KR100593663B1 - Connection method for composite slab - Google Patents

Abstract

The present invention relates to a longitudinal and transverse connecting method of the composite bottom plate, wherein the longitudinal connecting method is to form a vertical connection end by bending the extended end of the lower plate constituting the composite bottom plate upwards the uneven portion of the longitudinal connecting portion And bending the extended end of the extended lower plate of the other synthetic bottom plate connected to each other to form a ring connecting end to be hooked while covering the entire vertical connecting end inward, without installing a separate vertical reinforcement. In the state in which the ring connecting end functions as a vertical reinforcing material, a fastener penetrating the vertical connecting end and the ring connecting end is added to connect the synthetic bottom plates facing each other in the longitudinal direction, and in the case of the horizontal connecting part, the synthetic bottom The connecting end of the uneven portion constituting the lower plate on top of the composite bottom plate supporting structure including the mold supporting the plate Positioning the composite bottom plate so that the horizontal connecting end is bent and extended, the connecting end of the vertical reinforcing material installed in the transverse direction on the lower plate is positioned to face each other and connected to each other on the upper support structure, the horizontal The concave portions of the lower plate placed on the floor are connected to each other.

Composite bottom plate, reinforcement

Description

Connection method for composite slab

1A, 1B, 1C, 1D and 1E show examples of longitudinal connections of a conventional composite bottom plate and the composite bottom plate of FIG. 1D.

2A, 2B, 2C and 2D show examples of a perspective view and a cross-sectional view of a longitudinal connection of a composite bottom plate of the present invention.

3A and 3B show, in perspective and cross-sectional views, examples of lateral connections of a composite floor plate of the present invention.

<Description of Major Reference Signs>

100: synthetic bottom plate 110: bottom plate

120: bottom plate 130: perforated vertical reinforcement

200: Pier

The present invention relates to a method for connecting synthetic bottom plates. More specifically, the present invention relates to a longitudinal and transverse connection method of a composite deck.

Conventional bridge decks are typically constructed with RC concrete slabs (Reinforced Concrete Slab). It is common that such a RC floor plate is constructed with a thickness of about 20CM, and its own weight is large, and its rigidity is low, so that cracks and sags are generated as the common load (live load) acts, resulting in a decrease in the load capacity and durability of the floor plate. Plate repair and reinforcement work required a lot of manpower and cost. In addition, since construction works are installed by using temporary materials such as copper bars at the site, and construction is done by placing concrete, safety accidents and workability have not been reduced due to height work, and much labor and construction costs in the formwork and reinforcement work have to be increased. The problem was pointed out.

It is a synthetic slab or composite slab developed to replace the RC slab.

The composite bottom plate is usually manufactured in a state in which the lower plate and the concrete are synthesized by placing concrete to have a predetermined thickness on an upper portion of the lower plate made of steel plate, and the tensile stress generated by the common load and the self-weight is the lower plate. This burden, and the compressive stress is produced using a mechanical mechanism that causes the concrete to bear.

Examples of such a composite bottom plate are shown in FIGS. 1A, 1B, 1C, and 1D.

In the composite bottom plate 10a shown in FIG. 1A, an I-shaped steel 13a having a hole formed on an upper portion of the lower plate 12a supported by the mold 11a is installed to have a predetermined interval in the lateral direction. After installing the lower power reinforcing bars 14a to penetrate and installing the upper power reinforcing bars 15a on the bottom plate, the concrete 16a is placed and cured.

In the composite bottom plate 10b shown in FIG. 1B, the shear connector 13b and the reinforcing bars 14b are installed on the bottom plate in a lattice shape on the bottom plate 12b supported by the mold 11b, and then concrete It is constructed by pouring and curing (15b).

The composite bottom plate 10c shown in FIG. 1c is supported by the mold 11c, and the shear connector 13c and the reinforcing bars 14c are lattice-shaped on top of the lower plate 12c having the concave and convex portions. After installation, the concrete is poured and cured.

The composite bottom plate 10d of FIG. 1d is a Korean Patent Application No. 41239, which is also supported by a mold 11d, has a concave-convex portion A having a concave portion and a convex portion, and a lower plate having a shear connecting material 13d ( 12d), after installing the I-shaped beam 14d provided with the shear connector 13d in the concave portion, the concrete is poured and cured.

The composite floor plates (10a, 10b, 10c, 10d) is generally installed in the field by connecting the composite floor plate having a predetermined length and width in the longitudinal or transverse direction, the composite floor plate is a steel and concrete As well as being formed by synthesis, it is common to install a vertical reinforcement such as I-shaped steel on the lower plate in order to produce an efficient structural cross-section, in order to connect the composite bottom plate in the longitudinal and transverse directions by combining the vertical reinforcement In the connection of the floor plate, a connection model that can secure the constructability, structural efficiency, and economics is required.

Accordingly, in the longitudinal connecting portion of the composite bottom plate of Figure 1d, as shown in Figure 1e in the state that the convex portions of the lower plate constituting the composite bottom plate is installed to face each other, the convex portions facing each other by using an additional plate with a bolt and nut After fastening, it is introduced a configuration that connects the composite floor plates by pouring concrete.

This method can be the most common method of connecting the structural members, the use of the fasteners cause a relatively poor workability occurs. In addition, since the convex part should always be selected as the end of the longitudinal connection part, there is a problem that this method is difficult to use when the recesses are to be connected to each other by the longitudinal connection part.

The present invention is to solve the problems related to the longitudinal and transverse connections of the conventional composite floor plate, the object of the present invention is the workability is simple in the longitudinal and transverse connection of the composite floor plate workability It is to provide an excellent method for connecting composite floor plates.

The present invention to achieve the above technical problem

First, in constructing the longitudinal connecting portion of the composite bottom plate, in order to enhance the structural rigidity of the longitudinal connecting end to the vertical reinforcement can be formed in the connection, this vertical reinforcing material is processed by the shape of the longitudinal connecting end Easy to connect without installing a separate vertical reinforcement.

Second, in forming the lateral connection of the composite bottom plate, while connecting the vertical stiffeners using the backing plate to connect the vertical stiffeners installed in the lateral direction to each other, the lateral connection with the mold constitutes the composite bottom plate The lower plate does not have concave and convex portions so that the horizontal connecting plate can be configured to secure space for the construction of the connector with the mold and to facilitate the connection of the vertical reinforcement.

BRIEF DESCRIPTION OF DRAWINGS To describe the present invention more clearly and easily, the following describes the best embodiments of the present invention in detail with reference to the accompanying drawings, and embodiments according to the present invention may be modified in various other forms, and thus the scope of the present invention. It is not limited to the embodiment described below, it will be described by separating the longitudinal connecting portion and the transverse connecting portion of the composite bottom plate.

2A, 2B, 2C, and 2D illustrate a longitudinal connection state diagram of the composite bottom plate 100 of the present invention and a cross-sectional view in which a connection bottom plate is formed.

The longitudinal connection method of the composite bottom plate is the concave portion 110a and the convex portion 110b is provided with a concave-convex portion (A) formed bottom plate 110, the bottom plate material 120 and the concave-convex portion (A) In the composite floor plate connection installation comprising a vertical reinforcement 130 is fixed to the vertical portion 110a,

The longitudinal connecting portion of the composite bottom plate is formed in the shape of the uneven portion,

The concave-convex portion B of the longitudinal connecting portion is bent upward of the extended end of the lower plate 110 constituting the composite bottom plate to form a vertical connection end 140, and the extended lower plate of the other composite bottom plate ( The extended end of the 100 is also bent upward to form a hook connection end 150 to be hooked while covering the entire vertical connection end 130 inward, so that the vertical connection end and the loop connection end without a separate vertical reinforcement is installed. In the state to function as a vertical reinforcing material, by adding the fasteners 160, ie bolts and nuts (161, 162) passing through the vertical connecting end and the ring connecting end longitudinally connecting the composite bottom plate facing each other,

The extended end of the bottom plate 110 constituting the composite bottom plate is bent upward to form a vertical connection end 120, but the upper end is formed in a hook shape, the extension of the extended bottom plate 100 of the other composite bottom plate connected The bent end is also bent upward, but the hook-shaped upper end portion which is engaged with the hook-shaped vertical connection end upper end is formed to connect the bent vertical connection end to each other without a separate fastener.

The lower plate 110 of the present invention may be processed so that the uneven portion (A) is formed continuously by processing a steel plate having a predetermined thickness and may be similarly referred to as a deck plate, but is limited by the material and name The bottom plate 120 is generally not meant to refer to concrete, but a material acting by combining with the bottom plate as a material other than concrete is also included in the bottom plate of the present invention. Hereinafter, the lower plate will be described on the basis of the case of using a steel plate, the bottom plate concrete.

The lower plate 110 not only functions as a formwork in which concrete is cast a predetermined height, but also functions as a structural member that resists the lower tensile stress generated when a common load is applied to the composite floor plate, compared with a conventional RC floor plate. Therefore, it is possible to install the lower tensile reinforcing bar of the RC floor plate and to reduce the concrete cross section of the bottom plate tension part.

Thereby, there is an advantage that can significantly reduce the weight of the bottom plate, it is also provided with the advantage that the concave-convex portion (A) is formed continuously to improve the flexural rigidity and torsional rigidity.

The shape of the concave-convex portion A will be said to belong to the technical scope of the present invention as long as the concave portion and the convex portion are formed irrespective of their shape, such as a trapezoidal shape, a circle, and a triangle.

Such a lower plate is mounted on a mold which is a rigid box or PSC girder 200 which is installed at regular intervals on a pier, for example, in a bridge construction, and is connected to each other in the longitudinal direction.

Since the lower plate 110 installed as described above is exposed to the outside, corrosion of the lower plate may occur. Since the corrosion lowers the durability of the lower plate, it is preferable to prevent corrosion by applying a corrosion preventing strip to the surface, such as hot dip galvanizing.

The vertical stiffener 130 of the present invention serves as a tensile stress stiffener to resist the common load. Tensile stress is generated at the bottom of the bottom plate by the common load, and compressive stress is generated at the top. At this time, the tensile stress is mostly burdened by the lower plate as described above, when such a burden increases, a problem arises in that the thickness of the lower plate must be increased. Since the lower plate is economical and easy to manufacture according to its thickness, it is necessary to configure the optimum thickness, but alternative configuration, that is, tensile stress reinforcing material can be shared. As shown in Figure 1a will be described based on the case of using the I-shaped steel as the tensile stress reinforcing material.

The vertical reinforcement is fixedly installed vertically in the concave portion of the lower plate, which is not only a factor of unnecessarily increasing the thickness of the bottom plate when installed in the convex portion, but also being positioned at the position of forming the lower steel plate as a tensile stressor. It is structurally efficient. However, it may be installed in the concave portion, but in addition to the convex portion may include adding to match the final height of the bottom plate.

The fixed installation of the vertical reinforcement may be by welding.

Since the vertical reinforcement is installed in the recessed portion of the lower plate in the transverse direction, the longitudinal connection portion of the composite bottom plate does not include a vertical reinforcement connection configuration, but the transverse connection portion requires a vertical reinforcement connection configuration, which will be described later. .

Furthermore, a plurality of shear connecting materials may be further formed on the vertical reinforcement to enable the synthesis of the bottom plate 120 and the bottom plate 110 including concrete, and may also be installed on the bottom plate.

At this time, the longitudinal connection portion of the composite bottom plate eventually needs to be configured to connect the lower plate to each other in the present invention introduces two embodiments.

2A and 2B, the longitudinal connecting portion of the synthetic bottom plate is formed in the shape of the uneven portion, and the uneven portion of the longitudinal connecting portion extends from the lower plate 110 constituting the composite bottom plate. To bend upward to form a vertical connection end 140, and also to extend the end of the extended lower plate 100 of the other composite bottom plate connected to the upper end by wrapping the entire vertical connection end 140 inward Ring connection end 150 is to be formed.

The vertical connection end 140 is formed in a shape of bending the end of the lower plate of the concave-convex portion (B) located at the connection end of any one composite bottom plate.

That is, the end of the lower plate is extended by a predetermined length and then bent upward to form a vertical connection end 140 in the shape of a vertical reinforcement formed in the concave portion of the concave-convex portion as seen from above. Furthermore, the ends of the lower plate of the other synthetic bottom plate to be connected are also bent upward, but the vertical connection end 140 is formed inside so that the hook connection end 150 can be hooked.

This has the advantage that the composite bottom plate is mechanically interlocked with each other so that a connecting plate such as a separate backing plate is not necessary.

Furthermore, it is even more preferable to use the bolt 161 and the nut 162 to penetrate each other through the vertical connection end and the ring connection end.

When the longitudinal connecting portion is formed in such a structure, there is an advantage in that the vertical reinforcing member having the same function as that of the vertical reinforcing member is naturally formed by the vertical connecting end and the ring connecting end also in the longitudinal connecting portion. Therefore, the vertical reinforcement of the concave-convex portion of the composite bottom plate, which is also connected to the longitudinal connection portion, may have continuity, thereby securing the continuity of the connection portion, and thus may have a more structurally advantageous cross-sectional structure.

In the case of the second embodiment, as shown in Figure 2c and 2d, but the longitudinal connecting portion of the composite bottom plate in the shape of the concave-convex portion, it can be seen as an example to form the longitudinal connecting portion without the fastener of the embodiment 1, The longitudinal connecting portion of the composite bottom plate is formed in the shape of the concave-convex portion, the concave-convex portion of the longitudinal connecting portion is bent up the extended end of the lower plate 110 constituting the composite bottom plate to form a vertical connecting end 140 The upper end portion is formed in a hook shape, and the extended end of the extended lower plate 100 of the other synthetic bottom plate to be connected is also bent upward, but the hook-shaped upper end portion which is engaged with the upper end of the vertical connection end portion 140 is formed to separate. It is configured to connect the bent vertical connection end 150 with each other without fasteners.

The vertical connection end 140 is formed in the same manner as in Example 1, the hook is formed in the upper end as shown in Figure 2d. In addition, the vertical connection end 150 of the other composite bottom plate is bent upwards and the bottom plate is extended, and the vertical connection end is formed, the hook is engaged is formed while wrapping so that the hook is positioned inward. As a result, a mechanical joint is formed by the hook at the longitudinal connection of the composite bottom plate.

Connection by the hook has the advantage that a separate fastener does not need a fastener for forming a connection. Furthermore, since the vertical connection ends are formed to be opposite to each other, the vertical reinforcement is formed in the connection part is the same as the specific example 1.

2B and 2D illustrate cross-sectional views in which the connection bottom plate 160 is formed in a state in which the composite bottom plates are connected to each other in the longitudinal direction by the longitudinal connection parts of the first embodiment or the second embodiment.

That is, since the bottom plates of the longitudinal connecting portions are connected to each other in the longitudinal direction, the bottom plate constituting the composite bottom plate is not yet formed. Therefore, when the connection bottom plate is not formed at the time of manufacturing the composite bottom plate in the longitudinal connection portion in relation to the installation process sequence, it is necessary to form a separate connection bottom plate material at different times.

Therefore, after connecting the composite bottom plate in the longitudinal direction, the connection bottom plate material 161 of concrete is formed.

Figures 3a and 3b is a perspective view and a cross-sectional view of the lateral connection of the composite bottom plate 100 of the present invention.

The order of the transverse connection of the present invention does not matter, but the composite bottom plate connected to each other by the longitudinal connection is connected to each other in the transverse direction, thereby forming a transverse connection of the present invention,

The lateral connecting portion is a horizontal connecting end 170 in which the connecting portion of the uneven portion constituting the bottom plate on the upper side of the composite bottom plate supporting structure including a mold 200 for supporting the composite bottom plate is bent downward. Positioning the composite bottom plate to be mounted, the connecting end of the vertical reinforcing material installed in the transverse direction on the lower plate facing each other connected to each other in the upper portion of the support structure, the recessed portion of the lower plate placed horizontally It is done by connecting.

The connecting end of the composite bottom plate connected in the transverse direction is bent downwardly convex portion of the concave and convex portion of the lower plate further extends to the composite bottom plate support structure, that is, the mold upper surface to form a horizontal connection end 170.

That is, the horizontal connection end 170 is positioned in such a way that it is installed on the mold, and the horizontal connection end has a tapered portion extending downwardly by convex portions of the lower plate 110, thereby connecting the bottom plate material to the horizontal connection portion. Filling the floorboards is possible when pouring.

Horizontal connecting end of each lower plate is to be coupled to each other in the form of connection by welding or the like in a state positioned to face each other at the center of the upper surface of the rough mold.

The transverse connecting ends are to be connected to each other the I-beams, which are tensile stress stiffeners, connected to each other while the lower plate is connected.

I-shaped steel can be attached to each other using the fasteners, such as bolts and nuts to put the back plate 180 on the abdomen, may be connected to each other flanges.

Synthetic floor plate configured as described above can be installed in a way that is directly installed in the field or modularized in the factory as a precast member in a simple mounting on the site.

That is, it is possible to install by mounting the modular composite floor plate longitudinally and transversely connected in accordance with the longitudinal and transverse connecting portions described above on the mold in the field in the state of manufacturing the composite floor plate in the factory in advance. .

Since the lower plate is usually provided with vertical perforated reinforcement, compressed reinforcing bars, backing reinforcing bars, etc., the modularization of the present invention is made by casting and curing the bottom plate in advance at the factory to produce a composite floor plate in a segmented state, and then synthesizing between the mold and the mold. It is installed by mounting the bottom plate. This makes it possible to omit the work process of pouring and curing concrete in the field, and it is necessary to install the bottom plate of the connection part only at the connection part.

The connection method of the composite floor plate of the present invention is excellent in workability, the connection performance can be sufficiently secured to prevent the degradation of rigidity in the connection of the composite floor plate, easy to quality control for the installation of the composite floor plate and economical Installation of phosphorus composite bottom plate is possible

Claims (8)

Vertically fixed to the bottom plate 110, bottom plate material 120 and the concave portion (110a) of the concave-convex portion (A) with the concave portion (110a) and the convex portion (110b) provided with the concave portion (110b) In the composite floor plate connection installation comprising a reinforcement 130, The longitudinal connecting portion of the composite bottom plate is formed in the shape of the uneven portion, The concave-convex portion of the longitudinal connecting portion bends the extended end of the lower plate 110 constituting the composite bottom plate to form a vertical connection end portion, and the extended end of the extended lower plate 110 of the other composite bottom plate to be connected. Also bent up to form a hook connection end 150 to be hooked while covering the entire vertical connection end 140 inward, the vertical connection end and the ring connection end function as a vertical reinforcement without installing a separate vertical reinforcement In the composite bottom plate connecting method characterized in that for connecting the composite bottom plate facing each other in the longitudinal direction by adding a fastener penetrating the vertical connection end and the ring connection end. Vertically fixed to the bottom plate 110, bottom plate material 120 and the concave portion (110a) of the concave-convex portion (A) with the concave portion (110a) and the convex portion (110b) provided with the concave portion (110b) In the composite floor plate connection installation comprising a reinforcement 130, The longitudinal connecting portion of the composite bottom plate is formed in the shape of the uneven portion, The concave-convex portion of the longitudinal connection portion is bent upward of the extended end of the lower plate 110 constituting the composite bottom plate to form a vertical connection end portion, but the upper end to form a hook shape, the extended lower plate of the other composite bottom plate connected ( The extended end of 110) is also bent upward, but hook-shaped upper end portion is formed to engage the upper end of the hook-shaped vertical connection end to connect the bent vertical connection end with each other, without installing a separate vertical reinforcement material The vertical connecting end and the ring connecting end function as a vertical reinforcing material to connect the composite bottom plate facing each other in the longitudinal direction. The method of claim 1, wherein the fastener is a bolt and a nut, but the bolt is installed so as to pass through the vertical connection end and the ring connection end, and then tightening the bolt with a nut to connect the composite bottom plate in the longitudinal direction How to connect the bottom plate. The method according to claim 1 or 2, further comprising forming a connection part bottom plate comprising concrete on the bottom plate connected in the longitudinal direction. The method of claim 1 or 2, wherein the longitudinally connected composite bottom plate is further connected in the transverse direction, wherein the transverse connection is The composite bottom plate is placed so that the connecting end of the uneven portion constituting the lower plate is bent downward and the horizontal connecting end is placed on top of the composite bottom plate supporting structure including the mold supporting the composite bottom plate. The connecting ends of the vertical reinforcing materials installed in the transverse direction on the lower plate are positioned to face each other and connected to each other in the upper portion of the support structure, Composite bottom plate connection method characterized in that by connecting the concave portions of the lower plate placed on the horizontal. According to claim 5, The connection of the connecting end of the vertical reinforcement And a fastener penetrating the connecting end of the backing plate and the vertical reinforcing material in a state in which the connecting end portions of the vertical reinforcing materials facing each other are further installed. The method of claim 5, wherein the connection of the concave portion of the lower plate is made by welding the connecting end portions of the concave portions facing each other. 6. The method of claim 5, further comprising forming a connection bottom plate including concrete on the bottom plate connected in the lateral direction.

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