WO1992014007A1 - Structure de renforcement pour elements de construction - Google Patents

Structure de renforcement pour elements de construction Download PDF

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Publication number
WO1992014007A1
WO1992014007A1 PCT/JP1992/000107 JP9200107W WO9214007A1 WO 1992014007 A1 WO1992014007 A1 WO 1992014007A1 JP 9200107 W JP9200107 W JP 9200107W WO 9214007 A1 WO9214007 A1 WO 9214007A1
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WO
WIPO (PCT)
Prior art keywords
reinforcing
structural member
member according
neutral axis
reinforcing structure
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
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PCT/JP1992/000107
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English (en)
Japanese (ja)
Inventor
Toshiro Suzuki
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Individual
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Individual
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Publication of WO1992014007A1 publication Critical patent/WO1992014007A1/fr
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Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C3/00—Structural elongated elements designed for load-supporting
    • E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
    • E04C3/04—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal
    • E04C3/08—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal with apertured web, e.g. with a web consisting of bar-like components; Honeycomb girders
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C3/00—Structural elongated elements designed for load-supporting
    • E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
    • E04C3/04—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal
    • E04C3/06—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal with substantially solid, i.e. unapertured, web
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C3/00—Structural elongated elements designed for load-supporting
    • E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
    • E04C3/04—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal
    • E04C2003/0404—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects
    • E04C2003/0408—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects characterised by assembly or the cross-section
    • E04C2003/0413—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects characterised by assembly or the cross-section being built up from several parts
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C3/00—Structural elongated elements designed for load-supporting
    • E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
    • E04C3/04—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal
    • E04C2003/0404—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects
    • E04C2003/0408—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects characterised by assembly or the cross-section
    • E04C2003/0413—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects characterised by assembly or the cross-section being built up from several parts
    • E04C2003/0417—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects characterised by assembly or the cross-section being built up from several parts demountable
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C3/00—Structural elongated elements designed for load-supporting
    • E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
    • E04C3/04—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal
    • E04C2003/0404—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects
    • E04C2003/0408—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects characterised by assembly or the cross-section
    • E04C2003/0421—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects characterised by assembly or the cross-section comprising one single unitary part
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C3/00—Structural elongated elements designed for load-supporting
    • E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
    • E04C3/04—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal
    • E04C2003/0404—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects
    • E04C2003/0426—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects characterised by material distribution in cross section
    • E04C2003/043—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects characterised by material distribution in cross section the hollow cross-section comprising at least one enclosed cavity
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C3/00—Structural elongated elements designed for load-supporting
    • E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
    • E04C3/04—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal
    • E04C2003/0404—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects
    • E04C2003/0426—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects characterised by material distribution in cross section
    • E04C2003/0434—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects characterised by material distribution in cross section the open cross-section free of enclosed cavities
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C3/00—Structural elongated elements designed for load-supporting
    • E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
    • E04C3/04—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal
    • E04C2003/0404—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects
    • E04C2003/0426—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects characterised by material distribution in cross section
    • E04C2003/0439—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects characterised by material distribution in cross section the cross-section comprising open parts and hollow parts
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C3/00—Structural elongated elements designed for load-supporting
    • E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
    • E04C3/04—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal
    • E04C2003/0404—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects
    • E04C2003/0443—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects characterised by substantial shape of the cross-section
    • E04C2003/0447—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects characterised by substantial shape of the cross-section circular- or oval-shaped
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C3/00—Structural elongated elements designed for load-supporting
    • E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
    • E04C3/04—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal
    • E04C2003/0404—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects
    • E04C2003/0443—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal beams, girders, or joists characterised by cross-sectional aspects characterised by substantial shape of the cross-section
    • E04C2003/0452—H- or I-shaped
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C3/00—Structural elongated elements designed for load-supporting
    • E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
    • E04C3/04—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of metal
    • E04C2003/0486—Truss like structures composed of separate truss elements
    • E04C2003/0491—Truss like structures composed of separate truss elements the truss elements being located in one single surface or in several parallel surfaces

Definitions

  • an H-shaped cross-section member as a structural member in the case of a beam, an I-shaped cross-section in which H is horizontally oriented is usually used, but for convenience of description, it is referred to as an H-shaped cross-section member.
  • each truss member in the truss structure is usually designed so that a compressive or tensile force is applied.However, the buckling of one of the compression-side chords sharply reduces the overall truss' proof stress. There is a problem of doing. In order to prevent buckling of the compression-side chord, it may be possible to increase the cross section of the member or perform various reinforcements, but imbalance in rigidity and weight may occur. The design becomes complicated. An object of the present invention is to solve the above-mentioned problems in the prior art. Disclosure of the invention
  • the reinforcing structural member of the present invention is a component located on the compression side of a structural member such as a plate girder or a flat truss or a three-dimensional truss assembled into an H-shaped beam, a grooved beam, an H-shaped column, an I-shaped cross section, or the like.
  • a reinforcing portion is provided which extends in the direction of the neutral axis with reference to the neutral axis or the vicinity of the cross section of the structural member.
  • the reinforcing portion is disposed around the neutral axis of the member cross section or the vicinity thereof so as to restrict the deformation in the vicinity thereof.
  • the reinforcing member may be provided over the entire length of the structural member, or may be provided partially only in the vicinity of a range in which components located on the press contact side may cause buckling.
  • the buckling of the chord on the compression side of the truss is reduced by providing a reinforcing member parallel to the neutral axis or in the vicinity of the neutral axis to reduce the load capacity of the truss as a whole. Can be prevented.
  • the reinforcing member is provided at or near the neutral shaft, it hardly participates in the initial state of stress deformation, and does not complicate the design of the truss.
  • the structural member is an H-shaped cross-section member, the reinforcing part is provided parallel to the flange and the neutral axis at a position where the flange on the pressure side may cause buckling. The same can be dealt with.
  • the reinforcing part depending on the port shape and configuration of the structural members.
  • the structural member to be reinforced is an H-shaped section member used as a column or a beam, a grooved section member (hereinafter referred to as an H-shaped section), a shape member such as a band-shaped section, an angle, etc.
  • Other reinforcing members can be formed by welding or bolting to both sides or one side of the wheel as a reinforcing member.
  • a half-split pipe or the like can be used as a reinforcing member.
  • a half-split pipe near the neutral shaft is used.
  • the torsional stiffness is achieved by forming a tube reinforcement.
  • the reinforcing portion may be formed integrally with the structural member without using a separate reinforcing member.
  • the cross section of the structural member is formed into an enlarged shape at the center of the X-shaped tube, or the T-shaped member is used as a reinforcing member. It is also conceivable to weld the tip of the gauze tube to form a structural member with a substantially H-shaped cross section, or to integrally mold a similar shape.
  • a half-split pipe that forms a closed cross section is used as a reinforcing member, that part is also used as a pipe or a duct for wiring, and a duct connection port is provided at a predetermined position. It is also possible.
  • a reinforcing member can be formed by combining or combining a member consisting of a connecting portion that connects the rain flanges of the above, or by attaching or joining an integral member as a reinforcing member by welding, porting, or the like.
  • the neutral axis of the entire beam shifts to the tension side due to the reduction of the resistance of the compression side of the structural member due to the buckling of the flange on the compression side.
  • the joints transmit the compressive stress of the compression-side flange to the axial resistance part.
  • the reinforcing part having the same function can also be obtained by joining an X-shaped steel member intersecting at the center between the two flanges of the web as a reinforcing member by welding or bolting.
  • the X-shaped net is provided on the basis of the neutral axis of the cross section of the structural member or in the vicinity thereof, and reduces the stress on the compression side for the amount of reduction in power resistance when large deformation occurs on the compression side flange due to buckling. It is transmitted in the shape of an X-shape, and the reinforcement in the vicinity of the neutral shaft and the web in the vicinity can compensate for the reduced resistance.
  • the reinforcing member may be, for example, an angle or a channel such as a channel steel, a pipe, etc., and is the same as the upper chord, lower chord, abdomen, etc. constituting the truss structure Can be used.
  • a cross-sectional shape and material different from those of the truss components.
  • the reinforcing member is provided at or near the neutral shaft.
  • This has the advantage that the reinforcing member hardly affects the initial stress-deformation state and does not complicate the design of the truss.However, it is also possible to consider the se arrangement that is biased toward the chord on the compression side. In that case, the reinforcing effect on the chord on the compression side increases. It is also conceivable to provide reinforcing members on the upper and lower sides of the neutral axis, respectively, so that the arrangement is symmetrical to the neutral axis. When the reinforcing members are attached from one side or both sides of the flat truss structure, a long member extending between multiple abdominal members can be used. However, it is also possible to mount a plurality of reinforcing members in parallel with the neutral axis.
  • the abdominal material of the space truss body is connected near the neutral axis of the truss formed in the upper and lower layers, and multiple reinforcing members are connected in two directions.
  • the reinforcing structure of the present invention can be formed by arranging the reinforcing structure planarly in three directions.
  • the buckling member is placed near the fulcrum position of the three-dimensional truss as the roof structure or in the center between the fulcrum members, where the truss members such as the upper chord and the lower chord are likely to buckle. The same reinforcing effect as described above can be obtained.
  • the structure of the present invention can also be applied to a large pillar, a beam, or the like called a superstructure.
  • a superstructure is composed of a plurality of pillar members that constitute a substructure, a plurality of beam members connected by braces, etc., and is used for super-high-rise buildings, large space buildings, large span structures, etc. In order to cope with large stresses.
  • the braided columns, beams, etc. as such a superstructure as one structural member, and providing a reinforcing part extending in the direction of the neutral axis with reference to the neutral axis of the cross section or its vicinity, the above-mentioned H-shape
  • the same effect as in the case of ⁇ or a truss structure can be obtained.
  • FIG. 1 is a sectional view (A-A sectional view of FIG. 2) showing an embodiment in which the present invention is applied to an H-shaped sectional beam, and FIG. 2 is a front view thereof.
  • FIG. 3 is a front view showing another embodiment when applied to an H-shaped section beam.
  • FIG. 4 is a front view showing still another embodiment when applied to an H-shaped beam
  • FIG. Fig. 4 is a sectional view taken along line D-D of Fig. 4.
  • FIG. 6 is a front view showing still another embodiment when applied to an H-shaped beam
  • FIG. 7 is a sectional view taken along line EE of FIG.
  • Fig. 8 is a front view showing the test specimen used in Experiment 1
  • Fig. 9 is a graph showing the test results.
  • FIG. 10 is a front view showing still another embodiment of the present invention
  • FIG. 11 is a cross-sectional view taken along line FF of FIG. 10
  • FIG. 12 is a test result when an experiment 2 was applied to an H-shaped column. The graph shows
  • FIG. 13 is a perspective view showing still another embodiment applied to an H-shaped cross-section beam.
  • FIGS. 14 to 16 are analysis model diagrams relating to an increase in torsional rigidity when a half-split pipe is used as a reinforcing member, corresponding to the embodiment of FIG.
  • FIG. 17 is a front view showing the test specimen used in Experiment 3
  • FIG. 18 is a side view thereof
  • FIG. 19 is a graph showing test results.
  • FIG. 20 is a front view showing still another embodiment of the present invention
  • FIG. 21 is a sectional view taken along line GG of FIG. 20
  • FIG. 22 is a sectional view taken along line HH of FIG.
  • FIGS. 23 and 24 are side views of a structural member showing an embodiment in the case of integral molding.
  • Fig. 25 is a front view showing an embodiment in which the reinforcing portion can be used also as a duct
  • Fig. 26 is a sectional view taken along the line I-I in Fig. 25
  • Fig. 27 is a sectional view taken along the line J-J in Fig. 25 It is.
  • FIG. 28 shows an embodiment in which the present invention is applied to a truss structure.
  • FIG. 29 corresponds to a cross section taken along line K--K of FIG.
  • FIG. 30 shows another embodiment applied to a truss structure.
  • FIG. 31 is a cross-sectional view taken along line L--L of FIG.
  • FIGS. 32 to 34 are diagrams showing a calculation model when the present invention is applied to a plane truss
  • FIG. 35 is a graph showing the results of a simulation regarding load and deformation.
  • Fig. 36, Fig. 38, Fig. 40 are deformation diagrams at each loading stage in the plane truss
  • Fig. 37, Fig. 39, Fig. 41 are member stress diagrams at each loading stage.
  • FIG. 42 is a front view showing a test body used in Experiment 4 when the present invention is applied to a truss structure
  • FIG. 43 is a graph showing test results.
  • FIGS. 1 and 2 show an embodiment in which the present invention is applied to an H-shaped beam
  • FIG. 1 corresponds to an AA section in FIG.
  • a web-like mesh plate 5 is welded as a reinforcing member to the H-shaped parent 1 of the tube 4 constituting the H-shaped section beam as a structural member, and the buckling of the compression side flange of the upper and lower flanges 2 and 3 is performed. This prevents a sudden drop in load carrying capacity.
  • the strips 5 are mounted on the neutral axis of the H-shape 1 along the longitudinal direction and on both sides of the tube 4, and under normal load conditions, the strips 5 bear little load. Structural member due to buckling of flange on compression side As the compression resistance decreases on the compression side, the neutral axis of the entire beam shifts to the tension side, and the new force deterioration is gradually shared by the belt-like mesh plate 5 as a reinforcing member . In this embodiment, a part of the web screen 5 comes into contact with the column 10 and the buckling deformation of the lower flange 3 at the beam peristaltic part (or the buckling deformation of the upper flange 2 at the center in the longitudinal direction of the beam). As a result, the stress in the longitudinal direction of the strip-shaped scabbard 5 is transmitted directly to the columns 10.
  • a cross section as shown in FIG. 1 may be integrally formed in the production of the H-shape 1.
  • Fig. 3 shows another embodiment of the H-shaped beam 1 as an H-shaped cross-section beam. It connects the ice flat resistance part 15a located at the center of the rib 4 and the upper and lower flanges 2, 3 ⁇ .
  • the lower flange 3 at the end of the member of the H shape ⁇ 1 and the upper flange at the center of the member are formed using the laterally T-shaped reinforcing member 15 and the H-shaped reinforcing member 15 ′ comprising the connecting portion 15 b.
  • FIG. 3 merely shows that a T-shaped reinforcement member 15 or an H-shaped reinforcement member 15 ′ can be used depending on the load conditions and the like, and the configuration of FIG.
  • connection part 15b or directly to the column 10.
  • the shape of the cut surface in the BB cross section and the CC cross section in FIG. 3 is the same as that in FIG. 1 in the above embodiment.
  • FIGS. 4 and 5 show still another embodiment when applied to an H-shaped beam.
  • FIG. 5 corresponds to a section taken along line D-D of FIG.
  • the reinforcing member 25 is formed by the oblique stiffeners 25b provided in an X-shape at the end of the member of the H-shaped rope 1 and the horizontal stiffeners 25a provided horizontally above and below the intersection.
  • the deformation near the neutral axis of the tube 4 is restrained, and the reinforcing member 25 exerts ice flat resistance, and the plastic The hinge can be rotated.
  • the neutral axis of the whole beam shifts to the tension side due to the reduction of the resistance of the compression side of the structural member due to the buckling of the flange on the compression side.
  • FIG. 6 and 7 show still another embodiment in which the present invention is applied to an H-shaped beam
  • FIG. 7 corresponds to a section taken along line EE of FIG.
  • an H-shape composed of a horizontal resistance portion 35 a located at the center of the web 4 and a connection portion 35 b connecting the upper and lower flanges 2 and 3 is provided. Reinforcing members 35 are attached.
  • the angles used as the ice flat resistance portion 35a and the connecting portion 35b form a closed cross-section between the web 4 and the reinforcing member in the embodiment of FIG. 3 described above.
  • the torsional rigidity around the neutral axis is increased, it has a great effect of reinforcing the compression side flange against local buckling of the plate and also preventing sideways buckling. Also, the torsional rigidity of the connecting portion 35b is large at the portion, and the buckling length of the H-shaped section beam is shortened.
  • FIG. 8 shows a test piece used in an experiment for confirming the effect of the present invention (hereinafter referred to as Experiment 1)
  • FIG. 9 shows a test method and test results.
  • Experiment 1 was a shear bending experiment of a beam.
  • Regarding the neutral axis of the cross section of the H-shape ⁇ 1 as a reinforcing member on both sides of the web 4, a strip-shaped rope 5 with a width of 7 O mm and a thickness of 12 was hidden horizontally (Fig. 1 is horizontal) Welded.
  • a shear bending load P was applied to this specimen to determine the bending deformation ⁇ .
  • the figure In 9 graph no in ordinate shear bending load P P P nondimensionalized by (load at which the beam end is fully plastic moment), the horizontal axis represents bending deformation S (deformation in P p) S P It is dimensioned
  • a solid line indicated by A is a case where the reinforcement of the present invention is performed, and a broken line indicated by B is a case where the reinforcement is not performed.
  • the behavior is consistent without any involvement of the reinforcing member 5.
  • point b 2 Next maximum load immediately after the beam of unreinforced (point b 2), whereas ft force is gradually decreased, the beam was fitted with a reinforcing member 5 of the present invention, thereafter maintaining the j & forces, large Shows deformability.
  • FIGS. 10 and 11 show still another embodiment of the present invention, and FIG. 11 corresponds to a section taken along line FF of FIG.
  • Figure 12 shows the test method and results of an experiment (hereinafter, referred to as Experiment 2) when used as an H-shaped column.
  • an X-shaped net material crossing at the center of the web 44 is welded to the end of the H-shaped mineral 41 as a reinforcing member 45.
  • a slight gap is formed between the end of the X-shaped reinforcing member 45 and the flanges 42 and 43 of the H-shape 41.
  • the H-shaped section 41 of this embodiment can be used as an H-shaped section beam similarly to the above-described embodiments, but in Experiment 2, an H-section section was tested.
  • Experiment 2 is a constant-axis shear-bending test of a column.
  • the test specimens were 150 mm long, 15 G flange concealed, 9 mm thick, 12 mm thick flange, and 1 200 mm long.
  • X-shaped reinforcing members 45 with a thickness of 9 mm as shown in Fig. 10 and Fig. 11 are attached to both sides of the ribs 44 by welding.
  • a shear load Q was applied to this test piece under a constant axial force P (column cross-sectional area X 0.3 ff y ), and a column capital Eihei deformation 5 was obtained.
  • the vertical axis shearing load Q is dimensionless with Q P (load when the part material end is fully plastic moment)
  • the horizontal axis represents stigma horizontal deformation [delta] [delta] ⁇ (Q P ).
  • the solid line indicated by A is the case where the reinforcement of the present invention is performed, and the broken line indicated by B is This is the case of reinforcement.
  • the strength of the unreinforced column suddenly deteriorates due to the local buckling of the flange at the end, whereas the column with the reinforcing member 45 of the present invention sharply decreases. Severe resistance degradation occurs with considerable delay.
  • Fig. 13 shows still another embodiment.
  • a half-split steel pipe 55 as a reinforcing member is welded to the center of both sides of the tube 4 of the H-shaped rope 1 as an H-shaped cross-section beam and twisted.
  • a closed cross section is formed in a part of the cross section of the open cross section member which is weaker.
  • the torsional rigidity of the member is greatly increased, and it is also effective against lateral buckling.
  • FIGS. 14 to 16 are analysis model diagrams relating to an increase in torsional rigidity when the half-mesh pipe 55 corresponding to the embodiment of FIG. 13 is used. '
  • t f 2 (although, b flange congestion, h is ⁇ is, t w is web thickness, t f is the flange thickness).
  • the torsional constant of each section in Case 1 and Case 2 is about 50 times and 100 times that of the case without the reinforcing member, respectively.
  • the elastic lateral buckling load of a large span beam is approximately proportional to the square root of the torsional stiffness, so in Case 1 and Case 2, it is about 7 times and about 10 times that of the I-shaped section before reinforcement, respectively.
  • Figures 17 and 18 show the test specimens and test methods used in the experiment (hereinafter referred to as Experiment 3) to confirm the effect of the half-split pipe 55 as a reinforcing member, and Figure 19 shows the test results. is there.
  • Experiment 3 was a bending test of a beam.
  • a half-mesh pipe 55 having a diameter of 89. Irani.
  • a thickness of 3.2 mm was welded to both sides of the web 4 as a reinforcing member.
  • the bending moment M was applied to both ends of the test piece, and the ⁇ direction deformations i and u 2 of the upper and lower flanges 2 and 3 were obtained.
  • the vertical axis represents the dimension of the bending moment M by the total plastic moment M P
  • the horizontal axis represents the dimension of the horizontal deformation 11 divided by the flange radiation b.
  • the line indicated by B 2 Is the relationship between the bending moment in the case of no reinforcement and the ⁇ -direction deformation of the upper and lower flanges 2 and 3 due to lateral buckling.
  • FIGS. 20 to 22 show still another embodiment in which the inside of the reinforcing member 65 having a groove-shaped cross section that forms a closed cross section can be used also as a duct for air conditioning or the like. is there.
  • FIG. 21 corresponds to the GG section of FIG. 20
  • FIG. 22 corresponds to the H—H section of FIG. It is desirable to attach the reinforcing member 65 to the entire length or a substantial part of the H-shaped ⁇ 1.
  • the reinforcing member 65 is fixed to the H-shaped web 1 by bolts 66.
  • reference numeral 67 denotes a through hole provided in the H-shape type 1
  • reference numeral 68 denotes a connection port for a duct provided in the reinforcing member 65.
  • FIGS. 23 and 24 correspond to a modification of the embodiment of FIG.
  • the half-split pipe 55 was welded to the H-type 1, whereas in the embodiment of FIG. 23, the pipe was provided above and below the round tubular section 5 as a reinforcing part.
  • the substantially H-shaped structural member 71 is integrally formed with the T-shaped portions 72 and 73 to further streamline the cross section. Functionally, it is almost the same as the case of Fig.13. It can also be obtained by welding the web tip of a T-shaped rope.
  • the cross section of the reinforcing portion is circular, whereas in the embodiment of FIG. 24, the shape is close to a square (square tubular portion 75 ′).
  • FIGS. 25 to 27 show an embodiment in which the reinforcing portion can be used also as a duct for air conditioning or the like, similarly to FIGS. 20 to 22.
  • This corresponds to a structural member 71 composed of a net tubular portion 75 and ⁇ -shaped portions 72, 73.
  • Fig. 26 corresponds to the I-I cross section of Fig. 25
  • Fig. 27 corresponds to the J-J cross section of Fig. 25
  • 76 is a reinforcing rib provided at a predetermined interval
  • ⁇ 7 is a reinforcing portion.
  • a connection port provided in a direction perpendicular to the round steel tubular portion 75.
  • FIGS. 28 and 29 show an embodiment in which the present invention is applied to a truss structure.
  • FIG. 29 corresponds to a section taken along line K--K in FIG.
  • a reinforcing member 85 is arranged near the material end of the flat truss 81 as a truss beam, and the truss member's plastic deformation capacity is prevented by preventing the post-buckling resistance to the material end moment. Is improved.
  • the plane truss 81 of the present embodiment is composed of upper and lower chord members 82, 83, a vertical member 84a and an oblique member 84b as antinode members, and a reinforcing member 85 is arranged on a neutral axis.
  • the reinforcing member 85 Since the reinforcing member 85 is located on the neutral axis, it has almost no effect on the initial stress-deformation state, and the reinforcing member 85 can be arbitrarily arranged as necessary without changing the design of the truss. . In this case, the rigidity and strength of the web material to which the reinforcing member 85 is attached are important.
  • FIGS. 30 and 31 show another embodiment in which the present invention is applied to a truss structure.
  • FIG. 31 corresponds to a section taken along line L--L of FIG.
  • This embodiment is an example in which the reinforcing member 85 'is arranged so as to be deviated vertically from the neutral axis with respect to the above embodiment.
  • the slight deviation has no major change in the initial stress state, etc., and the deviation leads to a deformation of the chord material on the compression side, and a greater reinforcement effect can be obtained.
  • the graph of Fig. 35 shows the results of a simulation by numerical analysis of the load and deformation when the present invention is applied to a structural member of a truss structure.
  • Truss 91 (in the figure, 92 is upper chord material, 93 is lower chord material, 94 is abdominal material, 95 is Is a reinforcing member) about,
  • the neutral axis of the truss beam at that portion shifts to the tension side, and the deterioration of the it force on the compression side is sequentially assigned to the neutral axis or the reinforcing member 95 provided near the neutral axis. Go. Therefore, by inserting the reinforcing member 95, it is possible to prevent a reduction in ft force of the truss beam as a whole after the string material on the crane side yields, and to exert stable deformation performance.
  • Figures 36-41 are above!
  • Figure 3 shows the deformation diagram and the member stress diagram at the three loading stages a to c in the graph of Fig. 35 (Fig. 36 and Fig. 37 show the loading stage of a, Fig. 3 8 and 39 correspond to the load stage of b, and FIGS. 40 and 41 correspond to the load stage of c).
  • the deformation is shown about 5 times larger, and the stress diagram shows only the upper and lower chords and the reinforcing members.
  • Experiment 4 is a shear bending experiment of the truss beam 101.
  • the upper and lower chords 102, 103 have an outer diameter of 89.1 ⁇ , a pipe thickness of 3.2 mm, and a length of 400 strokes.
  • Bore tube, abdominal material 104 a, 104 b have outer dimensions of 60.5 mm (only the abdominal material of the portion receiving the end of reinforcing member 105 is 89.1 mm), and tube thickness 3 A 2 mm pipe pipe and a mesh pipe pipe of 89.1 mm outer shape and 3.2 stroke thickness were used for the reinforcing member 105 on the neutral shaft.
  • a shear bending load P was applied to the test piece to determine a bending deformation ⁇ .
  • the vertical axis shows the dimension of the shear bending load ⁇ by the yield load P y and the horizontal axis shows the bending deformation by the yield deformation of 5 y .
  • a solid line indicated by A is a case where the reinforcement of the present invention is performed, and a broken line indicated by B is a case where the reinforcement is not performed.
  • the strength decreases with the buckling of the compressed chord material (upper chord member 102), but in the reinforced truss beam of the present invention, the reinforced truss beam loses its compressive strength. Despite the occurrence of buckling of the string material, the load can be stably maintained.
  • reinforcement members arranged on or around the neutral shaft bear the decrease in load-carrying capacity, and as a whole structural members Can be effectively prevented from collapsing.
  • reinforcing member at or near the neutral axis of the structural member, it hardly contributes to the initial stress deformation state, and the design is not complicated.
  • the present invention can also be applied to structural members of existing structures.
  • the closed section formed by the reinforcing member can also be used as a duct, and the space can be effectively used.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Rod-Shaped Construction Members (AREA)

Abstract

Structure de renforcement pour empêcher la dégradation de la limite apparente d'élasticité résultant du flambage de pièces côté compression d'un élément de section en H ou d'un élément de structure en treillis utilisé en architecture et dans le bâtiment et les travaux publics. Un élément de renforcement s'étendant dans le sens de l'axe d'un élément de construction est prévu sur ou à proximité de l'axe neutre de l'élément de construction, n'influant g uère sur un état initial de contrainte dans ledit élément. Lorsqu'un flambage local est provoqué dans une semelle côté compression d'un acier en forme de H utilisé comme pilier ou poutre ou dans une membrure d'une structure en treillis côté compression, l'élément de renforcement supporte la charge dans le sens de l'axe de l'élément de construction et empêche ainsi une dégradation soudaine de la limite apparente d'élasticité. La mise en ÷uvre d'un tube acier fendu en deux parties égales comme élément pour former une partie de renforcement fermée en section à proximité de l'axe neutre permet d'empêcher un flambage latéral tout en assurant une action de renforcement contre le flambage local, et ladite partie de renforcement fermée peut s'utiliser pour le câblage ou les gaines de climatisation.
PCT/JP1992/000107 1991-02-05 1992-02-04 Structure de renforcement pour elements de construction Ceased WO1992014007A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP3/14105 1991-02-05
JP1410591 1991-02-05

Publications (1)

Publication Number Publication Date
WO1992014007A1 true WO1992014007A1 (fr) 1992-08-20

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WO (1) WO1992014007A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103696535A (zh) * 2013-12-26 2014-04-02 南京工业大学 波纹腹板梁高利用率圆形开洞配件
JP2018168624A (ja) * 2017-03-30 2018-11-01 大和ハウス工業株式会社 構造物
US10443239B2 (en) * 2016-12-02 2019-10-15 Columbia Insurance Company Long span masonry lintel support system
US10480197B2 (en) 2017-04-04 2019-11-19 Columbia Insurance Company Masonry support
WO2021023324A1 (fr) * 2019-08-08 2021-02-11 Christof Draheim Pièce d'installation en acier pour bâtiments pour le remplacement d'une région prédéterminée d'un composant en béton armé prévu pour recevoir des charges

Citations (10)

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Publication number Priority date Publication date Assignee Title
JP241231S (fr) * 1963-02-07 1964-12-18
JPS4735518U (fr) * 1971-05-15 1972-12-20
JPS4812179Y1 (fr) * 1968-12-18 1973-04-02
JPS51111715U (fr) * 1975-03-06 1976-09-09
JPS5269112U (fr) * 1975-11-18 1977-05-23
JPS5644299U (fr) * 1979-09-12 1981-04-21
JPS5961645A (ja) * 1982-09-27 1984-04-07 株式会社クボタ 増強梁の構成方法
JPS62202155A (ja) * 1986-03-03 1987-09-05 清水建設株式会社 梁貫通スリ−ブ
JPS6348797B2 (fr) * 1980-04-18 1988-09-30 Hitachi Ltd
JPH033207Y2 (fr) * 1987-04-17 1991-01-28

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP241231S (fr) * 1963-02-07 1964-12-18
JPS4812179Y1 (fr) * 1968-12-18 1973-04-02
JPS4735518U (fr) * 1971-05-15 1972-12-20
JPS51111715U (fr) * 1975-03-06 1976-09-09
JPS5269112U (fr) * 1975-11-18 1977-05-23
JPS5644299U (fr) * 1979-09-12 1981-04-21
JPS6348797B2 (fr) * 1980-04-18 1988-09-30 Hitachi Ltd
JPS5961645A (ja) * 1982-09-27 1984-04-07 株式会社クボタ 増強梁の構成方法
JPS62202155A (ja) * 1986-03-03 1987-09-05 清水建設株式会社 梁貫通スリ−ブ
JPH033207Y2 (fr) * 1987-04-17 1991-01-28

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103696535A (zh) * 2013-12-26 2014-04-02 南京工业大学 波纹腹板梁高利用率圆形开洞配件
US10443239B2 (en) * 2016-12-02 2019-10-15 Columbia Insurance Company Long span masonry lintel support system
JP2018168624A (ja) * 2017-03-30 2018-11-01 大和ハウス工業株式会社 構造物
US10480197B2 (en) 2017-04-04 2019-11-19 Columbia Insurance Company Masonry support
WO2021023324A1 (fr) * 2019-08-08 2021-02-11 Christof Draheim Pièce d'installation en acier pour bâtiments pour le remplacement d'une région prédéterminée d'un composant en béton armé prévu pour recevoir des charges
US12049760B2 (en) 2019-08-08 2024-07-30 Christof Draheim Steel installation component for buildings for replacing a predetermined region of a reinforced concrete component provided for load-bearing

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