GOST R 57357-2016
GOST R 57357−2016/EN 10080:2005 Steel for reinforcement of concrete structures. Specifications
GOST R 57357−2016/EN 10080:2005
NATIONAL STANDARD OF THE RUSSIAN FEDERATION
STEEL FOR REINFORCEMENT OF CONCRETE STRUCTURES
Specifications
Steel for reinforcement of concrete structures. Specifications
OKS 91.080.40
Date of introduction 2017−07−01
Preface
1 PREPARED by the Central scientific-research, design and technological Institute of concrete and reinforced concrete named after A. A. Gvozdev (NIIZHB them… Gvozdeva), branch of Joint stock company «Scientific research centre «Construction» (JSC «SIC «Construction») on the basis of the official translation into Russian language of the English version specified in paragraph 4 of European standard, which is the Federal state unitary enterprise «Russian scientific research information centre on standardization, Metrology and conformity assessment» (FGUP «STANDARTINFORM»)
2 SUBMITTED by the Technical Committee for standardization TC 465 «Construction"
3 APPROVED AND put INTO EFFECT by the Federal Agency for technical regulation and Metrology of December 13, 2016 2027 N-St
4 this standard is identical to European standard EN 10080:2005* «Steel for concrete reinforcement. Steel reinforcing is weldable. Basic provisions» (EN 10080:2005 «Steel for the reinforcement of concrete — Weldable reinforcing steel — General», IDT).
________________
* Access to international and foreign documents referred to here and hereinafter, can be obtained by clicking on the link to the site shop.cntd.ru. — Note the manufacturer’s database.
The name of this standard changed with respect to the names specified in the European standard for compliance with GOST R 1.5 (3.5).
In application of this standard should be used instead of reference European standards with corresponding national and international standards, details of which are given in Appendix YES
5 INTRODUCED FOR THE FIRST TIME
Rules for the application of this standard is established in article 26 of the Federal law from June 29, 2015 N 162-FZ «On standardization in Russian Federation». Information about the changes to this standard is published in the annual (as of January 1 of the current year) reference index «National standards» and the official text changes and amendments — in monthly information index «National standards». In case of revision (replacement) or cancellation of this standard a notification will be published in the monthly information index «National standards». Relevant information, notification and lyrics are also posted in the information system of General use — on the official website of the Federal Agency for technical regulation and Metrology on the Internet (www.gost.ru)
1 Scope
1.1 this standard specifies General requirements and definitions operational characteristics of the steel reinforcement, suitable for welding, which is used for reinforcement of concrete structures, delivered as finished products:
— bars, coils (rod, wire) and unwound products;
— meshes are automatically welded in the factory;
spatial frames.
1.2 Steel, corresponding to the present standard, is corrugated periodically profiled or smooth surface.
1.3 this standard does not apply
— steel rebar, are not suitable for welding;
— galvanized steel reinforcement;
— steel rebar with epoxy coating;
— steel rebar resistant to corrosion;
— pre-tense valve (see pr 10138−1 YONG — YEON pr 10138−4);
— periodically profiled strip;
— further processing, e.g. cutting or cutting and bending.
1.4 this standard does not determine technical classes. Technical classes should be determined in accordance with this standard at the established values for R, A
, R
/R
and R
/R
(if applicable), fatigue strength (when needed), flexibility, weldability, Flexural strength, strength of welded or clamped joints (for welded wire mesh or space frames) and tolerances on dimensions.
2 Normative references
For the application of this standard requires the following referenced documents*. For dated references, only use the specified edition of the referenced document, for undated references, the latest edition of the referenced document (including all revisions).
________________
* The table of conformity of national standards international see the link. — Note the manufacturer’s database.
EN 10020:2000, Definition and classification of grades of steel (Definition and classification of grades of steel)
EN 10079:1992, Definition of steel products (steel Products. Definitions)
________________
Cancelled. Acts YONG 10079:2007.
EN ISO 377, Steel and steel products — Location and preparation of samples and test pieces for mechanical testing (Steel and steel products. Location and preparation of test specimens and samples for mechanical testing)
EN ISO 7500−1, Metallic materials — Verification of static uniaxial testing machines — Tension/compression testing machines. Verification and calibration of the force — measuring system (Materials metal. Testing machines for static uniaxial tests. Testing machine tensile/compression. Validation and calibration system of force measurement)
________________
Cancelled. Valid EN ISO 7500−1:2016, based on ISO 7500−1:2015.
EN ISO 15630−1, Steel for the reinforcement and prestressing of concrete — Test methods — Part 1: Reinforcing bar, wire rod and wire (Steel for the reinforcement and creation of pre-stress concrete. Test methods. Part 1. Reinforcing bars, wire rod and wire)
________________
Cancelled. Valid EN ISO 15630−1:2011, prepared on the basis of ISO 15630−1:2010.
EN ISO 15630−2, Steel for the reinforcement and prestressing of concrete — Test methods — Part 2: Welded fabric (Steel for reinforcement and pre-stressing of concrete. Test methods. Part 2. Weldment)
________________
Cancelled. Valid EN ISO 15630−2:2011, prepared on the basis of ISO 15630−2:2010.
3 Terms and definitions
This standard applies the terminology according to EN 10020:2000 and EN 10079:1992 and the following terms with respective definitions:
3.1 reinforcing steel (reinforcing steel): Steel product of circular or approximately circular cross-section, used for the reinforcement of concrete.
3.2 corrugated reinforcing steel (ribbed reinforcing steel): Steel reinforcement having at least two rows of transverse ribs, which are evenly distributed along the entire length.
3.3 longitudinal edge (longitudinal rib): the uniform continuous protrusion parallel to the axis of the rod, wire or wire.
3.4 cross rib (transverse rib): Any edge on the surface of the rod, wire, or wire that is not longitudinal.
3.5 the height of the slab h (rib height, h): the Distance from the highest point of the longitudinal or transverse rib to the surface of the nucleus, measured perpendicularly to the axis of the rod, wire or wire.
3.6 the distance between the ribs or dents with (rib or indentation spacing, with): the Distance between the centres of two consecutive transverse ribs, or two consecutive indentations measured parallel to the axis of the rod, wire or wire.
3.7 the angle of inclination of transverse ribs or indentations (angle of transverse rib or indentation inclination,
): the angle between the axis of the transverse ribs or indentations and the longitudinal axis of the rod, wire or wire.
3.8 the flank angle of the cross ribs (transverse rib flank inclination,
): Angle the sides of the ribs, measured perpendicular to the longitudinal axis of the rib.
3.9 relative area of the ribs (relative rib area
): the area of the projection of all ribs on a plane perpendicular to the longitudinal axis of the rod, wire rod or wire, divided by the distance between the ribs and the nominal perimeter.
3.10 profiled reinforcement steel (indented reinforcing steel) Reinforcing steel evenly spaced throughout the length of the dents (recesses).
3.11 the depth of the indentation t (indentation depth, t): the distance from the wire surface to the maximum depth point.
3.12 indentation width, b (indentation width, b): Width of the dent, measured parallel to the axis of the rod, wire or wire.
3.13 smooth steel rebar (plain reinforcing steel): Steel reinforcement with a smooth surface.
3.14 skein (rebellion) (coil): the Reinforcing steel of a certain length (usually rod or wire), wound in concentric turns.
3.15 unwound products (de-coiled product): Reinforcing steel manufactured in coils (coils) and subsequently straightened for further use.
3.16 nominal cross-sectional area A(nominal cross-sectional area, A
): the cross-sectional Area equal to the area of a round smooth bar with the same nominal diameter d.
3.17 reinforcement mesh (welded fabric): a Flat product of the longitudinal and transverse rods, wire or wires of the same or different nominal diameter and length, which are located to each other mostly at right angles and welded together at all points of intersection by resistance welding.
3.18 the spatial structure (lattice girder): a Two — or three-dimensional metal structure, consisting of an upper belt, one or more lower chords and continuous or discontinuous struts connected to the belt by welding or mechanical means.
3.19 standard value (characteristic value): the value of the index of material or product, do not achieve a specified probability in a hypothetical unlimited test series.
__________________
Typically, this value is a special quantile of the statistical distribution of acceptable specific properties of the material or product.
3.20 the minimum value (minimum value): the Value below which not allowed any one test result.
3.21 maximum value (Maxim value)*: the Value above which is not permitted in any test result.
________________
* The text of the document matches the original. — Note the manufacturer’s database.
3.22 batch (batch): a Certain number of bars, wire rod, wire or unwound products of the same nominal diameter and same bottoms, in rolls or in bars, or any number of reinforcing mesh or the spatial frames of the same type from the same manufacturer, which are presented for study simultaneously.
3.23 the factory production control (factory production control): Permanent internal control of products manufactured by the manufacturer.
3.24 the semi-finished product (blank) (semi-finished product): a Product requiring further processing for obtaining standard and special properties established in this standard for reinforcing steel.
3.25 standard rate (standard property): Indicator, regulated in this document and defined in the framework of the factory production control for each of the test units.
3.26 special rate (special property): the value set by this document and is not to be determined in the framework of the factory production control for each of the test units.
3.27 standard reinforcing mesh (standard welded fabric): mesh Reinforcement, manufactured according to the established terms of delivery and available.
3.28 reinforcement mesh target destination (purpose made welded fabric): mesh Reinforcement, manufactured according to special customer requirements.
3.29 longitudinal wire (longitudinal wire): the Reinforcing steel along the direction of reinforcing mesh.
3.30 transverse wire (transverse wire): the Reinforcing steel, placed perpendicular to the direction of the reinforcing mesh.
3.31 dual wire (twin ports): for Two wires of the same technical grade and nominal diameter, located close to each other.
3.32 step reinforcement mesh (pitch of welded fabric): the Distance between the axes of the wire reinforcing mesh.
__________________
A reinforcing mesh with double wire pitch is measured between the tangents of neighboring wires.
3.33 the projection mesh, u, u
, u
, u
(overhang of welded fabric, u
, u
, u
, u
): Length of the free ends of the longitudinal or transverse wires projecting beyond the centre to the extreme cross wire mesh
.
__________________
A reinforcing mesh with double wire protrusion is measured from the tangent line of neighboring wires.
3.34 the length of the reinforcing grid L (length of a welded fabric sheet, L): the Size of the side length of the reinforcement grid, regardless of the direction of manufacture.
3.35 the width of the reinforcing mesh In (width of a welded fabric sheet, In): the Size of the shortest side of a mesh, regardless of the direction of manufacture.
3.36 the standard spatial frame (standard lattice girder): space frame manufactured in accordance with the established delivery conditions and available.
3.37 the spatial structure of the target destination (purpose made lattice girder): a Spatial frame, made by special requirements of the consumer.
3.38 the lower zone (lower chord): a Set of longitudinal steel reinforcement, located in the lower part of the spatial framework.
3.39 the upper zone (upper chord): Longitudinal reinforcement, located in the upper part of the spatial frame made of reinforcing steel or steel strip.
3.40 braces (diagonals): Steel rebar connecting the upper and lower zone of the spatial framework.
3.41 the length of the space frame L (lattice girder length, L): Total length of the spatial framework.
3.42 the estimated height of the spatial framework of N(design height of a lattice girder, H
): the Distance between the lowest point of the bottom belt and the highest point of the upper belt.
3.43 the total height of the spatial framework H(overall height of a lattice girder, H
): the Distance between the lowest and the highest point of the spatial framework.
3.44 the projection of the spatial framework u, u
(lattice girder overhang, u
, u
): The length of the braces within either the upper zone (u
) or lower zone (u
).
3.45 the estimated width of the spatial framework In(design width of a lattice girder, In
): the Distance between the outer points of the lower zones.
3.46 overall width of the spatial framework In(overall width of a lattice girder, B
): the Distance between the outer points of the spatial framework.
3.47 step braces P(pitch of diagonals, P
): the Distance between identical successive points of connection of the braces with belts.
3.48 the angle of inclination of the braces, (angle of inclination of diagonals,
): the angle between the axis of the bracing and the longitudinal axis of the spatial frame in the plane of bracing at mid-height of the spatial framework.
3.49 technical class (technical class): the Type of steel reinforcement defined by its performance characteristics, identified by a special designation (number) of the product.
3.50 grade reinforcing steel (reinforcing steel grade): steel Grade, certain requirements to its yield strength and ductility.
4 Denote
Notation used in this standard are given in table 1.
Note — Comparison of symbols used in this standard, the designations used in YONG 1992−1-1 and EN 1992−1-2, see Appendix E.
Table 1 — List of symbols
| Marking |
Description | Unit |
And |
Nominal cross-sectional area | mm |
And |
The total percentage elongation at maximum force | % |
| b |
The width of the dents | mm |
| with |
The distance between the transverse riffles or dents | mm |
With |
The value of the carbon equivalent (CEV) | % by weight |
With |
Set characteristic value | |
| d |
Nominal diameter of steel reinforcement | mm |
| e |
The gap between the rows of ribs or dents | mm |
| The relative area of the slab | - | |
| The relative area of the dent | - | |
| h |
The height of the slab | mm |
| k |
Coefficient as a function of the number of test results | - |
| The average value of test results | ||
R |
Yield strength | MPa |
R |
The upper yield strength | MPa |
R |
The limit of the tensile strength | MPa |
R |
The ratio of tensile strength to yield strength | - |
R |
Yield strength, disproportionate stretching | MPa |
| s | The estimate of the standard deviation | |
| The angle of the side surface of the cross slab | ||
| The angle of inclination of transverse ribs or indentations | ||
2 |
The stress range under uniaxial fatigue testing | MPa |
| Set the maximum stress at the fatigue test |
MPa | |
| In |
The length of the transverse wires into reinforcing mesh |
mm |
d |
The diameter of the transverse wires into reinforcing mesh | mm |
d |
The diameter of the transverse wires into reinforcing mesh | mm |
| L |
Length of longitudinal wire of the grid or space frame | mm |
N |
The number of transverse wires into reinforcing mesh | - |
N |
The number of longitudinal wires in the mesh reinforcement | - |
P |
Step transverse wires into reinforcing mesh | mm |
P |
The step of the longitudinal wires in the mesh reinforcement | mm |
F |
Shear force of welded joints in reinforcing the grid | kN |
R |
The real value of the yield strength | MPa |
R |
The set value of the yield strength | MPa |
R |
The ratio actual value of yield strength the specified yield strength of |
- |
a |
Increment (specified in the product specification) | |
u |
The projection of the longitudinal wire reinforcing mesh or the length of the diagonals beyond the upper or lower zone of the spatial framework |
mm |
u |
The projection of the transverse wires into reinforcing mesh | mm |
A |
The cross-sectional area of the belt | mm |
A |
The cross-sectional area of the bracing | mm |
B |
The estimated width of the spatial framework | mm |
B |
The total width of the spatial framework | mm |
F |
The shear force of the clamped connection in the spatial frame | kN |
F |
The shear force of a single suture in the spatial frame | kN |
H |
The estimated height of the spatial framework | mm |
H |
The total height of the spatial framework | mm |
P |
Step braces of the spatial framework | vм* |
| ___________________ * The text of the document matches the original. — Note the manufacturer’s database. | ||
R |
The yield zone of the spatial framework | MPa |
R |
The yield strength of the bracing of the spatial framework | MPa |
| t |
The depth of the dents | mm |
t |
The thickness of the steel strip in the spatial frame | mm |
| The inclination of the braces to the spatial frame | ||
| b | The width of the sample-beams (beam test) |
mm |
d |
Bending diameter (beam test) | mm |
F |
The total force applied (beam test) | kN |
F |
The force of the tension (test by pulling) | kN |
| The average value of concrete strength (test by pulling) | MPa | |
| Given value of the strength class of concrete (beam test) the test pulling) |
MPa | |
F |
Stress in the loop, the rod or wire (beam test) | kN |
V |
Loading rate (test by pulling) | N/a |
| Slide (test by pulling) | mm | |
| The tension in the rod or wire (beam test) | MPa | |
| A tension clutch (test samples-cross) | MPa | |
| The voltage coupling at maximum force (beam test) |
MPa | |
| A tension clutch (test by pulling) | MPa | |
|
Voltage to the clutch when sliding of 0.01, 0.1 and 1 mm (beam test) |
MPa |
| ||
5 the symbol
5.1 Rod, a coil or unwound product
Products covered by this standard shall be identified by bringing the following information:
— a description of the shape of the product (i.e. the rod, a coil or unwound product);
— the designation of this standard;
— the nominal size of the product;
— technical class.
5.2 Reinforcement mesh
Mesh reinforcement shall be bringing the following information:
— a description of the shape of the product (reinforcement mesh);
— the designation of this standard;
— nominal size of the product (dimensions of the wires, dimensions of leaves, size of leaves, pitch of wires, protrusion);
technical grade (s) steel (s).
Mesh reinforcement purpose may be described in accordance with the data shown in figure 1, or by drawing with all dimensions and must be identified by the reference user.
N — number of longitudinal wires; P
— pitch of the longitudinal wires; d
is the diameter of the longitudinal wires.
Figure 1 — Geometric characteristics of the mesh the target destination
Nis the number of transverse wires; R
— step cross wires; d
is the diameter of the transverse wires; L — length of longitudinal wire; In — length of the cross wire; u
— the projection of the longitudinal wires; u
— the projection of the longitudinal wires; u
— projection of the transverse wires; u
— projection of the transverse wires
Figure 1 — Geometric characteristics of the mesh the target destination
5.3 Spatial frames
5.3.1 Spatial frames (see figure 2) should be indicated by bringing the following information:
— marking of product form and/or name of the product (spatial frame);
— the designation of this standard;
— the design height of the spatial framework;
— the nominal dimensions of the upper belt, brace and the lower belt;
technical grade (s) become (s) the top chord, diagonals and bottom chord.
5.3.2 Spatial frames can be described according to the instructions in figure 2, or by drawing with all dimensions and must be identified by the reference user.
Figure 2 — Height (N (1), N (2)), width (In (1), (2)), tab (u (1) u (2)) and step braces (P (s)) of the spatial framework
1 — the upper zone; 2 — strut; 3 — lower belt
Figure 2 — Height (N, N
), width (In
, In
), lip (u
, u
) and step braces (P
) to the space frame
6 the Process of steel production and processing
6.1 the Processes of melting and the type of deoxidation of steel performs at the discretion of the manufacturer of the reinforcing steel.
6.2 processing of products in reels and rods perform at the discretion of the manufacturer and misleading to the consumer on demand.
6.3 the Unwinding of material rolls should be done on specialized machines.
6.4 Fabrication of steel reinforcement by subsequent rolling finished products (e.g. sheet or rails) is not permitted.
6.5 All welded wire mesh shall be fabricated in factory conditions for welding machines. All connections in the intersections of longitudinal and transverse wires shall be made by resistance welding to provide the specified shear resistance.
Reinforcement mesh in different directions can be composed of elements of various technical classes.
Dual reinforcement mesh should be composed of twin wires in one direction only.
6.6 All spatial frameworks must be manufactured in the factory and can be made from rods and wires or strips (for upper belts). The connection between the belts and braces must be performed by resistance welding or mechanical clamp to provide the specified shear resistance.
7 Operational characteristics
7.1 Weldability and chemical composition
7.1.1 Weldability is determined by the following characteristics:
— carbon equivalent;
— restrict certain items.
7.1.2 Maximum values for the individual elements and the carbon equivalent shall not exceed the values given in table 2.
Table 2 — Chemical composition
| Analysis | Mass fraction of elements, %, not more | The value of carbon equivalent, With | ||||
Carbon |
Sulfur | Phosphorus | Nitrogen |
Copper | ||
| Analysis of melting |
0,22 | 0,050 | 0,050 | 0,012 | 0,80 | 0,50 |
| Analysis of the product |
0,24 | 0,055 | 0,055 | 0,014 | 0,85 | 0,52 |
| ||||||
7.1.3 the value of the carbon equivalentcalculated by the following formula:
where the symbols of the chemical elements indicate their percentage by weight (see EN ISO 17660).
7.1.4 Durability of products provided by the chemical composition set out in table 2.
7.2 Mechanical properties
7.2.1 General provisions
Standard value (unless specified otherwise) represents the lower or upper limit of the statistical tolerance interval for which there is a 90% probability (1-a=0,90) that 95% (p=0,95) or 90% (p=0,90) of the values are at the lower boundary and above or on the upper edge and below (see tables 16 and 17). This definition refers to the long-term quality level of production.
7.2.2 Conditions of testing
The testing conditions shall be as given in table 3.
Table 3 — test Conditions mechanical properties
| Conditions for the production and delivery of products | Test conditions (test samples) |
| Manufactured by hot rolling method in a direct form | In the delivery condition |
| Manufactured by way of cold pressing in a direct form |
In aged condition |
| Made on a reel unwound and delivered | In aged condition |
| Manufactured and supplied on a reel | After straightening and in aged condition |
| Reinforcement mesh | In aged condition |
| Space frame | In aged condition |
| |
7.2.3 Properties tensile
7.2.3.1 Set the values for the tensile properties of (R, R
/R
, A
, and where you have R
/R
) should meet the specified regulatory value at R=0.95 for R
, and R=0,90 for A
, R
/R
and R
/R
.
7.2.3.2, the Values Rand R
are calculated by the nominal cross sectional area of the product.
7.2.3.3 For the yield strength Ris taken upper yield strength R
. If the phenomenon of fluidity is no need to determine the conditional yield strength R
.
7.2.4 shear Force of welded or clamp connections
7.2.4.1 Reinforcement mesh
The value set by the shear forces of welded joints in reinforcing the grid, Fmust be of minimal value. Set the minimum value of F
must be not less than 0.25 R
·A
,
where Ris the set of characteristic yield strength;
Ais the nominal cross — sectional area of either:
— larger wire diameter in the grid connections with single wires;
one of the double wires to the reinforcement mesh with dual wires.
7.2.4.2 Spatial frames
7.2.4.2.1 Weld
Set value shear forces at the point of welding of the spatial framework F, must be of minimal value. Set the minimum value of F
must be at least:
or
For the evaluation test result of shear forces you need to register the number of spot welds subjected to loading and destroyed at the same time.
Appendix A provides examples of weld points in the connection.
7.2.4.2.2 Clamping (climbie) connections
Clamping (climbie) connections are used only for the bottom chord and diagonals. Set the value of the shear force in the clamping coupling a spatial frame F, must be at least
7.2.5 Fatigue strength
Under fatigue testing with a controlled axial load in the range of varying voltage, the product must withstand the specified number of stress cycles. The voltage should vary sinusoidal in the prescribed range 2of the set
.
Values of 2and
must be determined on the basis of nominal cross sectional area of the rod, bar or wire.
7.2.6 Suitability for bending
7.2.6.1 Suitability to bending is determined by bending test and/or limb.
7.2.6.2 the bend Test, if required, is carried out according to EN ISO 15630−1 with a minimum angle of bend of 180°.
After testing the product there should be no breaks or cracks visible test with normal or corrected vision. The mandrel diameter specified for the bend test shall not exceed the appropriate maximum values specified in table 4.
Table 4 mandrel Diameter for bend test
| The nominal diameter d, mm |
The mandrel diameter max |
|
3d |
| >16 |
6d |
7.2.6.3 Test limb, if necessary, are performed according to EN ISO 15630−1.
Test samples shall be bent by minimum angle of 90° around a mandrel having a diameter not exceeding the appropriate maximum values specified in table 5, after aging and subsequent bending back of at least 20°.
After the test on the test sample should be no breaks or cracks visible test with normal or corrected vision.
Table 5 — Diameter of mandrel testing repeated bending
| The nominal diameter d, mm |
The mandrel diameter max |
|
5d |
>16 |
8d |
| >25 |
10d |
7.3 Dimensions, weights and tolerances
7.3.1 Diameters, cross-sectional area
Nominal diameters up to 10.0 mm, inclusive, must be expressed in halves of millimeters, and over 10,0 mm — in integer millimeters.
Preferred nominal diameters, cross sectional area and weight per meter given in table 6.
7.3.2 Mass 1 m and tolerances
Nominal mass per 1 m (see table 6) calculated based on the values of the nominal cross-sectional area and the values of density 7.85 kg/DM.
Permissible deviation from nominal mass per 1 m must be no more than ±4.5% above the nominal diameters of 8.0 mm and ±6,0% on the nominal diameters of 8.0 mm and below.
7.3.3 the length of the rods
7.3.3.1 length of the rods is consistent with the application and the order.
