KR101868677B1 - Connection unit for coupling main steel girder and ancillary steel girder and, connection methods using the same - Google Patents
Connection unit for coupling main steel girder and ancillary steel girder and, connection methods using the same Download PDFInfo
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- KR101868677B1 KR101868677B1 KR1020160011166A KR20160011166A KR101868677B1 KR 101868677 B1 KR101868677 B1 KR 101868677B1 KR 1020160011166 A KR1020160011166 A KR 1020160011166A KR 20160011166 A KR20160011166 A KR 20160011166A KR 101868677 B1 KR101868677 B1 KR 101868677B1
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- Prior art keywords
- web
- steel beam
- auxiliary
- bar
- auxiliary steel
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 246
- 239000010959 steel Substances 0.000 title claims abstract description 246
- 230000001808 coupling Effects 0.000 title description 4
- 238000010168 coupling process Methods 0.000 title description 4
- 238000005859 coupling reaction Methods 0.000 title description 4
- 238000003466 welding Methods 0.000 claims description 23
- 230000003014 reinforcing Effects 0.000 claims description 8
- 238000011065 in-situ storage Methods 0.000 claims 2
- 238000010276 construction Methods 0.000 abstract description 14
- 239000000463 material Substances 0.000 abstract description 10
- 238000005336 cracking Methods 0.000 abstract description 8
- 210000001503 Joints Anatomy 0.000 description 7
- 206010057190 Respiratory tract infection Diseases 0.000 description 4
- 230000000875 corresponding Effects 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 238000006011 modification reaction Methods 0.000 description 4
- 230000001264 neutralization Effects 0.000 description 4
- 238000005452 bending Methods 0.000 description 3
- 230000000576 supplementary Effects 0.000 description 3
- 239000011324 bead Substances 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000007665 sagging Methods 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 1
- 230000003247 decreasing Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
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Images
Classifications
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- 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
- E04B1/2403—Connection details of the elongated load-supporting parts
-
- 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
- E04B1/38—Connections for building structures in general
- E04B1/58—Connections for building structures in general of bar-shaped building elements
-
- 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
- E04B1/2403—Connection details of the elongated load-supporting parts
- E04B2001/2415—Brackets, gussets, joining plates
-
- 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
- E04B1/2403—Connection details of the elongated load-supporting parts
- E04B2001/2418—Details of bolting
Abstract
In the present invention, the main steel beam and the auxiliary steel beam are connected by semi-rigid joining or steel joining to reduce deflection and cracking and vibration at the time of construction and use, thereby reducing the amount of steel material used, It has an advantage that it is easy.
Description
The present invention relates to a method of connecting a main steel beam and an auxiliary steel beam. More specifically, the present invention relates to a method of connecting a main steel beam and an auxiliary steel beam by means of semi-rigid joining or steel joining to reduce deflection and cracking and vibration at the time of construction, Accordingly, it is possible to reduce the amount of steel material used and to provide a simple and easy connection method for joining. In addition, the present invention also relates to a connection unit used in such a connection method.
Generally, steel bars are made of a high-strength homogeneous material, and thus have the advantage that a frame can be constructed with a minimum amount of water. However, when a steel frame structure made of a steel frame is applied to a building, there is a disadvantage in that it can not fully utilize the high strength, which is an advantage of the material, due to weak performance of deflection, cracking and vibration of the beam.
The building structure standard specifies restrictions (minimum requirements) for deflection and vibration of the beam. If steel bars are designed to meet these limitations, there will be room for member strength. In other words, when designing to meet the restrictions on deflection and vibration, there is a problem that excessive steel is used even though there is room for member strength.
When the steel span is L, the elastic modulus of the steel steel is E, and the moment of inertia is I, the deflection and vibration of the beam are related to L / (EI). At this time, L can not fluctuate due to the architectural plan, so it is necessary to control (increase) EI (stiffness) to control deflection and vibration.
However, an increase in E (elastic modulus) is not realistic because of an enormous cost increase, and an increase in I (sectional moment of inertia) should increase the height (dancing) or width or thickness of the cross section. It is possible to construct a composite structure coated with concrete to increase the I value, but it is a problem such as deterioration of quality, increase of weight of frame, complication of construction, complexity of construction, increase of construction period, increase of construction cost.
On the other hand, as another method of controlling sag and vibration, there is a method of installing a steel beam by steel bonding or semi-bonding instead of installing a steel beam by a pin bonding. Steel joints and semi-rigid joints are advantageous for vibration and deflection. For example, in the case of steel joints, the deflection can be reduced to a level of up to 1/5 (20% of the pin joint).
However, general steel joining or semi-rigid joining details are extremely rare in applications because of poor construction. Flange field welding to weld steel-frame joints is very difficult before welding the bottom flange before the slab is completed, construction cost and construction period are increased, and steel-welded steel beams using bolts in the form of end plates or brackets are theoretically possible. However, It is almost impossible to apply it due to the extremely low workability.
Accordingly, there is a need for a joining method which is excellent in performance against vibration, cracking and sagging, has excellent workability, and can reduce the amount of steel used.
SUMMARY OF THE INVENTION The present invention has been proposed in order to solve the above-described problems, and it is an object of the present invention to provide a steel frame structure in which a secondary steel beam is coupled to a main steel beam by steel bar joining or steel joining, And it is an object of the present invention to provide a simple and easy connection method that can reduce the amount of steel material used and thus reduce the deflection and cracking and vibration of the steel pipe.
In addition, another object of the present invention is to provide a connecting unit used in such a connecting method.
A connecting method according to the present invention is a method of connecting a lower flange 15 of a supplementary steel bar 10 to a web 33 of a main steel bar 30 by using a connecting unit 100, The web 13 of the auxiliary steel bar 10 is joined to the connecting flat plate 37 of the main steel bar 30 by web bolting and the upper flange 11a of the auxiliary steel bar 10 Is coupled to the upper flange 31 of the main steel beam 30 using the upper plate 200 and / or the field weld and / or the tensile bar 300. In the present invention, a steel material for prestressing may be used instead of the tensile steel bar 300.
The connecting unit 100a includes a top plate 110 having a predetermined number of first bolt holes 112 and a second bolt hole 122 formed at a position corresponding to the first bolt hole 112 A lower plate 120 disposed between the upper plate 110 and the lower plate 120 to maintain a gap between the upper and lower plates 110 and 120; An end plate 140 coupled to an end of the upper and lower plates 110 and 120 so as to be perpendicular to the upper and lower plates 110 and 120 and having a third bolt hole 142 formed therein; And a support member 150 installed on at least one of the upper plate 110 and the lower plate 120 to support the end plate 140. [
The lower flange 15 of the auxiliary steel beam 10a is inserted between the upper and lower plates 110 and 120 and the lower flange 15 is inserted through the first and second bolt holes 112 and 122 and the lower flange 15 The auxiliary steel bars 10 and 10a are connected to the connecting unit by the installation of bolts.
A bolt for fastening to the web 33 of the main steel beam 30 is provided on the third bolt hole 142 of the end plate 140.
The first and second bolt holes 112 and 122 may be elongated holes formed along the longitudinal direction of the upper and lower plates 110 and 120. Accordingly, the bolts installed in the first and second bolt holes 112 and 122 can be slip in the longitudinal direction before local buckling occurs.
According to the present invention, when the auxiliary steel beam 10a is connected to only one side of the main steel beam 30, it includes the following construction step. (A) installing a main steel beam 30 connected to the web 33 by a connecting flat plate 37; (b) installing the connecting unit 100 (100a) on the lower flange 15 of the auxiliary steel bar 10 (10a); (c) bolting the web 13 of the auxiliary steel bar 10 (10a) and the connecting flat plate 37 with bolts; (d) fitting the end plates 140 of the connecting units 100 and 100a to the web 33 of the main steel bar 30 and then tightening the bolts; And (e) an upper flat plate 200 covering the upper flange 11 of the secondary steel beam and the upper flange 31 of the main steel beam 30, and fastening the bolts to connect the upper flanges 11 and 31 to each other A tensile steel bar 300 passing over the main steel bar 30 and the auxiliary steel bars 10 and 10a in the longitudinal direction of the auxiliary steel bars 10 and 10a may be installed or the upper flanges 11 and 31 may be provided. And welding at least two of the upper flat plate 200, the tensile reinforcing bars 300 and the field welds.
On the other hand, when the auxiliary steel beams 10 and 10a are connected to both of the main steel beam 30, the following steps are included. (A) installing a main steel beam 30 connected to the web 33 by a connecting flat plate 37; (b) A connecting unit 100 (100a) is installed on the lower flange 15 of the auxiliary steel beam 10, and an auxiliary steel beam 10a (10a) to be installed on the opposite side of the auxiliary steel beam 10 around the main steel beam 30 (100a) to the lower flange (15) of the connecting member (100); (c) bolting the web 13 of the auxiliary steel bar 10 (10a) and the connecting flat plate 37 with bolts; (d) bringing the end plates 140 of the connecting units 100, 100a into close contact with each other on opposite sides of the web 33 of the main steel bar 30, and then fastening the bolts to each other; And an upper flat plate 200 covering the upper flange 11 of the auxiliary steel beam 10 and the upper flange 31 of the main steel beam 30 are installed and the bolts are fastened to the upper flange 11, A tensile steel bar 300 passing over the main steel bar 30 and the auxiliary steel bars 10 and 10a in the longitudinal direction of the auxiliary steel bars 10 and 10a may be provided, (11) (31) by field welding, or constructing at least two of the upper plate (200), the tensile reinforcing bars (300) and the field weld.
The stud bolts 19 are installed on the upper flanges 11 and 31 so that the tensile steel bars 300 and the slab concrete 310 and the auxiliary steel bars 10 are installed in the upper flanges 11 and 31, (10a) and the main steel bar (30) can behave integrally.
The bolt hole 201 of the upper flat plate 200 may be a long hole formed in the longitudinal direction of the upper flat plate 200 or the bolt hole 12 of the upper flange 11 may be a long hole formed long in the longitudinal direction of the auxiliary steel bracket. In this case, the slip of the bolt may be generated before the upper flat plate 200 is broken.
In step (b), among the first and second bolt holes 112 and 122, the bolt hole 16 of the bolt hole 16 of the lower flange 15 and the bolt hole of the center steel bolt 10a Only the bolts passing through the central bolt holes of the auxiliary steel bars 10 and 10a can be installed so that the connecting units 100 and 100a can be rotatably connected to the auxiliary steel bars 10 and 10a.
In the step (d), the connecting unit 100a is rotated about the center bolt hole of the beam so that the end plate 140 faces the web 33.
In the connecting method according to the present invention, the weight of the subsidiary steel bar 10 (10a), the load of the slab concrete 310 and the bolting connection of the web 13 or the ' The connecting unit 100 or 100a is operated under a simple connection condition and the upper plate 200 or the tensile bar 300 or the welding or upper plate 200 and the tension The structure can be designed assuming that the steel 300 or the welding and the tensile steel 300 behave as a rigid or semi rigid connection.
As an alternative to the structure designing method, the self-weight of the subsidiary steel bar 10, 10a, the load of the slab concrete 310, and the bolting connection of the web 13 and the connection unit 100 The bolting connection of the upper flat plate 200 or the web 13 and the connection unit 100 100a and the upper flange field welding are performed under rigid connection and the tensile force It is possible to design the structure assuming that the reinforcing bars 300 behave as a rigid or semi rigid connection condition.
The present invention has the following effects.
First, it is possible to reduce the sagging and cracking and vibration at the time of construction, and to reduce the amount of steel material by connecting the secondary steel beam to the main steel beam by connecting with the steel bar joint or steel joint, ≪ / RTI >
Secondly, a connection unit used in the above connection method is provided.
Third, in the connection structure between the secondary steel bridge and the main steel bridge, a method of designing the bolting connection of the web, the connecting unit and the upper flat plate (and / or the tensile steel and / or the upper flange field welding) .
1 is a perspective view showing a structure in which a main steel beam and a secondary steel beam are connected according to a first embodiment of the present invention;
Fig. 2 is an exploded perspective view of Fig. 1; Fig.
FIG. 3A is a perspective view showing a connecting unit used for connecting a main steel beam and an auxiliary steel beam. FIG.
Figure 3b is a front view of Figure 3a;
Figure 3c is a bottom view of Figure 3a.
4 is a perspective view showing another connecting unit used for connecting a main steel beam and an auxiliary steel beam.
Fig. 5 is a front view of Fig. 1; Fig.
Figure 6 is a left side view of Figure 3;
Fig. 7 is a plan sectional view of Fig. 3; Fig.
8 is a view showing that the connecting unit is temporarily fastened to the auxiliary steel beam.
9 is a perspective view showing a modification of an upper flat plate for connecting the upper flange of the main steel frame with the upper flange of the auxiliary steel frame.
10 is a plan view showing a structure in which a main steel beam and an auxiliary steel beam are connected using the upper plate of FIG.
11 is a perspective view showing a modification of the connecting unit.
12 is a front view showing a structure in which a main steel beam and a secondary steel beam are connected according to a second embodiment of the present invention;
13 is a front view showing a structure in which a main steel beam and a secondary steel beam are connected according to a third embodiment of the present invention;
14 and 15 are views showing a structure in which auxiliary steel bars are coupled to only one side of the main steel bars, respectively.
Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. Prior to this, terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary terms, and the inventor should appropriately interpret the concepts of the terms appropriately It should be interpreted in accordance with the meaning and concept consistent with the technical idea of the present invention based on the principle that it can be defined. Therefore, the embodiments described in the present specification and the configurations shown in the drawings are merely examples of the present invention and are not intended to represent all of the technical ideas of the present invention, so that various equivalents And variations are possible.
FIG. 1 is a perspective view showing a structure in which a main steel beam and a secondary steel beam are connected according to a first embodiment of the present invention, and FIG. 2 is an exploded perspective view of FIG.
Referring to the drawings, the method of connecting the steel bars is performed by using the connecting units 100, 100a, the web bolting, and the upper plate 200. That is, the lower flange 15 of the auxiliary steel bar 10 is joined to the web 33 of the main steel bar 30 by the connecting units 100a and 100a, The web 13 is joined by web bolting with the connecting flat plate 37 and the upper flange 11 of the auxiliary steel brackets 10 and 10a is joined by the upper flat plate 200.
The connecting units 100 and 100a are installed on the lower flange 15 of the auxiliary steel bar 10 and 10a to couple the lower flange 15 to the web 33 of the main steel bar 30. The coupling by the connecting unit 100 (100a) can be interpreted as conveying the compressive force generated in the cross section.
The connection units 100 and 100a control deflection of the beam when the upper plate 200 is installed at the time of construction. And, after the slab concrete is cured, the composite behavior reduces vibration and deflection. Further, the connecting units 100 (100a) serve to reinforce the bending strength of the end portions.
The connecting units 100 and 100a are respectively installed on both sides of the web 13 of the auxiliary steel bar 10 and the connecting units 100 and 100a may have the same shape, Lt; RTI ID = 0.0 > 15, < / RTI > 3a to 3c show a connecting unit 100 coupled to one side of the web 13 and Fig. 4 shows a connecting unit 100a coupled to the other side of the web 13. Fig. The connecting unit 100 and the connecting unit 100a have the same basic structure except that the side facing the web 13 is perpendicular to the end plate 140 and the side opposite to the web 13 is the end plate 140, respectively.
The connecting units 100 and 100a are connected to the ends of the upper plate 110 and the lower plate 120, the spacer plate 130 provided between the upper plate 110 and the lower plate 120 and the upper and lower plates 110 and 120 And an end plate 140 and a support member 150 for supporting the end plate 140 and the upper plate 110 and / or the lower plate 120.
A first bolt hole 112 is formed in the upper plate 110 at predetermined intervals along the longitudinal direction of the connection unit 100 or 100a and a second bolt hole 112 is formed in the lower plate 120 at a position corresponding to the first bolt hole 112 A second bolt hole 122 is formed. In the figure, three first and second bolt holes 112 and 122 are shown, but the number of the first and second bolt holes 112 and 122 may be increased or decreased in consideration of the lengths of the upper and lower plates 110 and 120, and the like.
The upper plate 110 and the lower plate 120 are spaced apart from each other by the spacing plate 130, and the lower flange 15 is inserted into the spaced spaces. The bolts are installed through the bolt holes 16 and the first and second bolt holes 112 and 122 in a state where the lower flange 15 is inserted between the upper and lower plates 110 and 120, (100) 100a is coupled to the auxiliary steel beam 10 (10a). At this time, since the spacer 130 has a length shorter than that of the upper and lower plates 110 and 120, it does not interfere with the bolt fastening. It is preferable that the upper surface of the spacer 130 is coupled to the upper plate 110 and the lower surface is coupled to the lower plate 120.
The end plate 140 is coupled to the upper ends of the upper and lower plates 110 and 120 so as to be perpendicular to the upper and lower plates 110 and 120 or the upper and lower plates 110 and 120, Lt; / RTI > A third bolt hole 142 is formed in the end plate 140. The third bolt hole 142 is preferably formed on both sides of the support member 150. The connecting unit 100 is joined to the web 33 by providing bolts to the third bolt holes 142 while the end plate 140 is arranged to be in contact with the web 33. [
The support member 150 is installed to contact the end plate 140 and the upper plate 110 to support the end plate 140 and the upper plate 110 at right angles. Although the support member 150 is provided on the upper plate 110 in the figure, when the end plate 140 is further extended downward than in the drawing, the support member 150 is installed on the lower plate 120, And may be installed in all of the lower plates 110 and 120 to support the end plate 140.
When the auxiliary steel bars 10 and 10a are respectively coupled to both sides of the main steel bar 30, the connecting units 100 and 100a are provided on both sides of the web 33, as shown in FIGS. The end plates 140 of the two connection units 100a and 100a are bolted together. Between the end plate 140 and the web 33, a chuck plate 148 may be provided to reduce the installation error. With this connection structure, the compressive force acting on the auxiliary steel bead 10 (10a) can be transmitted to the opposite auxiliary steel bead 10 (10a).
Meanwhile, FIG. 8 shows that the connection unit 100 (100a) is temporarily fastened to the auxiliary steel bar 10 (10a). The bolts are fastened through the bolt hole 16 of the lower flange 15 so as to penetrate the uppermost bolt hole among the bolt hole at the center of the bolt hole and the first and second bolt holes 112 and 122, The auxiliary steel bars 10 and 10a are lifted up by a crane or the like and then the connecting unit 100 or 100a is rotated so that the end plate 140 is rotated by the web 33).
The web 13 of the auxiliary steel bars 10 (10a) is bolted to the connecting flat plate 37. This coupling can be interpreted as a pin junction. The connecting flat plate 37 is joined to the web 33 of the main steel bar 30 and the upper and lower flanges 31 and 35 and is connected to the web 33 and the upper and lower flanges 31 and 35, Respectively. When the auxiliary steel bars 10 and 10a are respectively coupled to both sides of the main steel bar 30, the connecting flat plates 37 may be installed at positions corresponding to each other on both sides of the web 33. [
The upper plate 200 is installed along the longitudinal direction of the supplementary steel bars 10 and 10a so as to connect the supplementary steel bars 10 and 10a and the upper flanges 11 and 31 of the main steel bar 30 with each other. A plurality of bolt holes 201 are formed in the upper flat plate 200 and the bolt holes 201 are located at positions corresponding to the bolt holes 12 and 32 of the upper flanges 11 and 31. The upper flanges 11 and 31 are coupled to each other by fastening the bolts to the bolt holes 12 and 32 and 201, and this coupling can be interpreted as a steel joint or a steel joint.
Fig. 10 shows a modification of the upper plate 200. Fig. A bolt hole 201 is formed in the upper flat plate 200 as a long hole formed along the longitudinal direction of the auxiliary steel beam 10, 10a. When the auxiliary steel bar 10 and the main steel bar 30 are coupled to each other, a tensile force is mainly applied to the upper flange 11, and the tension of the bolt slip ) Is generated first. On the other hand, as an alternative to forming the bolt hole 201 as a long hole, the bolt hole 12 may be formed as a long hole.
11 shows a modified example of the connection unit 100, in which the first and second bolt holes 112 and 122 are formed as elongated holes formed along the longitudinal direction of the connection unit 100. When the auxiliary steel bar 10 and the main steel bar 30 are coupled to each other, a compressive force is mainly applied to the lower flange 15, and before the local buckling occurs due to the compressive force, . Although only the modification of the connection unit 100 is shown in the drawing, the first and second bolt holes 112 and 122 of the connection unit 100a may be formed as long holes. As an alternative to forming the first and second bolt holes 112 and 122 as long holes, the bolt hole 16 may be formed as a long hole.
12 is a front view showing a structure in which a main steel beam and a secondary steel beam are connected according to a second embodiment of the present invention.
As shown in the figure, the connection structure is the same as the connection structure of the first embodiment except that a tensile bar 300 and a stud bolt 19 are used instead of the upper flat plate 200. In this embodiment, the tensile bar 300 and the stud bolts 19 serve as the upper plate 200. On the other hand, a steel material for prestressing may be used instead of the tensile steel bar 300.
The tensile bar 300 is disposed so as to pass over the upper flanges 11 and 31 along the longitudinal direction of the auxiliary steel bar 10 and the stud bolts 19 ) Integrate the slab concrete 310 and the steel beam 10 (10a, 30). The above joints by the tensile bars 300, the stud bolts 19 and the slab concrete 310 can be interpreted as steel joints or steel joints.
13 is a front view showing a structure in which a main steel beam and a secondary steel beam are connected according to a third embodiment of the present invention. The connection structure is the same as that of the first and second embodiments except that the upper plate 200, the tension bar 300, and the stud bolts 19 are used together. Instead of the tensile bar 300, a steel material for prestressing may be used.
FIG. 14 shows a structure in which the auxiliary steel beam 10 is coupled to only one side of the main steel beam 30. The upper plate 200 has a length extending only from the auxiliary steel bar 10 to the main steel bar 30 and the bolts fastened to the end plate 140 couple the end plate 140 and the web 33 together.
The web 33 may be provided with a stud bolt 39 embedded in the concrete C.
15 shows a structure in which a tensile steel bar 300 is used in place of the upper plate 200 and an auxiliary steel bar 10 is coupled to only one side of the main steel bar 30. The tensile steel bars 300 are installed inside the slab concrete 310 and extend through the auxiliary steel beam 10 and the main steel beam 30.
How to design the connection structure
A method of designing a connection structure according to the present invention will now be described. As described above, since the connection structure is achieved by using the 'upper plate 200 and / or the tensile bar 300 and / or the upper flange field welding', the web bolting, and the connecting unit 100 (100a) And the design process is more complicated.
The design method proposed by the present invention is as follows. Assume that the bolting connection of the web, the connection unit, and the 'upper plate and / or tensile steel and / or upper flange field welding' are different joining conditions for each load- The design process can be simplified and the working time can be shortened compared with the conventional design method.
(1) Method A
The bolting connection of the web 13 or the 'bolting connection of the web 13 and the connecting unit 100' 100a 'in the loading step of the slab concrete 310 and the load of the auxiliary steel shaft 10 (10a) The upper plate 200 or the tensile steel bar 300 or the welding or the upper plate 200 and the tensile bar 300 or the welding and tensioning are performed in a simple support condition (pin connection) (300) 'behaves rigidly or semi-rigidly (Rigid or Semi rigid connection).
(2) Method B
The connection of the connection unit 100 (100a) and the upper plate (200) 'or the' web 'of the web (13) in the load of the slab concrete (310) The bolting connection of the connecting unit 100 and the upper flange field welding of the connecting unit 100 and the connecting flange of the connecting unit 100 are performed by a rigid connection and the tensile reinforcing bar 300 is welded or rolled Structural design is assumed on the assumption that it behaves as a rigid or semi rigid connection.
The above methods A and B are all constructed using the connecting units 100 and 100a. Method A is similar to deflection in comparison with general simple beam, and bending strength, cracking, and vibration performance are increased. Method B is somewhat more complicated than Method A. However, it has better deflection reduction during construction and increases bending strength, cracking and vibration performance.
Construction method of connection structure
Hereinafter, a method of connecting the auxiliary steel beam 10a and the main steel beam 30 according to the first embodiment of the present invention will be described.
First, a main steel beam 30 is installed. The main steel bridge 30 may be installed to connect the column to the column, or to connect the column to the beam or to connect the beam to the beam, which will be apparent to those skilled in the art .
Subsequently, as shown in FIG. 8, the connecting unit 100 (100a) is installed in the auxiliary steel bar 10 (10a). In the bolt hole 16 of the lower flange 15, By fastening the bolt only to the uppermost bolt hole (the uppermost first bolt hole in FIG. 8) of the bolt hole 112 (122), the connecting unit 100 (100a) can rotate about the bolt hole .
Next, after the auxiliary steel beams 10 and 10a are lifted to the main steel beam 30 by using a crane or the like, the auxiliary steel beams 10 and 10a are positioned to face each other with the main steel beam 30 facing each other.
When the lifting is completed, the web 13 is joined to the connecting flat plate 37. The givetting means not to completely fill the bolt but to loosely fasten it to the bolt hole so that the auxiliary steel bracelet 10 (10a) is supported.
When the gobot is completed, the end plate 140 rotates the connection unit 100 (100a) so as to face the web 33, and then the bolt is fastened to the third bolt hole 142, So that the end plate 140 is coupled via the web 33. With this structure, the compressive force acting on the lower flange 15 can be transmitted to the facing auxiliary steel bars 10 (10a).
Subsequently, the web 13 of the subsidiary steel bar 10 (10a) is connected to the connecting flat plate 37 with bolts, and the bolts are fastened to the remaining first and second bolt holes 112 (122).
Next, an upper flat plate 200 covering the upper flange 11 of the auxiliary steel bar 10 and the upper flange 31 of the main steel bar 30 is installed and the bolts are fastened to the upper flange 11 ).
In the connecting structure according to the present invention, a compressive force acts on the lower web 13 and the lower flange 15 with respect to the neutral neutral axis, and a part of the connecting unit 100 (100a) and the web 13 pays the compressive force Tension is exerted on the upper web 13 and the upper flange 11 with respect to the neutral neutral axis and the upper flat plate 200 and / or the tensile bar 300 (in the case of the second and third embodiments) and / The field weld and the rest of the web 13 bear the tensile force.
As described above, since the connecting structure according to the present invention has a semi-rigid joint or a strong joint, when the slab concrete is laid, the deflection of the center of the beam is reduced to 1/5 of that of the pin joint, Vibration is reduced when the building is used because it is connected by steel joint or steel joint. Therefore, the amount of steel material used can be reduced.
Although only the connection method of the first embodiment has been described above, those skilled in the art will be able to easily understand the connection methods of the second and third embodiments and the connection methods of FIGS.
10, 10a: auxiliary steel frame 11, 31: upper flange
13, 33: web 15, 35: bottom flange
12, 16, 32, 34, 201: bolt holes 19, 39: stud bolt
30: main steel frame 37: connecting flat plate
100, 100a: connection unit 110: top plate
112: first bolt hole 120: bottom plate
122: second bolt hole 130: spacer plate
140: end plate 142: third bolt hole
148: chin plate 150: support member
200: upper plate 300: tensile bar
310: Slab Concrete C: Concrete
Claims (11)
(a) installing a main steel beam (30) with a connecting flat plate (37) coupled to the web (33);
(b) installing the connecting unit 100 (100a) on the lower flange 15 of the auxiliary steel bar 10 (10a);
(c) bolting the web 13 of the auxiliary steel bar 10 (10a) and the connecting flat plate 37 with bolts;
(d) fitting the end plates 140 of the connecting units 100 and 100a to the web 33 of the main steel bar 30 and then tightening the bolts; And
(e) An upper flat plate 200 covering the upper flange 11 of the auxiliary steel beam 10 (10a) and the upper flange 31 of the main steel beam 30 is installed and the bolts are fastened to the upper flanges 11 A tensile reinforcing bar 300 passing over the main steel bar 30 and the auxiliary steel bars 10 and 10a in the longitudinal direction of the auxiliary steel bars may be provided or the upper flanges 11 and 31 may be installed on the site And welding at least two of the upper plate 200, the tensile bar 300, and the weld,
The bolting connection of the web 13 or the 'bolting connection of the web 13 and the connecting unit 100' 100a 'in the loading step of the slab concrete 310 and the load of the auxiliary steel shaft 10 (10a) The upper plate 200 and the tensile bars 300 or the upper flanges 11 and 31 are welded in situ by welding in a simple supporting condition (pin connection) Is characterized in that the structure design is performed assuming that the field welding of the upper flange 11 or 31 and the tensile bar 300 behave according to a rigid or semi rigid connection. How to connect main steel bridge and secondary steel bridge.
(a) installing a main steel beam (30) with a connecting flat plate (37) coupled to the web (33);
(b) A connecting unit 100 (100a) is installed on the lower flange 15 of the auxiliary steel beam 10, and an auxiliary steel beam 10a (10a) to be installed on the opposite side of the auxiliary steel beam 10 around the main steel beam 30 (100a) to the lower flange (15) of the connecting member (100);
(c) bolting the web 13 of the auxiliary steel bar 10 (10a) and the connecting flat plate 37 with bolts;
(d) bringing the end plates 140 of the connecting units 100, 100a into close contact with each other on opposite sides of the web 33 of the main steel bar 30, and then fastening the bolts to each other; And
(e) An upper flat plate 200 covering the upper flange 11 of the auxiliary steel beam 10 (10a) and the upper flange 31 of the main steel beam 30 is installed and the bolts are fastened to the upper flanges 11 A tensile steel bar 300 passing over the main steel bar 30 and the auxiliary steel bars 10 and 10a in the longitudinal direction of the auxiliary steel bars 10 and 10a may be installed or the upper flanges 11 (31) at the site by welding, or constructing at least two of the upper plate (200), the tensile bar (300) and the weld,
The bolting connection of the web 13 or the 'bolting connection of the web 13 and the connecting unit 100' 100a 'in the loading step of the slab concrete 310 and the load of the auxiliary steel shaft 10 (10a) The upper plate 200 and the tensile bars 300 or the upper flanges 11 and 31 are welded in situ by welding in a simple supporting condition (pin connection) Is characterized in that the structure design is performed assuming that the field welding of the upper flange 11 or 31 and the tensile bar 300 behave according to a rigid or semi rigid connection. How to connect main steel bridge and secondary steel bridge.
(a) installing a main steel beam (30) with a connecting flat plate (37) coupled to the web (33);
(b) installing the connecting unit 100 (100a) on the lower flange 15 of the auxiliary steel bar 10 (10a);
(c) bolting the web 13 of the auxiliary steel bar 10 (10a) and the connecting flat plate 37 with bolts;
(d) fitting the end plates 140 of the connecting units 100 and 100a to the web 33 of the main steel bar 30 and then tightening the bolts; And
(e) An upper flat plate 200 covering the upper flange 11 of the auxiliary steel beam 10 (10a) and the upper flange 31 of the main steel beam 30 is installed and the bolts are fastened to the upper flanges 11 A tensile reinforcing bar 300 passing over the main steel bar 30 and the auxiliary steel bars 10 and 10a in the longitudinal direction of the auxiliary steel bars may be provided or the upper flanges 11 and 31 may be installed on the site And welding at least two of the upper plate 200, the tensile bar 300, and the weld,
The connection of the connection unit 100 (100a) and the upper plate (200) 'or the' web 'of the web (13) in the load of the slab concrete (310) The bolting connection of the connecting bolts 13 and the field welding of the connecting units 100a and the upper flanges 11 and 31 behave as a rigid connection and the tensile reinforcing bars 300 ) Is designed to be rigid or semi- rigid connection, and the structural design is carried out.
(a) installing a main steel beam (30) with a connecting flat plate (37) coupled to the web (33);
(b) A connecting unit 100 (100a) is installed on the lower flange 15 of the auxiliary steel beam 10, and an auxiliary steel beam 10a (10a) to be installed on the opposite side of the auxiliary steel beam 10 around the main steel beam 30 (100a) to the lower flange (15) of the connecting member (100);
(c) bolting the web 13 of the auxiliary steel bar 10 (10a) and the connecting flat plate 37 with bolts;
(d) bringing the end plates 140 of the connecting units 100, 100a into close contact with each other on opposite sides of the web 33 of the main steel bar 30, and then fastening the bolts to each other; And
(e) An upper flat plate 200 covering the upper flange 11 of the auxiliary steel beam 10 (10a) and the upper flange 31 of the main steel beam 30 is installed and the bolts are fastened to the upper flanges 11 A tensile steel bar 300 passing over the main steel bar 30 and the auxiliary steel bars 10 and 10a in the longitudinal direction of the auxiliary steel bars 10 and 10a may be installed or the upper flanges 11 (31) at the site by welding, or constructing at least two of the upper plate (200), the tensile bar (300) and the weld,
The connection of the connection unit 100 (100a) and the upper plate (200) 'or the' web 'of the web (13) in the load of the slab concrete (310) The bolting connection of the connecting bolts 13 and the field welding of the connecting units 100a and the upper flanges 11 and 31 behave as a rigid connection and the tensile reinforcing bars 300 ) Is designed to be rigid or semi- rigid connection, and the structural design is carried out.
The stud bolts 19 are installed on the upper flanges 11 and 31 so that the tensile steel bars 300 and the slab concrete 310 and the auxiliary steel bars 10 are installed in the upper flanges 11 and 31, (10a) and the main steel bar (30) move integrally.
The bolt hole 201 of the upper flat plate 200 is a long hole formed in the longitudinal direction of the upper flat plate 200 or the bolt hole 12 of the upper flange 11 is a long hole formed long in the longitudinal direction of the auxiliary steel bracket,
Wherein a slip of the bolt is generated before the upper flat plate (200) is broken.
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| Application Number | Priority Date | Filing Date | Title |
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| KR1020160011166A KR101868677B1 (en) | 2016-01-29 | 2016-01-29 | Connection unit for coupling main steel girder and ancillary steel girder and, connection methods using the same |
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| KR1020160011166A KR101868677B1 (en) | 2016-01-29 | 2016-01-29 | Connection unit for coupling main steel girder and ancillary steel girder and, connection methods using the same |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20200000157U (en) | 2018-07-11 | 2020-01-21 | 이규순 | section steel connecting apparatus for iron frames of a structure |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112627333A (en) * | 2020-09-28 | 2021-04-09 | 北京赛博思工程技术研究院 | Bracket subassembly and be used for primary and secondary roof beam connected node of steel construction |
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