KR101747104B1 - Long-span u-type composite beam for slim floor and the construction method therefor - Google Patents

Abstract

A span span height reduction type U-shaped composite beam useful for a work parking lot and a construction method thereof are disclosed in which an intermediate column can be installed according to a long span in a construction in which a composite beam is connected between column structures, U-shaped bent plate formed with span floor height reduction type U-shaped composite viewing horizontal extension part on the upper side; A channel member formed on an upper surface of the horizontal extending portion, the decking hook having a reinforcing bar hole; A camber installed to fix a lower truss reinforcing bar by a reinforcing bar truss fixture on the upper surface of a lower plate of a U-shaped bent plate, and a camber installed in the longitudinal direction to transmit an acting load from the center of the composite to the column structure via both ends A reinforcing truss;

Description

TECHNICAL FIELD [0001] The present invention relates to a long span floor-height reduction type U-shaped composite beam and a method of constructing the same. BACKGROUND OF THE INVENTION 1. Field of the Invention [0001]

The present invention relates to a long span flooring height reduction type U-shaped composite beam and a construction method thereof. More specifically, it is possible to install an intermediate column according to a long span in a construction in which a composite beam is connected between columnar structures, and to reduce a floor height, thereby to provide a long span height reduction type U-shaped composite beam useful for a work parking lot and a construction method thereof .

Composite composite beams used for long span implementation can be classified into embedded type composite beams completely enclosed by concrete and exposed composite beams maximizing moment performance by applying composite slabs on top of steel beams.

In the case of the above-mentioned embedded type composite beam, if the specified coating thickness is satisfied, the complete composite behavior is obtained even if there is no separate shear connection material. However, since the construction is disadvantageous in terms of workability and economy,

In addition, the concrete type slab is installed on the upper part of the steel beam to maximize the moment performance, and it can be used in a relatively long span with light load and high rigidity.

However, since the slab is installed on the upper part of the steel beam, the stratification is increased and there are problems such as refractory coating, compression flange on the steel beam and local buckling of the web.

Conventionally, in the case of construction of a parking lot for a workpiece, for example, a long span structure technique of reducing the floor height (2.65 m or less) is required in order to secure the parking space of the third floor and the fourth floor. The parking part is designed to be 550 mm, There is a limit to doing so.

That is, as shown in FIG. 1A, an example in which the tension between the ends of the steel beam 50 is subjected to a small cross-sectional process while the tension member for introducing the prestress is used at the intermediate portion is disclosed. However, , It is known that it is difficult to secure the usability due to the deterioration of the vibration performance at the time of moving the vehicle.

Further, as shown in FIG. 1B, a slim floor method comprising an asymmetric steel beam having a wider width of the lower flange of the steel beam 31 is applied to reduce the height of the steel beam, or a box- (60) is also used.

However, there is a problem in that it is not suitable to apply to the construction of a parking lot because there is a problem of refractory coating, difficulty in securing rigidity, and difficulty in manufacturing.

1C is a construction cross-sectional view of a prior art height reduction composite type composite beam.

A side vertical portion 12 vertically bent upward from one end of the bottom portion 11 and a horizontal portion 12 horizontally bent at the upper end of the side vertical portion 12, A first lower molded steel plate 10a formed to have a first central vertical portion 14 vertically bent upward from the other side end of the bottom portion 11;

The first lower molded steel plate 10 has a symmetrical or asymmetric sectional shape with respect to the first lower molded steel plate 10 and is disposed symmetrically with respect to the first central vertical portion 14 of the first lower molded steel plate 10, A second lower molded steel plate 10b joined to the first lower molded steel plate 10b;

And a second central vertical portion 22 bent downward from the one end of the upper surface portion 21 vertically downwardly so as to have a first central portion 22 of the first lower molded steel plate 10a, A first upper molded steel plate 20a joined to one side of the upper portion of the vertical portion 14;

The first upper molded steel plate 20a is symmetrically arranged with respect to the second central vertical portion 22 of the first upper molded steel plate 20a and has a symmetrical or asymmetric sectional shape with respect to the first upper molded steel plate 20a, A second upper molded steel plate 20b joined to the other upper side of the first central vertical portion 14 of the steel plate 10b;

The deck plate 30 and the slab concrete 40 placed inside the composite beam.

In other words, although it is possible to easily produce a composite beam using a plurality of molded steel plates, the first central vertical portion 14 and the second central vertical portion 22 are insufficient to contribute to the improvement of the whip stiffness of the composite beam, The support of the deck plate 30 caused by the deck plate 30 may become unstable, which is effective for reducing the height of the deck plate 30. However,

FIG. 1D shows a conventional reinforced concrete truss-integrated deck plate 20. FIG.

That is, a trapezoidal cross section having one side as a whole is constituted by the upper plate 11, the side plate 12 bent downwardly at both ends in the width direction of the upper plate, the lower plate 13 bent horizontally at the end in the width direction of each side plate ) Comprising: a frame-shaped deck plate (10) in which a unit portion consisting of an upper plate and a side plate, and a valley portion formed by a lower plate and a side plate are formed continuously; And a pair of lower reinforcing bars provided on the lower part of the upper reinforcing bars and spaced apart from each other below the upper reinforcing bars and a reinforcing bar provided along the longitudinal direction of the upper reinforcing bars and the lower reinforcing bars, And a plurality of reinforcing trusses (20) composed of a pair of web reinforcing bars.

However, since the deck plate 20 is a bottom plate member, the deck plate 20 can not be used as a beam member capable of effectively resisting the bending moment. The reinforcing truss 20 is also used for reinforcing the bottom plate. It is not an optimized arrangement type, but it has a lot of bent parts for top plate, bottom plate, and side plate for securing rigidity, so it is difficult to manufacture. Becomes difficult.

1e, a lattice-type composite beam 60 of a height reduction type has also been introduced (Dissertation: Evaluation of bending and shearing performance of a lattice-type composite beam of height reduction type, 2014.02) The lattice reinforcement is used. However, since it is a substitute for inner reinforcement, it is ineffective in the structural load action, and thus it is limited to be used as a composite beam for a slim floor.

Korean Patent No. 10-1356245 (entitled "3-story, 4-story concrete slab long span workshop parking lot with a floor height reduction type", publication date: November 13, 2008) Korean Patent No. 10-0870068 (Name of the invention: Steel-concrete composite beam for slab height reduction and steel-plate for slab assembly, publication date: Jan. 29, 2014)

Korea Master Thesis (Title: Evaluation of Bending and Shear Capacity of Laminated Type Composite Beams in Flyover Type, Publication Date 2014.02)

Accordingly, the present invention provides a composite bow that is integrated between the bottom plate and the bottom plate when the bottom plate concrete is poured, Span-span floor-height reduction type U-shaped composite beams that can secure the workability and can secure the strength and rigidity of the composite beams while being easy to produce and have a small weight, and to provide a method of constructing the same.

In order to accomplish the above object, the present invention provides a long span layer height reduction type U-

A U-shaped bent plate having both horizontal extension portions formed on its upper end; A channel member formed on an upper surface of the horizontal extending portion, the decking hook having a reinforcing bar hole; A camber installed to fix a lower truss reinforcing bar by a reinforcing bar truss fixture on the upper surface of a lower plate of a U-shaped bent plate, and a camber installed in the longitudinal direction to transmit an acting load from the center of the composite to the column structure via both ends The slab reinforcing bar is connected to the slab reinforcing bar through a reinforcing bar hole of the deck stretching part,
The reinforcing bar truss fixture is for fixing the lower truss reinforcing bars to the lower plate of the U-shaped bent plate. The reinforcing truss reinforcing bar is a reinforcing bar truss which allows the lower truss reinforcing bars to be inserted downward between the right and left triangular bent plates, A reinforcing bar truss fastener can be used which allows the lower truss reinforcing bars to be inserted downwardly between the fixing brackets or between the rectangular bent plates facing each other from both horizontal bases.

According to an aspect of the present invention, there is provided a long span floor height reduction type U-

(a) after arranging the column structures apart from each other, arranging a long span layer height reduction U-shaped composite beam between the columnar structures so that the end face is strong on the side of the column structure; (b) installing a deck plate so that the end portion can be inserted into the deck hook portion of the long span floor height reduction type U-shaped composite bow; (c) disposing a slab lower reinforcing steel bar and a slab upper reinforcing steel bar while passing through the deck plate; And (d) placing the slab concrete in the U-shaped bent plate of the upper deck plate and the U-shaped composite plate of the long span height reduction type to embed the reinforcing truss into which the camber is introduced, thereby constructing the slab,

The long span height reduction type U-shaped composite view of the step (a) is formed such that a lower truss reinforcing bar is fixed by a reinforcing truss fastener on the upper surface of a lower plate of a U-shaped bent plate and a camber is introduced in the longitudinal direction, And a reinforcing bar truss incorporating a camber installed to be transmitted to the pillar structure via both ends thereof.

According to the present invention, a long span (not less than 16 m) in a parking lot with a limited building height (for example, 8 m or less) The construction method can be provided.

In addition, since the truss reinforcement with the camber is installed on the wide bending type thin plate, it is very easy to install because it is very small in weight, and it is advantageous in transmitting the column structure of the working load and has excellent workability.

Further, in order to support the deck for slab from both sides, a channel member is formed on the wide bending type thin plate and the end of the deck is installed so as to secure the safety of the slab construction.

Also, since the slab reinforcing bars penetrate through the channel members to cross the truss reinforcing bars, it is possible to reinforce the joints of the composite beams and the slabs, thereby ensuring the integrity of each other.

In addition, since the reinforcing truss is integrated into the concrete in the inside, it is not necessary to use any other shear connection material, and the reinforcing truss can increase the rigidity and secure the deflection and vibration performance.

In addition, since the construction can be easily performed with a simple structure, rapid construction can be performed. In particular, it is possible to provide a composite beam that is very advantageous for a parking lot of a workpiece having a limited building height (for example, 8 m or less).

FIG. 1A is a construction sectional view and a perspective view of a beam used in construction of a conventional work parking lot,
FIG. 1B is a construction sectional view of a beam used for constructing a conventional floor height reduction type parking lot,
1C is a construction cross-sectional view of a conventional floor height reduction type composite,
1D is a cross-sectional view of a conventional reinforced concrete truss-integrated deck plate and a reinforcing truss perspective view,
Fig. 1E is a view showing a construction example of a conventional lattice-saving composite lattice-type composite sheet,
FIG. 2A is a perspective view showing the configuration of the long span floor height reduction type U-
FIG. 2B is an illustration of a truss reinforcement and a reinforcing truss fastener incorporating the deck girder portion, the camber,
Figs. 3A and 3B are construction cross-sectional views of a long span floor height reduction type U-shaped composite beam and a slab of the present invention,
FIGS. 4A and 4B are flowcharts of a long span floor height reduction type U-shaped composite spring construction method of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, which will be readily apparent to those skilled in the art. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and similar parts are denoted by like reference characters throughout the specification.

Throughout the specification, when an element is referred to as "comprising ", it means that it can include other elements as well, without excluding other elements unless specifically stated otherwise.

[Span Span Height-saving U-shaped Composite Beam (100)]

FIG. 2B is an exploded perspective view of the deck gripper 120 of the present invention, the reinforcing bar truss 130 and the reinforcing bar truss fixture 140 to which the camber is inserted, FIG. Fig.

The long span floor height reduction type U-shaped composite beam 100 includes a U-shaped bent plate 110, a deck hook 120, a reinforcing truss 130 with a camber introduced therein, and a reinforcing bar truss fixture 140.

The U-shaped bent plate 110 is formed by a U-shaped cross-section including the both side plates 111 and the lower plate 112 at the lower ends of both side plates. The upper ends of the U- And the horizontally extending portion 113 is formed so that the needle portion 120 is supported on the upper surface.

At this time, the width of the lower plate 112 is set such that a reinforcing truss 130 having a camber introduced thereinto is fixedly installed at the center of the upper surface, and the slab concrete 320 is filled on both sides of the reinforcing truss 130 into which the camber is introduced It is ensured that there is a certain level and it is decided to be below the absolute level.

For example, the width of the lower plate is determined to be less than 350 mm since the absolute height required for constructing the parking lot of a work is determined. In the present invention, the width of the lower plate is sufficiently secured to secure the width by synthesis with the slab concrete 320, (110).

The end face of the U-shaped bent plate 110 is tightly fixed to the column structure 400 and the slab concrete 320 is installed in the U-shaped bent plate 110 to be integrated with the concrete. The shear connector may not be used, and this will be achieved by the reinforcing truss 130 into which the camber will be introduced.

The deck hooking part 120 is provided as a channel member on the upper surface of the horizontal extending part 113 of the U-shaped bent plate 110 in order to load the bottom end of the deck plate 200 as the name implies.

That is, the horizontal extending portion 113 of the U-shaped bent plate 110 is structurally extended upward, and when the end of the deck plate 200 is laid on the horizontal extending portion 113, Since the deck plate 200 can be deformed by a load, it is possible to easily install the deck plate 200 while securing the workability in a manner that the deck plate 200 is fitted with the deck plate 200 together with the deck-

The deck hook part 120 as a channel member has a reinforcing bar hole 121 and a function of allowing the slab reinforcement 310 installed on the deck plate 200 to pass therethrough.

Since the reinforcing bar hole 121 is made to communicate with the slab concrete 320, it also has a filling function.

2B, the decking hook 120, which is a channel member, includes a U-shaped channel member 120a, a U-shaped channel member 120b, a deformed channel member 120c having a horizontal portion formed on a vertical portion, It is possible to use a structure in which a plurality of reinforcing bar holes 121 are formed so as to secure a space for inserting the deck plate 200 and that the slab reinforcement 310 penetrates the reinforcing bar hole 121 have.

The reinforcing truss 130 having the camber inserted therein is made to have both end portions fixed to the center of the lower plate 112 of the U-shaped bent plate 110 and having a constant curve in the longitudinal direction.

That is, the reinforcing truss 130 into which the camber is introduced includes a lower truss reinforcing bar 131, an upper truss reinforcing bar 132, a lower truss reinforcing bar 131 and a lower truss reinforcing bar 132, 133, and the cross-sectional shape may be formed by a triangular, rectangular cross-section, or the like.

As shown in FIG. 2B, the reinforcing truss 130 having the camber introduced therein introduces the pre-camber so as to be upwardly curved in the longitudinal direction. The acting load is applied to the long- The load is distributed to the columnar structure 400 through the U-shaped composite beam 100, so that the cross-sectional size of the long span height reduction type U-shaped composite beam 100 can be optimized.

The lower truss reinforcement 131 is fixed to the lower plate 112 of the U-shaped bent plate 110. However, when the lower truss reinforcement 131 is welded, the lower plate 112 may be a thin plate.

Therefore, the present invention utilizes the reinforcing bar truss fixture 140 so that the reinforcing bar truss 130 having the camber introduced therein can be simply fixed to the lower plate 112 of the U-shaped bent plate 110.

The reinforcing bar truss fixture 140 is for fixing the lower truss reinforcement 131 to the lower plate 112 of the U-shaped bent plate 110. As shown in FIG. 2B,

First, a reinforcing bar truss fixture 140a for inserting the lower truss reinforcement 131 downwardly between the horizontal bases 141 and the triangular bent plates 142 facing each other

Second, a reinforcing bar truss fixture 140b for inserting the lower truss reinforcement 131 downwardly between the horizontal bases 141 and the rectangular bent plates 143 facing each other,

Third, a reinforcing bar truss fixture 140c which is mounted on the upper surface of the inverted triangular bent plate 144 at the upper center of one of the horizontal bases 141 so that the lower truss reinforcing bar 131 can be fixedly installed by welding or the like,

Fourth, one end of the horizontal base 141 is bent so that it is bent upward toward the center of the horizontal base, and the lower truss reinforcement 131 is inserted below the horizontal bent plates 145, It can be seen that the reinforcing bar truss fastener 140d can be used.

When the reinforcing bar truss 130 having the camber introduced thereinto is fixed to the lower plate 112 of the U-shaped bent plate 110 by using the reinforcing bar truss fixture 140, it is combined with the slab concrete 320, The U-shaped composite beam 100 is provided.

Accordingly, the weight of the composite formed of the reinforcing truss 130 and the U-shaped bent plate 110 into which the camber is introduced can be minimized, and both ends are fixed to the pillar structure 400, The reinforced truss 130 is constructed by the slab concrete 320 so that the load can be supported at an optimal cross-section, thereby making it possible to make a long span. Since no separate shear connection material is used, .

[Long span height reduction type U-shaped composite beam 100 and slab 300]

3A and 3B are construction cross-sectional views of a long span floor height reduction type U-shaped composite beam 100 and a slab 300 of the present invention.

The difference between FIGS. 3A and 3B is a difference in sectional height of the reinforcing truss 130 in which the camber is introduced, which is a construction structure that can overcome the absolute height limit of the parking lot of the workpiece.

First, referring to FIG. 3A,

A reinforcing bar truss 130 having a camber introduced into a center portion of a lower plate of a U-shaped bent plate 110 of a long span height reduction type U-shaped composite beam 100 is fixed to the reinforcing bar truss 130, It can be seen that it is possible to contribute to the improvement of the shear adhesion of the bending plate 110, and it becomes possible to effectively support dispersion of the working load.

The deck plate 200 is inserted into the inner space of the deck gripping part 120 to be installed on the U-shaped bent plate 110, It can be seen that a more stable construction is possible on the upper surface.

The slab concrete 320 is placed inside the U-shaped bent plate 110 so that the reinforcing truss 130 into which the camber is introduced is buried and the upper portion of the deck plate 200 is formed to have a constant thickness.

The slab lower reinforcing steel bar 311 and the upper slab reinforcing steel bar 312 are passed through the reinforcing steel pipe hole 121 of the deck hooking part 120 and are laid across the upper portion of the U- As shown in FIG.

The slab lower reinforcing bar 311 can be brought into contact with or bonded to the upper surface of the reinforcing truss 130 into which the camber is introduced so that the long span floor lowering type U-shaped composite ball 100 and the slab 300 are structurally completely It can be seen that they are integrated and synthesized.

The work of laying the slab lower reinforcing steel bar 311 and the upper slab reinforcing steel bar 312 also passes through the reinforcing steel pipe hole 121 of the deck hooking part 120,

With this complete integration, the long span floor-height reduction type U-shaped composite beam 100 can provide a parking lot of a workpiece capable of vibration and noise reduction while making a long span.

In addition, it becomes possible to construct a parking lot of a working structure capable of ensuring workability and economical efficiency while sufficiently securing the absolute dancing (350 mm) of the long span flooring reduction type U-shaped composite beam 100.

Next, referring to FIG. 3B,

A reinforcing truss 130 in which a camber is introduced is fixedly installed at a center portion of a lower plate of a U-shaped bent plate 110 of a long span, height-reduced U-shaped composite beam 100. The reinforcing bars 130 and U Type bending plate 110. This is the same as the fact that it is possible to effectively distribute and support the working load.

The deck plate 200 is inserted into the inner space of the deck gripping part 120 and installed on the upper surface of the U-shaped bent plate 110 It is possible to make a more stable construction on the upper surface.

The slab concrete C is placed inside the U-shaped bent plate 110 so that the reinforcing truss 130 having the camber inserted therein is formed to have a constant thickness over the deck plate 200.

At this time, the upper end of the reinforcing truss 130 into which the camber is inserted has a section height to the upper surface of the deck hooking portion 120, so that the flexural rigidity of the long span height reduction type U- , And the slim floor (Slim Floor) method.

This shows that the present invention can easily overcome the absolute dancing limit of the long span floor height reduction type U-shaped synthetic bow 100 by adjusting the sectional height of the reinforcing truss 130 in which the camber is introduced.

3A, the slab lower reinforcing steel bar 311 passes through the center of the reinforcing bar truss 130 into which the camber is introduced, and the slab upper reinforcing steel bar 312 is connected to the reinforcing bar truss 130, So that it is embedded in the slab concrete 320.

Also, since the work of laying the slab lower reinforcing steel bar 311 and the upper slab reinforcing steel bar 312 passes through the reinforcing bar hole 121 of the deck hook part 120 and the reinforcing bar truss 130 into which the camber is introduced There is little interference with the laying work, and the workability can be sufficiently secured.

With such a perfect integration, the long span floor-height reduction type U-shaped composite beam 100 can provide a parking lot of a workpiece capable of vibration and noise reduction while making a long span.

As a result, it is very advantageous to construct a parking lot of a working structure capable of ensuring workability and economical efficiency while sufficiently securing the absolute dancing (350 mm) of the long span floor-height reduction type U-

[Long span height reduction type U-shaped composite beam construction method]

Figs. 4A and 4B show a flowchart of a long span floor height reduction type U-shaped composite spring construction method. This is based on the construction of the parking lot of the work structure.

First, as shown in FIG. 4A, the column structures 400 are spaced apart from each other. The pillar structure 400 may have a steel structure of about three stories in height, and the length of one span may be determined in consideration of the extension length of the long span floor height reduction type U-shaped composite beam of the present invention.

Spacer span height reduction type U-shaped composite beams 100 according to the above-described FIG. 3A or 3B are installed between the columnar structures 400. This can be accomplished by making the end faces strong on the side of the columnar structure.

The long-span, thick-walled U-shaped composite beam 100 includes the U-shaped bent plate 110, the deck hooked portion 120, the reinforced bar truss 130 with the camber introduced therein, and the reinforced bar truss fastener 140 .

Next, as shown in FIG. 4B, the deck plate 200 is installed so that the end portion can be inserted into the deck hook portion 120 of the long span floor height reduction type U- Such a deck plate may have various cross-sectional shapes.

The slab lower reinforcing steel bar 311 and the slab upper reinforcing steel bar 312 are subjected to the laying work of the slab lower reinforcing steel bar 311 and the slab upper reinforcing steel bar 312 while passing through the deck plate 200. The slab lower reinforcing steel bar 311, As shown in FIGS. 3A and 3B.

Next, the slab concrete 320 is laid in the U-shaped bent plate 110 of the upper deck plate and the long span floor-lowering type U-shaped composite beam 100 so that the reinforcing truss 130 into which the camber is introduced is embedded, It is possible to construct the parking lot of the final working structure by overlaying the floor 300, thereby overcoming the limitation of the floor height due to the long span.

It will be understood by those skilled in the art that the foregoing description of the present invention is for illustrative purposes only and that those of ordinary skill in the art can readily understand that various changes and modifications may be made without departing from the spirit or essential characteristics of the present invention. will be. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. For example, each component described as a single entity may be distributed and implemented, and components described as being distributed may also be implemented in a combined form.

The scope of the present invention is defined by the appended claims rather than the detailed description and all changes or modifications derived from the meaning and scope of the claims and their equivalents are to be construed as being included within the scope of the present invention do.

100: long-span beam
110: U-shaped bent plate 111: Both side plates
112: bottom plate 113: horizontal extension part
120: Depth of deck girder 121: Reinforcement hole
130: Rebar truss 131 incorporating a camber 131: Lower truss reinforcement
132: upper truss reinforcement 133: lattice reinforcement
140: Reinforcing truss fixture 200: Deck plate
300: slab 310: slab reinforcement
311: Slab bottom rebar 312: Slab top rebar
320: slab concrete 400: pillar structure

Claims (11)

A U-shaped bent plate 110 having both horizontal extending portions 113 formed on its upper end;
A deck hanging part 120 having a reinforcing bar hole 121 formed therein as a channel member formed on an upper surface of the horizontal extending part 113; And
The lower truss reinforcement 131 is fixed to the upper surface of the lower plate 112 of the U-shaped bent plate 110 by the reinforcing bar truss fixture 140 and the camber is introduced in the longitudinal direction, And a reinforcing bar truss 130 into which a camber installed to be transmitted to the pillar structure is introduced,
The slab reinforcement 310 can be penetrated through the reinforcement rope 121 of the deck gripper portion 120 while the slab concrete 320 is communicated with the reinforcement rope 121,
The reinforcing bar truss fixture 140 is for fixing the lower truss reinforcement 131 to the lower plate 112 of the U-shaped bent plate 110. The reinforcing bar truss fixture 140 includes a pair of left and right triangular bent plates 141, A lower truss fixture 140a for allowing the lower truss reinforcement 131 to be inserted downward between the lower horizontal truss 142 and the upper truss fixture 140b, And a reinforcing bar truss fixture (140b) for allowing the reinforcing bars (131) to be inserted and installed. The method according to claim 1,
The U-shaped bent plate 110 is formed to have a U-shaped cross section including both the side plates 111 and the lower plate 112 at the lower ends of both side plates, and the upper end of the both side plates 111 is formed with a deck- So that it is formed as a horizontally extending portion 113,
The reinforcing truss 130 in which the camber of the lower plate 112 is inserted is fixed at the center of the upper surface and the wide U-shaped bent portion 130 is formed so that the slab concrete 320 can be filled on both sides of the reinforcing truss 130, Span span height reduction type U - shaped composite beam to be formed by plate. The method according to claim 1,
The deck hook part 120 is formed as a channel member with a reinforcing bar hole 121 formed therein so that the slab reinforcing bar 310 installed on the deck plate 200 can be penetrated to be inserted, Long span, thick and compact U-shaped composite beams. The method of claim 3,
The deck hook part 120 is formed by a U-shaped channel member 120a, a U-shaped channel member 120b or a deformed U-shaped channel member 120b having a horizontal part on the vertical part and a vertical part on the vertical part to secure a space in which the deck plate 200 is inserted laterally. Span span floor height reduction type U-shaped composite beams enabling use of the channel member (120c). The method according to claim 1,
The reinforcing bar truss 130 into which the camber is introduced
The front camber is introduced so as to be upwardly curved in the longitudinal direction so that the load is dispersed to the column structure 400 through the long span floor reduction type U-shaped composite beam 100 through the reinforcing truss in which the camber is introduced, However,
And a lattice reinforcing bar 133 connecting the lower truss reinforcement 131 and the upper truss reinforcement 132 and the lower truss reinforcement 131 and the upper truss reinforcing rein 132 upward and downward from each other, Span Span Height - saving U - shaped Composite Beam. delete A U-shaped bent plate 110 having both horizontal extending portions 113 formed on its upper end; A deck hanging part 120 having a reinforcing bar hole 121 formed therein as a channel member formed on an upper surface of the horizontal extending part 113; And
The lower truss reinforcement 131 is fixed to the upper surface of the lower plate 112 of the U-shaped bent plate 110 by the reinforcing bar truss fixture 140 and the camber is introduced in the longitudinal direction, The slab reinforcing bar 310 is connected to the slab concrete 320 through the reinforcing bar hole 121 of the deck hooking part 120. The slab reinforcing bar 310 is connected to the slab reinforcement 310, So that it can be laid through,
The reinforcing bar truss fixture 140 is for fixing the lower truss reinforcement 131 to the lower plate 112 of the U-shaped bent plate 110,
A reinforcing bar truss fixture 140c or a reinforcing bar truss fixture 140c which can be fixedly installed on the upper surface of the inverted truss flexion plate 144 at the upper center of one horizontal base 141 by welding or the like,
A reinforcing truss (not shown) for bending the both ends of one horizontal base 141 to bend upwardly toward the center of the horizontal base, and for inserting the lower truss reinforcement 131 below the horizontal bent plates 145, A span span floor height reduction type U-shaped composite spring capable of using a fixture (140d). The method according to claim 1,
The slab reinforcement 310 is
The slab reinforcing bars 311 and the slab reinforcing reinforcing bars 312 are arranged so as to penetrate the reinforcing bars 121 of the deck hooks 120 and traverse the upper portion of the U- 0.0 > 320) < / RTI > 9. The method of claim 8,
And the slab reinforcement (310) is extended onto the deck plate in such a manner that the slab reinforcement (310) abuts on or binds to the upper surface of the reinforcing truss (130) into which the camber is introduced. (a) The columnar structures 400 are spaced apart from each other, and then the long span height reduction type U-shaped composite beam 100 of the first clause 1 is installed between the columnar structures 400. When the end surface is formed to be strong on the side of the columnar structure ;
(b) installing a deck plate (200) so that an end portion of the deck plate (200) can be inserted into the deck hook portion (120) of the long span floor height reduction type U-
(c) disposing the slab lower reinforcing steel bar 311 and the slab upper reinforcing steel bar 312 while passing through the deck plate 200; And
(d) Placing the slab concrete 320 inside the U-shaped bent plate 110 of the upper span and lower span type U-shaped composite beam 100 at the upper portion of the deck plate 200, Thereby constructing the slab (300)
The long span floor height reduction type U-shaped composite beam 100 of the step (a) is constructed such that the lower truss reinforcing bars 131 are fixed to the upper surface of the lower plate 111 of the U-shaped bent plate 110 by the reinforcing bar truss fixture 140 And a reinforcing truss (130) into which a camber is introduced such that a working load is introduced from the center of the composite beam through both ends to the column structure by introducing a camber in the longitudinal direction, and a long span floor height reduction type U- . 11. The method of claim 10,
And the slab 300 is constructed by the step (d) so that the parking lot of the final working structure can be constructed.

Images