 41 of the wooden material 40 is formed in the H-shaped steel 37 for the beam. The flange 36 is inserted. Thereby, the H-shaped steel 37 for the beam is completely covered with the wood material, and the coupling bolt 44 is inserted from the hole 42 of the wood material 40, and the nut 45 is screwed and fastened to the projecting tip. When the fastening of the connecting bolt 44 is completed, the non-combustible filler 46 is inserted. In addition, since the covering thickness of the wooden material 40 becomes the same fireproof covering of steel as the said wooden material 22, it is a burning design. In addition, the adhesive agent 47 is apply | coated to the joining surface, and a pair of woody material 40 is joined.

  FIG. 7 shows another example in which the wood material 40 is attached to the H-section steel 37. In this example, the wooden material 40 joins only the wooden materials 40 and covers the H-shaped steel 37, thereby buckling and stiffening the H-shaped steel 37. For this reason, the joining surface of the wood material 40 is lap joined, and is joined to the joining surface by an adhesive or the wood screw 33 and both, and is not fixed to the H-shaped steel 37.

  FIG. 8 shows a joining example of the column 2 and the beam 3. Since the damage control structure using the buckling-restrained brace is adopted as the vibration damping member in the composite structure 1 of steel and wood material, the joint portion is not rigid joint but semi-rigid joint.

  The connection between the column 2 and the beam 3 is due to the strength problem caused by the quality of the wooden materials 22 and 40, and the steel and the wooden material cannot be integrated completely. It becomes joining with the shape steel 37. An end plate 48 is welded to the end face of the beam H-shaped steel 37 at a right angle to the longitudinal direction, and a plurality of holes 49 are formed in the end plate 48 with a predetermined pitch.

  In contrast, a plurality of holes 50 are formed in the flange 12 of the cross-shaped H-shaped steel 20 for a column. The holes 50 correspond to the holes 49 and are formed with a predetermined pitch. A high-strength bolt 52 is inserted into the hole 50 from the back side of the flange 12, and the tip thereof is inserted into a hole 49 formed in the end plate 48, and is screwed with a nut 53 to form an H-shaped steel 37 for a beam. Is coupled to the flange 12 of the column 2. The state before joining is shown on the right side of FIG. 8, and the state after joining is shown on the left side of FIG. In order to obtain a semi-rigid joint, the rotational rigidity of the semi-rigid joint can be arbitrarily determined by appropriately selecting the length, diameter, and number of high-strength bolts 52 used. Similar effects can be obtained by inserting inclusions between the flange 12 of the cross-shaped H-shaped steel 20 for the column and the end plate 48 of the H-shaped steel 37 for the beam.

  Reference numeral 5 denotes a gusset plate for a buckling-restrained brace shown in FIG. 1 and described in detail in FIG. 8, and has a hole for bolt connection to the flange 12 of the column 2 and the H-shaped steel 37 for the beam. Correspondingly, holes 58 and 59 are formed in the flange 36 of the cross-shaped H-shaped steel 20 for the column 2 and the flange 36 of the H-shaped steel 37 for the beam.

  As described above, even if the cross H-shaped steel 20 for the column and the H-shaped steel 37 for the beam are joined by the high-strength bolt 52, the steel portion is exposed as shown in FIG. As shown in FIG. 9, filled wood materials 62 and 63 made of wood material are attached to the portion. The structure corresponds to the outer shape of the cross H-shaped steel 20 for the pillar and the H-shaped steel 37 for the beam, and the outside is formed without any sense of incongruity in the above-described wood materials 22 and 40, respectively. A cover 65 covers the gusset plate 5 and is made of a wood material.

DESCRIPTION OF SYMBOLS 1 Composite structure 2 Column 3 Beam 4 Buckling restraint brace 5 Gazette plate 6 Gazette plate 10 H-section steel 11 Web 12 Flange 14 H-section steel 15 Web 15a Cut web 17 T-section 18 Cut end face 19 Flange 20 Cross H Shaped steel 22 Wood material 35 Web 36 Flange 37 H shape steel 38 Hole 40 Wood material 41 Long groove 42 Hole 44 Connection bolt 45 Nut 46 Filler 48 End plate 52 High strength bolt 53 Nut 62, 63 Filled wood material

Claims (6)

In the structure, cross H-shaped steel with a cross-shaped cross section is formed by welding a pair of T-shaped steel on both sides of the H-shaped steel web for the column, and H-shaped steel is used for the beam.
In the cross H-shaped steel for the column, a wood material is attached along the longitudinal direction on four flanges,
The beam H-shaped steel is attached so as to sandwich a pair of wood materials on both sides along its longitudinal direction,
In joining the cross H-shaped steel for the column and the H-shaped steel for the beam, an end plate is welded to an end surface of the H-shaped steel for the beam, and the end plate is directly or via an inclusion. A high-strength bolt is screwed to the flange of the cross H-shaped steel for use, and a filler wood material is attached to the joint between the cross H-shaped steel for the column and the H-shaped steel for the beam. A composite structure of steel and wood material, wherein at least a buckling-restrained brace is provided between the cross-shaped H-shaped steel for the column and the H-shaped steel for the beam.   The cross-shaped H-shaped steel for the column is formed by cutting a web of the H-shaped steel along the longitudinal direction to form two T-shaped steels, and arranging the two T-shaped steels on both sides of the H-shaped steel. 2. A composite structure of steel and wood material according to claim 1, wherein the cut end surfaces of the T-shaped steel webs are welded to the H-shaped steel webs to form a cross-shaped cross section. The beam is attached with a pair of wood materials from both sides of the H-shaped steel, and a hole is formed in a direction perpendicular to the longitudinal direction , a coupling bolt is disposed in the hole, and a nut is screwed into the coupling bolt. the woody material causes fixed to H-section steel, further composite structure of steel and wood material according to claim 1, wherein the filler is placed to protect the coupling bolt in the hole. Joining the flange of the cross H-shaped steel for the column and the flat plate end plate welded to the end of the H-shaped steel for the beam, a predetermined number of holes are formed in the end plate, The steel according to claim 1, wherein a predetermined number of holes are formed, a high-strength bolt is inserted from one of the holes, and a nut is screwed into a tip of the high-strength bolt protruding from the hole. A composite structure of wood material.   The pillar covers the periphery of the cross H-section steel with a plurality of wood materials, and joins only the joint portions of the plurality of wood materials without fixing the cross H-section steel and the wood material. A composite structure of steel and wood material according to claim 1.   The beam is covered with a pair of wood materials from both sides of the H-section steel, and only a joint portion of the pair of wood materials is joined without fixing the H-section steel and the wood material. A composite structure of steel and wood material according to 1.

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