JP2010101044A - Reinforced concrete slab - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a reinforced concrete slab having shear-reinforced structural reinforcements and excelling in workability in the field by allowing the structural reinforcements to be easily built up on the site. <P>SOLUTION: The reinforced concrete slab includes the shear-reinforced structural reinforcements having main reinforcements 11, 12 and distributing bars 21, 22, and concrete 30 placed to include the structural reinforcements. A large number of main reinforcement lattice truss reinforcements 10 formed by subjecting shear reinforcement to the main reinforcements 11, 12, and a large number of distributing bar lattice truss reinforcements 20 formed by subjecting shear reinforcement to the distributing bars 21, 22, are allowed to intersect in lattice shape in a state of the distributing bar lattice truss reinforcements 20 penetrating the juxtaposed main reinforcement lattice truss reinforcements 10 to pass through the openings of the respective main reinforcement lattice truss reinforcements over the whole length of the distributing bar lattice truss reinforcements, thus constituting the structural reinforcements. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a reinforced concrete plate provided with a structural reinforcing bar and a concrete placed so as to include the structural reinforcing bar.

  As is well known, a reinforced concrete plate includes a structural reinforcing bar and concrete that is placed so as to include the structural reinforcing bar. 6 is a plan view showing a structural reinforcing bar of a conventional reinforced concrete plate, and FIG. 7 is a front view of the structural reinforcing bar of FIG.

  As shown in FIG. 6, the structural reinforcing bar of the conventional reinforced concrete plate extends in one direction out of two orthogonal vertical and horizontal directions and is parallel to each other, and in the other of the two vertical and horizontal directions. A number of extending reinforcing bars 60 that are parallel to each other are arranged in a lattice pattern, and each intersection that intersects the cross is joined by welding.

  As shown in FIG. 7, each of the large number of the main reinforcing bars 50 is composed of an upper compression main reinforcing bar 51 and a lower tensile main reinforcing bar 52 that are linearly arranged in a straight line. Each of the large number of the distribution reinforcing bars 60 includes an upper compression distribution reinforcing bar 61 and a lower tensile distribution reinforcing bar 62 which are arranged in parallel in a straight line. These main reinforcing bars 50 and distribution reinforcing bars 60 are reinforcing bars that resist bending. Reference numeral 70 denotes concrete which is placed so as to include a structural reinforcing bar including the main reinforcing bar 50 and the distribution reinforcing bar 60 which are arranged in a grid pattern in the vertical and horizontal directions.

  As described above, in general, unlike a concrete beam, a reinforced concrete plate is rarely provided with a shear reinforcing bar for a shearing force acting in an out-of-plane direction (thickness direction).

With regard to reinforced concrete plates to which shear reinforcement has been applied, at present, shear reinforcement bars are manually attached at the intersections between main reinforcing bars and distribution reinforcing bars arranged in a grid pattern (Japanese Patent Application Laid-Open No. 2005-259151). No. 2006-283287, FIG. 11). Since much labor is required, there is a demand for a reinforced concrete plate excellent in on-site workability.
JP 2006-283287 A (FIG. 11)

  Accordingly, an object of the present invention is to provide a reinforced concrete plate having a structural reinforcing bar to which shear reinforcement is applied, and capable of easily assembling the structural reinforcing bar at the site and having excellent workability at the site. .

  In order to solve the above problems, the present invention takes the following technical means.

  The invention of claim 1 is a reinforced concrete plate comprising a structural reinforcing bar having a main reinforcing bar and a distribution reinforcing bar and subjected to shear reinforcement, and a concrete placed so as to include the structural reinforcing bar, The structural reinforcing bars are configured by arranging a large number of lattice rebars for main reinforcing bars and a large number of lattice reinforcing bars for distribution reinforcing bars in a grid pattern, and joining the intersecting points intersecting the cross. Each Lattice rebar for main reinforcement is formed in a continuous wave shape so that the compression main reinforcement and the tension main reinforcement arranged in a straight line in a straight line and the compression main reinforcement and the tension main reinforcement are alternately connected. Each of the plurality of lattice reinforcing bars for distribution reinforcing bars, each of which is a linearly arranged compression parallel reinforcing bar and a tensile distribution reinforcing bar. compression It is constituted by a lattice reinforcing bar for a reinforcing bar that is formed in a continuous wave shape and extends so as to alternately connect a reinforcing bar and a tensile strength reinforcing bar, and the plurality of main reinforcing bar lattices and the many The Lattice rebar for the reinforcing bar penetrates the Lattice rebar for the reinforcing bar so that it passes through the opening of the Lattice rebar for each main reinforcing bar through the opening of each Lattice reinforcing bar for the main reinforcing bar. It is a reinforced concrete slab characterized by being arranged so as to intersect with each other in a lattice shape.

  The invention of claim 2 is the reinforced concrete plate according to claim 1, wherein the reinforced concrete plate is used as a floor slab.

  The reinforced concrete plate according to the present invention includes a large number of main reinforcing bar lattice reinforcement bars and a large number of distribution reinforcing bar lattice reinforcement bars. Arrangement of Lattice rebar for distribution bar and Lattice rebar for multiple distribution bars through the opening of each Lattice rebar for main rebar. The structural rebar is configured by intersecting in a lattice shape while penetrating the entire length of the Lattice rebar for the reinforcing bar. Therefore, according to the present invention, a lattice rebar for main reinforcement and a lattice reinforcement for distribution reinforcing steel are manufactured in advance at a factory, and by using these, it is easy to construct a structural reinforcement subjected to shear reinforcement on site. It is possible to provide a reinforced concrete plate having a structural reinforcing bar to which shear reinforcement is applied and having excellent on-site workability.

  Embodiments of the present invention will be described below with reference to the drawings.

  FIG. 1 is a plan view showing a structural reinforcing bar of a reinforced concrete plate according to an embodiment of the present invention.

  The reinforced concrete plate according to the present embodiment is provided with a structural reinforcing bar and a concrete 30 placed so as to include the structural reinforcing bar. As shown in FIG. 1, the structural reinforcing bar of the reinforced concrete plate according to the present embodiment is used for a number of main reinforcing bars extending in one direction (the horizontal direction in FIG. 1 in the illustrated example) in two vertical and horizontal directions orthogonal to each other and parallel to each other. A lattice rebar 10 and a plurality of lattice rebars 20 for power distribution reinforcing bars that extend in the other of the two vertical and horizontal directions (the vertical direction in FIG. 1 in the figure) and are parallel to each other are arranged in a lattice pattern. Each intersection that intersects with is joined by welding.

  FIG. 2 is a front view of the lattice rebar for main reinforcing bars in FIG.

  As shown in FIG. 2, each lattice rebar 10 for main reinforcing bars is composed of an upper compression main reinforcing bar 11 and a lower tensile main reinforcing bar 12 which are linearly arranged in parallel at a predetermined interval in the vertical direction, and this compression main reinforcing bar. 11 and the main reinforcing lattice 13 are formed in a continuous wave shape so as to alternately connect the main reinforcing bars 12 and the tensile reinforcing bars 12.

  And in this embodiment, each top part 13a of the upper side of the main reinforcement lattice 13 is joined to the compression main reinforcement 11 by welding so that it may be located above the compression main reinforcement, and the lower side of the main reinforcement lattice 13 Each of the top portions 13b is joined to the tensile main reinforcing bar 12 by welding so as to be positioned below the tensile main reinforcing bar. In this way, the main rebar latticed rebar 10 is formed by applying shear reinforcement to the main rebars 11 and 12.

  FIG. 3 is a front view of the lattice rebar for the distribution reinforcing bar in FIG. 1.

  As shown in FIG. 3, each of the distribution reinforcing bar lattice bars 20 has an upper compression distributing reinforcing bar 21 and a lower one that are arranged in a straight line in parallel at a required interval narrower than the main reinforcing bar lattice bars 10. It is constituted by a tension distribution reinforcing bar 22 on the side, and a lattice reinforcing bar 23 for the distribution reinforcement formed and extended in a continuous wave shape so as to alternately connect the compression distribution reinforcement 21 and the tension distribution reinforcement 22. .

  In the present embodiment, each of the top portions 23 a on the upper side of the lattice reinforcing bar 23 for the distribution bar is in a state in which the lattice reinforcing bar 23 for the distribution bar is sandwiched between the compression distribution reinforcing bar 21 and the tension distribution bar 22. The compression distribution bar 21 is joined by welding, and the respective top portions 23b on the lower side of the distribution bar lattice 23 are joined to the tension distribution bar 22 by welding. In this way, the lattice rebar 20 for the distribution reinforcing bar is formed by applying shear reinforcement to the distribution reinforcing bars 21 and 22.

  4 is a front view of the structural reinforcing bar of FIG. 1 as viewed from the direction of arrow A, and FIG. 5 is a side view of the structural reinforcing bar of FIG.

  The reinforced concrete plate according to the present embodiment includes a large number of main reinforcing bar lattices 10 and a large number of distributed reinforcing bar lattices 20 as described above. 4 and FIG. 5, the main reinforcing bar lattices 10 are arranged in parallel with each other, and the main reinforcing bar lattices 10 have openings that form a substantially triangular shape. The structural reinforcing bars are configured by intersecting in a lattice shape while passing through the entire length of the lattice reinforcing rebar 20 for the distributing bars so as to pass through.

  Therefore, the main rebar latticed reinforcing bar 10 and the distribution reinforcing bar latticed reinforcing bar 20 are manufactured in advance at the factory, and by using these, it is possible to easily assemble a structural reinforcing bar subjected to shear reinforcement in the field. Therefore, a reinforced concrete plate with shear reinforcement can be easily manufactured. The reinforced concrete plate according to the present invention is suitable as a floor slab.

It is a top view which shows the structural reinforcement of the reinforced concrete plate by one Embodiment of this invention. It is a front view of the lattice rebar for main reinforcing bars in FIG. It is a front view of the lattice rebar for distribution reinforcing bars in FIG. FIG. 2 is a front view of the structural reinforcing bar of FIG. It is a B arrow side view of the structural reinforcing bar of FIG. It is a top view which shows the structural reinforcement of the conventional reinforced concrete board. FIG. 7 is a front view of the structural reinforcing bar of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Lattice reinforcement for main reinforcement 11 ... Compression main reinforcement 12 ... Tensile main reinforcement 13 ... Lattice reinforcement for main reinforcement 20 ... Lattice reinforcement for distribution reinforcement 21 ... Compression distribution reinforcement 22 ... Tension distribution reinforcement 23 ... Lattice for distribution reinforcement Reinforcement 30 ... concrete

Claims (2)

A reinforced concrete slab comprising a main reinforcing bar and a structural reinforcing bar that has a reinforcing bar and is subjected to shear reinforcement, and a concrete that is placed so as to include the structural reinforcing bar,
The structural reinforcing bars are configured by arranging a large number of lattice reinforcing bars for main reinforcing bars and a large number of distributing reinforcing bars for lattice reinforcing bars in a grid pattern, and joining each intersection that intersects the cross,
Each of the large number of lattice rebars for main reinforcing bars is a continuous wave type so that the compression main reinforcing bars and the tensile main reinforcing bars are arranged in parallel in a straight line and the compression main reinforcing bars and the tensile main reinforcing bars are alternately connected. A plurality of lattice reinforcing bars for distribution reinforcing bars, each of which is arranged in a straight line in parallel in the vertical direction and a tension distribution reinforcing bar. And a lattice reinforcing bar for a reinforcing bar which is formed in a continuous wave shape and extends so as to alternately connect the compression distributing bar and the tensile distributing bar,
In addition, the large number of lattice rebars for main reinforcing bars and the large number of lattice reinforcing bars for distribution bars are distributed in such a way that the lattice rebars for main reinforcing bars arranged in parallel pass through the openings of the lattice bars for the main reinforcing bars. The muscle latticed rebar is penetrated over the entire length of the reinforcing muscle latticed rebar, arranged in a grid pattern,
Reinforced concrete version characterized by   The reinforced concrete plate according to claim 1, wherein the reinforced concrete plate is used as a floor slab.

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