KR20160149524A - Formed steel beam having neutral axis lifting elements and composite beam using the same - Google Patents
Formed steel beam having neutral axis lifting elements and composite beam using the same Download PDFInfo
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- KR20160149524A KR20160149524A KR1020150086657A KR20150086657A KR20160149524A KR 20160149524 A KR20160149524 A KR 20160149524A KR 1020150086657 A KR1020150086657 A KR 1020150086657A KR 20150086657 A KR20150086657 A KR 20150086657A KR 20160149524 A KR20160149524 A KR 20160149524A
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- steel plate
- plate unit
- bending steel
- plate
- strut
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- 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
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/24—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of metal
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
- E04B1/30—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts being composed of two or more materials; Composite steel and concrete constructions
-
- 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
- E04C3/09—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 at least partly of bent or otherwise deformed strip- or sheet-like material
-
- 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
- E04C3/29—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces built-up from parts of different material, i.e. composite structures
- E04C3/293—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces built-up from parts of different material, i.e. composite structures the materials being steel and concrete
Abstract
Description
The present invention relates to a steel beam for constituting a steel concrete composite beam in which a steel plate is made of a permanent formwork on a cross-section enclosure and a concrete is filled in a section, and more particularly to a composite beam using the same, The present invention relates to a steel beam that is stable even under a construction load and has an end reinforcement member and is improved in shear resistance, and to a composite beam using the same.
Steel Concrete Composite steel beam and concrete are made to behave as a single member, so that when the bending moment is applied, most of the compressive stress is made to be borne by the concrete and tensile stress is made to be imposed by the steel material. It is possible to reduce the stratification of the beam span and to increase the resistance strength and resistance stiffness of the beam section, thereby enabling the long span structure and increasing the extreme performance and deformation performance.
Steel Concrete Composite has been developed for a long time, one of which is a steel plate permanent composite composite beam in which the section of steel is concentrated on the tensile side of the structural member and the concrete is filled in. This is because the concrete is restrained by the U-shaped steel beam, and the flexural rigidity is increased. Therefore, the concrete is not exposed, and cracking and neutralization are prevented, thereby improving the durability. In addition, since the concrete of the composite beam and the slab is cured by being poured integrally, it is an economical and environmentally friendly method because structural integrity is secured and no separate formwork is used.
However, the U-shaped steel material is unstable due to the open cross-section during the construction stage before it is combined with concrete. The construction load causes the U-shaped steel beam to open. Especially, the cross-sectional compressive force acting on the compressive side of the upper part of the neutral shaft is unstable by making the open section more widened. In addition, both ends of the U-shaped steel beam are installed on both column members, and the construction load acts as a large shear force at the ends, so that local deformation may occur at the ends of the steel beam.
As a background of the present invention, there is a patent registration No. 10-1372643, 'No-form composite beam and its manufacturing method' (Patent Document 1).
This patent is made up of a cast steel plate lower flange forming a lower face, a cast steel plate web formed perpendicularly to both ends of a cast steel plate lower flange, and a cast steel plate upper flange formed at the upper end of the cast steel plate web, A U-shaped molded steel plate formed by molding a steel plate of a thin plate instead of a die; A portion of both ends of the molded steel plate is welded to the molded steel plate and welded to the molded steel plate so that the portion not buried in the molded steel plate is exposed in the molded steel plate so that it can be engaged with the steel column, An H-section to resist the composite section with the concrete; In order to minimize the cross-section of the steel plate and to eliminate the reinforcement in the field, the composite section is formed with the steel plate, the H-section steel, the concrete or the steel plate and the concrete, A stud bolt made of a stud bolt for an H-shaped weld and a stud bolt for a formed steel plate welded at a predetermined interval to the center of a lower flange of the formed steel plate; We propose a concrete composite structure consisting of concrete to be filled to fill the inside of a steel plate with a part of stud bolt and H - section.
According to the composite view proposed by this patent, the end portion where the maximum moment is applied depends on the stress distribution of the H-shaped section and the concrete is resistant to the cross section, and the mid section of the end section where the end moment acts is U- And concrete is designed to resist cross-section. This method is economical because it can reduce the amount of steel products with high raw material prices. However, the U-shaped steel plate is deformed excessively due to the application step load such as work load, And the thickness and the thickness of the formed steel sheet increase in response to the external force problem, the economical efficiency and the material efficiency are lowered.
Disclosure of Invention Technical Problem [8] Accordingly, the present invention has been made to solve the above problems occurring in the prior art, and it is an object of the present invention to provide a steel beam having a neutral axis elevation member and a composite beam using the steel beam elevation member to overcome instability of an open cross- .
In particular, it is an object of the present invention to provide a steel beam capable of reducing the widening of a cross section of a section opened in a construction step by raising the neutral axis and improving the shear force of the steel beam portion installed on the column member, and a composite beam using the same.
A steel material having a neutral axis elevating member according to a preferred embodiment of the present invention includes: a bending steel plate unit having a U- A height forming member coupled to the bending steel plate unit such that the bending steel plate unit has a height that protrudes to the upper portion of the bending steel plate unit at regular intervals in the longitudinal direction central portion of the bending steel plate unit; A slope member extending horizontally from both ends of the phase current to an upper end of the slope member and horizontally extending from an extending end of the slope member to be connected to the upper end of the upper current height member, And a strut reinforcement which is coupled in the cross section of the steel plate unit and installed in the longitudinal direction of the bending steel plate unit.
The bending steel plate unit includes a bottom plate, both side vertical plates vertically extending upward at both ends of the bottom plate, and an upper plate horizontally extending from the upper end of the vertical plate in a direction different from the bottom plate, And the strut reinforcement can be joined to the upper surface of the lower plate of the bending steel plate unit.
Alternatively, the bending steel plate unit may include a bottom plate, both vertical plates extending vertically upward from both ends of the bottom plate, and an upper plate horizontally extending from the upper end of the vertical plate in a direction different from the bottom plate, And the strut reinforcement can be joined to the inner surface of the vertical plate of the bending steel plate unit.
The height forming member includes an upper horizontal plate and a side leg plate extending downward from both ends of the upper horizontal plate so that an extended end of the side leg plate is coupled to the upper plate of the bending steel plate unit, The current can be coupled to the upper or lower surface of the upper horizontal plate.
Alternatively, the height forming member may be made of a length material of any one of a channel, an angle, a rectangular steel, a square pipe, and a Z-shaped steel, and both ends thereof may be coupled to both upper plates of the bending steel plate unit.
Alternatively, the height forming member may be composed of a length material of any one of a channel, an angle, a rectangular steel, a square or a Z-shaped steel, and both ends thereof may be coupled to the inner surface of the bending steel plate unit so as to protrude to the upper portion of the bending steel plate unit.
Here, the end portion of the bending steel plate unit may be closed because the filling groove is formed in a perforated plate shape, and the end portion of the bending steel plate unit is provided at the steel beam end portion.
On the other hand, a slope member which is inclined downwardly at both ends of the phase current at an image having a length shorter than the phase current of the strut reinforcement member, a bottom current member which extends horizontally at the extending end of the slope member so as to have a longer length than the bottom current of the strut reinforcement member And a second strut stiffener which is coupled to the upper end of the upper portion of the height forming member and is coupled to the end surface of the bending steel plate unit so that the lower end is parallel to the strut stiffener.
Or an inclined member extending horizontally at both ends of the lower end and an upper end extending horizontally at an end of the inclined member, the lower end being connected to the upper end of the height forming member The strand reinforcement strut may further include a strand reinforcing strut which is coupled to an end face of the bending steel plate unit so as to be parallel to the strut reinforcement and is provided inside the strut reinforcement.
A composite beam using a steel beam having a neutral axis elevating member according to another preferred embodiment of the present invention is a steel beam having a neutral axis elevating member; A bottom plate on which both ends are mounted on an upper end of a steel member bending steel plate unit having a neutral axis elevating member; And concrete placed in the bending steel plate unit and in the upper part of the bottom plate.
The steel material having the neutral axis elevating member according to the present invention is reinforced by the inclined material of the strut reinforcement to the end portion of the steel beam so as to prevent the local deformation of the end portion of the steel beam during the construction.
Further, a height forming member is formed on the upper side of the cross-section of the bent steel plate unit having the opened cross section and the upper current of the strut reinforcement member is coupled to the height forming member to raise the neutral axis, There is an effect to mitigate.
The composite beam and the slab can be integrally constructed using the steel beam having the neutral axis elevating member according to the present invention. In the steel beam having the neutral axis elevating member, the upper current configuration of the height forming member and the strut reinforcement is formed on the upper side of the cross- Therefore, it is possible to place the concrete on the site while omitting a separate device for laying the slab cast iron rope, thereby improving the workability.
BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate exemplary embodiments of the invention and, together with the description, serve to explain the principles of the invention, Shall not be construed as limiting.
1 is a perspective view of a steel beam having a neutral axis elevating member according to an embodiment of the present invention, and FIG. 2 is a sectional view taken along the line AA of FIG.
3 is a sectional view of a conventional U-shaped steel beam.
4 is a cross-sectional view showing various embodiments of the bending steel plate unit according to the present invention.
5 is a cross-sectional view illustrating various embodiments of a height forming member according to the present invention.
FIG. 6A is a perspective view of a steel beam having a neutral axis elevating member according to another embodiment of the present invention, and FIG. 6B is a sectional view.
FIG. 7A is a perspective view of a steel beam having a neutral axis elevating member according to still another embodiment of the present invention, FIG. 7B is a sectional view taken along line BB of FIG. 7A, and FIG.
8A is a sectional view of a steel beam having a neutral axis elevating member according to another embodiment of the present invention, and FIG. 8B is a DD sectional view of FIG. 8A.
9 is a cross-sectional view of a composite beam using a steel beam having a neutral axis elevating member according to the present invention.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the embodiments shown in the accompanying drawings, but the present invention is not limited thereto.
FIG. 1 is a perspective view of a steel beam having a neutral axis elevating member according to one embodiment of the present invention, and FIG. 2 is a cross-sectional view taken along the line A-A of FIG.
A steel material having a neutral axis elevating member according to the present invention includes: a bending steel plate unit (10) having a U-shaped cross section with an open top and a predetermined length; A
The bending
The
Further, the
The
The
The phase current 31 of the
The
The
3 is a sectional view of a conventional U-shaped steel beam.
In order to form slabs in the construction stage of existing U-shaped steel beams, a U-shaped steel beam upper flange is mounted with a form plate, a deck plate or a precast concrete panel. Such a construction load causes the U-shaped steel beam to open. In particular, the cross-sectional compressive force acting on the compression side of the upper portion of the neutral shaft makes the open cross-section more widened and unstable.
2 and FIG. 3, it can be seen that the neutral axis of the steel beam having the neutral axis elevation member according to the present invention is formed higher than the neutral axis of the conventional U-shaped steel beam (l 1 > l 2 ).
The present invention is characterized in that the
4 is a cross-sectional view showing various embodiments of the bending steel plate unit according to the present invention.
4A, the present invention is not limited to this. In the range of providing a U-shaped open cross-section, as shown in FIGS. 4B and 4C, the bending
5 is a cross-sectional view illustrating various embodiments of a height forming member according to the present invention.
The
FIG. 6A is a perspective view of a steel beam having a neutral axis elevating member according to another embodiment of the present invention, and FIG. 6B is a sectional view.
In this embodiment, the
1 and 2, the
1 and 2, the
FIG. 7A is a perspective view of a steel beam having a neutral axis elevating member according to still another embodiment of the present invention, FIG. 7B is a cross-sectional view taken along line B-B of FIG. 7A, and FIG.
In this embodiment, a second
Further, in the present embodiment, the end reinforcing
8A is a cross-sectional view of a steel beam having a neutral axis elevating member according to still another embodiment of the present invention, and FIG. 8B is a cross-sectional view taken along the line D-D of FIG. 8A.
In this embodiment, a further
9 is a cross-sectional view of a composite beam using a steel beam having a neutral axis elevating member according to the present invention.
The
As described above, according to the present invention, the shear force is reinforced by the inclined material of the strut reinforcement to the end portion of the steel beam, thereby preventing the local deformation of the end portion of the steel beam during the construction.
Further, a height forming member is formed on the upper side of the cross-section of the bent steel plate unit having the opened cross section and the upper current of the strut reinforcement member is coupled to the height forming member to raise the neutral axis, There is an effect to mitigate.
Since the composite beam and the slab can be integrally formed and the upper beam current of the height forming member and the strut reinforcement is formed on the upper side of the cross section of the bending steel plate unit in the steel beam having the neutral axis raising member, It is possible to place the concrete on the spot while omitting it, thereby improving the workability.
While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art in light of the above teachings. will be. The invention is not limited by these variations and modifications, but is limited only by the claims appended hereto.
10: Bending steel plate unit 11: Lower plate
12: vertical plate 13: upper plate
111: connecting plate 20: height forming member
21: upper horizontal plate 22: side leg plate
23: Lower horizontal plate 30: Strut reinforcement
31: phase current 32: slope material
33: bottom 30a: second strut reinforcement
30b; Strand 40: End reinforcement cover plate
41: filling groove 50: concrete
51: bottom plate
Claims (10)
A height forming member 20 coupled to the bending steel plate unit 10 such that the bending steel plate unit 10 has a height projecting to the upper portion of the bending steel plate unit 10 at regular intervals in a longitudinally central portion of the bending steel plate unit 10; And
An inclined member 32 extending horizontally and inclined downward at both ends of the phase current 31 and the phase current 31 and a lower current 33 extending horizontally from the extending end of the inclined member 32, A strut is provided in the longitudinal direction of the bending steel plate unit 10 so that the phase current is coupled to the upper end of the height forming member 20 and the lower current 33 is joined to the end face of the bending steel plate unit 10, And a reinforcing member (30).
In the bending steel plate unit 10,
A pair of vertical plates 12 vertically extending upward at both ends of the lower plate 11 and an upper plate 13 horizontally extending from the upper end of the vertical plate 12 in a direction different from the lower plate 11 ≪ / RTI >
The height forming member 20 is joined to the upper portion of the upper plate 13 or the vertical plate 12 of the bending steel plate unit 10,
Characterized in that the strut reinforcement (30) is joined to the upper surface of the lower plate (11) of the bending steel plate unit (10).
In the bending steel plate unit 10,
A pair of vertical plates 12 vertically extending upward at both ends of the lower plate 11 and an upper plate 13 horizontally extending from the upper end of the vertical plate 12 in a direction different from the lower plate 11 ≪ / RTI >
The height forming member 20 is joined to the upper portion of the upper plate 13 or the vertical plate 12 of the bending steel plate unit 10,
Wherein the strut reinforcement member (30) is joined to the inner surface of the vertical plate (12) of the bending steel plate unit (10).
The height forming member (20)
And a side leg plate 22 extending downward from both ends of the upper horizontal plate 21 so that an extending end of the side leg plate 22 is connected to the upper plate 22 of the bending steel plate unit 10, (11) of the strut stiffener (30) is coupled to the upper surface or lower surface of the upper horizontal plate (21).
The height forming member (20)
And the both ends thereof are coupled to both side upper plates (13) of the bending steel plate unit (10), characterized in that they are made of a length material of any one of a channel, angle,
The height forming member (20)
And the both ends are connected to the inner surface of the vertical plate 12 of the bending steel plate unit 10 so as to protrude from the upper portion of the bending steel plate unit 10, A steel member having a neutral axis elevating member.
Further comprising an end reinforcing lid plate (40) formed of a perforated plate (41) and provided on the bending steel plate unit (10) at the steel plate end portion,
And the end portion of the bending steel plate unit (10) is closed.
A slope member 32a extending downward at both ends of the phase current 31a and slope member 32a extending downward from both ends of the phase current 31a and a bottom current of the strut stiffener 30 And the lower current 33a horizontally extending from the extending end of the inclined member 32a so as to have a longer length than the lower current 33a. The upper current 31a is coupled to the upper end of the height forming member 20, Further comprising a second strut reinforcing member (30a) fitted in the cross section of the bending steel plate unit (10) so as to be parallel to the strut reinforcing member (30) and provided inside the strut reinforcing member (30) Steel beam with.
An inclined member 32b extending upward at both ends of the lower end 31b and the lower end 31b which are horizontally formed of a horizontal length material and an upper end 33b extending horizontally at an end of the end 32b, So that the lower end 31b is engaged with the upper end of the height forming member 20 and the upper end 33b is engaged with the end surface of the bending steel plate unit 10 so as to be parallel to the strut stiffener 30, Further comprising a moment reinforcing strut (30b) provided on the inner side of the vertical reinforcement strut (30b).
A steel girder (1) having a neutral axis elevating member, a bottom plate (51) having both ends thereof fixed to the upper end of the bending steel plate unit (10); And
And a concrete (50) placed inside the bending steel plate unit (10) and on the top of the bottom plate (51).
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KR1020150086657A KR101797960B1 (en) | 2015-06-18 | 2015-06-18 | Formed steel beam having neutral axis lifting elements and composite beam using the same |
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KR1020150086657A KR101797960B1 (en) | 2015-06-18 | 2015-06-18 | Formed steel beam having neutral axis lifting elements and composite beam using the same |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20190110372A (en) * | 2018-03-20 | 2019-09-30 | 문종훈 | Composite deck member and slab using the same |
CN113356351A (en) * | 2021-06-16 | 2021-09-07 | 广州工程总承包集团有限公司 | Steel beam structure capable of being hoisted quickly and accurately and construction method thereof |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
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KR101372643B1 (en) | 2013-08-07 | 2014-03-11 | 장민우 | Formless composite beam and manufacturing method thereof |
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KR101499343B1 (en) * | 2013-09-12 | 2015-03-05 | (주)더나은구조엔지니어링 | Closed Built-up Beam, Hybrid Composite Beam and Strucutures using the same |
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Patent Citations (1)
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KR101372643B1 (en) | 2013-08-07 | 2014-03-11 | 장민우 | Formless composite beam and manufacturing method thereof |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20190110372A (en) * | 2018-03-20 | 2019-09-30 | 문종훈 | Composite deck member and slab using the same |
CN113356351A (en) * | 2021-06-16 | 2021-09-07 | 广州工程总承包集团有限公司 | Steel beam structure capable of being hoisted quickly and accurately and construction method thereof |
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