KR20080090968A - Composite truss deck - Google Patents

Abstract

A composite truss deck is provided to increasing vertical strength of the truss deck by bending horizontal reinforcing bars vertically to support vertical reinforcing bars. A composite truss deck comprises a bent reinforcing bar assembly(10) and a steel sheet(20). The bent reinforcing bar assembly includes vertical reinforcing bars(11) and a horizontal reinforcing bars(12). The horizontal reinforcing bars are fixed to the vertical reinforcing bars at regular intervals crosswise. The bent reinforcing bar assembly is welded to the steel sheet. The horizontal reinforcing bar is a pair of reinforcing bars, and each reinforcing bar protrudes upwards and meets each other at the top to support the vertical reinforcing bar.

Description

Composite truss-type bending rebar assembly deck with truss-like arrangement of transverse reinforcing bars and easy-to-close coupling structure {Composite Truss Deck}

The present invention relates to a composite truss-type bending reinforcing bar assembly deck for constructing a slab slab, and more specifically, by installing a bending reinforcing bar assembly consisting of longitudinal bars arranged side by side and transverse reinforcing bars bent on a steel plate In forming the deck slab construction deck, it is possible to easily secure the concrete cover thickness required by the design standards for the longitudinal reinforcement, and the transverse rebars disposed across the longitudinal rebars are also inclined in the longitudinal direction. The present invention relates to a bent reinforcing bar assembly deck having a complex truss structure that allows the truss behavior to be continuously maintained in a state so as to exert the truss behavior with respect to the longitudinal stress and to facilitate the assembly and sealing between the decks.

As a deck that can easily build floor slabs in a non-seamless manner when constructing a building, a reinforcing bar assembly deck with a reinforcing bar assembly made of mesh wires bent over a steel plate is disclosed in Patent Application No. 1996-78471. Was proposed. FIG. 1A is a schematic perspective view of a conventional rebar assembly 100, and FIG. 1B is a lateral cross-sectional view of the rebar assembly 100 of FIG. 1A installed on a steel plate 200.

As shown in the figure, the steel plate 200 on which the reinforcing bar assembly 100 is placed, the connection bar coupling portion that is bent inward to be coupled to insert the connection bar for hanging the facilities such as air ducts in the lower portion ( 201 is formed, and the reinforcing bar assembly 100 is formed by performing spot welding while the main bar of the reinforcing bar assembly 100, that is, the longitudinal reinforcing bar 101 is directly placed on the connecting bar coupling unit 201. It has a structure fixed to the 200.

By the way, in the conventional reinforcing bar assembly deck, the transverse bars arranged vertically with respect to the longitudinal bars are intermittently arranged in the longitudinal direction, so that the transverse bars exhibit the longitudinal truss behavior when stress is applied in the longitudinal direction. There is a limit to not being able to.

On the other hand, in the floor slab, the main reinforcing bars, that is, the longitudinal reinforcement 101 should be installed to have a constant concrete coating thickness prescribed in the design standards. However, in the conventional case, since the longitudinal reinforcement 101 is placed so as to contact the direct connection bar coupling portion 201, there is a problem in that it is impossible to secure the concrete coating thickness determined in the design criteria.

In addition, the conventional bending wire mesh deck consisting of the steel plate 200 and the reinforcing bar assembly 100 as described above is generally made to have a predetermined width in the transverse direction to be assembled next to each other to form a floor slab of the required width. . In the conventional deck had a configuration of assembling the deck in the transverse direction by simply using the configuration to install the steel plate 200 to overlap each other up and down, with such a configuration, the transverse coupling of the deck was not firm and overlapped steel plate There is a problem that the concrete oozes out of the gap between the (200).

The present invention has been developed to solve the problems of the prior art as described above, a steel bar assembly consisting of a plurality of longitudinal rebars arranged side by side, and a transverse reinforcement bent and coupled to the longitudinal rebars on the steel sheet When installing the deck to form a full truss behavior against the longitudinally acting stress on the transverse reinforcement, it is possible to easily secure the required concrete coating thickness for the longitudinal reinforcement It is an object of the present invention to provide a new reinforcing bar assembly deck that can enhance the rigidity of the deck and reduce the deflection, and to facilitate the assembly and sealing between the decks.

In order to achieve the above object, in the present invention, a composite truss having a structure in which a bending rebar assembly composed of longitudinal reinforcing bars and transverse rebars arranged side by side across the longitudinal reinforcing bars is installed on a steel plate. As the reinforcing bar assembly deck (1), the transverse rebars are paired in two pairs, each of which is inclined in the longitudinal direction so that the protruding portions of the transverse rebars which are bent and protruded upwards face each other at one point of the longitudinal rebars. Provided is a composite truss reinforcing bar assembly deck characterized by having a structure in which a pair of transverse rebars are connected to each other in the longitudinal direction.

In addition, in the composite truss-type reinforcing bar assembly deck, one side of the steel plate in the transverse direction is formed bent insertion portion bent at a right angle with the bottom surface of the steel plate; On the other side of the steel sheet in the transverse direction is formed a bending coupling portion that is bent at a right angle with the bottom surface of the steel plate; The upper end of the bent coupling portion is made of a bending fitting portion is folded back folded again; When the neighboring steel plates are coupled to each other, the steel plates are pressed down in a state where the bent coupling portion and the bending insertion portion of one side are in contact with each other so that the bending insertion portion is sandwiched between the bending coupling portion and the bending fitting portion. Steel plates may have a structure that is bonded to each other.

In addition, a filler for a closed chamber may be interposed between the bent coupling portion and the bent fitting portion and the bent insertion portion.

In addition, the transverse reinforcing bar, the portion in contact with the longitudinal reinforcing bars located below the bent, the transverse reinforcing portions in contact with the longitudinal reinforcement may be spaced apart from the steel plate.

In addition, the steel plate, at a predetermined interval in the transverse direction, may further include a bent portion formed long in the longitudinal direction.

In addition, the steel plate is folded to each other is formed in a plurality of folds spaced apart in the transverse direction in the vertical direction protruding upwardly; The bent rebar assembly is installed such that its transverse bars rest across the top of the fold; The spot where the transverse reinforcing bar is placed on the upper end of the fold part is spot welded so that the transverse reinforcing bar is fixed to the upper end of the fold part so that the bent rebar assembly may be integrally installed on the steel plate.

In addition, the longitudinal reinforcement is composed of two longitudinal rebars disposed at the bottom and one longitudinal rebar disposed at the top, the horizontal rebar is disposed across the two longitudinal rebars located at the bottom of the two longitudinal A plurality of longitudinal reinforcing bars may be integrated through horizontal reinforcing bars and vertical reinforcing bars by being coupled to a direction reinforcing bar and arranged so that the vertical reinforcing bars vertically coupled to the horizontal reinforcing bars are combined with the one longitudinal reinforcing bar disposed at the top. have.

As described above, in the composite truss deck 1 according to the present invention, in the conventional bending wire mesh deck, since the transverse rebars are arranged separated from each other in the longitudinal direction, when the stress acts on the deck in the longitudinal direction, The transverse reinforcement did not exhibit any truss behavior with respect to the longitudinal stress, but in the present invention, since the transverse reinforcement 12 is inclined in the longitudinal direction, when the stress acts in the longitudinal direction, the inclined direction is longitudinally inclined. The lost part becomes rigid. In other words, in the present invention, since the transverse reinforcing bars 12 are arranged to have a truss shape in the longitudinal direction as described above, the longitudinal truss behavior is also exhibited by the transverse reinforcing bars 12, and thus the bending wire mesh deck has Longitudinal stiffness is increased, and the deflection caused by the longitudinal stress is also significantly reduced.

In addition, in the present invention, the portion in contact with the longitudinal reinforcing bar 11 located at the lower side in the transverse reinforcing bar 12 is bent, the portion of the transverse reinforcing bar 12 in contact with the longitudinal reinforcing bar 11 is steel plate 20 By being spaced apart from the lateral stiffness, not only the lateral rigidity is strengthened, but also the cover thickness can be easily secured by the height of the bent portion with respect to the longitudinal reinforcing bar 11, which is the main bar, and the degree of bending can be adjusted. Concrete cover thickness of the reinforcing bar 11 also has the advantage that can be freely changed according to the design criteria.

In addition, in the present invention, the bent coupling portion 23, the bending fitting portion 24, and the bending insertion portion 22 are formed on the side of the steel plate 20 of the composite truss deck (1) which is adjacently coupled to each other in the lateral direction By pressing down the steel plate 20 on one side, the bending inserting portion 22 is automatically inserted between the bending fitting portion 24 and the bending coupling portion 23, thereby adjoining the steel sheet 20. This simple method has the advantage of being able to be firmly assembled to each other. In particular, when the bent insertion portion 22 is sandwiched between the bent fitting portion 24 and the bent coupling portion 23, their coupling is further closed by interposing the fillers 25a and 25b having elasticity therebetween. The effect is made.

In the above described the configuration and features of the present invention based on the embodiment according to the present invention, the present invention is not limited to this, it is possible to be freely modified according to the technical idea of the present invention.

Hereinafter, with reference to the accompanying drawings will be described the configuration and effect of the composite truss-type bending rebar assembly deck (hereinafter referred to as "composite truss deck") in accordance with an embodiment of the present invention.

In figure 2a a schematic perspective view of a composite truss deck 1 according to the invention is shown, and in figure 2b a lateral cross section in figure 2a is shown. 3A and 3B show enlarged views of the circle A portion and the circle B portion of FIG. 2B, respectively. 3c shows an enlarged view showing the transverse coupling structure of the steel plate of the composite truss deck 1 according to the present invention.

As shown, the composite truss deck 1 in the present invention comprises a steel plate 20 and a bending reinforcing bar assembly 10 installed thereon. The bending reinforcing bar assembly 10 has a plurality of parallel longitudinal reinforcing bars (11), and the middle is bent and transversely side by side across the longitudinal reinforcing bars (11) in an integrated state with the longitudinal reinforcing bars (11), respectively It is arranged in the direction and inclined also in the longitudinal direction is composed of transverse reinforcing bars 12 connected to each other.

In the embodiment shown in the figure, the longitudinal reinforcing bar 11 is a pair of three, two longitudinal reinforcing bars are arranged side by side in the longitudinal direction at regular intervals at the bottom, the other one longitudinal rebar It is located at the top with a predetermined height in the middle of the two longitudinal rebars.

The transverse reinforcing bars 12 are arranged across the longitudinal reinforcing bars 11 and are bent to cross both the two longitudinal reinforcing bars located below and the one of the longitudinal reinforcing bars located above. That is, the transverse reinforcing bars 12 are bent upwardly to form a protruding portion so that the horizontal portion is coupled with two longitudinal reinforcing bars located below, and the protruding portion is one longitudinal direction located at the upper portion. It has a structure that is combined with rebar. Particularly, in the present invention, the two transverse bars 12 adjacent to the transverse bars 12 are paired, and the protruding portions of the adjacent transverse bars 12 are inclined to face each other in the longitudinal direction. By simultaneously joining at one point of the upper longitudinal rebar, the transverse reinforcement 12 forms a continuous truss shape in the longitudinal direction. That is, in the present invention, the protruding portion of the transverse reinforcing bars 12, which are bent and protruded to engage with one longitudinal reinforcing bar located at the top, is not vertical but is inclined when viewed in the longitudinal direction and is combined with the longitudinal reinforcing bars. It is a continuous truss form.

In the conventional reinforcing bar assembly deck, since the transverse bars 12 are spaced apart from each other in the longitudinal direction, the transverse bars do not exhibit the truss behavior with respect to the longitudinal stress when the deck acts in the longitudinal direction. However, in the case of the present invention, since the transverse reinforcing bars 12 are inclined in the longitudinal direction, when the stress is applied in the longitudinal direction, the inclined portions in the longitudinal direction exhibit complete truss behavior. In other words, in the present invention, since the transverse reinforcing bars 12 are arranged to have a continuous shape in the longitudinal direction as described above, the longitudinal reinforcement is exerted also by the transverse reinforcing bars 12, so that the longitudinal of the reinforcing bar assembly deck Directional stiffness is increased, and the deflection caused when longitudinal stress is applied is also significantly reduced.

In addition, the transverse reinforcing bar 12 is bent in contact with the longitudinal reinforcing bar 11 located in the lower portion, the transverse reinforcing bar 12 portion in contact with the longitudinal reinforcing bar 11 is spaced apart from the steel plate do. That is, with the protruding portions of the transverse reinforcing bars 12 interposed therebetween, the transverse reinforcing bars 12 are bent once more at both lower ends, thereby increasing the stiffness in the transverse direction as well as the longitudinal reinforcing bars 11. It is possible to secure the thickness of the concrete coating. In addition, the bending degree of the transverse reinforcement 12 can be adjusted, so that the concrete coating thickness can be easily adjusted in a simple manner according to the design criteria.

In addition, in the present invention, the steel plate 20 has a predetermined interval in the transverse direction, and includes a bent portion 26 formed in the longitudinal direction to further increase the stiffness in the transverse direction.

On the other hand, the composite truss deck (1) is made to have a predetermined width in the transverse direction to form a floor slab of the required width by being assembled next to each other, in the present invention, the composite truss deck (1) is simple and robust in the transverse direction In order to prevent leakage, it should have the following structure so that it can be assembled and combined.

Specifically, as shown in FIGS. 3A and 3B, at one side of the steel plate 20 of the composite truss deck 1, the bent insertion part 22 is bent at a right angle with the bottom surface of the steel plate 20. Is formed. On the other side of the steel plate 20 in the lateral direction, a bending coupling part 23 is formed to be bent at a right angle with the bottom surface of the steel plate 20. The upper end of the bent coupling portion 23 is made of a bent fitting portion 24 that is folded again bent downward.

In such a configuration, when the neighboring steel plate 20 is coupled to each other, as shown in FIG. 3C, the one side of the bent coupling portion 23 and the bent insertion portion 22 are in contact with each other, and then the steel plate of one side ( 20 is pressed down, so that the bent insertion part 22 is automatically inserted between the bent fitting part 24 and the bent coupling part 23, so that the neighboring steel plate 20 is easy in a very simple way. Can be combined. In particular, the inner surface between the bent coupling portion 23 and the bent fitting portion 24 as shown in Figure 3a may be provided with a filler for sealing 25a having elasticity such as urethane, such as the bending coupling When the filler 25a is provided on the inner surface between the portion 23 and the bent fitting portion 24, the bent insertion portion 22 may be firmly coupled in a closed state when the bent insertion portion 22 is inserted therebetween. In the present invention, such a composite truss deck (1) through this configuration can be assembled easily and securely in the transverse direction, and so as not to leak.

4A and 4B show a variant embodiment of the present invention. In the present embodiment, the steel plate 20 has a folded portion 21 is formed to be folded to protrude vertically to each other as shown in Figure 4a. The folded portion 21 is formed long in the longitudinal direction, it is positioned at intervals in the transverse direction. The bending reinforcing bar assembly 10 in the present invention is placed on top of the folded portion 21 is coupled to the steel plate 20. That is, as shown in the figure, the transverse reinforcing bars 12 of the bent wire mesh 10 are laid across the upper end of the fold 21. By spot welding the point where the transverse reinforcing bars 12 are placed at the upper end of the folded part 21, the transverse reinforcing bars 12 are fixed to the upper part of the folding part 21, thereby bending the reinforcing bar assembly 10. It is integrally installed in the trial 20.

As described above, in the present invention, since the position at which the transverse reinforcing bars 12 are attached is present at the upper end of the folded portion 21 of the steel plate 20, even if a puncture occurs in the steel plate 20 by spot welding. The perforation position is the upper end of the folded portion 21 is embedded in the concrete has the effect that the leak problem caused by the perforation does not occur.

In addition, since the transverse reinforcing bars 12 are separated from the surface of the steel plate 20 by the height of the folding part 21, the concrete coating thickness is increased by the height of the folding part 21 with respect to the longitudinal reinforcing bar 11, which is the main bar. There is an effect that can be secured. In particular, since the height of the folded portion 21 can be arbitrarily changed by adjusting the overlapping length, the coating thickness of the longitudinal reinforcing bars 11 can also be freely changed according to the design criteria.

FIG. 5A is a cross-sectional view corresponding to FIG. 4B, showing a variant embodiment of the composite trust deck 1 having the fold 21 of FIG. 4. Specifically, in the embodiment illustrated in FIG. 4B, the longitudinal reinforcing bars 11 are located outside the transverse reinforcing bars 12. In the embodiment illustrated in FIG. 5A, the longitudinal reinforcing bars 11 are transverse reinforcing bars 12. In the present invention, the longitudinal reinforcing bars 11 may be disposed outside or inside the transverse reinforcing bars 12.

5B to 5D are views corresponding to FIGS. 3A to 3C, respectively, and are partially enlarged views of the composite truss deck 1 according to the modified embodiment of the present invention. In the embodiment shown in Figures 3a to 3c is provided with a filler 25a on the inner surface between the bending coupling portion 23 and the bending fitting portion 24, the embodiment shown in Figures 5b to 5d is the filler The deformed portion 25b was covered to the outside of the bent insertion portion 22.

Other configurations in the embodiments shown in FIGS. 5A to 5D are the same as the embodiments shown in FIGS. 4A and 4B and FIGS. 3A to 3C, and thus repeated descriptions thereof will be omitted. In the present invention, the position of the longitudinal reinforcing bar 11 is not limited thereto and may be variously modified.

After the bent rebar assembly 10 is installed on the steel plate 20 as described above to produce a composite truss deck (1), concrete is poured over the steel plate 20 to form a bottom plate slab.

6A and 6B show a schematic perspective view of a composite truss deck according to a variant embodiment of the invention, respectively, as shown in FIGS. 6A and 6B, in the composite truss deck 1 of the invention in its longitudinal direction. The vertical reinforcing bar 31 and the horizontal reinforcing bar 32 is installed at the end to enable the longitudinal reinforcing bars 11 to be integrated with each other. That is, a horizontal reinforcing bar 32 is disposed across two longitudinal reinforcing bars 11 located at a lower end thereof, and is coupled to the two longitudinal reinforcing bars 11, and is vertically coupled to the horizontal reinforcing bar 32. The reinforcing bar 31 is arranged to be coupled to one longitudinal reinforcing bar 11 disposed at the upper end so that the plurality of longitudinal reinforcing bars 11 are integrated through the horizontal bar 32 and the vertical bar 31.

As such, by integrating the ends of the longitudinal reinforcing bars 11 through the vertical reinforcing bars 31 and the horizontal reinforcing bars 32, the longitudinal rigidity of the deck may be further enhanced.

1 rebar assembly deck

10 rebar assembly

20 steel plates

Claims (3)

The bending reinforcing bar assembly 10 which consists of the longitudinal reinforcing bar 11 and the transverse rebar 12 arrange | positioned laterally side by side across the said longitudinal reinforcing bar 11 is a structure provided on the steel plate 20 Composite truss reinforcing bar assembly deck (1), The transverse reinforcement 12 is a pair of two, each of which is bent to protrude upward in the longitudinal direction so that the protruding portions of the transverse reinforcement (12) facing each other at one point of the longitudinal reinforcement (11) A composite truss reinforcing bar assembly deck characterized in that it has a structure in which a pair of transverse bars in the longitudinal direction are coupled to each other by being coupled. The method of claim 1, On one side of the steel plate 20 of the composite truss-type rebar assembly deck (1) in the transverse direction is formed a bent insertion portion 22 bent at a right angle with the bottom surface of the steel plate (20); On the other side of the steel plate 20 in the lateral direction, a bending coupling part 23 is formed to be bent at a right angle with the bottom surface of the steel plate 20; The upper end of the bent coupling portion 23 is made of a bent fitting portion 24 that is folded again bent downward; When the adjacent steel plate 20 is coupled to each other, the steel plate 20 is pressed down in a state in which the bent coupling portion 23 and the bending insertion portion 22 on one side are in contact with each other, so that the bending insertion portion 22 is pressed. The composite truss-type reinforcing bar assembly deck, characterized in that the bent coupling portion 23 and the bent fitting portion (24) is fitted between the adjacent steel plate 20 is coupled to each other. The method of claim 2, The composite truss-type reinforcing bar assembly deck, characterized in that the filling material for the closed chamber is interposed between the bending coupling portion 23 and the bending fitting portion 24 and the bending insertion portion 22.

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