KR101636246B1 - Steel-PC hybrid beam and manufacturing method thereof - Google Patents

Steel-PC hybrid beam and manufacturing method thereof Download PDF

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Publication number
KR101636246B1
KR101636246B1 KR1020150063716A KR20150063716A KR101636246B1 KR 101636246 B1 KR101636246 B1 KR 101636246B1 KR 1020150063716 A KR1020150063716 A KR 1020150063716A KR 20150063716 A KR20150063716 A KR 20150063716A KR 101636246 B1 KR101636246 B1 KR 101636246B1
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South Korea
Prior art keywords
flange member
lower flange
plate
steel
web
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KR1020150063716A
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Korean (ko)
Inventor
김강수
주현진
이득행
최일섭
최석동
Original Assignee
서울시립대학교 산학협력단
(주)연우건축구조기술사사무소
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Priority to KR1020150063716A priority Critical patent/KR101636246B1/en
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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
    • E04C3/29—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
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D2/00—Bridges characterised by the cross-section of their bearing spanning structure
    • 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

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Rod-Shaped Construction Members (AREA)

Abstract

The present invention relates to a steel-PC hybrid beam and a manufacturing method thereof which maximize a combination effect by assembling a lower flange member made of precast concrete and a steel web member, have excellent prestress introduction efficiency, and improve economic efficiency. The steel-PC hybrid beam of an overall U-shape is filled with concrete, and comprises: a lower flange member which is a precast concrete member disposed on a lower portion of a hybrid beam in a longitudinal direction of the hybrid beam and provided with a PS steel wire disposed therein in the longitudinal direction to introduce prestress on the lower portion of the beam; and a pair of web members of steel plates arranged on both sides of an upper surface of the lower flange member in parallel with each other and separated from each other.

Description

Steel plate-PC composite beam and manufacturing method thereof [0001]

The present invention relates to a steel plate-PC composite beam and a method for manufacturing the same, which is capable of maximizing the synthesis effect by assembling a lower flange member made of precast concrete with a web member made of steel, Lt; / RTI >

In recent years, there have been increasing demand for construction materials with reduced volume, shortened construction time and long-term high efficiency in the construction market. Therefore, various structural systems are being applied in consideration of air and workability.

The existing reinforced concrete wet method is not suitable for the recent trend of reducing the financial cost through shortening of the air because the air is lengthened due to complicated construction details.

In addition, there is a problem that the steel frame used as an alternative to the above-mentioned reinforced concrete trench is vulnerable to vibration performance, and there is a limitation in shortening the air due to complicated construction details of the steel-concrete composite joint.

On the other hand, unlike the above structural systems, the precast concrete structure (PC structure) in which members such as slabs and beams are molded in a mold in a factory is more suitable for realizing financial cost savings through shortening of the air as well as improving the quality of concrete.

However, in order to apply PC members to large structures, it is recognized that it is necessary to overcome the technical limitations of PC members due to the enlargement of the members, the constraints on the span length, and the workability problems such as transportation or weight.

In addition, there is a PC composite beam system that composes a steel and a slab in a factory by prefabricating a member made of steel and a part of concrete in advance and putting it in the field and placing it in order.

The PC composite material is applied to various sites because it can shorten the field work process and improve the workability and economical efficiency through synthesis of different dissimilar materials, and related technologies are also being developed.

For example, in Patent Application No. 10-2005-0079067, a method for manufacturing a prestressed steel composite beam capable of improving the structural performance of a member by combining a steel beam and concrete and introducing a prestressing method, and a technique for the steel composite beam produced thereby I am suggesting.

However, since the application technique introduces the prestress after the steel and the concrete are combined, there is a problem that introduction efficiency of the prestress can be considerably lowered due to the large axial stiffness and the bending stiffness of the steel beam. In addition, since the manufacturing process is complicated and a camber or the like may be deformed in the member, it is difficult to ensure stable quality because the joining to the member to be coupled to the upper portion is not smooth.

In order to solve the above-mentioned problems, the present invention provides a steel plate-PC composite beam and a manufacturing method thereof that are simple in manufacturing process and advantageous in quality control because the lower flange member made of PC member is assembled with a web member .

In the present invention, a PS steel wire is provided on a lower flange member, and a prestress can be introduced in advance. By introducing a prestress without eccentricity, a steel plate -PC composite beam capable of minimizing deformation of a beam, Method.

The present invention is to provide a steel plate-PC composite beam and a method of manufacturing the steel plate-PC composite beam which can utilize the web member, which is a steel material, as a permanent formwork to improve the workability and reduce the weight and weight of the PC member.

The present invention relates to a steel plate-PC composite beam, which is formed in a U-shape as a whole so as to fill concrete therein. The steel plate-PC composite beam is provided in a longitudinal direction of the composite beam, A lower flange member which is a precast concrete member having a PS steel wire and a prestress introduced into a lower portion of the beam; And a pair of web members arranged on both sides of the upper surface of the lower flange member so as to be spaced apart from each other and being steel plates; Wherein each of the web members is provided with a bonding plate having a lower end formed in an inner vertical direction to be coupled to an upper portion of the lower flange member, and on an upper surface of the lower flange member, at a position corresponding to the bonding plate of the web member, Wherein the end portions of the pair of rail plates are connected to each other by a connecting plate having a plurality of bolt holes, the connecting plate is formed to protrude by a predetermined length from one end of the lower flange member, A plurality of bolt holes are formed in an extended portion extending to the end of the rail plate, and a screw is formed on the outer circumferential surface of the rail plate so as to be fixed in the lower flange member, A predetermined length protruding into the web member Is coupled with a plurality of studs embedded in the concrete, the outer face of said web member to provide information -PC plate composite which is characterized in that the bracket mounted on the side beams are combined to form extruded.

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According to another preferred embodiment of the present invention, an upper flange member vertically formed as one side or both sides of the web member is integrally provided on the upper end of the web member.

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According to another preferred embodiment of the present invention, there is provided a steel plate-PC composite beam characterized in that the rail plate is welded to the joint plate to couple the web member and the lower flange member.

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According to another preferred embodiment of the present invention, the lower flange member is protruded by a predetermined length from the side of the web member, and the lower end of the bracket is mounted on the upper portion of the protruded portion of the lower flange member. do.

According to another preferred embodiment of the present invention, the bracket is formed in a U-shape so as to surround both side surfaces and a bottom surface of the beam coupled to the side surface.

According to another preferred embodiment of the present invention, a plurality of support plates for supporting brackets are coupled to a lower portion of the bracket.

According to another preferred embodiment of the present invention, the inner surface of the pair of web members is mutually supported by a plurality of spacing members.

The present invention relates to a method of manufacturing a steel plate-PC composite beam having a generally U-shape so as to fill concrete therein, and more particularly, to a method of manufacturing a composite steel plate, comprising: (a) applying a tensile force to a PS steel wire, ; (b) removing a tensile force at both ends of the PS strand to introduce a prestress into the lower flange member; And (c) parallelly coupling the web members, which are steel plates, on both sides of the upper surface of the lower flange member so as to be spaced apart from each other; The present invention provides a method of manufacturing a steel plate-PC composite beam.

According to another preferred embodiment of the present invention, in the step (a), the rail plate having a plurality of studs coupled to the lower surface thereof is installed on both sides of the upper surface of the lower flange member in the longitudinal direction, And the web member is provided with a joining plate having a lower end vertically formed on one side or both sides thereof so that the joining plate is engaged with the rail plate.

The present invention has the following effects.

First, the steel plate-PC composite of the present invention assembles the lower flange member made of the PC member with the web member, which is a steel plate, so that it is advantageous in terms of quality control while improving the productivity of the member.

Secondly, since a pair of steel members, which are steel members, can be utilized as a permanent formwork, the workability can be improved and the weight and weight of the members can be solved, which is a disadvantage of the PC member.

Third, after the composite beam is assembled, concrete is filled in the inside of the web member together with the slab concrete pouring at the site, so that the formwork process for the site laying and beam forming can be omitted. As a result, economic benefits such as improved workability, shortening of time, and labor cost reduction can be expected.

Fourth, the concrete placed on the inside of the web member prevents buckling of the web member, so that the structural performance is excellent.

Fifth, since the PS steel wire is provided in the lower flange member to introduce the prestress, it is synthesized with the steel frame after introduction of the prestress, so that the introduction efficiency of the prestress is improved. In addition, since the prestress can be introduced into the lower flange member without eccentricity, the deformation of the beam can be minimized, so that it can be smoothly bonded to the web member and is advantageous in improving the quality of the member.

Sixth, when the inner surfaces of the pair of web members are supported by the cavity-holding member, the web member can be prevented from being deformed by an external force or the like, and the integral with the concrete can be increased.

Seventh, since the joint plate and the rail plate are respectively provided on the upper surface of the web member and the lower flange member, the lower flange member and the web member, which are heterogeneous materials, can be easily bolted or welded together.

Eighth, since the studs are joined to the lower surface of the rail plate, the rail plate can be further integrated with the lower flange member, which is precast concrete.

1 is a perspective view of a steel plate-PC composite beam according to the present invention.
2 is a sectional view showing embodiments of steel plate-PC composite beams according to the present invention.
3 is a sectional view showing another embodiment of the steel plate-PC composite beam according to the present invention.
4 is a perspective view of a steel plate-PC composite beam of the present invention having a rail plate.
5 is a perspective view of a lower flange member provided with a stud.
Figs. 6 and 7 are cross-sectional views showing a web member and a lower flange member joined together by a stud. Fig.
8 is a cross-sectional view showing a web member and a lower flange member joined by welding;
9 is a cross-sectional view showing a web member and a lower flange member joined together by bolts;
10 is a perspective view of a steel plate-PC composite beam of the present invention provided with a connecting plate;
11 is a perspective view of a steel plate-PC composite beam of the present invention having a bracket.
12 is a perspective view of a steel plate-PC composite beam of the present invention provided with a U-shaped bracket;
13 is a perspective view of a steel plate-PC composite beam according to the present invention after concrete pouring.
14 is a view showing a process for a method of manufacturing a steel plate-PC composite beam according to the present invention.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings and preferred embodiments.

Fig. 1 is a perspective view of a steel plate-PC composite beam according to the present invention, and Fig. 2 is a sectional view showing embodiments of steel plate-PC composite beam according to the present invention.

As shown in FIGS. 1 and 2, the steel plate-PC composite beam of the present invention is formed in a U-shape as a whole so as to fill concrete C therein, A lower flange member 11 as a precast concrete member having a PS steel wire 111 in a longitudinal direction and having a prestress introduced into a lower portion thereof; And a pair of web members (12) arranged on both sides of the upper surface of the lower flange member (11) so as to be spaced apart from each other and being steel plates; . ≪ / RTI >

That is, in the steel plate-PC composite beam 1 of the present invention, the lower lower flange member 11 is made of concrete that is strong to compressive force, and the web member 12 is made of a light steel material having high tensile strength.

Since the concrete C can be filled between the pair of web members 12, it can be used as a permanent formwork, and the weight problem, which is a disadvantage of the PC member, is solved by reducing the weight of the member. Therefore, it is possible to maximize economy and workability.

As shown in FIGS. 2 (a) to 2 (b), the width of the lower flange member 11 made of precast concrete can be freely adjusted.

A shear connection member 16 for integrating the slab with the slab may be welded to the upper end of the web member 12.

3, when the upper flange member 13 is provided at the upper end of the web member 12, a front end coupling member 16 for integrating the upper flange member 13 with the slab is welded to the upper surface of the upper flange member 13, Can be combined.

As shown in FIG. 1 and the like, a PS steel wire 111 is provided in the longitudinal direction inside the lower flange member 11 to introduce a prestress into the lower portion of the beam.

Since the lower flange member 11 is made of precast concrete, it is easy to install a PS steel wire 111 to introduce a prestress therein.

Particularly, it is possible to form the composite beam 1 by introducing the prestress without eccentricity only in the lower flange member 11, so that deformation of the beam such as a camber can be minimized.

2, the inner surfaces of the pair of web members 12 can be configured to be mutually supported by a plurality of gap-maintaining members 15. [

The gap holding members 15 prevent the pair of web members 12 spaced apart from each other from being deformed inward due to an external force or the like or spreading outward due to a concrete side pressure.

The gap holding member 15 increases the contact area with the concrete C to increase the integrity with the concrete C.

3 is a sectional view showing another embodiment of the steel plate-PC composite beam according to the present invention.

3 (a) to 3 (e), an upper flange member 13 formed vertically to one side or both sides of the web member 12 may be integrally formed.

3 (a) and 3 (c), the upper flange member 13 is formed in the inner direction of the beam. In FIGS. 3b and 3d, the upper flange member 13 is formed in the outer direction of the beam .

When the upper flange member 13 is vertically formed on one side of the inside or outside of the web member 12, it can be formed by being bent integrally with the web member 12 composed of a steel plate.

3 (e), the upper flange member 13 is vertically formed on both sides of the inside and the outside of the beam. In this case, the upper flange member 13 may be welded to the upper portion of the web member 12 to form a built-up member.

The upper flange member 13 serves near the top of the beam.

3, each of the web members 12 is provided with a bonding plate 121 whose lower end is vertically formed in an inner vertical direction and which is coupled to the upper portion of the lower flange member 11. As shown in FIG.

3 (a) and 3 (d), the joining plate 121 is formed in the vertical direction inside the beam. In FIGS. 3 (b) and 3 (c), the joining plate 121 is formed in the outer vertical direction .

When the joining plate 121 is vertically formed on one side of the inside or outside of the web member 12, it can be formed by being bent integrally with the web member 12 composed of a steel plate.

3 (e), the bonding plate 121 is vertically formed on both sides of the inside and the outside of the beam. In this case, the bonding plate 121 may be welded to the lower portion of the web member 12 to form a built-up member.

The joining plate 121 not only facilitates engagement with the lower flange member 11 but also reinforces the lower flange member 11. [

4 is a perspective view of a steel plate-PC composite beam of the present invention equipped with a rail plate.

4, a rail plate 112 is provided on the upper surface of the lower flange member 11 at positions corresponding to the bonding plates 121 of the web member 12, respectively.

The lower flange member 11 and the web member 12 are each a heterogeneous material composed of a concrete and a steel plate. Therefore, in order to facilitate the coupling of the lower flange member 11 and the web member 12, which are heterogeneous materials, the rail plate 112, which is a steel plate, is attached in advance to the upper portion of the lower flange member 11, To engage the web member 12.

5 is a perspective view of a lower flange member provided with a stud.

5, the lower surface of the rail plate 112 is fixed in the lower flange member 11 so that threads are formed on the outer circumferential surface thereof and are coupled by the bonding plate 121 and the nut N, A plurality of studs 113 projected from the upper surface of the plate 121 by a predetermined length and embedded in the concrete C placed in the web member 12 are engaged.

The stud 113 integrates the rail plate 112 with the lower flange member 11, which is a precast concrete member.

Figs. 6 and 7 are cross-sectional views showing a web member and a lower flange member joined together by a stud. Fig.

As shown in FIG. 6, the stud 113 is threaded on the outer circumferential surface, protrudes above the rail plate 112, and is coupled to the joint plate 121 by the nut N.

The lower end of the stud 113 is engaged with the concrete in the lower flange member 11 so that the steel web member 12 and the lower flange member 11 which are concrete are integrated with each other to form the web member 12 and the lower flange member 11, RTI ID = 0.0 > 11 < / RTI >

A plurality of the studs 113 are provided along the longitudinal direction of the beam.

A through hole may be formed in the rail plate 112 so that the stud 113 can pass therethrough.

7, the bonding plate 121 is vertically formed inwardly of the web member 12, and the upper portion of the stud 113 protrudes from the upper surface of the bonding plate 121 by a predetermined length, 12 in the concrete (C).

Thus, the upper end of the stud 113 passes through the rail plate 112 and the bonding plate 121 in turn, and is exposed to the upper surface of the bonding plate 121.

The stud 113 is buried in the concrete C placed in the web member 12 and contributes to the integration with the concrete C and the horizontal shear force between the inner concrete C and the lower flange member 11 resists the interface delamination prevent.

A plurality of the studs 113 are provided along the longitudinal direction of the beam.

Similarly, a through hole may be formed in advance in the rail plate 112 and the bonding plate 121 so that the stud 113 can pass therethrough.

8 is a cross-sectional view showing a web member and a lower flange member joined by welding;

As shown in FIG. 8, the rail plate 112 is welded (W) to the joint plate 121 so that the web member 12 and the lower flange member 11 can be engaged.

That is, the steel rail plate 112 and the welding plate 121 can be welded to each other, and welded to the rail plate 112 by welding both sides of the welding plates 121 as shown in FIG.

9 is a sectional view showing a web member and a lower flange member joined by bolts.

The web member 12 and the lower flange member 11 can be engaged by the bolts B passing through the lower flange member 11 and the joint plate 121 as shown in Fig.

That is, when the joining plate 121 is directly located on the upper surface of the lower flange member 11 instead of the rail plate 112, the lower flange member 11 and the joining plate 121 are sequentially passed through the bolts B The web member 12 and the lower flange member 11 can be engaged.

9, the bolt B passes through from the lower end to the upper end of the lower flange member 11, and the nut N is fastened to the upper end of the bolt B protruded above the lower flange member 11, The member 12 and the lower flange member 11 are engaged.

The upper end of the bolt (B) protruding above the lower flange member (11) is buried in concrete and serves as a shear connection member.

10 is a perspective view of a steel plate-PC composite beam of the present invention provided with a connecting plate.

10 (a) and 10 (b), the end portions of the pair of rail plates 112 are connected to each other by a connecting plate 114 having a plurality of bolt holes, A plurality of bolt holes are formed in a portion of the web member 12 that extends to the end of the connection plate 114 and extends.

As a method of joining the steel plate-PC composite beam 1 of the present invention to a column, there is a method of placing the composite beam 1 on the upper part of a PC column like a PC beam member.

Alternatively, when the composite beam 1 is joined to the steel column or the CFT column side, the web member 12 and the connecting plate 114 are connected to the column flange member 11 So as to protrude.

Therefore, the composite member 1 can be coupled to the column by connecting the portion of the web member 12 or the coupling plate 114 protruding from the lower flange member 11 to the side of the column.

11 is a perspective view of a steel plate-PC composite beam of the present invention having a bracket.

As shown in FIG. 11, a bracket 14 is mounted on the outer side surface of the web member 12 so as to protrude therefrom.

A beam joining to the side surface of the composite beam (1) is positioned above the bracket (14).

The bracket 14 is fixable to the web member 12 by bolting or welding.

The lower flange member 11 is protruded by a predetermined length from the side of the web member 12 and the lower end of the bracket 14 is mounted on the protruding portion of the lower flange member 11. [

The brackets 14 can be mounted on the upper flange member 11 and supported when the dances between the composite beam 1 and the side beams 2 are not significantly different.

12 is a perspective view of a steel plate-PC composite beam of the present invention provided with a U-shaped bracket.

As shown in FIG. 12, the bracket 14 can be formed in a U-shape so as to enclose both sides and a bottom surface of the beam 2 coupled to the side surface.

There is a problem in that when the beam 2 is supported on the lower flange member 11, the amount of the bracket 14 becomes excessively large when the difference in dancing between the composite beam 1 and the side beam 2 is large .

The brackets 14 can independently support the beams 2 while the brackets 14 are formed in a U shape to firmly fix the brackets 14 as well as to secure the brackets 14 Make sure the position is stable.

A plurality of support plates 131 for supporting the bracket 14 may be coupled to the lower portion of the bracket 14.

That is, the lower portion of the bracket 14 can be reinforced with the support plate 131 so that the bracket 14 can support the small beam 2 independently.

In the embodiment of Fig. 12, the support plate 131 is joined to the lower side of the bracket 14 and the side surface of the web member 12, with both side surfaces being adjacent to each other.

13 is a perspective view of the steel plate-PC composite beam of the present invention after concrete is poured.

13 is a perspective view showing the state after the concrete slab concrete and the concrete inside the beam are laid, and can resist the load by the combined action of the floor slab and the steel beam.

14 is a view showing a process for a method of manufacturing a steel plate-PC composite beam according to the present invention.

A method for manufacturing a steel plate-PC composite beam according to the present invention is a method for manufacturing the steel plate-PC composite beam (1) as described above, wherein (a) a tensile force is applied to a PS steel wire (111) Fabricating a lower flange member (11); (b) removing a tensile force at both ends of the PS steel wire (111) to introduce a prestress into the lower flange member (11); (C) joining the web members (12), which are steel plates, on both sides of the upper surface of the lower flange member (11) in parallel so as to be spaced apart from each other; And a control unit.

14 (a) to 14 (d), a method for manufacturing a steel plate-PC composite beam of the present invention will be described.

First, (a) a tensile force is applied to the PS steel wire 111, and the concrete (C) is laid to manufacture the lower flange member 11. [

That is, as shown in FIG. 14 (a), the PS steel wire 111 is tensioned to apply tensile force, and then the concrete C is laid and cured as shown in FIG. 14 (b) do.

In the step (a), the rail plate 112 having the plurality of studs 113 coupled to the lower surface thereof may be installed on both sides of the upper surface of the lower flange member 11 in the longitudinal direction, and then the concrete C may be installed.

Next, (b) a tensile force is removed at both ends of the PS steel wire 111 to introduce a prestress into the lower flange member 11 (Fig. 14 (c)).

That is, by releasing the tension of the PS steel wire 111 and introducing the prestress into the member, the tensile force largely acting on the lower portion of the beam can be canceled.

Finally, (c) a web member 12, which is a steel plate, is coupled to both sides of the upper surface of the lower flange member 11 in parallel so as to be spaced apart from each other (Fig. 14 (d)).

The lower flange member 11 and the web member 12 can be coupled to each other by a variety of methods and can be joined using studs, welds, etc. as shown in FIGS.

Since the rail plate 112 is coupled to the upper surface of the lower flange member 11 in the step (a), the bonding plate 121 formed at the lower end of the web member 12 in the inner vertical direction in the step (c) And the joining plate 121 is engaged with the rail plate 112.

In the case of a general prestressed beam, since a prestress is introduced at the lower end of the beam, a camber may be generated in which the member is bent upward due to eccentricity at the lower part of the member. Accordingly, if a slab form or a deck plate is installed on the upper part of the beam, a gap is formed between the beam and the upper member, which causes a defect.

Thus, in the present invention, only the lower flange member 11 is formed of a PC member, the prestress is first introduced into the center of the PC member without eccentricity, and then the web member 12 is joined to the upper portion. Therefore, since the camber does not occur in the beam, the upper end of the beam 1 maintains a straight line, and it is easy to install a slab formwork or a deck plate on the upper side.

1: composite beam 11: lower flange member
111: PS steel wire 112: rail plate
113: stud 114: connecting plate
12: web member 121: bonding plate
13: upper flange member 131: support plate
14: Bracket 15:
16: shear connector 2: beam
B: Bolt C: Concrete
N: Nut W: Weld

Claims (18)

The present invention relates to a steel plate-PC composite beam (1) having a U-shape as a whole such that the concrete (C)
The steel plate-PC composite beam 1 is provided at a lower portion of the composite beam 1 in the longitudinal direction and has a PS steel wire 111 in its longitudinal direction, and a prestressed concrete member A flange member (11); And
A pair of web members 12 arranged on both sides of the upper surface of the lower flange member 11 so as to be spaced apart from each other and being steel plates; Respectively,
Each of the web members 12 is provided with a bonding plate 121 having a lower end formed in an inner vertical direction and coupled to an upper portion of the lower flange member 11,
A rail plate 112 is provided on the upper surface of the lower flange member 11 at positions corresponding to the joining plates 121 of the web member 12,
The end portions of the pair of rail plates 112 are connected to each other by a connecting plate 114 having a plurality of bolt holes. The connecting plate 114 is formed to protrude a predetermined length from one end of the lower flange member 11, The web member 12 has a plurality of bolt holes formed in a portion extending to an end of the connecting plate 114,
The lower surface of the rail plate 112 is fixed to the lower flange member 11 so that a thread is formed on the outer circumferential surface thereof and is joined by the bonding plate 121 and the nut N. The upper surface of the rail plate 112 is bonded to the upper surface of the bonding plate 121 A plurality of studs 113 embedded in the concrete C protruding by a predetermined length and placed in the web member 12 are engaged,
And a bracket (14) on which a beam (2) coupled to the side is mounted is protruded from the outer side surface of the web member (12).
delete The method of claim 1,
Wherein the upper end of the web member (12) is integrally provided with an upper flange member (13) vertically formed at one side or both sides thereof.
delete delete delete delete delete The method of claim 1,
Wherein the rail plate (112) is welded (W) to the joint plate (121) so that the web member (12) and the lower flange member (11) are engaged.
delete delete delete The method of claim 1,
Characterized in that the lower flange member (11) is protruded by a predetermined length from the side of the web member (12) and the lower end of the bracket (14) is mounted on the upper part of the protruded portion of the lower flange member Composite beams.
The method of claim 1,
The bracket (14) is formed in a U shape so as to surround both side surfaces and a bottom surface of the beam (2) coupled to the side surface.
The method of claim 14,
And a plurality of support plates (131) for supporting the brackets (14) are coupled to the lower portion of the bracket (14).
The method of claim 1,
And the inner surfaces of the pair of web members (12) are mutually supported by a plurality of spacing members (15).
A method for manufacturing a steel plate-PC composite beam (1) according to claim 1,
(a) applying tensile force to the PS steel wire (111) and casting the concrete (C) to manufacture a lower flange member (11);
(b) removing a tensile force at both ends of the PS steel wire (111) to introduce a prestress into the lower flange member (11); And
(c) joining the web members 12, which are steel plates, on both sides of the upper surface of the lower flange member 11 in parallel so as to be spaced apart from each other; Wherein the steel sheet and the composite steel sheet are welded to each other.
The method of claim 17,
In the step (a), the rail plate 112 having the plurality of studs 113 coupled to the lower surface thereof is installed on both sides of the upper surface of the lower flange member 11 in the longitudinal direction, and then the concrete C is installed.
Wherein the web member 12 is provided with a bonding plate 121 having a lower end vertically formed on one side or both sides thereof so that the bonding plate 121 is coupled to the rail plate 112. In the step (c) -Production method of PC composite beam.
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