KR101549781B1

KR101549781B1 - Hybrid Composite Beam Having Reinforcing Bottom Plate

Info

Publication number: KR101549781B1
Application number: KR1020140038788A
Authority: KR
Inventors: 김성배; 이원록; 유중모
Original assignee: (주)더나은구조엔지니어링; (주)엔아이스틸
Priority date: 2014-04-01
Filing date: 2014-04-01
Publication date: 2015-09-07

Abstract

Disclosed is a composite beam which resists against an external force as a U-shaped steel beam and concrete are integrally synthesized. According to an appropriate embodiment of the present invention, the composite beam comprises: a steel beam having a pair of upper members, a lower member, and a lower reinforcing plate; and concrete placed inside the steel beam and cured, and integrally synthesized with the steel beam. The pair of upper members includes: an upper plate; a side plate extending vertically downwards from one end of the upper plate; and a lower plate extending in an opposite direction in parallel with the upper plate from a lower end of the side plate, and spaced apart in parallel such that cross sections thereof are symmetrical to each other. The lower member includes: a lower horizontal plate; a vertical plate extending vertically upwards from each of both ends of the lower horizontal plate; and an upper horizontal plate extending inwards in parallel with the lower horizontal plate from an upper end of the vertical plate. The lower reinforcing plate has a through hole formed at predetermined intervals in a central portion in a widthwise direction; is installed between the pair of upper members and the lower member; and combines the pair of upper members and the lower member by being bolted to the lower plate of the upper members and the upper horizontal plate of the lower member at the same time.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a hybrid composite beam having a lower reinforcing plate,

The present invention relates to a hybrid composite having a lower reinforcing plate, and more particularly, to a hybrid composite having a lower reinforcing plate and a lower reinforcing plate formed between the upper and lower members, And a lower reinforcing plate integrally formed by pouring concrete into a space formed by the upper and lower members of the pair.

Steel concrete beams are made of steel beams and reinforced concrete slabs so that they behave as a single member. When a bending moment is applied, most of the compressive stress is imposed on the concrete. The tensile stress is an effective structural member to reduce the dancing of the beam. It is possible to reduce the stratification of the building structure and to increase the resistance strength and resistance stiffness of the beam section to make the long span structure and to increase the extreme performance and deformation performance.

As a technology to be a background of the present invention, there is a patent registration No. 1161364, "improved composite beam" (patent document 1). This patent is applicable to a plurality of stud bolts attached to both sides of webs of sections or webs in a PC beam or a composite beam, a tensile member installed on both sides of the web of section steel, a tensile member fixing unit for attaching the tensile member to the web of the section steel, , An improved composite type composite box that includes concrete that is laid to a certain thickness by embedding both a tensile material and a tensile material fixed bed. Since the composite beam proposed by this patent is pre-manufactured, there is a merit that the construction work can be omitted, the material reduction and the air shortening can be shortened, and the amount of the refractory covering can be reduced. However, the lower web and the lower flange of the section steel are not poured The exposed part is required to have a refractory sheath, and the concrete surrounding the section steel acts as a refractory sheath of the section steel. However, there is a problem of durability in which the concrete is exposed to the outside and cracks and neutralization proceed.

As another technique to be a background of the present invention, there is a patent registration No. 1186267 entitled "Hybrid Composite Beam" (Patent Document 2).

This patent discloses a method of manufacturing a semiconductor device having an upper plate 111, a side plate 112 extending vertically downward from one end of the upper plate 111 and a lower plate 111 extending from the lower end of the side plate 112 in parallel with the upper plate 111 A side plate 112 extending vertically downward from one end of the upper plate 111 and a lower plate 111 extending from the lower end of the side plate 112 to the upper plate 111, An upper side member 11b composed of a lower plate 113 extending in parallel with the lower horizontal plate 121 and vertical plates 122 and 122 vertically extending upward at both ends of the lower horizontal plate 121, And upper and lower horizontal plates 123 and 123 extending outwardly from the upper ends of the vertical plates 122 and 122 in parallel with the lower horizontal plate 121, The concrete flow holes 16 are communicated with the lower plate 113 of the upper member 11a and the lower plate 113 of the upper member 11a and the upper horizontal plate 123 of the lower member 12, The lower plate 113 of the upper one side member 11a and the upper side side member 11b of the upper side member 11a are provided on the upper horizontal plate 123 of the lower member 12 in a state in which the one side member 11a and the upper side member 11b are symmetrically arranged, 11b and the bottom plate 113 of the lower member 12 are joined to each other and the space enclosed by the upper one side member 11a and the upper side member 11b and the lower member 12 are poured into concrete, Composite '.

However, this patent is disadvantageous in that the number of bolts for coupling the upper members 11a, 11b and the lower member 12 is large, and there is no additional mount for reducing the height of the bottom member.

Patent Registration No. 1161364 "Improved Composite Beam" Patent No. 1186267 entitled "Hybrid Composite Beam"

SUMMARY OF THE INVENTION The present invention has been made in order to solve the problems of the prior art described above, and it is an object of the present invention to provide a hybrid composite having a lower reinforcing plate of the present invention, And the concrete is placed in the inside of the section so that the cross section of the steel is concentrated on the tensile side sheath of the structural member and the cross section which is filled with concrete and can resist the stress effectively And a lower reinforcing plate is formed between the upper member and the lower member to increase the frictional contact surface between the upper member and the lower member so as to reduce the number of bolts to be joined, It can also be used as a shear key for the concrete to be filled and to increase the strength of the composite beam. And to provide a hybrid composite beam having a lower reinforcing plate that is effective.

In addition, there is also an effect of preventing the refractory covering material from flowing down by projecting the lower reinforcing plate to the outside, placing the PC bottom plate or deck end on the outer side of the protruded lower reinforcing plate and installing the slab concrete, And a lower reinforcing plate that can be formed on the lower reinforcing plate.

The present invention relates to an air conditioner comprising a top plate, a side plate extending vertically downward from one end of the top plate, and a bottom plate extending parallel to the top plate in a direction opposite to the bottom plate, A lower member including a pair of upper members, a lower horizontal plate, a vertical plate extending vertically upward at both ends of the lower horizontal plate, and an upper horizontal plate extending inwardly in parallel with the lower horizontal plate at an upper end of the vertical plate, , A through hole is formed at a central portion in the width direction at a predetermined interval, the lower plate of the pair of upper members and the upper horizontal plate of the lower member are bolted together at the same time, and are provided between the pair of upper and lower members, And a lower reinforcing plate for reducing a necessary number of bolts by increasing the interval between the bolts connecting the member and the lower member; And a concrete reinforced with a steel reinforcing plate, which is embedded in the steel beam and cured and is integrally synthesized with the steel beam.

The steel composite beam is formed with a concrete flow hole which is separately drilled in between the bolt fastening holes for bolt connection to the lower plate of the upper member and the upper horizontal plate and the lower reinforcing plate of the lower member. Lt; / RTI >

A width fixing member is provided to connect the side plates of the pair of upper members at regular intervals along the longitudinal direction of the steel beam so as to prevent a gap between the pair of upper members from spreading. A hybrid composite having a lower reinforcing plate is provided.

Also, the lower reinforcing plate has a bent portion formed in a shape of a corrugated shape by bending the central portion in the widthwise direction into a predetermined cross-sectional shape, thereby providing a hybrid composite having the lower reinforcing plate.

Further, the lower reinforcing plate has a lower reinforcing plate having a lower reinforcing plate, wherein the lower reinforcing plate has a front end connecting member formed of a stud, an angle and a plate at a predetermined interval on the upper and lower surfaces.

Further, the upper plate of the pair of upper members is provided with a stud bolt welded upward at a predetermined interval along the longitudinal direction of the steel beam so as to protrude upwards.

Further, the lower reinforcing plate is formed such that both end portions thereof protrude from the outer surface of the side plate of the upper member with a predetermined length.

Further, the present invention provides a hybrid composite having a lower reinforcing plate, wherein the vertical plate of the upper member is formed with stud bolts welded and fixed at regular intervals along the longitudinal direction of the steel beam.

The lower plate of the side plate is coupled to the upper plate of the upper member such that the upper plate faces the lower plate and the lower plate of the upper plate is parallel to the upper plate so that the cross- A pair of dancing adjusting members provided so as to connect the upper plates of the pair of dance adjusting members at regular intervals along the longitudinal direction of the steel beam so as to prevent a gap between the pair of dance adjusting members from spreading The present invention also provides a hybrid composite with a lower reinforcing plate, characterized by further comprising a fixing member.

The hybrid composite having the lower reinforcing plate of the present invention takes into account the stress generated in the composite beams to form a U-shaped cross-section by joining the roll-formed members of the steel sheet and a separate lower reinforcing plate at the lower side, The cross section of the steel material can be concentrated on the tensile side sheath of the structural member and the concrete can be filled in the steel material to have a cross section that can effectively resist stress and a lower reinforcing plate can be formed between the upper member and the lower member The frictional contact surface between the upper member and the lower member is increased to reduce the number of bolts to be jointed and to serve as a shear connection member with the concrete filled in the inner joint.

In addition, there is also an effect of preventing the refractory covering material from flowing down by projecting the lower reinforcing plate to the outside, placing the PC bottom plate or deck end on the outer side of the protruded lower reinforcing plate and installing the slab concrete, There is an effect that can be formed.

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.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a steel beam constituting a hybrid composite beam having a lower reinforcing plate according to the present invention. FIG.
2 is an exploded perspective view of a steel beam constituting a hybrid composite beam having a lower reinforcing plate according to the present invention.
FIG. 3 is a cross-sectional view illustrating a state in which concrete is poured into a hybrid composite beam according to an embodiment of the present invention.
FIGS. 4 and 5 are cross-sectional views illustrating a state in which concrete is poured into a hybrid composite beam according to various embodiments of the lower reinforcing plate of the present invention.
FIG. 6 is a cross-sectional view illustrating a state in which concrete is poured according to an embodiment to which the dancing adjusting member of the present invention is applied.

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.

The present invention relates to a composite beam integrally formed by casting concrete into a steel beam having a U-shaped cross-sectional shape with an open top as a whole by bolt joining a member manufactured by roll forming the hot-rolled coil.

Specifically, the upper member corresponding to the upper flange and the web is formed by roll forming with a single member, the lower member corresponding to the lower flange is rolled and bolted, and a lower reinforcing plate is provided between the upper member and the lower member So that the strength and rigidity of the composite beams can be increased while reducing the number of bolts to be jointed.

The upper member is composed of two parts and is coupled to the lower member at a distance from each other. Therefore, the steel material according to the present invention is composed of two upper members, one lower member, and a lower reinforcing plate coupled between the upper member and the lower member.

In other words, considering that the compressive force of the upper part in the composite beam is divided by the concrete, the upper flange is efficient in minimum size in order to maintain its shape, and the lower part of the central part receives a lot of tensile force, And the members constituting the lower flange are divided into separate members, and the members are joined together with bolts to constitute a steel beam.

In the following, description will be made on a composite beam after detailed description with reference to drawings of steel beams according to various embodiments of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a steel beam constituting a hybrid composite beam having a lower reinforcing plate according to the present invention. FIG.

The hybrid composite having the lower reinforcing plate according to the present invention includes a steel beam 100 and a concrete C which is embedded in the interior of the steel beam 100 and cured and integrally synthesized with the steel beam 100, The steel beam 100 is composed of a pair of upper members 10 and 10 spaced apart in parallel to each other and a pair of upper members 10 and 10 joined to each other via a lower reinforcing plate 30, And a lower member 20 connecting the upper members 10 and 10.

FIG. 2 is a partially exploded perspective view of a steel beam constituting a hybrid composite beam having a lower reinforcement plate according to the present invention, and FIG. 3 is a cross-sectional view illustrating a state of concrete pouring by a hybrid composite beam according to an embodiment of the present invention.

2, the steel beam 10 according to the present embodiment includes a pair of upper members 10 and 10, a lower member 12, a pair of upper members 10 and 10, And a lower reinforcing plate 30 which is fitted and joined between the members 12.

These members 10 and 20 can be manufactured by machining a steel sheet by a method known in the art so as to have a sectional shape as shown in the drawing, but in consideration of productivity and economical efficiency, a roll- desirable.

The upper member 10 includes an upper plate 11 extending horizontally outwardly and a side plate 12 extending vertically downward from one end of the upper plate 11 and a lower plate 11 extending from the lower end of the side plate 12 And a lower plate 13 extending in the opposite direction in parallel with the lower plate 13 so as to have a Z-shaped cross-sectional shape as a whole.

The width of the top plate 11 is determined by the length capable of stably supporting the form for slab concrete pouring and the width of the bottom plate 13 is a length that can provide a mating surface that can be bolted to the bottom member Lt; / RTI > Therefore, the widths of the top plate 11 and the bottom plate 13 may be equal to or different from each other. The upper members 10 are arranged symmetrically with respect to a vertical line passing through the center of the steel beam 100 at intervals from each other and bolted to the lower member 20.

The lower member 20 includes a lower horizontal plate 21 and upper and lower vertical plates 22 and 22 vertically extending upward from both ends of the lower horizontal plate 21, And upper horizontal plates 23 and 23 extending inwardly in parallel with the upper plate 21. Accordingly, the lower member 20 has a U-shaped cross-section with a lip as a whole.

Both sides of the bottom plate 13 of the pair of upper members 10 and 10 in the width direction of the lower reinforcing plate 30 and the upper horizontal plate 23 of the lower member 20 are passed through the bolt B and the nut N The upper and lower reinforcing plates 30 and 30 of the pair of upper members 10 and 10 and the upper horizontal plate 20 of the lower member 20, It is preferable that the bolt fastening hole is pre-punched in advance.

The lower reinforcing plate 30 is installed together when bolts B are fastened between the lower plate 13 of the pair of upper members 10 and 10 and the upper horizontal plate 23 of the lower member 20. [ This makes it possible to ensure a sufficient bonding strength even if the distance between the bolts B for coupling the pair of upper members 10, 10 and the lower member 20 is increased.

When the lower plate 13 of the upper members 10 and 10 and the upper horizontal plate 23 of the lower member 20 are directly bolted to each other, the lower surface of the lower reinforcing plate 30 Two side surfaces of the lower reinforcing plate 30, the lower plate 13, the lower reinforcing plate 30 and the horizontal plate 23 are formed to increase the frictional contact surface, thereby reducing the number of bolts to be joined .

The lower reinforcing plate 30 can simultaneously serve as a shear connection member to the concrete filled in the steel beam 100. When the concrete is laid inside the steel beam 100, It is possible to prevent the gap between the pair of upper members 10 and 10 from spreading and to close the lower member 20 to prevent the tensile crack from expanding upwardly, .

The lower plate 13 and the lower member 20 of the pair of upper members 10 and 10 can be filled tightly so that the concrete can be tightly filled even under the upper horizontal plate 23 of the lower member 20, The upper horizontal plate 23 of the lower member 20 and the lower vertical plate 23 of the lower member 20 of the pair of upper members 10 and 10 and the lower reinforcing plate 23 of the lower member 20 are fixed to each other in order to prevent the concrete from being separated from each other by the upper horizontal plate 23, The concrete flow holes 40 are drilled separately on both sides of the bolt fastening holes 30 for bolt connection. That is, the flow holes 40 of the lower plate 13 and the flow holes 40 of the horizontal plate 23 and the flow holes 40 of the lower reinforcing plate 30 are punched at the same positions to form stacked flow holes 40 So that the bottom of the horizontal plate 23 of the lower member 20 can be filled tightly.

In addition, the width fixing member 50 may be coupled with a predetermined interval along the longitudinal direction of the steel beam 100 to connect the side plates 12 of the pair of upper members 10, 10 to each other. The width fixing member 50 prevents the gap between the pair of upper members 10 and 10 from spreading due to the side pressure of the uncured concrete when the concrete is poured into the steel beam 100. As the width fixing member 50, any lightweight section steel known in the art such as a lightweight section and a lightweight section can be used.

The composite beam according to the present embodiment is filled with the concrete C in the steel beam 100, which is also effective for sagging and vibration. However, since tensile force is large in the lower part of the central part, concrete in the tensile force generating part needs a separate means for controlling the cracks when they occur. A reinforcing steel bar is additionally provided in the longitudinal direction on the upper surface of the lower watertight plate 21 of the lower member 20 in order to control the crack generation and increase the proof stress of the lower member 20. In the present invention, ) Closes the upper portion of the lower member 20, so that expansion of the tensile cracks is controlled to be unnecessary, and it is not necessary to provide a separate rebar.

The through holes 31 may be formed in the widthwise middle portion of the lower reinforcing plate 30 at predetermined intervals, and the bolts may be formed at both sides of the lower reinforcing plate 30 in the width direction at regular intervals.

The through hole 31 allows the lower member 20 to be tightly filled with concrete by the through hole 31 when the concrete C is poured into the steel beam 100, The steel member 100 does not break between the lower member 20 and the upper member 10 but integrates the concrete C with the steel member 100 as a steel member.

The steel beam 100 according to the present invention is constructed such that a pair of upper members 10 and 10 are coupled with a gap on the lower member 20 so as to have a U- The side plate 12 and the lower member 20 behave like the lower flange and the lower flange, respectively, in a state in which a hollow steel beam, .

Then, when the concrete C is poured into the opened upper part, the concrete C is filled into the inside of the end face, and the steel beam 100 and the concrete are integrally combined to constitute a composite beam resistant to external force.

A stud bolt 60 welded and fixed at predetermined intervals along the longitudinal direction of the steel beam 100 is formed on the upper plate 11 of the pair of upper members 10, So as to resist the horizontal shear force.

FIGS. 4 and 5 are cross-sectional views illustrating a state in which concrete is poured into a hybrid composite beam according to various embodiments of the lower reinforcing plate of the present invention.

As shown in Figs. 4A and 4B, the lower reinforcing plate 30 may be formed of a plate-shaped plate, as shown in Figs. 1 to 3, It is possible to improve the adhesion strength between the steel material and the concrete by providing the corrugated portion 33 having the corrugated shape bent in section.

The bent portion 33 may be formed to have a trapezoidal cross section as shown in FIG. 4A. Alternatively, as shown in FIG. 4B, the bent portion 33 may be formed so that a triangular cross section is repeated up and down. .

5A and 5B, the lower reinforcing plate 30 may be formed such that both ends of the lower reinforcing plate 30 protrude from the outer surface of the side plate 12 of the upper member 10 by a predetermined length.

As shown in FIG. 5A, the upper surface of the side plate 12 of the upper member 10 protrudes by a predetermined length to prevent the refractory covering material 80 from flowing down.

When the concrete C is cured by being placed in the steel beam 100, as shown in FIG. 5A, a part of the concrete C placed in the cross-section pierced into the steel beam 100 and in the beam top And behaves as a composite beam acting integrally with the steel beam 100, that is, a T-type composite beam.

The bottom surface of the composite beam, that is, the exposed surface of the steel beam 100, may be sprayed with a fireproof coating material 80 to impart fire resistance. Spraying work should be done after completion of foundation work for ceiling attachments required for ceiling ducts and piping, but the working time can be adjusted according to the site conditions. It is preferable to remove foreign matter such as dust, rust, oil, paint and so on on the work surface before spraying to secure adhesion and apply.

The lower reinforcing plate 30 has both end portions at a predetermined length from the outer surface of the side plate 12 of the upper member 10 because the fireproof covering material 80 to be sprayed can flow down from the side surface of the steel beam 100, So that the refractory covering material 80 is prevented from flowing downward by the projecting both side portions of the lower reinforcing plate 30. [

At this time, the length of the lower reinforcing plate 30 protruding outward of the steel beam 100 is made to protrude to the same or similar length as the thickness of the refractory covering material 80.

As shown in FIG. 5B, the length of the lower reinforcing plate 30 protruding outward of the steel beam 100 is longer than the length of the PC floor plate or deck D, It is also possible to use a reduced beam.

That is, the end portion of the PC bottom plate or deck D is not seated on the upper plate 11 of the upper member 10, but is mounted on the upper portion of the projected lower reinforcing plate 30, Is embedded in the floor slab so that the floor height can be reduced.

12 of the upper member 20 at predetermined intervals along the longitudinal direction of the steel beam 100 when the PC bottom plate or deck D is placed on the protruding end of the lower reinforcing plate 30, So that the stud bolt 221 is integrated with the PC deck or the slab concrete placed on the deck D to resist the shear force.

As shown in FIG. 5C, the lower reinforcing plate 30 is formed by forming a front end joint 32 composed of any one of a stud, an angle and a plate at regular intervals on the upper and lower surfaces, ) And the concrete (C).

In addition, in the case of a high load, the cross section of the composite beam should be formed large. However, the hybrid composite beam having the lower reinforcing plate of the present invention may be formed with a separate dancer member 70 on the upper portion thereof so as to increase the dancing of the composite beam, It is possible to reduce the floor height.

FIG. 6 is a cross-sectional view illustrating a state in which concrete is poured according to an embodiment to which the dancing adjusting member of the present invention is applied.

As shown in FIG. 6, a pair of dancer control members 70 and 70 are formed on the hybrid composite of the present invention.

The dancing adjusting member 70 is composed of a horizontal plate 71 formed horizontally and a side plate 72 extending vertically downward from one end of the horizontal plate 71, The lower ends of the upper and lower plates 72 are engaged with the upper plate 11 of the upper member 10 and are spaced apart in parallel so that their cross sections are symmetrical.

The side plate 72 is provided on the side plate 12 of the upper member 10 and the side plate 72 of the upper member 10 because the end of the bottom plate or the deck D is to be mounted on the outer side of the side plate 72, They may be joined to the top plate 11 of the upper member 10 on the same line by various methods such as welding or by joining to the top plate 11 at a portion spaced inwardly from the outer end of the upper member 10 do.

6, the end of the bottom plate or deck D is not mounted on the horizontal plate 71 of the dancing adjusting member 70, but the top plate 11 of the upper member 10, Or the end of the deck (D). As described above, the end of the PC bottom plate or the deck D is mounted on the top plate 11 of the upper member 10 so that the dancing adjusting member 70 is formed so that the enlarged dance is embedded in the bottom slab, It is also possible to use a beam height reduction type beam while forming the composite beam dance to expand.

The pair of dancer adjusting members 70 and 70 further provided on the upper portion of the steel beam 100 are constituted by the width fixing member 90 so as to prevent a gap between the pair of dancer adjusting members 70 and 70 from spreading do.

The width fixing member 90 is installed so as to connect the horizontal plates 71 of the pair of dancer adjusting members 70, 70 at regular intervals along the longitudinal direction of the steel beam 100.

The width fixing member 90 prevents the interval between the pair of dancer adjusting members 70 and 70 from spreading by the side pressure of the uncured concrete when the concrete is laid inside the steel beam 100. As the width fixing member 90, any lightweight section steel known in the art can be used, such as a lightweight section and a lightweight section.

Various known shear connection members 73 such as stud bolts are vertically formed on the horizontal plate 71 of the dancing adjusting member 70 at regular intervals in the longitudinal direction so that they can be integrated with the slab concrete For the same reason, the shear connection member 74 may be formed on the outer side of the side plate 72 at regular intervals in the longitudinal direction of the steel beam 100.

As described above, the hybrid composite having the lower reinforcing plate of the present invention is constructed so that the U-shaped cross section is formed by joining the roll-formed members of the steel sheet in consideration of the stress generated in the composite bow, and the concrete is laid in the cross- The cross section is concentrated on the tensile side skin of the structural member, the concrete is filled in the inside, and the cross section of the lower end portion is closed while having a cross section that can effectively resist the stress, so that high rigidity and endurance can be expected.

Further, by forming the lower reinforcing plate between the upper member and the lower member, it is possible to increase the frictional contact surface between the upper member and the lower member, thereby reducing the number of bolts to be joined and preventing the tensile crack from expanding upward.

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: upper member 11: upper plate
12: side plate 13: bottom plate
20: lower member 21: lower horizontal plate
22: Vertical plate 221: Stud bolt
23: upper horizontal plate 30: lower reinforcing plate
31: Through hole 32: Shear connector
33: bent portion 40:
50: width fixing member 60: stud bolt
70: a dancing adjusting member 71:
72: Vertical plate 80: Refractory covering material
90: width fixing member 100: steel beam
C: Concrete D: Deck
B: Bolt N: Nut

Claims

A side plate 12 extending vertically downward from one end of the upper plate 11 and a lower plate 11 extending in parallel to the upper plate 11 in the opposite direction from the lower ends of the side plates 12 A pair of upper members 10 and 10,
The lower horizontal board 21 and the vertical boards 22 and 22 vertically extending upward from both ends of the lower horizontal board 21 and the upper ends of the vertical boards 22 and 22 are disposed parallel to the lower horizontal board 21 A lower member 20 including upper horizontal plates 23 and 23 extending inward,
A through hole 31 is formed at a central portion in the width direction at a predetermined interval and is provided between the pair of upper members 10 and 10 and the lower member 20, 13 and a lower reinforcing plate 30 bolted to the upper horizontal plates 23 and 23 of the lower member 20 to couple the upper members 10 and 10 to the lower member 20 A steel beam 100;
And a concrete (C) cast into the steel beam (100) and cemented and integrated with the steel beam (100) integrally.

The method according to claim 1,
A concrete flow hole 40 is formed in the lower plate 13 of the upper member 10, the upper horizontal plate 23 and the lower reinforcing plate 30 of the lower member 20 to be separately drilled between bolt fastening holes for bolt connection And the lower reinforcing plate is further formed with a lower reinforcing plate.

The method according to claim 1,
The spacing between the pair of upper members 10 and 10 is set so as to connect the side plates 12 of the pair of upper members 10 and 10 at regular intervals along the longitudinal direction of the steel beam 100 And a width restricting member (50) for preventing the reinforcing member from spreading.

The method according to claim 1,
Wherein the lower reinforcing plate (30) is formed with a bent portion (33) that forms a corrugated shape by being bent at a central portion in the width direction in a predetermined cross sectional shape.

The method according to claim 1 or 4,
Wherein the lower reinforcing plate (30) has a front reinforcing plate (32) formed on the upper and lower surfaces at regular intervals, the reinforcing plate (32) being formed of one of a stud, an angle and a plate.

The method according to claim 1,
A stud bolt (60) is welded and fixed to the upper plate (11) of the pair of upper members (10, 10) with a predetermined interval along the longitudinal direction of the steel beam (100) so as to protrude upward. Hybrid composites with reinforcing plates.

The method according to claim 1,
Wherein the lower reinforcing plate (30) is formed such that both ends thereof are protruded by a predetermined length from the outer surface of the side plate (12) of the upper member (10).

The method of claim 7,
Wherein a vertical bolt (221) is welded and fixed to the vertical plates (12, 12) of the upper member (20) at regular intervals along the longitudinal direction of the steel beam (100) .

The method according to claim 1,
And a lower end of the side plate 72 is connected to the upper plate 71 so as to face the horizontal plate 71. The upper plate 71 is connected to the upper plate 71, (70, 70) coupled to the top plate (11) of the main body (10) and spaced apart in parallel so that their cross sections are symmetrical,
The pair of dancer adjusting members 70 and 70 are provided so as to connect the horizontal plates 71 of the pair of dancer adjusting members 70 and 70 at regular intervals along the longitudinal direction of the steel beam 100, Further comprising a width fixing member (90) for preventing a gap from spreading.