ISO 16020:2005 コンクリートの補強とプレストレス用鋼 — 語彙 | ページ 5

2.1.1

prestressing steel

wire, bar or strand used in a ten­sioned state to improve the tensile capacity of structural concrete members

2.1.2

reinforcing steel

wire or bar used in its unten­sioned state to improve the tensile or compressive capacity of struc­tural concrete members

2.1.3

bar

product supplied in straight lengths, its cross-section being generally circular, sometimes square with rounded corners

2.1.3.1

hot-rolled bar

bar which has been produced from billets by hot-rolling, either directly in straight lengths or coiled and straightened, but not cold-worked in other ways

Note 1 to entry: The term includes micro-alloyed bars, and quenched and self-tempered bars.

2.1.3.2

cold-reduced bar

wire (2.1.6) supplied in straight lengths

Note 1 to entry: Cold-reduced is a com­mon term for cold-drawn and cold-rolled.

Note 2 to entry: Cold-working is a common term for cold-reducing, stretching and any kind of coiling or decoiling.

2.1.3.3

stretched bar

stretched reinforcing steel (2.1.5) supplied in straight lengths

2.1.4

rod

product which has been wound into coils directly after hot-rolling and possibly recoiled, but not cold-worked in other ways

Note 1 to entry: Rod may have a plain, ribbed or indented surface. Plain rod is often referred to as wire rod.

2.1.4.1

recoiled rod

rod (2.1.4) which has been re­wound into another, subsequent coil

2.1.5

stretched reinforcing steel

reinforcing steel (2.1.2) which has been moderately stretched in cold condition with no significant reduction in size

Note 1 to entry: The term applies to the prod­uct in form of coils or bars.

2.1.6

wire

cold-reduced product generally of constant cross-section throughout its length, the dimensions of the section being small compared with the length and in which cold-reducing is accomplished by drawing wire rod through one or more reducing dies, or by passing under pressure between rolls, and recoiling the cold-reduced product

Note 1 to entry: The cross-section is generally circular but sometimes square with rounded corners.

Note 2 to entry: Modified from ISO 6929:1987.

Note 3 to entry: The term “wire” also applies to the decoiled product.

Note 4 to entry: In the coiled condition after cold-reducing, but before any further treatment, the wire is called a mill coil wire.

2.1.6.1

stress-relieved wire

Note 1 to entry: These treatments improve certain mechanical properties and relaxation characteristics, method b) giving lower stress relaxation (i.e. stabilized wire).

2.1.6.2

quenched and tempered wire

wire to be used as prestressing steel and which has been heated to a high temperature, rapidly cooled to produce a martensitic structure and then tempered at a suitable temperature

Note 1 to entry: The surface of the quenched and tempered wire may be covered by a thin film of scale. The wire may be plain, ribbed, grooved or indented.

2.1.7

coil

single length of reinforcing or prestressing steel wound in con­centric rings

Note 1 to entry: In the case of prestressing strands, the coil may be called a reel.

2.1.8

strand

prestressing steel consisting of two or more wires spun together in a helical form

2.1.9

lattice girder

two or three dimensional steel components comprising an upper chord, a lower chord and continu­ous or discontinuous diagonals which are welded or mechanically assembled to the chords

2.1.10

welded fabric

geometrical arrangement of lon­gitudinal and transverse wires or bars that are arranged substan­tially at right angles to each other and welded together for force transfer at all points of intersec­tion

Note 1 to entry: The terms “welded wire rein­forcement” or “mesh” are also used in some countries.

2.1.10.1

stock fabric

welded fabric available from stock, manufactured according to manufacturer´s specifications

2.1.10.2

special fabric

welded fabric manufactured ac­cording to user´s specific require­ments

2.2.1

length of fabric

longer side of the welded fabric, irrespective of the manu­facturing direction

2.2.2

width of fabric

shorter side of the welded fabric, irrespective of the manu­facturing direction

2.2.3

spacing

centre-to-centre distance of wires or bars in a welded fabric

Note 1 to entry: For twin wire fabric, the spacing is measured between the lines of contact of the adjacent wires or bars.

2.2.4

overhang

length of longitudinal or transverse wires or bars beyond the centre of the outer crossing wire or bar

Note 1 to entry: For twin wire fabric, the over­hang is measured from the line of contact of the adjacent wires or bars.

2.2.5

core

that part of the cross-section of a wire or bar containing neither ribs nor indentations

2.2.6

lay length

pitch or axial length of one complete turn of the helix formed by a single wire in a strand

2.2.7

rib

protuberance on a wire or bar

2.2.7.1

longitudinal rib

uniform continuous rib parallel to the axis of the wire or bar

2.2.7.2

transverse rib

rib at an angle, either perpen­dicular or oblique, to the longitu­dinal axis of the wire or bar

Note 1 to entry: The term “deformation” is used to denote transverse rib in some countries.

2.2.8

transverse rib inclination

β

angle between the rib and the longitudinal axis of the wire or bar

2.2.9

transverse rib flank inclination

α

angle between the flank of a transverse rib and the core surface of a bar or wire measured perpendicular to the longitudinal axis of the transverse rrib

2.2.10

rib spacing

c

distance between the centres of two consecutive transverse ribs measured parallel to the axis of the wire or bar

2.2.11

relative rib area

f_R

area of the projections of all transverse ribs within a defined length on a plane perpendicular to the longitudinal axis of the wire or bar, divided by this length and the nominal cir­cumference

2.2.12

rib height

α

distance from one point on the rib to the surface of the core, to be measured normal to the axis of a wire or bar

2.2.12.1

maximum rib height

α_max

distance from the highest point on the rib to the surface of the core, to be measured normal to the axis of wire or bar

2.2.13

ribless or indentationless perimeter

∑e_i

sum of the distances on the sur­face of the core between the ends of the transverse ribs or indenta­tions of adjacent rows measured as the projection on a plane per­pendicular to the wire or bar axis

2.2.14

indentation

regular imprint on the surface of a wire or bar

2.2.15

nominal cross-sectional area

the cross-sectional area equiva­lent to the area of a circular plain wire or bar of the nominal diame­ter

2.2.16

nominal diameter

d

quantity used as designation and reference for the size of a wire or bar

Note 1 to entry: Size tolerances are normally specified by tolerances on the mass of a test piece divided by its length.

2.2.17

twin wires [bars]

two wires [bars] of the same type and size placed adjacently in a welded fabric in contact with each other as a pair

2.2.18

crimped wire

wire which has regular defor­mation of the wire axis in either a single plane or in a helical form produced by a mechanical proc­ess

2.2.19

plain wire

wire with a surface as obtained in the drawing die where the wire has a constant nominal cross-section and does not show periodical irregularities along the length in either the surface or axis

2.2.20

ribbed wire [bar]

wire [bar] whose surface has transversal ribs at regular inter­vals along the length

2.2.21

indented wire [bar]

wire [bar] whose surface has indentations at regular intervals along the length

2.2.22

grooved wire

wire whose surface has continu­ous helical grooves along the length

2.2.23

longitudinal wire [bar]

reinforcing wire [bar] in the manufacturing direction of a welded fabric

2.2.24

transverse wire [bar]

reinforcing wire [bar] perpen­dicular to the manufacturing di­rection of a welded fabric

2.3.1

upper yield strength

R_eH

value of stress at the moment when the first decrease in force is observed in a tensile test on a material which exhibits a yield phenomenon

Note 1 to entry: Adapted from ISO 6892:1998.

2.3.2

non-proportional extension proof strength

R_p

stress at which a non-proportional extension is equal to a specified percentage of the extensometer gauge length where the symbol used is followed by a suffix giving the prescribed percentage, for example: R_p0,2

[SOURCE: ISO 6892:1998]

2.3.3

tensile strength

R_m

stress corresponding to the maxi­mum force

[SOURCE: ISO 6892:1998]

2.3.4

maximum force

F_m

the greatest force that the test piece withstands during a tensile test once the yield point has been passed; 〈for materials without a yield point〉 the maximum value during the test

Note 1 to entry: Adapted from ISO 6892:1998.

2.3.5

percentage total elongation at maximum force

A_gt

increase in the gauge length of the test piece at maximum force, expressed as a percentage of the original gauge length

Note 1 to entry: Adapted from ISO 6892:1998.

2.3.6

relaxation

time-dependent stress loss for a constant strain

Note 1 to entry: Relaxation is stated as a percentage of the initial stress applied to the steel.

2.3.7

stress range

difference between maximum and minimum stress in a fatigue load cycle

2.3.8

D -value

reduction of the maximum tensile force due to deflection of a strand

2.3.9

fracture

separation, in two or more pieces, of a test piece caused by a force

Note 1 to entry: Another term for this concept is “rupture”.

2.3.10

fissure

small crack on the surface of a test piece

Note 1 to entry: Fissures will not necessarily lead to fracture of the test piece subject to a force.

2.3.11

tensile strain

ratio of elongation to original gauge length

2.3.12

yield point

point at the force/strain curve at which an increase in strain occurs without increase in force

2.4.1

ageing

phenomenon leading to a modifi­cation in the properties of a fer­rous product due to the migration of interstitial elements, and which can occur at ambient temperature or at temperatures close to it

[SOURCE: ISO 4885:1996]

2.4.2

artificial ageing

acceleration of ageing by elevated temperature

2.4.3

cast analysis

chemical analysis representative of the cast determined by the steelmaker in accordance with his own procedures

[SOURCE: ISO 404:1992]

2.4.4

product analysis

chemical analysis carried out on the product

[SOURCE: ISO 404:1992]

2.4.5

certification

procedure by which a third party gives written assurance that a product, process or service con­forms to specified requirements

[SOURCE: ISO/IEC Guide 2:1996]

Note 1 to entry: In ISO 10474 the terms “certify” and “certificate” are used also when the assurance is made by the manufacturer (first party).

Note 2 to entry: This term and its definition are soon to be included in ISO/IEC 17000.

2.4.6

inspection

conformity evaluation by observa­tion and judgement accompanied as appropriate by measurement, testing and gauging

[SOURCE: ISO 9000:2000]

2.4.7

sample

sufficient quantity of material taken from an item in a test unit for the purpose of producing one or more test pieces

[SOURCE: Adapted from ISO 404:1992.]

2.4.8

test piece

part of the sample, with specified dimensions, machined or un­machined, brought to a required condition for submission to a given test

[SOURCE: ISO 404:1992]

Note 1 to entry: Test pieces for reinforcing and prestressing steel are generally not machined.

2.4.9

test unit

number of pieces or tonnage of products to be accepted or rejected together, on the basis of the tests to be carried out on sample products in accordance with the requirements of the prod­uct standard or order

[SOURCE: ISO 404:1992]

2.4.10

characteristic value

value having a prescribed prob­ability of not being attained in a hypothetical unlimited test series

[SOURCE: ISO 8930:1987]

Note 1 to entry: Equivalent to “fractile” which is defined in ISO 3534-1:1993.

2.4.11

traceability

ability to trace the history, application or location of that which is under consideration

[SOURCE: ISO 9000:2000]

2.4.12

manufacturer

enterprise which produces reinforcing or prestressing steel by hot-rolling, cold-reducing or stretching, or produces welded fabric or lattice girders or strands

2.4.13

fabricator

enterprise which cuts and bends and/or assembles reinforcing steel to the dimensions and shapes specified

Note 1 to entry: The concept does not include the manufacture of welded fabric and the assembling of lattice girders.

2.4.14

end anchorage

object fixed to the end of a bar to increase its anchorage strength in concrete

2.4.15

welded butt joint

type of welded joint where the parts lie in the same plane and abut against each other

[SOURCE: ISO 17659:2002]

2.4.16

welded cross joint

type of welded joint where two parts (e.g. wires) lie crossing over each other

[SOURCE: ISO 17659:2002]

2.4.17

welded lap joint

type of welded joint where the parts lie parallel to each other and overlap each other

[SOURCE: ISO 17659:2002]

2.4.18

corrosion

physicochemical interaction bet­ween a metal and its environment which results in changes in the properties of the metal, and which may lead to significant impairment of the function of the metal, the environment, or the technical system, of which these form a part

[SOURCE: ISO 8044:1999]

2.4.18.1

stress corrosion

process involving conjoint corro­sion and straining of the metal due to applied or residual stress

[SOURCE: ISO 8044:1999]