JP2001172916A - Corrugated synthetic floor slab - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a corrugated synthetic floor slab that does not cause a corrugated steel plate 21 and concrete 12 to be peeled easily, is highly stiff, has improved loading resistance and durability and improved execution working efficiency at a field, can save power and costs, and at the same time can mount an accessory structure such as inspection path structure to a bridge. SOLUTION: Turning one's attention to the combination of a corrugated steel plate 21 whose section is in an inverse trapezoid shape with concrete 12, the corrugated steel plate 21 whose sectional shape is formed by allowing a trapezoid shape and an inverse trapezoid shape to continue alternately is provided, an outer region 24 that is demarcated at an area to the outside by the corrugated steel plate 21 shows an inverse trapezoid shape, and at the same time an inner region 25 where concrete 12 is filled shows a trapezoid shape by the corrugated steel plate 21.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a corrugated composite slab, and more particularly to a wide bridge such as a small main girder bridge and a two main I-girder bridge, as well as a retaining wall, a quay wall and other wall structures. The present invention relates to a corrugated composite floor slab used in the present invention.

[0002]

2. Description of the Related Art A widened bridge such as a small main girder bridge or a two main I girder bridge, which can reduce the production cost and is excellent in maintainability, has begun to spread as a conventional bridge structure has been proposed as a conventional bridge. . FIG. 7 is a perspective view of a main part of a general two-main I-girder bridge 1 (wide-width member bridge).
Has a main girder 3 made of a pair of I-beams 2 and a floor slab 4 laminated on the main girder 3. The I-beam 2 has a web 5, an upper flange 6, and a lower flange 7.

In the two-main I-girder bridge 1 having such a configuration, the floor slab 4 supports a load as a part of a structural member and shares a sectional force. Is required.

As the floor slab 4, a conventional RC (Reinf)
PC (Prestr) that introduces prestress in the direction perpendicular to the bridge axis instead of the slab
Essed Concrete) slabs are widely used. However, there is a problem that the cost of the PC slab is almost twice as high as that of the RC slab. Further, there is a problem that the construction of the PC slab requires advanced technology including its quality control.

[0005] Compared with such RC slabs or PC slabs, a composite slab made of steel plate and concrete has a large effect of labor saving on site including omission of a formwork for concrete casting. In addition, it has high load-bearing performance, and is expected to be used as a floor slab for a low-main girder rationalized bridge. However, in the conventional composite floor slab,
Since it involves thin steel sheet processing and welding work, the cost of the floor slab 4 cannot be reduced even when compared with the PC slab, and it is generally evaluated that the total construction cost is about the same as the PC slab. There is a problem that is.

[0008] For example, FIG. 8 is a schematic side view enumerating various examples of a steel plate portion in a composite floor slab. The steel plate 8 laminated on the upper flange 6 of the I-beam 2 includes an I-beam 9 and an H-beam. Steel 1
0 or L-shaped steel 11 etc. are arranged in the direction perpendicular to the bridge axis,
It is to be welded to the steel plate 8. The concrete 12 is cast over the steel plate 8 so as to be laminated.

In the steel plate 8 having such a structure, I
The rigidity is secured against the bending moment in the span direction between the shaped steel members 2. A reinforcing bar (not shown) is arranged in the bridge axis direction.
Shaped steel such as shaped steel 9, H-shaped steel 10, and L-shaped steel 11 are used as guides when arranging reinforcing bars. For joining concrete 12 and steel members, I-beam 9, H-beam 10 or L-beam
A through hole is formed in the shape steel 11, and a stud dowel (not shown) is attached on the steel plate 8 to be synthesized. However, a considerable number of stud dowels are required to secure the steel sheet 8 and the concrete 12 with only stud dowels. Furthermore, I-section steel 9, H-section steel 10 or L-section steel 1
1 to the appropriate length, and I-beam 9 to steel plate 8,
It is necessary to weld the H-shaped steel 10 or the L-shaped steel 11, etc., which increases the production cost at the factory.

FIG. 9 is a sectional view of an essential part of a composite slab 13 proposed to adopt a corrugated steel plate as the steel plate 8,
The composite floor slab 13 includes a corrugated steel plate 14 and a concrete 12.
And The corrugated steel sheet 14 is formed by combining a plurality of steel sheet piles 15 (trapezoidal unit steel sheets) having a trapezoidal cross section conventionally used for earth retaining and the like in the lateral direction.
Are combined and placed on the upper flange 6 of the I-shaped steel 2, and the concrete 12 is cast after the bridge axis reinforcing steel 16 and the bridge axis perpendicular reinforcing steel 17 are arranged to form the composite floor slab 13.

As described later, the composite slab 13 having such a structure also has insufficient load resistance and durability as a slab, and particularly has cracks in the concrete 12 portion, and furthermore, the corrugated steel plate 14 and the concrete 12 The problem of separation or peeling (peeling) occurs. That is, the conventional steel sheet pile 1
The floor slab using No. 5 has a problem of load resistance, cracks, and peeling, and it is difficult to use the floor slab as a bottom plate of the composite slab as it is.

[0010]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and has a high rigidity, a high load resistance and a high durability, and can reduce the cost. It is an object to provide a composite floor slab.

Another object of the present invention is to provide a corrugated composite slab in which the corrugated steel sheet and the concrete are hardly peeled off.

Another object of the present invention is to provide a corrugated composite slab that is excellent in workability at the site and saves labor.

It is another object of the present invention to provide a corrugated composite slab to which an attached structure such as an inspection path structure can be attached to a bridge.

[0014]

That is, the present invention focuses on combining a corrugated steel sheet having an inverted trapezoidal cross section with concrete, and comprises a corrugated steel sheet having a steel sheet and concrete cast on the steel sheet. A synthetic slab, wherein the steel sheet is a corrugated steel sheet having a cross-sectional shape alternately and continuously having a trapezoidal shape and an inverted trapezoidal shape, and the corrugated steel plate defines an outer portion defined between the corrugated steel plate and the outside. A corrugated composite floor slab characterized in that a side region has an inverted trapezoidal shape and an inner region filled with the concrete by the corrugated steel plate has a trapezoidal shape.

A load may be applied from the side of the concrete to the side of the corrugated steel sheet.

The corrugated steel sheet can be constructed by connecting an inverted trapezoidal unit steel sheet having an inverted trapezoidal cross-section and connecting portions at both ends thereof continuously.

The corrugated steel sheet can be constituted by connecting trapezoidal unit steel sheets having a trapezoidal cross section and connecting portions at both ends thereof continuously.

An accessory structure can be attached to an outer region of the corrugated steel sheet.

A stud can be attached to the corrugated steel sheet.

In the present invention, "trapezoid" means that the lower side is longer than the upper side with respect to the upper side and the lower side which are parallel to each other, and "reverse trapezoid" means that the upper side is the upper side and the lower side which are parallel to each other. It shall be longer than the lower side.

The corrugated composite floor slab according to the present invention is used not only for wide-width bridges such as a small girder bridge and a two-main I-girder bridge but also for other bridges. It can be used for offshore structures, earth retaining structures, wall structures such as retaining walls or quay walls and other civil engineering structures, etc.
Connection of panel materials is also possible. Furthermore, if the corrugated shape is positively used and the wavefront faces upward and is used as a floor of an experimental facility or a warehouse, the installation structure can be easily fixed.

In the corrugated composite floor slab according to the present invention, since a corrugated steel plate having an inverted trapezoidal (or trapezoidal) cross section is combined with concrete, a vertical downward load (ie, “positive”) is applied to the bridge. Even if a load is applied, the compressive action of the concrete works effectively, the peeling of the concrete and the corrugated steel plate can be accurately avoided, and the load bearing performance can be improved. It also has an effective load resistance against "load load" upward in the vertical direction. Further, FIG.
The welding work of the steel sheet 8 and the I-shaped steel 9 and the like and the cutting work of the I-shaped steel 9 and the like as shown in (1) are not required, the workability is good, and labor can be saved. That is, in order to attach the corrugated composite floor slab according to the present invention to the main girder of a bridge, for example, a corrugated steel plate is placed and fixed on the upper flange of an I-shaped steel,
Preferably, the stud is preferably attached to the corrugated steel sheet, and only the concrete is cast after arranging the reinforcing steel in the bridge axis direction and the reinforcing steel in the direction perpendicular to the bridge axis, so that the workability can be improved and the cost can be significantly reduced. . In addition, the corrugated steel sheet itself can be used as a scaffold for work, and can also be used as a formwork for a lower portion during concrete casting.

[0023]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, a corrugated composite slab 20 according to an embodiment of the present invention will be described with reference to FIGS. However, the same parts as those in FIGS. 7 and 8 are denoted by the same reference numerals, and detailed description thereof will be omitted. FIG. 1 is a longitudinal sectional view (in the direction perpendicular to the bridge axis) of a corrugated composite floor slab 20. The corrugated composite floor slab 20 includes a corrugated steel plate 21, a stud 22, It has an axial reinforcing bar 16, a bridge-axis perpendicular reinforcing bar 17, and concrete 12.

The corrugated steel plate 21 is a combination of a plurality of inverted trapezoidal unit steel plates 23 having a reverse trapezoidal cross section. The inverted trapezoidal unit steel plate 23 has a length sufficient to pass the span distance in the direction perpendicular to the bridge axis of the main girder 3, and has a cross-sectional shape of an inverted trapezoidal upper side surface 23 </ b> A viewed in the vertical direction and a direction approaching each other. A pair of left and right inclined surfaces 23B that are inclined at the same inclination angle, and a pair of left and right connection surfaces 23C extending from the inclined surface 23B to both left and right ends in the horizontal direction. (Left side)
D and an engaging groove 23E are formed on the other side (right side in the figure). The engaging ridge 23D has an engaging groove 2
3E are engaged so as to overlap each other from above, and the engaging portions 23F
Forming a plurality of inverted trapezoidal unit steel plates 23
Are joined in the direction of the bridge axis in a horizontal plane so as to cover a predetermined area.

An upper side surface 23A and a pair of left and right inclined surfaces 23
B forms an outer region 24 having an inverted trapezoidal cross section. The outer region 24 is defined between the corrugated composite floor slab 20 and the corrugated steel plate 21 and the outside on the lower side in the vertical direction, and has an inverted trapezoidal shape. The inclined surface 23B and the connection surface 23C on one side (for example, right side) of a certain inverted trapezoidal unit steel plate 23, and the other side (for example, left side) of another inverted trapezoidal unit steel plate 23 adjacent to the inverted trapezoidal unit steel plate 23. The inner area 25 is formed by the inclined surface 23B and the connection surface 23C. The concrete 12 is cast and filled in the inner area 25. Inner area 25
Are constricted portions 25A between adjacent upper side surfaces 23A, and adjacent connecting surfaces 23C joined by engaging portions 23F.
Has an enlarged part 25B. Thus, the corrugated steel plate 21 has an inverted trapezoidal outer region 24 and a trapezoidal inner region that are alternately continuous in cross section. The load will be applied toward.

The inverted trapezoidal unit steel plate 23 has a thickness of 1 to 8 m to resist the weight of the cast concrete 12.
m, preferably 6 mm. Further, the wave height is about 50 to 200 mm, preferably 160 mm in order to cope with a wide range of the span distance of about 2 to 12 m. The interval between the waves (the length of the inverted trapezoidal unit steel plate 23 in the horizontal direction) depends on the height of the waves, but is practically about 200 to 600 mm. In the case of a long-span floor slab, the specifications of the inverted trapezoidal unit steel plate 23 or the corrugated steel plate 21 are determined by the weight of the concrete 12 at the time of casting. Shape unit steel plate 2
3 can be reduced in size, and the same steel plate can cope with a longer span distance.

The stud 22 is fixed to the upper side surface 23A of the inverted trapezoidal unit steel plate 23 by any means such as welding and is attached thereto.
To strengthen the joint with the corrugated composite floor slab 20 to additionally assure the integrity.

The thickness of the concrete 12 varies depending on the magnitude of the passing traffic load.
When the neutral axis or the neutral surface is located above the corrugated steel plate 21, the corrugated steel plate 21 effectively acts on tension due to load, and the concrete 12 effectively acts on compression. it can.

An arbitrary bridge can be constructed by fixing the corrugated composite floor slab 20 having such a structure to the upper flange 6 of the I-section steel 2 for example. FIG. 2 is a cross-sectional view in the direction perpendicular to the bridge axis showing an example of the load-bearing experiment of the type of the proposed composite slab 13 as shown in FIG. 9 and the type of the corrugated composite slab 20 according to the present invention. . FIG. 2 (1) shows a corrugated composite slab 20 (1) according to the present invention, which is of a type without studs 22. Fig. 2 (2)
Shows a corrugated composite floor slab 20 (2) of the type shown in FIG. FIG. 2 (3) shows a corrugated composite floor slab 20 (3) in which an angle member 26 is welded to the upper side surface 23A instead of the stud 22 in the same manner. FIG.
(4) is the same as the composite floor slab 13 shown in FIG.
A composite floor slab 13 (1) of a type in which bolts 27 are welded to the connection surface 23C at a predetermined density (50 cm pitch) in the length direction of the steel sheet pile 15 (that is, in the direction perpendicular to the bridge axis) is shown. FIG. 2 (5) is the same as the composite floor slab 13 (1), in which bolts 27 are welded at twice the density (25 cm pitch) in the length direction of the steel sheet pile 15 (ie, in the direction perpendicular to the bridge axis). Shows a composite floor slab 13 (2). FIG. 2 (6) shows a composite floor slab 13 (3) of the type in which a reinforcing bar 28 is welded to the upper surface of a steel sheet pile 15 in the bridge axis direction.

These corrugated composite floor slabs 20 (1), 20
For (2) and the composite floor slabs 13 (1), (2), and (3) (that is, for all except the corrugated composite slab 20 (3)), a positive bending load (vertical downward load) is applied to the center of each. ) Was applied and the deflection was measured. That is, FIG.
Is a graph of a positive bending load displacement curve showing a relationship between deflection and load, wherein the composite floor slab 13 (3) has the smallest load resistance, and the composite floor slab 13 (1) and the composite floor slab 13 ( 2)
The load-bearing capacity of the corrugated composite slab 20 (1) and the corrugated composite slab 20 (2) is greater than that of the corrugated composite slab 20.
It can be seen that the load resistance of (2) is the maximum.

The peeling (peeling) between the corrugated steel plate 21 and the concrete 12 is caused by a corrugated composite floor slab 20 (1) other than the corrugated composite floor slab 20 (2) and a corrugated composite floor slab 13 (1). In the corrugated composite floor slab 13 (2) and the corrugated composite floor slab 13 (3), they are generated on the upper surface of the corrugated steel plates 21 and 14 (the surface corresponding to the upper side surface 23A of the inverted trapezoidal unit steel plate 23). However, after the peeling occurred, the integrity of the corrugated steel plates 21 and 14 and the concrete 12 was reduced, and the composite effect was reduced or disappeared, and the same behavior as that of the lap beam was started. Corrugated composite floor slab 20
Although peeling occurred also in (2), the corrugated steel sheet 2 was brought to the final state.
1 and concrete 12 were maintained. This maintaining action is considered to be due to the stud 22 interposed in the upper side surface 23A of the inverted trapezoidal unit steel plate 23.

The crack state at the end of the concrete 12 portion is locally generated in the corrugated composite floor slab 13 (1), the corrugated composite floor slab 13 (2), and the corrugated composite floor slab 13 (3). However, the corrugated composite floor slabs 20 (1) and 20 (2) were fine and dispersed.

FIG. 4 is a graph showing a negative bending load displacement curve of the corrugated composite floor slab 20 (2) and the corrugated composite floor slab 20 (3). It shows the same load capacity as the case. Corrugated composite floor slab 20
It can be seen that both (2) and the corrugated composite floor slab 20 (3) have the same or higher load resistance as the corrugated composite floor slab 20 (2) in the positive bending load displacement test.

As can be seen from the above experiment, the corrugated composite floor slab 20 according to the present embodiment has the corrugated steel plate 21
Is formed in an inverted trapezoidal shape to ensure high load resistance, and the combination of the corrugated steel plate 21 and the stud 22 can maximize the load resistance and the combined effect as a composite floor slab. That is, the corrugated steel plate 21
Since the cross-sectional shape of the (outer region 24) is an inverted trapezoidal shape different from the existing steel sheet pile 15 (FIG. 9), when a large load is applied, the composite connection portion (the constricted portion 25A and the expanded portion 25) is formed.
B) in the inner region 25), the conventional composite slab 1
3 and the like, the corrugated steel plate 21 acts to tighten the concrete 12, and the corrugated steel plate 21 and the concrete 1
2 has a function of mechanically joining them. Furthermore, the joining effect is combined with the stopping effect of the stud 22, so that a greater load bearing performance can be exhibited. Further, even when the concrete 12 and the corrugated steel plate 21 are separated, the frictional force between the concrete 12 and the corrugated steel plate 21 increases, and a decrease in the load-bearing capacity can be prevented in combination with the action of preventing the studs 22 from shifting. And the corrugated steel plate 21 shows excellent synthetic behavior.

Further, since the corrugated steel plate 21 works as a bottom plate instead of a tensile reinforcing bar in an RC floor slab or the like,
Main reinforcement (reinforcement perpendicular to bridge axis 17)
Can be omitted, and the rebar construction period can be halved. Further, even when the present invention is applied to a small main girder bridge slab, since it can be constructed in the same manner as the RC slab, site management is easy and no special technology is required.

That is, the corrugated composite floor slab 20 according to the present invention.
In order to construct on the site, the engaging groove 23E is engaged with the engaging ridge 23D so as to overlap from above, so that the corrugations are arranged in the bridge axis direction to form the engaging portion 23F, It is only necessary to arrange the corrugated steel plates 21 on the main girder 3 sequentially, and the workability of the construction is good. Stud dowels and metal fittings (not shown) for arranging reinforcing bars are arranged on the upper flange 6 side of the main girder 3, and these are used to arrange some reinforcing bars (not shown) for preventing cracks. Corrugated steel sheet 2
After placing a concrete casting formwork (not shown) on the side surface of the concrete 1, concrete 12 is cast into the corrugated composite floor slab 20. For joining with the main girder 3, a stud dowel or a bolt on the main girder 3 (upper flange 6) is penetrated through an opening at the bottom of the corrugated steel plate 21, and concrete 1
2, a method of providing a space between the main girder 3 and the corrugated steel plate 21 and filling the space with the concrete 12 can be considered.

The corrugated composite floor slab 20 according to the present invention exhibits the above-mentioned good load resistance and workability, and can attach various attached structures by utilizing the outer region 24. . For example, FIG. 5 is a cross-sectional view showing a state in which the inspection path 29 (attached structure) is hung, and has an inverted trapezoidal cross section as an attachment that can be engaged with the outer region 24 of the corrugated steel plate 21. The lowering engagement member 30 is engaged with the outer region 24, and the inspection path 29 is hung on the suspension member 31 attached to the lowering engagement member 30, and is easily fixed to the lower surface of the corrugated steel plate 21. be able to. In addition to this, any accessory structure can be joined under the corrugated composite floor slab 20 using the suspending engagement member 30 and the suspension member 31, and can be suspended.

In the present invention, the unit steel sheet for forming the corrugated steel sheet 21 is an inverted trapezoidal unit steel sheet 23.
The present invention is not limited to this, and any material can be adopted as long as the corrugated steel plate 21 can be formed by joining each other. For example, FIG.
It is sectional drawing of the trapezoidal unit steel plate 32 reverse to the inverted trapezoidal unit steel plate 23, and the trapezoidal unit steel plate 32 is inclined in the direction approaching mutually with the trapezoidal lower side surface 32A seen from the vertical direction. A pair of left and right inclined surfaces 32B, a pair of left and right connecting surfaces 32C extending from the inclined surface 32B to both left and right ends in the horizontal direction,
And an engaging projection 32D is formed on one (left side in the figure) of the connection surface 32C and an engaging groove 32E is formed on the other side (right side in the figure). Engagement ridge 32D
The plurality of trapezoidal unit steel plates 32 are joined in the bridge axis direction in a horizontal plane to cover a predetermined area by forming the engaging portions 32F by engaging the engaging groove portions 32E so as to overlap each other from above. Be able to do it.

A lower surface 32A and a pair of left and right inclined surfaces 32
B makes it possible to form the inner region 25 having a trapezoidal cross section. Concrete 12 cast in inner area 25
Will be filled. One side (for example, right side) inclined surface 32B and connection surface 32 of a certain trapezoidal unit steel plate 32
C, the other trapezoidal unit steel plate 32 and the other side (for example, the left side) of the inclined surface 32B and the connection surface 32C of the other trapezoidal unit steel plate 32 form the inverted trapezoidal outer region 24. The inner region 25 includes a constricted portion 25A between adjacent connecting surfaces 32C joined by the engaging portions 32F, and a lower side surface 32A.
And the function as the corrugated steel plate 21 described above can be exhibited.

[0040]

As described above, according to the present invention, a corrugated steel plate and concrete are synthesized and integrated using a steel plate having an inverted trapezoidal cross section obtained by bending a ready-made steel plate in a composite floor slab. With this configuration, cutting and welding processes other than corrugated steel sheet processing can be omitted, enabling significant cost reductions. In addition, compared to conventional RC slabs and PC slabs, formwork on site Construction and removal are not required, the construction period can be shortened to 1/3 to 1/4 compared to cast-in-place slabs, installation on the site is easy, and labor saving at the site is possible, withstand load and durability. It can be a synthetic floor slab with excellent properties.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view (in a direction perpendicular to a bridge axis) of a corrugated composite floor slab 20 according to an embodiment of the present invention.

FIG. 2 shows a proposed composite floor slab 1 as shown in FIG.
3 is a cross-sectional view in the direction perpendicular to the bridge axis showing a load-bearing experiment example of the type 3 and the corrugated composite slab 20 according to the present invention. FIG. And a corrugated composite floor slab 20 without studs 22
FIG. 2B shows a corrugated composite floor slab 20 (2) of the type shown in FIG.
(3) The angle material 26 is used instead of the stud 22
Composite floor slab 2 of a type in which is welded to the upper side surface 23A portion
0 (3), and FIG. 2 (4) shows the composite floor slab 13 shown in FIG.
A composite floor slab 13 of the type in which bolts 27 are welded to the connection surface 23C at a predetermined density (50 cm pitch) in the length direction of the steel sheet pile 15 (ie, in the direction perpendicular to the bridge axis).
FIG. 2 (5) is the same as the composite floor slab 13 (1) except that the bolt 27 has a double density (25 cm pitch) in the length direction of the steel sheet pile 15 (that is, in the direction perpendicular to the bridge axis). FIG. 2 (6) shows a composite floor slab 13 (2) of the type welded in FIG.
The composite floor slab 13 (3) of the type in which the reinforcing bar 28 is welded to the upper surface of the steel sheet pile 15 in the bridge axis direction is shown.

FIG. 3 is a graph of a positive bending load displacement curve showing the relationship between deflection and load.

FIG. 4 is a graph of a negative bending load displacement curve for the corrugated composite floor slab 20 (2) and the corrugated composite floor slab 20 (3).

FIG. 5 is a cross-sectional view showing a state where the inspection path 29 (attached structure) is suspended.

FIG. 6 is a cross-sectional view of a trapezoidal unit steel plate 32 that can be adopted as a unitary steel plate for forming the corrugated steel plate 21 in the present invention and that is opposite to the inverted trapezoidal unit steel plate 23.

FIG. 7 is a perspective view of a main part of a conventional two-main I-girder bridge 1 (wide bridge).

FIG. 8 is a schematic side view listing examples of a steel plate portion in the composite floor slab.

FIG. 9 is a sectional view of a main part of a composite floor slab 13 proposed to adopt a corrugated steel plate as the steel plate 8;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Two main I-girder bridges (wide bridge, Fig. 7) 2 I-beam 3 Main girder 4 Floor slab 5 Web of I-beam 2 Upper flange of I-beam 2 Lower flange of I-beam 2 Steel plate 9 I-shaped steel 10 H-shaped steel 11 L-shaped steel 12 Concrete 13 Synthetic floor slab 13 (1) Synthetic floor slab ((4) in FIG. 2) 13 (2) Synthetic floor slab ((5) in FIG. 2) 13 (3) 2) Composite floor slab ((6) in FIG. 2) 14 Corrugated steel plate 15 Steel sheet pile (trapezoidal unit steel plate) 16 Reinforcement in the bridge axis direction 17 Reinforcement in the direction perpendicular to the bridge axis 20 Corrugated composite slab (embodiment, FIG. 1) 20 (1) Corrugated composite slab ((1) in FIG. 2) 20 (2) Corrugated composite slab ((2) in FIG. 2) 20 (3) Corrugated composite slab ((3) in FIG. 2) 21) Corrugated steel plate 22 Stud 23 Inverted trapezoidal unit steel plate 23A Upper side surface of inverted trapezoidal unitary steel plate 23B A pair of left and right inclined surfaces of inverted trapezoidal unitary steel plate 23 C A pair of left and right connection surfaces of the inverted trapezoidal unit steel plate 23D An engaging ridge portion of the inverted trapezoidal unit steel plate 23E An engaging groove of the inverted trapezoidal unit steel plate 23F An engaging portion of the inverted trapezoidal unit steel plate 24 Side region 25 inner region 25A constricted portion of inner region 25 25B enlarged portion of inner region 25 26 angle material 27 bolt 28 rebar 29 inspection path (attached structure) (FIG. 5) 30 suspension engaging member 31 Suspension material 32 Trapezoidal unit steel plate (FIG. 6) 32A Lower side surface of trapezoidal unit steel plate 32 32B Pair of left and right inclined surfaces of trapezoidal unitary plate 32 32C Pair of left and right connection surfaces of trapezoidal unit steel plate 32D Trapezoidal unit steel plate 32 32E engaging groove of trapezoidal unit steel plate 32E engaging groove of trapezoidal unit steel plate 32

Claims (6)

[Claims] 1. A corrugated composite floor slab having a steel plate and concrete cast on the steel plate, wherein the steel plate has a cross-sectional shape in which a trapezoidal shape and an inverted trapezoidal shape are alternately continuously formed. The corrugated steel sheet has an outer region defined between the corrugated steel plate and the outside, and has an inverted trapezoidal shape, and the inner region filled with the concrete by the corrugated steel plate has a trapezoidal shape. A corrugated composite floor slab characterized by that. 2. The corrugated composite floor slab according to claim 1, wherein a load is applied from the side of the concrete to the side of the corrugated steel sheet. 3. The corrugated steel sheet is formed by continuously connecting inverted trapezoidal unit steel sheets having a cross-sectional shape of an inverted trapezoid and connecting portions at both ends thereof. The corrugated composite floor slab according to claim 1, 4. The corrugated steel sheet is formed by continuously connecting trapezoidal unit steel sheets each having a trapezoidal cross-sectional shape and having connection portions at both ends thereof. Item 7. A corrugated composite floor slab according to Item 1. 5. The corrugated composite floor slab according to claim 1, wherein an attached structure can be attached to an outer region of the corrugated steel sheet. 6. The corrugated composite floor slab according to claim 1, wherein a stud is attached to the corrugated steel sheet.