FI20185562A1 - Arrangement comprising column and concrete slab supported by the column, and method for obtaining such arrangement - Google Patents

Arrangement comprising column and concrete slab supported by the column, and method for obtaining such arrangement Download PDF

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Publication number
FI20185562A1
FI20185562A1 FI20185562A FI20185562A FI20185562A1 FI 20185562 A1 FI20185562 A1 FI 20185562A1 FI 20185562 A FI20185562 A FI 20185562A FI 20185562 A FI20185562 A FI 20185562A FI 20185562 A1 FI20185562 A1 FI 20185562A1
Authority
FI
Finland
Prior art keywords
reinforcement
concrete slab
column
group
bars
Prior art date
Application number
FI20185562A
Other languages
Finnish (fi)
Swedish (sv)
Inventor
Jan Bujnak
Original Assignee
Peikko Group Oy
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Peikko Group Oy filed Critical Peikko Group Oy
Priority to FI20185562A priority Critical patent/FI20185562A1/en
Priority to PCT/FI2019/050451 priority patent/WO2019243661A1/en
Publication of FI20185562A1 publication Critical patent/FI20185562A1/en

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/01—Reinforcing elements of metal, e.g. with non-structural coatings
    • E04C5/06—Reinforcing elements of metal, e.g. with non-structural coatings of high bending resistance, i.e. of essentially three-dimensional extent, e.g. lattice girders
    • E04C5/0645—Shear reinforcements, e.g. shearheads for floor slabs
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B5/00—Floors; Floor construction with regard to insulation; Connections specially adapted therefor
    • E04B5/43—Floor structures of extraordinary design; Features relating to the elastic stability; Floor structures specially designed for resting on columns only, e.g. mushroom floors
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/01—Reinforcing elements of metal, e.g. with non-structural coatings

Abstract

The disclosure relates to an arrangement comprising a column (1) and a concrete slab (2) supported by the column (1), the concrete slab (2) comprising a first reinforcement mesh (4) and a second reinforcement mesh (5) arranged within the concrete slab (2) parallel in relation to each other and in relation to the upper and the lower surface of the concrete slab (2); vertical reinforcement bars (61) arranged within the concrete slab (2) transversal in relation to concrete slab (2); and a reinforcement member (3) arranged within the concrete slab (2) parallel with the concrete slab (2) between the first reinforcement mesh (4) and the second reinforcement mesh (5), and aligned in the vertical direction directly above the column (1) for providing punching resistance to the concrete slab (2), wherein the reinforcement member (3) comprises a first group (31) and a second group (32); the first group (31) comprises a plurality of steel bars (311) arranged parallel with each other; the second group (32) comprises a plurality of steel bars (321) arranged parallel with each other; the steel bars (311) of the first group (31) are transversal to the steel bars (321) of the second group (32); the steel bars (311) of the first group (31) extend in two directions beyond the column (1) a distance that is at least equal to the thickness of the concrete slab (2); each steel bar (311, 321) is provided with a head (312, 322) at each end of the steel bar (311, 321), wherein the diameter of each head (312, 322) is at least twice the diameter of the body of the corresponding steel bar (311, 321); and the reinforcement member (3) is unattached to the first or second reinforcement mesh (4, 5) or to the vertical reinforcement bars (61). The disclosure relates also to a method for obtaining an arrangement comprising a column (1) and a concrete slab (2) supported by the column (1).

Description

The present disclosure relates to construction elements, and particularly to an 5 arrangement comprising a column and a concrete slab supported by the column. The present disclosure further concerns a method for obtaining an arrangement comprising a column 1 and a concrete slab 2 supported by the column 1.
BACKGROUND OF THE DISCLOSURE
Document KR 20090006512 A discloses a shear reinforcement device for a joint of a slab 10 and a column to prevent the interference problems caused when constructing a joint of a slab and a column effectively, and to prevent the shear failure occurring on a joint of a slab and a column effectively. A shear reinforcement device for a joint of a slab and a column comprises many supports formed to have a hollow parallel to the direction of a column, an upper through hole and a lower through hole on the upper and lower sides and installed 15 continuously to be located parallel to the column in a slab, an upper bar coupled through the upper through hole of the supports installed continuously and installed perpendicular to the column in the slab, and a lower bar coupled through the lower through hole of the support installed continuously and installed perpendicular to the column in the slab.
Document DE 3523656 A1 discloses a shear reinforcement system for area-covering 20 structural elements, which can be transported in a space-saving manner, consists of a group of mutually identical, grid-type, ladder-type or framework-type individual elements which are bent in a V-shape so that they can be fitted one inside the other for transportation and, when fitted together, remain in an upright position without special measures. These individual elements are arranged on an area-covering reinforcement corresponding to the 25 requirements of the shear covering, e.g. axisymmetrically above a column.
Document JP 2002242300 A discloses a connecting method requiring no connecting work of a beam connecting lower end reinforcement in a narrow beam-column joint part space surrounded and locked by the end face of a concrete part and having multiple column main reinforcements stood densely while allowing use of a non-timbering construction method 30 in connection between precast concrete beams linearly facing each other for improving workability and facilitating hanging work of a precast concrete beam. In concrete parts 2 in the mutually opposed end parts of both precast concrete beams 1, a plurality of slits 5 opened to the upper face and the end face in the concrete part are formed. In each of the slits 5 having a depth reaching the beam lower end reinforcement level, a lateral wide part 35 5a is formed in the end part. A reinforcement 8 having a knob engaged with the lateral
20185562 prh 21 -06- 2018 wide part is dropped into the facing slit, and concrete 10 for the beam upper part and the beam-column joint part is placed after a beam upper end reinforcement 9 is arranged in the upper parts of both precast concrete beams.
In the traditional reinforcement systems, the horizontal reinforcement bars anchor forces from vertical reinforcement bars into concrete. Thus, the horizontal reinforcement bars need to be physically attached to the vertical reinforcement bars in order to transmit forces from the vertical reinforcement bars to the horizontal reinforcement bars. In these reinforcement systems, thin (approximately 6 to 12 mm) horizontal reinforcement bars are used to anchor vertical reinforcement bars into the concrete. The purpose of the vertical 10 reinforcement bars is to support the slab while the horizontal reinforcement bars are providing interaction between vertical bars and concrete. Because of the requirement of the attachment between the horizontal reinforcement bars and the vertical reinforcement bars, the structure is more complicated to install.
BRIEF DESCRIPTION OF THE DISCLOSURE
An object of the present disclosure is to provide an arrangement and a method so as to solve the above problem.
The object of the disclosure is achieved by an arrangement and a method which are characterized by what is stated in the independent claims. The preferred embodiments of the disclosure are disclosed in the dependent claims.
The disclosure is based on the idea of providing a concrete slab supported by a column, and comprising two reinforcement meshes and vertical reinforcement bars, with a reinforcement member that is aligned in the vertical direction directly above the column parallel with the concrete slab. The reinforcement member comprises two groups of steel bars arranged transversally in relation to each other. Each steel bar is provided with a head 25 at each end of the steel bar. The reinforcement member is unattached to either of the reinforcement meshes or to the vertical reinforcement bars.
The reinforcement member of the disclosure work independently from any possible vertical reinforcing profiles in the concrete slab. In other words, the reinforcement member can be combined with any type of vertical reinforcement profiles. The reinforcement member does 30 not need to be physically attached to the vertical profiles. The structural function of the reinforcement member is that it accommodates forces that cannot be carried by the vertical reinforcement. The steel bars of the reinforcement member bear forces from the concrete slab directly and transmit them into the column. Thus, the reinforcement member does not
20185562 prh 21 -06- 2018 need to be connected to possible vertical reinforcement bars. This makes the structure simpler and thus easier to construct.
BRIEF DESCRIPTION OF THE DRAWINGS
In the following the disclosure will be described in greater detail by means of preferred embodiments with reference to the accompanying drawings, in which
Figure 1 is a schematic cross-sectional top view of an arrangement according to an embodiment of the disclosure; and
Figure 2 is a schematic cross-sectional side view of an arrangement according to an embodiment of the disclosure.
DETAILED DESCRIPTION OF THE DISCLOSURE
Arrangement
The disclosure relates to an arrangement comprising a column 1 and a concrete slab 2 supported by the column 1. The concrete slab 2 refers to a reinforced concrete slab. For example, the column 1 is a reinforced concrete column or a steel column.
The concrete slab 2 comprises a first reinforcement mesh 4 and a second reinforcement mesh 5 arranged within the concrete slab 2 parallel in relation to each other and in relation to the upper and the lower surface of the concrete slab 2. Preferably, each reinforcement mesh 4, 5 is formed by lateral 41,51 and longitudinal 42, 52 reinforcement bars.
The concrete slab 2 comprises vertical reinforcement bars 61 arranged within the concrete 20 slab 2 transversal in relation to concrete slab 2. For example, the vertical reinforcement bars 61 are provided by a vertical reinforcement member 6 comprising the vertical reinforcement bars 61 and an elongated assembly profile 62 in which the vertical reinforcement bars 61 are attached. According to an embodiment, the vertical reinforcement bars 61 are arranged within the concrete slab 2 outside the projection of the 25 column 1 in the direction parallel to the column 1. In other words, the vertical reinforcement bars 61 are not arranged above the column 1.
The concrete slab 2 comprises a reinforcement member 3. The reinforcement member 3 is arranged within the concrete slab 2 parallel with the concrete slab 2 between the first reinforcement mesh 4 and the second reinforcement mesh 5. The reinforcement member 30 3 is aligned in the vertical direction directly above the column 1 for providing punching resistance to the concrete slab 2. The reinforcement member 3 is unattached to the first or second reinforcement mesh 4, 5 or to the vertical reinforcement bars 61. In other words, the reinforcement member 3 is not directly attached, such as welded, to other
20185562 prh 21 -06- 2018 reinforcements within the concrete slab 2. The reinforcement member 3 comprises a first group 31 and a second group 32.
The first group 31 comprises a plurality of steel bars 311 arranged parallel with each other. Preferably, the steel bars 311 are spaced evenly apart from each other. According to an embodiment, the steel bars 311 are attached to each other in order to ease the installation of the steel bars 311 within the concrete slab 2.
The second group 32 comprises a plurality of steel bars 321 arranged parallel with each other. Preferably, the steel bars 321 are spaced evenly apart from each other. According to an embodiment, the steel bars 321 are attached to each other in order to ease the 10 installation of the steel bars 321 within the concrete slab 2.
The steel bars 311 of the first group 31 are transversal to the steel bars 321 of the second group 32. According to an embodiment, the steel bars 311 of the first group 31 are in contact with the steel bars 321 of the second group 32. For example, the steel bars 311 of the first group 31 are attached to the steel bars 321 of the second group 32. According to 15 an alternative embodiment, the steel bars 311 of the first group 31 are arranged at a distance from the steel bars 321 of the second group 32. According to an embodiment, the first group 31 comprises at least two steel bars 311 and the second group 32 comprises at least two steel bars 321.
The steel bars 311 of the first group 31 extend in two directions beyond the column 1 a 20 distance that is at least equal to the thickness of the concrete slab 2. Preferably, the steel bars 321 of the second group 32 also extend in two directions beyond the column 1 a distance that is at least equal to the thickness of the concrete slab 2.
Each steel bar 311,321 is provided with a head 312, 322 at each end of the steel bar 311, 321, wherein the diameter of each head 312, 322 is at least twice the diameter of the body 25 of the corresponding steel bar 311,321. According to an embodiment, the diameter of the body of each one of the steel bars 311,321 is 2 to 4 cm.
Method
The disclosure relates to a method for obtaining an arrangement comprising a column 1 and a concrete slab 2 supported by the column 1. The concrete slab 2 refers to a reinforced 30 concrete slab. For example, the column 1 is a reinforced concrete column or a steel column.
The method comprises a first providing step for providing a column 1. For example, the column 1 is provided by casting the column on the construction site. Alternatively, the column 1 is provided as a precast element.
20185562 prh 21 -06- 2018
The method comprises a second providing step for providing a first reinforcement mesh 4 on top of the column 1. Preferably, the first reinforcement mesh 4 is formed by lateral 41 and longitudinal 42 reinforcement bars.
The method comprises a third providing step for providing vertical reinforcement bars 61 arranged transversally in relation to the first reinforcement mesh 4. For example, the vertical reinforcement bars 61 are provided by a vertical reinforcement member 6 comprising the vertical reinforcement bars 61 and an elongated assembly profile 62 in which the vertical reinforcement bars 61 are attached. According to an embodiment, the vertical reinforcement bars 61 are provided outside the projection of the column 1 in the 10 direction parallel to the column 1. In other words, the vertical reinforcement bars 61 are not arranged above the column 1.
The method comprises a fourth providing step for providing a reinforcement member 3 arranged parallel with the first reinforcement mesh 4 and aligned in the vertical direction directly above the column 1 for providing punching resistance to the concrete slab 2. The 15 reinforcement member 3 comprises a first group 31 and a second group 32.
The first group 31 comprises a plurality of steel bars 311 arranged parallel with each other. Preferably, the steel bars 311 are spaced evenly apart from each other. According to an embodiment, the steel bars 311 are attached to each other in order to ease the installation of the steel bars 311 within the concrete slab 2.
The second group 32 comprises a plurality of steel bars 321 arranged parallel with each other. Preferably, the steel bars 321 are spaced evenly apart from each other. According to an embodiment, the steel bars 321 are attached to each other in order to ease the installation of the steel bars 321 within the concrete slab 2.
The steel bars 311 of the first group 31 are transversal to the steel bars 321 of the second 25 group 32. According to an embodiment, the steel bars 311 of the first group 31 are in contact with the steel bars 321 of the second group 32. For example, the steel bars 311 of the first group 31 are attached to the steel bars 321 of the second group 32. According to an alternative embodiment, the steel bars 311 of the first group 31 are arranged at a distance from the steel bars 321 of the second group 32. According to an embodiment, the 30 first group 31 comprises at least two steel bars 311 and the second group 32 comprises at least two steel bars 321.
The steel bars 311 of the first group 31 extend in two directions beyond the column 1 a distance that is at least equal to the thickness of the concrete slab 2. Preferably, the steel bars 321 of the second group 32also extend in two directions beyond the column 1 a distance that is at least equal to the thickness of the concrete slab 2.
Each steel bar 311,321 is provided with a head 312, 322 at each end of the steel bar 311, 321, wherein the diameter of each head 312, 322 is at least twice the diameter of the body of the corresponding steel bar 311,321. According to an embodiment, the diameter of the body of each one of the steel bars 311,321 is 2 to 4 cm.
The method comprises a fifth providing step for providing a second reinforcement mesh 5 on top of the column 1 so that the second reinforcement mesh 5 is parallel with the first reinforcement mesh 4, and that the reinforcement member 3 is arranged between the first 10 reinforcement mesh 4 and the second reinforcement mesh 5. Preferably, the second reinforcement mesh 5 is formed by lateral 51 and longitudinal 52 reinforcement bars.
The reinforcement member 3 is unattached to the first or second reinforcement mesh 4, 5 or to the vertical reinforcement bars 61. In other words, the reinforcement member 3 is not directly attached, such as welded, to other reinforcements within the concrete slab 2.
The method comprises a casting step for casting concrete over the first reinforcement mesh 4, the vertical reinforcement bars 61, the reinforcement member 3 and the second reinforcement mesh 5 for forming the concrete slab 2 enclosing the first reinforcement mesh 4, the vertical reinforcement bars 61, the reinforcement member 3 and the second reinforcement mesh 5 so that the first reinforcement mesh 4 and the second reinforcement mesh 5 are parallel in relation to the upper and the lower surface of the concrete slab 2.
Preferably, the casting step is performed at the construction site.

Claims (4)

1. An arrangement comprising a column (1) and a concrete slab (2) supported by the column (1), the concrete slab (2) comprising
- a first reinforcement mesh (4) and a second reinforcement mesh (5) arranged
5 within the concrete slab (2) parallel in relation to each other and in relation to the upper and the lower surface of the concrete slab (2); and
- vertical reinforcement bars (61) arranged within the concrete slab (2) transversal in relation to concrete slab (2);
characterized in that
10 the concrete slab (2) comprises a reinforcement member (3) arranged within the concrete slab (2) parallel with the concrete slab (2) between the first reinforcement mesh (4) and the second reinforcement mesh (5), and aligned in the vertical direction directly above the column (1) for providing punching resistance to the concrete slab (2);
15 the reinforcement member (3) comprises a first group (31) and a second group (32);
the first group (31) comprises a plurality of steel bars (311) arranged parallel with each other;
the second group (32) comprises a plurality of steel bars (321) arranged parallel with each other;
20 the steel bars (311) of the first group (31) are transversal to the steel bars (321) of the second group (32);
the steel bars (311) of the first group (31) extend in two directions beyond the column (1) a distance that is at least equal to the thickness of the concrete slab (2);
each steel bar (311, 321) is provided with a head (312, 322) at each end of the steel
25 bar (311, 321), wherein the diameter of each head (312, 322) is at least twice the diameter of the body of the corresponding steel bar (311,321); and the reinforcement member (3) is unattached to the first or second reinforcement mesh (4, 5) or to the vertical reinforcement bars (61).
2. An arrangement according to claim 1, characterized in that the diameter of the body
30 of each one of the steel bars (311,321) is 2 to 4 cm.
20185562 prh 21 -06- 2018
3. A method for obtaining an arrangement comprising a column (1) and a concrete slab (2) supported by the column (1), comprising:
- a first providing step for providing a column (1);
a second providing step for providing a first reinforcement mesh (4) on top of the 5 column (1); and
- a third providing step for providing vertical reinforcement bars (61) arranged transversally in relation to the first reinforcement mesh (4);
characterized in that the method comprises:
- a fourth providing step for providing a reinforcement member (3) arranged parallel
10 with the first reinforcement mesh (4) and aligned in the vertical direction directly above the column (1) for providing punching resistance to the concrete slab (2);
- a fifth providing step for providing a second reinforcement mesh (5) on top of the column (1) so that the second reinforcement mesh (5) is parallel with the first reinforcement mesh (4) and that the reinforcement member (3) is arranged
15 between the first reinforcement mesh (4) and the second reinforcement mesh (5);
and
- a casting step for casting concrete over the first reinforcement mesh (4), the vertical reinforcement bars (61), the reinforcement member (3) and the second reinforcement mesh (5) for forming the concrete slab (2) enclosing the first
20 reinforcement mesh (4), the vertical reinforcement bars (61), the reinforcement member (3) and the second reinforcement mesh (5) so that the first reinforcement mesh (4) and the second reinforcement mesh (5) are parallel in relation to the upper and the lower surface of the concrete slab (2), wherein
25 the reinforcement member (3) comprises a first group (31) and a second group (32);
the first group (31) comprises a plurality of steel bars (311) arranged parallel with each other;
the second group (32) comprises a plurality of steel bars (321) arranged parallel with each other;
30 the steel bars (311) of the first group (31) are transversal to the steel bars (321) of the second group (32);
the steel bars (311) of the first group (31) extend in two directions beyond the column (1) a distance that is at least equal to the thickness of the concrete slab (2);
each steel bar (311, 321) is provided with a head (312, 322) at each end of the steel bar (311, 321), wherein the diameter of each head (312, 322) is at least twice the diameter of the body of the corresponding steel bar (311,321); and the reinforcement member (3) is unattached to the first or second reinforcement mesh 5 (4, 5) or to the vertical reinforcement bars (61).
4. A method according to claim 3, characterized in that the diameter of the body of each one of the steel bars (311,321) is 2 to 4 cm.
FI20185562A 2018-06-21 2018-06-21 Arrangement comprising column and concrete slab supported by the column, and method for obtaining such arrangement FI20185562A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
FI20185562A FI20185562A1 (en) 2018-06-21 2018-06-21 Arrangement comprising column and concrete slab supported by the column, and method for obtaining such arrangement
PCT/FI2019/050451 WO2019243661A1 (en) 2018-06-21 2019-06-11 Arrangement comprising column and concrete slab supported by the column, and method for obtaining such arrangement

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FI20185562A FI20185562A1 (en) 2018-06-21 2018-06-21 Arrangement comprising column and concrete slab supported by the column, and method for obtaining such arrangement

Publications (1)

Publication Number Publication Date
FI20185562A1 true FI20185562A1 (en) 2019-12-22

Family

ID=67107469

Family Applications (1)

Application Number Title Priority Date Filing Date
FI20185562A FI20185562A1 (en) 2018-06-21 2018-06-21 Arrangement comprising column and concrete slab supported by the column, and method for obtaining such arrangement

Country Status (2)

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FI (1) FI20185562A1 (en)
WO (1) WO2019243661A1 (en)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT382188B (en) 1984-07-24 1987-01-26 Avi Alpenlaendische Vered SHOE REINFORCEMENT SYSTEM FOR SURFACE STRUCTURES
JPH0654042B2 (en) * 1987-10-07 1994-07-20 清水建設株式会社 Shear Reinforcement Structure of Shear Head in Flat Plate Structure Building
JP4676624B2 (en) 2001-02-13 2011-04-27 株式会社竹中工務店 Connection method of precast concrete beams in column beam joints
KR100676627B1 (en) * 2005-07-04 2007-02-01 재단법인서울대학교산학협력재단 Shear reinforcement device arranged in the slab-column connection and the shear reinforcement structure using the device
KR20090006512A (en) 2007-07-12 2009-01-15 (주)화인테크 Shear reinforcement device for junctional region of slab and column
CN203022193U (en) * 2012-09-07 2013-06-26 华侨大学 Well type frame beam strengthened flat slab connecting structure

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WO2019243661A1 (en) 2019-12-26

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