Tiêu chuẩn iso 06934 2 1991 scan

INTERNATIONAL STANDARD IS0 6934 2 First edi tion 1 991 07 01 Steel for the prestressing of concrete Part 2 Cold drawn wi re Acier pour armatures de prkontrainte Partie 2 Fi i fr~fi l~ B froid Referenc[.]

F irst e itio

19 1-0 -01

Acier p ur armatures d prk ontra inte -

Pa rtie 2: Fii fr~fi~ B froid

Refere ce numb r

IS0 6 3 -2: 19 1 (E)

Foreword

IS0 (the Internationa l O rganization for S tan a rdiza tion) is a worldwide

f ederation of national stan ard b dies (IS0 memb r b dies) T he work

of pre a rin Interna tiona l Stan ard is normaly ca rried out throu h IS0

whic a tec hnic al c ommite has b en esta ls ed has the rig t to b

mental an non-governmental, in la ison with ISO, also ta e pa rt in the

work IS0 cola ora tes c losely with the Interna tiona l Elec trotec hnic al

Commis ion (IEC ) on a ll maters of elec trotechnic a l sta nda rdiza tion

Draf Interna tiona l Stan ard ado ted by the tec hnic al c ommite s a re

circ ula ted to the memb r b dies f or votin Publcation as an Inter

na tiona l Stan ard req ires a proval by a t le st 7 % of the memb r

b dies c astin a vote

Interna tiona l Stan ard IS0 6 3 -2 was pre ared by T ec hnic al C ommite

ISO/ T C 17, S te l

IS0 6 3 c on ists of the folowin pa rts, u der the genera l title Ste l f or

the presfres in of c onc rete:

- Part 1: General req irements

- Part 2: C old-drawn wire

- Part 4: Stran

- Part 5: Hot-oled ste l b rs wifh or without s bseq ent proc es in

An exes A an B of this pa rt of IS0 6 3 a re f or informa tion only

0 IS0 19 1

All rig ts re erv d No pa rt of his publc a tio may be repro uc ed or utiz d in an form

or by an mean , elec tro ic or mec hanic al inc lu in ph toc opyin a nd microfim, with ut

permisio in writin fom th publs er

Interna tio a l O rganizatio for Sta ndardizatio

Cas Po tale 5 l C H-121 Ge ev e 2 l Switz rlan

Printe in Switz rlan

Steel for the prestressing of concrete -

This part of IS0 6 3 sp ec ifies req irements for

rou d, c old-dra wn, hig -ten ie ste l wire, either

p lain, in ented, rib ed or crimp d T he prod ct is

stres -elev ed wire in c ois or c ut len th , a ccord-

IS0 6 3 -l

throu h referen e in this tex t, c on titute prov ision

of this pa rt of IS0 6 3 At the time of publc ation,

the edition in ic a ted was valid Al sta nda rd a re

s bject to revision, an pa rties to agre ments b sed

on this part of IS0 6 3 a re en ouraged to investi-

ga te the p os ib ilty of a pplyin the most rec ent edi-

tion of the sta nda rd in ica ted b low Memb rs of

IEC an IS0 ma inta in registers of c urently v alid

Interna tional Sta nda rd

IS0 6 3 -1:19 1, Ste l for the prestres in of con-

c rete - Pa rt 1: General req irements

3 Definitio s

For the purp ses of IS0 6 3 , the definition giv en

in IS0 6 3 -l a pply

ste l in a ccordan e with IS0 6 3 -l

T he wire s a ll b s p led without weld or other

joints

5 Surface co figura tio

T here a re sev era l typ s of s rfa ce c onfig ra tion

(r ib s, in enta tion , c rimps) the purp se of whic is

c rete T he typ of s rfa c e c onfig ra tion s all b

Examples of in enta tion an crimps a re giv en in

T he desig a tion , da ta for informa tion an req ired

pro erties a re giv en in ta ble 1 an table 2

wire

6.1.1 Dime sio s, mas es a d te sie pro erties

Se ta ble 1

6.1.2 Elon a tion an d c ti ty

T he p rcentage total elon a tion a t maximum forc e,

me s red on a len th of 2 0 mm, s all b not les

tha n I5 %

Al wires s a ll s ow a d c tie fra c ture with a con-

str ic tion v isib le to the nak ed ey e

Al wires s all with ta nd a rev erse b n test arou d

the b n ra diu giv en in the last column of ta ble 1

T he minimum n mb r of b n s is four for p la in

T a ble 1

- Dimen ion , mas es an ten ie pro erties of m il c oi wire

Nominal

diameter

te sie

cro s-s ctio a l

NominaW

ste gth’)

area

2

2

15

15

10

73

1) T he n minal te sie ste gth is for d sig atio purpo e o ly an is ca lc late fom th n minal cros-s ctio a l

a rea a nd th c aracteristic maximum forc e a nd ro n e o ff to th n are t 10 Nlm 2

2) In v iew of th smal toleranc o mas p er le gth, c a ra cteristic forc s hav e be n spe ifie rath r than ste s s

3) T he mas per le gth is ca lc la te by adop tin c nv entio a lly th v a lu 7,8 k gldm3 as th d n ity of ste l

4) In ord r to prov e th s itab ilty of th m eria l, whic is o ly u e in cra in app licatio s (e.g for ra ilwa y sle pers,

pie or ta nk) th re is a re uireme t for a forc at 1 % total elo gatio to be at least 8 % of th c a ra cteristic

maximum forc e

6.1.3 R ela xa tion

T he rela xa tion a t 10 0 h at an initial force of 7 %

of the c ha ra c teristic maximum forc e sp c ified in ta-

ble 1 s all b not more tha n IO %

initial force of 6 % of the c hara c teristic maximum

force (se ta ble 1) T he maximum rela xa tion is then

8 %

6.1.4 F a tig e

If a gre d b twe n purc a ser an ma nufa cturer, the

ma teria l s all with ta nd, without failure, 2 x 10s cy -

c les of a stres fluc tuatin down from a maximum

stres of 7 % of the nomina l ten ie stren th T he

ste s ra ng sa ll be 2 0 N/m 2 for p l n wire a nd

18 N/mm* for inten ed an rib ed wire

stres -elev ed wire

Se ta ble 2

6.2.2 Elon a tion an d c ti ty

T he p rcenta ge total elon a tion at maximum forc e,

me s red on a len th of 2 0 mm, s all b not les

tha n 3,5 % Al wires s a ll s ow a d c tie fra c ture

with a c on tric tion visib le to the naked eye

Al wires s all with ta nd a rev erse b n test a rou d

the b n ra diu giv en in the last column of table 2

T he minimum n mb r of b n s is four for plain

6.2.3 R ela xa tion

T he rela xation a t 10 0 h a t an initial forc e of 7 %

of the c ha rac teristic maximum forc e sp c ified in ta-

ble 2 s all b determined

If req ested, the rela xa tion a t 10 0 h s all b de-

termined a lso a t initial forc es of 6 % an 8 % of

the c harac teristic maximum force (se tab le ) T he

maximum rela xation v a lues a re lsted in ta b le

T a ble 2 - Dimen ion mas es an ten ie Dro erties of stres -elev ed wire

Yominal

Sameter

Nominal

te sie

ste gth’)

m

N/m *

12,2

12,2

140

1570

1 7

1 7

g/m

918

918

8

16 0

12,6

9 ,9

170

12,6

9 ,9

Nominal

cro s-

s ctio a l

area

m 2

l-

NominaW

le gth

Permis ible

d v iatio

g/m

* IO,5

& -IO,5

* &6

I 8 6

+ ,2

+5,9

z 5

f4 ,3

*4,3

It3 7

+3,7

*3,1

+3,1

Iz o

?I 2 0

maximum

forc

p ro i we

0, %4) 5) 6)

0,2 %4)‘3)

Be d

ra diu

3

2

9 5

7,8

76,7

2

64,3

5 ,4

54,7

5 ,

41,6

42‘6

34,7

2 ,8

2 ,5

2

2

2

2

15

15

15

15

10

10

1) Th n min l te sie stre gth is for d sig a tio purp ses o ly a d is ca lc la te from th n min l cros -sectio a l

are a d th cha ra cteristic maximum force a d roun e of to th n arest 10 N/m p

2) In view of th sma ll tolera nce o mas p r le gth, cha ra cteristic forces h v b e sp cifie ra th r th n stres es

3) Th mas p r le gth is ca lc la te by a o tin co v entio a lly th v lue 7,8 k g/dm3 as th d nsity of ste l

4) For wires of diameter la rg r th n 8 m , th cha ra cteristic 0, % a d 0,2 % pro f forces are a pproximately 8 4/o,

resp ctiv ely 8 %, of th cha ra cteristic maximum force For wires 8 mm a d sma ller, th coresp n in figures are

a proxim ely 8 %, resp ctiv ely 8 %

5) Th mo ulu of ela stic ity may b tak en to b 2 5 kN/m 2 + 10 k N/m 2

6) 0.1 % pro f force is ma d tory a d 0,2 % pro f force is for inform io o ly (se IS0 6 3 -l), ex e t w he oth r-

wise a re d

Table 3 - Maximum relaxa tion v a lues

Initial forc in perc nta ge R ela xa tio clas

%

I

70

6

8

12,0

49

In th a se ce of d ta u e 10 N/m * prov isio a lly

IS0 6 3 -l a d b d sig ate as folows

If a re d b tw ee purch ser a d ma nufacturer, th

m eria l sha ll withsta nd, with ut fa ilure, 2 x 10 c -

cles of a stres flu tua tin d w n from a maximum

b) leter referin to trea tme t:

M = m il c oi wire (se IS0 6 3 -l)

S = stres -relev ed wire (se IS0 6 3 -l);

c) leter referin to wire s rfa ce (se IS0 6 34 -l)

P = pla in

I = in ented

C = crimp d

R = rib ed:

d) nominal dia meter, in mi imetres;

mi imetre;

f rela xa tion cla ss (R ela x 1 or Rela x 2)

Exa mple:

S tres -elev ed in ented wire of nomina l dia meter

c la ss 1 rela xa tion is desig a ted:

IS0 6 3 -2-Sl-7-1 5 0-Rela x 1

8.1 C oi size

T he internal dia meter of mi c ois s a ll b a gre d

Stres -elev ed wire s all b wou d into la rge di-

ameter c ois, in order to a v oid a c an e in mec an-

en ure sa tisfac tory

stra ig tnes (se 8.2)

les tha n 2 0 times the wire dia meter

8.2 Curv a ture of stres -elev ed wires

When a len th of wire is ly in fre on a plain s r

fa c e, the maximum b w heig t from a ba se-lne

c rv e, s a ll b not grea ter tha n 3 mm for an wire

dia meter

A.1 In enta tio s

(informa tiv e)

T he folowin example in ic a tes a widely u ed a r-

ran ement of in enta tion T he nomina l dimen ion

of the in enta tion rela ted to nomina l wire dia m-

n m

F ig re A.1 - In enta tion

crimpin a re s own in fig re A.2 an ta b le A.2 Other

I

L Pitc

Helc a l

Uniplam

F ig re A.2 - Crimps

T a ble A.1 -

Nomina l in enta tion dimen ion

Dime sio s in mi mete

Nominal in e tatio dime sio

Nominal wire

dia meter

Depth

L en th

I Pitc

n

n m

n

< $

0,12 + 0,0

3,5

5,5

I

I

I

Table A.2 - Crime dimen ion

T ype of crimp

Short p itc h

L n p itc

Pitc

5dto 10

8 to 12

Tota l wav h ig t (e clu in th wire dia meter, d )

Helca l

Unip la na r

5 % dto 10 % d

lO % dto 0%d

A nn x 6

(informa tiv e)

A ls t of recommen ed internal dia meters of c oi is giv en in table B I

Table B.1 - Recommen ed interna l dia meters of

c oi

Nomin l wire dia meter

Recom e d d interna l

dia meter

UDC 6 9.14-I 2 2-4 6:6 1.714:6 1.3 6

De c riptors: c onc rete, pre te s d c onc rete, ste ls, pre te sin ste ls, c old drawn pro uc ts, wire, spec ific atio s, dime sio s,

d sig a tio , d lvery c on itio

Pric b s d o 6 pg s