JP2016132907A - Steel material joint structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a steel material joint structure capable of connecting an existing steel material with a new steel material, maintaining sufficient strength, on an existing building structure, without welding or forming a through-hole on the existing steel material.SOLUTION: A steel material joint structure 1 of the present invention includes an existing steel material 3 having a first surface 31a and a second surface 32a, a new steel material 4, a first fixing plate 5 disposed on the new steel material 4, on a side with the first surface 31a, a second fixing plate 6 sandwiching a structure 2 with the first fixing plate 5, and a tendon 9 connecting the first fixing plate 5 with the second fixing plate 6. An adhesive layer 7 is disposed between the first fixing plate 5 and the structure 2. Both edges of the first fixing plate 5 and the second fixing plate 6 protrude outward respectively from both edges of the first surface 31a and the second surface 32a. The first fixing plate 5 is connected with the second fixing plate 6 by the tendon 9 at protruded regions 5a and 6a.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a steel material joining structure in which an existing steel material is joined directly or indirectly to an existing steel material in an existing building structure.

  In order to improve the seismic performance of building structures such as steel structures, damping dampers and braces are provided between the upper and lower beams and the left and right columns. Damping dampers and braces are connected between steel members joined to the upper and lower beams and left and right columns. When joining steel materials to upper and lower beams and left and right columns, a welding method (Patent Document 1) and a bolt fastening method (Patent Document 2) are generally employed.

  For example, in the joining method by bolt fastening in Patent Document 2, as shown in FIG. 8, the flange 103 a of the split tee 103 fixed to the flange 102 a of the H-shaped steel beam 102 and the one side 104 a of the reinforcing hardware 104 are H The flange 101a of the section steel column 101 is sandwiched, and the high strength bolt 105 inserted through the through hole penetrating the flange 103a of the split tee 103, the flange 101a of the H section steel column 101, and one side 104a of the reinforcing hardware 104 is fastened. An H-shaped steel beam 102 is joined to the H-shaped steel column 101.

JP 2000-274108 A JP 11-229493 A

  Here, the welding joining method not only requires equipment and skill, but also involves danger because it uses fire as a heat source to be applied. For example, in the case where seismic reinforcement work is applied to an existing building structure, when a newly installed steel material is welded to the existing steel material, there is a possibility that other facilities provided in the existing building structure may catch fire. Moreover, in the joining method by bolt fastening, it is necessary to newly provide a through hole in the existing steel material, and the through hole may become a defect of the existing steel material, which may be a starting point of occurrence of a crack.

  The present invention has been made in view of the above problems. In an existing building structure, an existing steel material having sufficient strength without welding an existing steel material and a new steel material and without providing a through hole in the existing steel material. An object of the present invention is to provide a steel material joining structure capable of joining a newly installed steel material.

  The steel material joining structure of the present invention is a steel material joining structure in which an existing steel material is joined to a structure including an existing steel material in an existing building structure, and extends in a first direction and is substantially perpendicular to the first direction. An existing steel material having a first surface and a second surface that are spaced apart from each other in a direction and arranged substantially in parallel; a new steel material joined to the structure including the existing steel material; and the new steel material, A first fixed plate disposed on one surface side, a second fixed plate disposed on the second surface side and sandwiching the structure in the second direction together with the first fixed plate, and the first fixed plate And a tension member that connects the second fixing plate in the second direction, and an adhesive layer is disposed between the first fixing plate and the structure, and the first direction and the second direction are arranged in the first direction. The first solid in a substantially vertical third direction; Both ends of the plate protrude from both ends of the first surface in the third direction, both ends of the second fixed plate in the third direction protrude from both ends of the second surface in the third direction, and the first The first fixing plate and the second fixing plate are connected to each other by the tension material in the protruding regions of the fixing plate and the second fixing plate.

  Moreover, the said existing steel material is H-section steel, and the insertion member which can oppose the compressive force which the said existing steel material receives in the said 2nd direction is inserted between the said 1st surface and the said 2nd surface. It is preferable.

  The first fixing plate includes an integrated plate member fixed to the newly installed steel material, and a separating plate member separated from the newly installed steel material and the integrated plate member, and the integrated plate member and the separating plate member are The adhesive that is bonded to the integral plate member of the adhesive layer when the adhesive layer receives a tensile force due to the new steel member receiving a force in the second direction with respect to the structure. A portion of the layer mainly resists the tensile force, and the adhesive layer receives a shear force due to the new steel material receiving a force in the first direction against the structure. Preferably, the portion of the adhesive layer bonded to the integral plate member and the portion of the adhesive layer bonded to the separation plate member are arranged to oppose the shearing force. Arbitrariness.

  The first fixing plate is separated from the at least two integrated plate members spaced apart in the first direction and fixed to the new steel material, the new steel material and the at least two integrated plate members, and the at least 2 And at least one separation plate member disposed between the two integral plate members.

  According to the present invention, in an existing building structure, existing steel and new steel can be joined with sufficient strength without welding existing steel and new steel, and without providing a through hole in the existing steel. A steel joining structure can be provided.

It is a perspective view which shows one Embodiment of the steel material joining structure of this invention. It is a front view which shows one Embodiment of the steel material joining structure of this invention. It is a side view which shows one Embodiment of the steel material joining structure of this invention. In the steel material joining structure of FIGS. 1-3, it is a schematic diagram which shows typically the force which opposes when tensile force, shearing force, and compressive force are applied. It is a front view which shows other embodiment of the steel material joining structure of this invention. FIG. 6 is a front view showing a state in which the newly installed steel material is separated from the structure and the first fixed plate is disassembled in the steel material joint structure of FIG. 5. FIG. 6 is a schematic diagram schematically showing forces to be countered when a tensile force, a shear force, and a compressive force are applied in the steel material joint structure of FIG. 5. It is a front view which shows the conventional steel material joining structure.

  Hereinafter, with reference to the accompanying drawings, embodiments of the steel joint structure of the present invention will be described.

  As shown in FIG. 1, the steel material joining structure 1 of the present invention is a steel material (newly installed) in an existing building structure including a steel material (existing steel material 3) that has already been arranged. Used to join steel 4). Examples of the building structure to which the steel joint structure of the present invention is applied include a steel frame structure, but any building structure using a steel material can be applied. In addition, the steel joint structure of the present invention joins a steel or brace connected to a vibration damping device such as a vibration damper to a structure as a newly installed steel when, for example, an existing building structure is subjected to seismic reinforcement work. Can be used to However, the steel material joining structure of the present invention is not limited to its use, and can be used for other purposes of joining a newly installed steel material to a structure including an existing steel material. Hereinafter, an example in which a steel material (new steel material) connected to a vibration damping device is joined to a structure including H-shaped steel (existing steel material) arranged as a beam in an existing building structure will be described.

  A steel material joining structure 1 according to an embodiment of the present invention (hereinafter referred to as a first embodiment) extends in a first direction X and is substantially perpendicular to the first direction X, as shown in FIGS. An existing steel material 3 having a first surface 31a and a second surface 32a that are spaced apart and substantially parallel to each other in two directions Y, and a new steel material 4 joined to the structure 2 including the existing steel material 3 are provided. . Furthermore, the steel material joining structure 1 is provided in the newly installed steel material 4 and is arranged on the first surface 31a side and the first fixed plate 5 and on the second surface 32a side. A second fixing plate 6 sandwiched in the second direction Y, and a tension member 9 for connecting the first fixing plate 5 and the second fixing plate 6 in the second direction Y are provided. In the steel joining structure 1, the first fixed plate 5 and the second fixed plate 6 are connected by the tension material 9 in the second direction Y, and the structure 2 is sandwiched in the second direction Y, whereby the first fixed plate The newly installed steel material 4 provided with 5 is joined to the structure 2 including the existing steel material 3.

  In the first embodiment, the structure 2 includes an existing steel material 3 and a floor material F provided on the first surface 31a side of the existing steel material 3. However, the structure 2 only needs to include the existing steel material 3. For example, the structure 2 may include other members such as a ceiling material and a wall material separately from the floor material F, or the existing steel material without including the floor material F. Only 3 may be included. Further, the position where other members including the floor material F are provided is not limited to the first surface 31a side of the existing steel material 3, and is another position such as the second surface 32a side of the existing steel material 3. It doesn't matter.

  In the first embodiment shown in FIG. 1 to FIG. 3, the existing steel material 3 is an H-section steel arranged extending in the horizontal direction (first direction X). As shown in FIGS. 1 to 3, the existing steel material 3 includes a first flange 31 and a second flange 32 that are spaced apart from each other in the vertical direction (second direction Y) and substantially parallel, and a first flange 31. And a web 33 that connects between the second flange 32 and the cross-section substantially perpendicular to the horizontal direction is substantially H-shaped. The first surface 31a and the second surface 32a described above respectively correspond to the outer surface of the first flange 31 and the outer surface of the second flange 32 in the first embodiment. The existing steel material 3 extends in the horizontal direction in the first embodiment, but may extend in one direction, and may extend in another direction such as a vertical direction. Moreover, although the existing steel material 3 is H-section steel in 1st Embodiment, if it has two surfaces spaced apart and substantially parallel to each other in the direction substantially perpendicular to the direction in which the existing steel material 3 extends, For example, a steel material having another shape such as a square columnar steel material may be used. Moreover, it does not specifically limit as a material of the existing steel material 3, It can be set as the material similar to the material of the steel material generally used for a building structure.

  The new steel material 4 is a member joined to the structure 2 including the existing steel material 3. As shown in FIGS. 1 to 3, the new steel material 4 is arranged extending in the vertical direction (second direction Y), and is welded or bolted to one end side (lower end side) in the second direction Y. The first fixing plate 5 is fixed by a known method such as the above, and a vibration damping device (not shown) is connected to the other end side (upper end side) in the second direction Y. The new steel material 4 is indirectly joined to the first surface 31 a of the existing steel material 3 together with the first fixing plate 5 via the floor material F provided on the first surface 31 a side of the existing steel material 3. However, the new steel material 4 may be joined to the structure 2 including the existing steel material 3 and is joined directly to the first surface 31a of the existing steel material 3 together with the first fixing plate 5 without the floor material F. Alternatively, it may be joined directly or indirectly to the second surface 32a instead of the first surface 31a of the existing steel material 3, or to both the first surface 31a and the second surface 32a of the existing steel material 3. It may be joined directly or indirectly. For example, when joining the new steel material 4 to both the first surface 31a side and the second surface 32a side of the existing steel material 3, in the first embodiment, by providing the second fixing plate 6 to another new steel material That structure is realized. Therefore, according to the steel material joining structure of the present invention, the new steel material 4 is joined directly or indirectly to the first surface 31 a and / or the second surface 32 a of the existing steel material 3 together with the first fixing plate 5.

  Moreover, in the first embodiment shown in FIGS. 1 to 3, the newly installed steel material 4 includes two flanges 41, 42 that are spaced apart from each other in the horizontal direction and arranged substantially in parallel, and two flanges 41, 42. And a horizontal sectional shape is substantially H-shaped. However, if the new steel material 4 is provided with the first fixing plate 5 and can be joined to the structure 2 together with the first fixing plate 5, its shape, the direction in which it is disposed, the member connected to the other end, etc. Is not limited to the first embodiment. For example, a brace inclined from the vertical direction may be used as the new steel material. Moreover, it does not specifically limit as a material of the newly installed steel material 4, It can be set as the material similar to the material of the steel material generally used for a building structure.

  As described above, the first fixed plate 5 and the second fixed plate 6 are connected to each other in the second direction Y by the tension material 9, and sandwich the structure 2 in the second direction Y, thereby attaching the new steel material 4 to the structure. 2 is joined. As shown in FIGS. 1 and 3, the first fixed plate 5 has both ends of the first fixed plate 5 in the third direction Z substantially perpendicular to the first direction X and the second direction Y in the third direction Z. The first surface 31a is formed and disposed so as to protrude from both ends. Similarly, the second fixed plate 6 is formed and disposed so that both ends of the second fixed plate 6 in the third direction Z protrude from both ends of the second surface 32a in the third direction Z. The first fixing plate 5 and the second fixing plate 6 are connected by the tension material 9 in the protruding regions 5 a and 6 a of the first fixing plate 5 and the second fixing plate 6. By connecting the first fixed plate 5 and the second fixed plate 6 in the regions 5a and 6a protruding in this way, the existing steel material 3 is not provided with a through hole for the tension material 9, and is not welded. The new steel material 4 can be joined to the structure 2, and the new steel material 4 can be indirectly joined to the existing steel material 3.

  More specifically, the first fixed plate 5 and the second fixed plate 6 are substantially rectangular plates having substantially the same surface area and extending in substantially the same first direction X, as shown in FIGS. The plate-like surfaces are arranged so as to face each other with the structure 2 in the second direction Y. The first fixed plate 5 and the second fixed plate 6 are formed such that the length in the third direction Z is longer than the length in the third direction Z of each of the first surface 31a and the second surface 32a. . And as above-mentioned, as for the 1st fixing plate 5 and the 2nd fixing plate 6, the both ends of the 3rd direction Z each protrude from the both ends of the 3rd direction Z of each of the 1st surface 31a and the 2nd surface 32a. It is arranged like this. The regions protruding from the first fixed plate 5 and the second fixed plate 6 (first protruding portion 5a and second protruding portion 6a) are formed in a substantially rectangular shape extending in the first direction X. The tension material 9 can be inserted into each of the first protrusion 5a and the second protrusion 6a, and four through holes arranged in the first direction X (first through hole 5h and second through hole 6h). (See FIGS. 2 and 3). The tension material 9 is inserted into the first through hole 5h and the second through hole 6h provided in the first projecting portion 5a and the second projecting portion 6a, and a tension force is applied to the tendon material 9, whereby the first The fixed plate 5 and the second fixed plate 6 are connected to each other through the structure 2. Then, by connecting the first fixed plate 5 and the second fixed plate 6 to each other, the new steel material 4 is joined to the structure 2 and indirectly joined to the existing steel material 3.

  If the first fixed plate 5 and the second fixed plate 6 are formed so that both ends in the third direction Z protrude from both ends in the third direction Z of the first surface 31a and the second surface 32a, respectively. For example, it may be formed in another shape such as a substantially elliptical shape, or may be formed in different sizes. In addition, as the first fixed plate 5 and the second fixed plate 6, a steel material having the same material as that of the existing steel material 3 and the new steel material 4 can be used, but even if a force is applied to the steel material joining structure 1, It is sufficient that brittle fracture does not occur prior to the new steel material 4, and it is also possible to use a material made of another material.

  The tension material 9 connects the first fixed plate 5 and the second fixed plate 6 to each other by applying a tension force. 1-3, the tension material 9 extends along the second direction Y, and the first through hole 5h and the second through hole provided in the first projecting portion 5a and the second projecting portion 6a. 6h is inserted, and both ends of the second direction Y are arranged so as to protrude from the surface of the first protrusion 5a and the second protrusion 6a opposite to the surface facing the structure 2. The tension member 9 has a washer W inserted through both ends protruding from the first protrusion 5a and the second protrusion 6a, and a nut N is screwed together, so that a tension force is applied along the second direction Y. By applying a tension force to the tension member 9, the first fixing plate 5 and the second fixing plate 6 receive a force in a direction close to each other in the second direction Y so as to sandwich the structure 2. Connected. As will be described later, the tensile force in the second direction Y applied to the tension material 9 can counter the tensile force in the second direction Y received by the joint portion between the newly installed steel material 4 and the structure 2. The joint structure 1 can obtain a high joint strength.

  The arrangement and number of the tension members 9 are appropriately set so that the newly installed steel material 4 can be joined to the structure 2 with sufficient strength, and are not limited to the arrangement and number of the first embodiment described above. However, it is desirable that the tension member 9 connects the first fixing plate 5 and the second fixing plate 6 to each other with a uniform force in a plane including the first direction X and the third direction Z, and therefore the first protrusion It is desirable that the portions 5a and the second projecting portions 6a are arranged in an average dispersed manner over the entire area. Further, the tension member 9 is arranged so as to be able to resist the shearing force received by the joint portion between the new steel material 4 and the structure 2 when the new steel material 4 receives a force in the third direction Z with respect to the structure 2. It is desirable. Specifically, when the newly installed steel material 4 receives a force in the third direction Z, the tension material 9 is directly applied to both ends of the existing steel material 3 in the third direction Z or indirectly through a seal material or the like. It is desirable to arrange so that it abuts. With this arrangement, even if the new steel material 4 receives a force in the third direction Z and receives a shearing force at the joint portion between the new steel material 4 and the structure 2, the tension material 9 is applied to both ends of the existing steel material 3. The contact can counteract the shearing force.

  The tension material 9 can connect the first fixed plate 5 and the second fixed plate 6 with sufficient strength, and is brittle when subjected to a tensile force that causes the newly installed steel material 4 and the structure 2 to be pulled apart in the opposite directions. Although it will not specifically limit if it has the intensity | strength which does not produce destruction, For example, a well-known PC steel rod and a high strength bolt can be used.

  Furthermore, in the steel material joining structure 1, as shown in FIGS. 1 to 3, a first adhesive layer 7 is disposed between the first fixing plate 5 and the structure 2. The first adhesive layer 7 bonds the first fixing plate 5 and the structure 2, and counteracts the tensile force and shear force received by the joint portion between the first fixing plate 5 and the structure 2, as will be described in detail later. To do. Since the 1st adhesive bond layer 7 can oppose the tensile force and shear force, the steel material joining structure 1 can obtain high joint strength. In the steel joint structure 1, the second adhesive layer 8 may be disposed between the second fixed plate 6 and the structure 2. The second adhesive layer 8 bonds the second fixing plate 6 and the structure 2, and opposes the tensile force and shearing force received by the joint portion between the second fixing plate 6 and the structure 2. Therefore, the steel material joint structure 1 can obtain higher joint strength by arranging the second adhesive layer 8.

  The first adhesive layer 7 and the second adhesive layer 8 are not particularly limited as long as the first fixing plate 5 and the second fixing plate 6 can be bonded to the structure 2 with sufficient strength. Adhesives, acrylic resin adhesives, silicone resin adhesives, polyurethane adhesives, cyanoacrylate adhesives, SGA adhesives, decomposable adhesives, etc. can be used, among which epoxy resin adhesives Preferably used.

  As shown in FIGS. 1 to 3, the steel material joining structure 1 is also interposed between the first surface 31 a and the second surface 32 a so that the existing steel material 3 can resist the compressive force received in the second direction Y. The member 10 may be inserted. More specifically, the insertion member 10 is inserted between the inner surface 31b of the first flange 31 and the inner surface 32b of the second flange 32 of the existing steel material 3, and the inner surface 31b and the second flange of the first flange 31. It arrange | positions so that the inner surface 32b of 32 may contact | abut. The insertion member 10 is a substantially prismatic steel pipe extending in the second direction Y between the inner surface 31b of the first flange 31 and the inner surface 32b of the second flange 32, and is formed by injecting mortar therein. The insertion member 10 has a shaft rigidity that can counter the compressive force that the existing steel material 3 receives in the second direction Y, and is disposed in contact with the inner surface 31 b of the first flange 31 and the inner surface 32 b of the second flange 32. Thereby, even if the existing steel material 3 receives a compressive force in the second direction Y, the first flange 31, the second flange 32 and the web 33 can be prevented from buckling. Here, the abutment of the insertion member 10 on the inner surface 31b of the first flange 31 and the inner surface 32b of the second flange 32 is a direct abutment not involving other members as in the first embodiment. Alternatively, it may be indirect contact via another member such as a sealing agent or an adhesive. Moreover, the insertion member 10 should just be able to oppose the compressive force which the existing steel materials 3 receive in the 2nd direction Y, for example, the hollow steel materials (square-shaped steel pipe etc.) in which the mortar is not inject | poured, or a solid square pillar shape It may be a steel material of another form such as a steel material or a member of another material.

  Next, operations and effects of the steel material joining structure 1 produced when a tensile force, a shearing force, and a compressive force are applied to the steel material joining structure 1 of the first embodiment will be described with reference to FIG. FIG. 4 schematically shows the forces that each part of the steel material joining structure 1 counters when a tensile force, a shearing force, and a compressive force are applied to the steel material joining structure 1 of the first embodiment.

  When the new steel material 4 receives a force that is pulled upward in FIG. 4 with respect to the structure 2, the first fixing plate 5 provided on the new steel material 4 also receives the same force at the same time, and the new steel material 4 and the structure 2 These joints receive a tensile force in the vertical direction in FIG. At this time, in the steel material joining structure 1, since the first fixing plate 5 is adhered to the structure 2 by the first adhesive layer 7, the adhesive force of the first adhesive layer 7 opposes this tensile force. (Reference F1). In addition, the first fixing plate 5 is fixed to the structure 2 so as to sandwich the structure 2 together with the second fixing plate 6 by a tension material 9 to which tension is applied in the vertical direction in FIG. The tension in the vertical direction in FIG. 4 of the tension member 9 opposes this tensile force (reference numeral F2).

  On the other hand, when the new steel material 4 receives a force that is moved in the left-right direction in FIG. 4 with respect to the structure 2, the first fixing plate 5 provided on the new steel material 4 also receives the same force at the same time, The joint portion with the structure 2 receives a shearing force in the left-right direction in FIG. At this time, since the first fixing plate 5 is adhered to the structure 2 by the first adhesive layer 7, the adhesive force of the first adhesive layer 7 opposes this shear force (reference F3). Here, the first adhesive layer 7 is firmly sandwiched between the first fixing plate 5 and the structure 2 by the tension in the vertical direction in FIG. Compared to the case without tension, it has a greater resistance against shearing force.

  Therefore, according to the steel material joining structure 1 of the first embodiment, the tensile force received by the joint portion between the newly installed steel material 4 and the structure 2 includes the adhesive force of the first adhesive layer 7 and the tension of the tension material 9. The strength of the first steel layer 7 can be opposed to the shearing force received by the joint portion between the new steel material 4 and the structure 2 against the force, so that the new steel material 4 can be formed with sufficient strength. It can join to the structure 2 and the newly installed steel material 4 can be indirectly joined to the existing steel material 3.

  Further, when the newly installed steel material 4 receives a force pressing downward in FIG. 4 against the structure 2, the first fixing plate 5 provided on the newly installed steel material 4 receives the same force at the same time and is included in the structure 2. The existing steel material 3 receives a compressive force in the vertical direction in FIG. At this time, in the steel material joining structure 1, the insertion member 10 is provided between the first surface 31a and the second surface 32a of the existing steel material 3 (between the inner surface 31b of the first flange 31 and the inner surface 32b of the second flange 32). Is inserted, the shaft rigidity of the insertion member 10 opposes this compression force (reference F4). Therefore, in the steel material joining structure 1, by providing the insertion member 10, even if a compression force is applied between the first flange 31 and the second flange 32 of the existing steel material 3, the insertion member 10 counters this compression force. And it can suppress that the 1st flange 31, the 2nd flange 32, and the web 33 buckle.

  Next, another embodiment (hereinafter, referred to as a second embodiment) of the steel material joining structure of the present invention will be described with reference to FIG. In FIG. 6, in order to make the structure of the 1st fixed plate 5 in 2nd Embodiment easy to understand, the figure which showed the state which isolate | separated the new steel material 4 from the structure 2, and decomposed | disassembled the 1st fixed plate 5 is shown. ing. 5 and 6, the same reference numerals are given to the configurations common to the first embodiment shown in FIGS. 1 to 3. Moreover, in the following description, the description of the structure common to 1st Embodiment shown by FIGS. 1-3 is abbreviate | omitted.

  As shown in FIGS. 5 and 6, the first fixed plate 5 of the second embodiment includes an integrated plate member 51 fixed to the newly installed steel material 4, and a separation plate separated from the newly installed steel material 4 and the integrated plate member 51. And a member 52. More specifically, the first fixed plate 5 includes two integrated plate members 51 and 51 that are spaced apart from each other in the first direction X and fixed to the new steel material 4, and the new steel material 4 and the two integrated plate members 51 and 51. And a single separation plate member 52 disposed between the two integral plate members 51, 51. The separation plate member 52 is disposed such that both end portions 52a and 52a in the first direction X are in contact with the end portions 51a and 51a of the adjacent integrated plate members 51 and 51. The integrated plate members 51 and 51 and the separation plate member 52 are connected to the second fixed plate 6 in the same manner as the connection method of the first fixed plate 5 and the second fixed plate 6 described above. The second fixing plate 6 does not include a plate member separated as in the first fixing plate 5 in the second embodiment, but the first fixing plate 6 is used in order to further exhibit the actions and effects described below. It is desirable to provide separated plate members corresponding to the positions of the integral plate member 51 and the separation plate member 52 of the plate 5.

  The action and effect of the steel material joining structure 1 produced when a tensile force, a shearing force and a compressive force are applied to the steel material joining structure 1 of the second embodiment will be described with reference to FIG. FIG. 7 schematically shows the forces that each part of the steel material joining structure 1 counters when a tensile force, a shearing force, and a compressive force are applied to the steel material joining structure 1 of the second embodiment. In addition, in the following description, the description of the matter which is common with the effect | action and effect which the steel material joining structure 1 of 1st Embodiment shown by FIG. 4 shows is abbreviate | omitted.

  When the new steel material 4 receives a force that pulls upward in FIG. 7 with respect to the structure 2, the integrated plate members 51 and 51 fixed to the new steel material 4 simultaneously receive the same force, but the new steel material 4 and the integrated plate member The separation plate member 52 separated from 51, 51 receives no or almost no force. Therefore, the joint portion between the integrated plate members 51, 51 and the structure 2 receives a tensile force in the vertical direction in FIG. 7, but the joint portion between the separation plate member 52 and the structure 2 in the vertical direction in FIG. Receives little or no tensile force. Therefore, in the steel material joining structure 1 of the second embodiment, the integrated plate members 51 and 51 and the separation plate member 52 are both bonded to the structure 2 by the first adhesive layer 7, but the first adhesive layer 7, the portions 71, 71 of the first adhesive layer 7 bonded to the integrated plate members 51, 51 mainly resist the tensile force (reference numeral F <b> 1). In addition, in the steel material joining structure 1 of the second embodiment, the integrated plate members 51 and 51 and the separation plate member 52 are both the second fixed plate 6 by the tension material 9 to which tension is applied in the vertical direction in FIG. At the same time, the tension member 9 is fixed to the structure body 2 so as to sandwich the structure body 2. The force is countered (reference F2). Note that “the portions 71 and 71 of the first adhesive layer 7 bonded to the integrated plate members 51 and 51 in the first adhesive layer 7 mainly oppose the tensile force” here means the first adhesive. It means that only the portions 71 and 71 of the first adhesive layer 7 bonded to the integral plate members 51 and 51 in the layer 7 resist the tensile force, but the term “only” is limited to a strict meaning. The first adhesive layer 7 portions 71, 71 bonded to the integrated plate members 51, 51 have priority over the first adhesive layer 7 portion 72 bonded to the separation plate member 52. It also means countering tensile forces.

  On the other hand, when the new steel material 4 receives a force that moves the structure 2 in the left-right direction in FIG. 7, the integrated plate members 51 and 51 fixed to the new steel material 4 simultaneously receive the same force, and at the same time, the integrated plate The separation plate member 52 in contact with the left and right end portions 51a and 51a of the members 51 and 51 in FIG. 7 also receives the same force from the integrated plate members 51 and 51. Therefore, not only the joint portion between the integrated plate members 51 and 51 and the structure 2 but also the joint portion between the separation plate member 52 and the structure 2 receives a shearing force in the left-right direction in FIG. At this time, in the steel material joining structure 1 of the second embodiment, the integrated plate members 51 and 51 and the separation plate member 52 are both bonded to the structure 2 by the first adhesive layer 7, but the first adhesive layer 7, the portions 71, 71 of the first adhesive layer 7 bonded to the integrated plate members 51, 51 and the portion 72 of the first adhesive layer 7 bonded to the separation plate member 52 counteract the shearing force. (Reference F3).

  As described above, in the steel joint structure 1 of the second embodiment, the first adhesive layer 7 receives a tensile force when the newly installed steel 4 receives a force in the second direction Y with respect to the structure 2. Sometimes, the portions 71, 71 of the first adhesive layer 7 bonded to the integrated plate members 51, 51 in the first adhesive layer 7 mainly resist the tensile force. On the other hand, when the first adhesive layer 7 receives a shearing force due to the new steel material 4 receiving a force in the first direction X with respect to the structure 2, the integrated plate member 51 of the first adhesive layer 7. , 51 and the portion 71 of the first adhesive layer 7 bonded to the separation plate member 52 and the portion 72 of the first adhesive layer 7 bonded to the separation plate member 52 counteract the shearing force. That is, the portion 72 of the first adhesive layer 7 bonded to the separation plate member 52 is only a part of the shearing force (or the total shearing force received by the joint portion between the first fixing plate 5 and the structure 2 (or , Mainly a part of shearing force), and counteracts the shearing force. Therefore, in the steel material joining structure 1 of the second embodiment, the first adhesive agent bonded to the separation plate member 52 by arranging the integrated plate members 51 and 51 and the separation plate member 52 so as to realize the above-described state. The portion 72 of the layer 7 is restrained from receiving a composite force including a tensile force (tensile force + shear force), so that it is not necessary (or hardly) to counter the tensile force, and exclusively counters the shear force. The shear resistance performance of the portion 72 of the first adhesive layer 7 can be maximized. Even if the integrated plate members 51 and 51 are separated from the structure 2 by the tensile force, the separation plate member 52 can stably resist the shearing force. Furthermore, when calculating the yield strength of the steel material joint structure 1, it is considered that the portion 72 of the first adhesive layer 7 bonded to the separation plate member 52 receives only shear force (or mainly shear force). Therefore, the proof stress calculation becomes easy, and as a result, the structural design of the steel joint structure becomes easy.

  In the second embodiment shown in FIG. 5, the first fixed plate 5 includes two integral plate members 51 and 51 and one separation plate member 52. However, the first fixing plate 5 is not limited to the second embodiment as long as the same action and effect can be obtained by the same principle as the steel material joint structure 1 of the second embodiment described above. For example, the first fixed plate 5 may include two separation plate members 52 and one integral plate member 51 disposed between the two separation plate members 52. The first fixed plate 5 may include three or more integrated plate members 51 and two or more separation plate members 52, and two or more separation plate members 52 may be provided between the integrated plate members 51. It may be arranged. Further, as in the second embodiment, both end portions 52a and 52a of the separation plate member 52 may be in direct contact with the end portions 51a and 51a of the integrated plate members 51 and 51, or the second embodiment. Unlike the embodiment, both end portions 52a and 52a of the separation plate member 52 may be in indirect contact with the end portions 51a and 51a of the integrated plate members 51 and 51 via another member. However, as in the second embodiment, the first fixed plate 5 includes two integral plate members 51, 51 and one separation plate member 52 disposed between the integral plate members 51, 51. By doing, the structure of the steel material joining structure 1 becomes simple, and construction becomes easy.

  As described above, according to the steel material joining structure of the present invention, the existing steel material and the new steel material are not welded, and the existing steel material is counteracted to the tensile force and the shearing force without providing a through hole. The existing steel material and the new steel material can be joined with sufficient strength.

DESCRIPTION OF SYMBOLS 1 Steel material joining structure 2 Structure 3 Existing steel material 31 1st flange 31a 1st surface 31b 1st flange inner surface 32 2nd flange 32a 2nd surface 32b 2nd flange inner surface 33 Web 4 Newly installed steel materials 41, 42 Flange 43 Connecting member 5 first fixed plate 51 integrated plate member 51a end of integrated plate member 52 separation plate member 52a end of separation plate member 5a first protrusion 5h first through hole 6 second fixed plate 6a second protrusion 6h second Through hole 7 First adhesive layer 71, 72 Part of first adhesive layer 8 Second adhesive layer 9 Tension material 10 Insertion member F Flooring material F1, F2, F3, F4 Force N Nut W Washer X First direction Y 2nd direction Z 3rd direction

Claims (4)

In an existing building structure, a steel joint structure (1) for joining a new steel member (4) to a structure (2) including an existing steel member (3),
A first surface (31a) and a second surface (32a) extending in the first direction (X) and spaced apart from each other in a second direction (Y) substantially perpendicular to the first direction (X). An existing steel material (3) having
A new steel material (4) to be joined to the structure (2) including the existing steel material (3);
A first fixing plate (5) provided on the new steel member (4) and disposed on the first surface (31a) side;
A second fixing plate (6) disposed on the second surface (32a) side and holding the structure (2) in the second direction (Y) together with the first fixing plate (5);
A tension member (9) for connecting the first fixing plate (5) and the second fixing plate (6) in the second direction (Y);
An adhesive layer (7) is disposed between the first fixing plate (5) and the structure (2);
Both ends of the first fixed plate (5) in the third direction (Z) substantially perpendicular to the first direction (X) and the second direction (Y) are the first surface in the third direction (Z). Projecting from both ends of (31a),
Both ends of the second fixed plate (6) in the third direction (Z) protrude from both ends of the second surface (32a) in the third direction (Z),
In the protruding regions (5a, 6a) of the first fixing plate (5) and the second fixing plate (6), the first fixing plate (5) and the second fixing plate are formed by the tendon material (9). A steel joint structure (1), wherein (6) is connected. The existing steel material (3) is an H-section steel,
Between the first surface (31a) and the second surface (32a), an insertion member (10) capable of resisting the compressive force that the existing steel material (3) receives in the second direction (Y) is interposed. The steel joint structure (1) according to claim 1, wherein the steel joint structure (1) is inserted. The first fixed plate (5) is an integrated plate member (51) fixed to the newly installed steel material (4), and a separated plate member (51) separated from the newly installed steel material (4) and the integrated plate member (51). 52)
The integrated plate member (51) and the separation plate member (52) are configured such that the new steel material (4) receives the force in the second direction (Y) with respect to the structure (2). When (7) receives a tensile force, the portion (71) of the adhesive layer (7) bonded to the integral plate member (51) in the adhesive layer (7) mainly counters the tensile force. When the new steel material (4) receives a force in the first direction (X) with respect to the structure (2), the adhesive layer (7) receives a shearing force. Of (7), the portion (71) of the adhesive layer (7) bonded to the integral plate member (51) and the portion of the adhesive layer (7) bonded to the separation plate member (52) (72) are arranged so as to oppose the shearing force. Steel joint structure (1). The first fixed plate (5) is spaced apart in the first direction (X) and fixed to the new steel member (4), and at least two integral plate members (51, 51), and the new steel member (4) And at least one separation plate member (52) separated from the at least two integral plate members (51, 51) and disposed between the at least two integral plate members (51, 51). The steel joint structure (1) according to any one of claims 1 to 3.

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