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.

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:1( (:4-1

3 (: ) =fy400 MPafy= 240 MPa.

)( 400 MPa:)1.25fsu-

(.- 460 MPa5%

30.- .460 MPa- 460 MPa 460 MPa. - )12% (4-1

2(4-1)(4-2):

( 4-1 ( :) (

3

( 4-2 :)( (

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):4-1-2-4 2) -2

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.

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4-2-1-1-7 ( (:)( : .... .....

:4-2-3-2-8 :( ..... 150 300)28.... :-4-2-49

(fc) .

)( (4-9.)

C45 . .

( 4-9: ) C5C8C10C12

fcMPa581012

kgf/cm5080100120

....-))

C15C18C20C25C30C35C40C45 fc

MPa1518202530354045

kgf/cm150180200250300350400450

C18

. 10 4-2-5-1 )(k )(

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4-2-6::11( ( ))

( ( ))12

) 4-10: )*kgf/cm300350400450

C18C20C25C30C35C40C45

fcMPa18202530354045

kgf/cm180200250300350400450

.silica fumesuper plasticizer* .

13( 4-11: )*kgf/cm100150200250300350400450

C5C8C10C12C15C18C20C25fc

MPa58101215182025

kgf/cm5080100120150180200250

.silica fumesuper plasticizer*.

)4-2-8-: )14 )( 1-Eco:

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cjco

cmkgff18000E

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: :-5-11

)( )( ) )5%10% 50( )90%(95%) )(-(5-1. ) .

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)5-1-2-2 )(:) : ()

.:-5-2-13

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: 1.1

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: E

0.2E.

8 5-5-3-)( )( ::

15C+15C-25C20C+20C-30C

25C+25C-35C30C+30C-45C

9 5-6-2-15-6-2-65-6-2

( 2 (:-5-6-510

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)) )( .3:

.... .

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:-5-6-712 (6):....

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.

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:::-6-2-11

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HE:-6-3-2-13 :

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..

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dSorLr50LfW31D21cW80orLfSorLr61D21

1

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::-6-3-2-24 (H((F )P( ))T .)

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N

509090c

u

....

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uN( cAc0.1 f)0.65(cAc0.1 f) 0.650.9.

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: (

( :)(21.6- )

1).22.0- ) ( .2.2121.6-

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:):-7-1-21 :15)

1- 0.025 Ac (30 MPa30 MPa c0.035 AcA0.04mechanicalcouplers).

.....

5- 0.06 Ac30 MPa(30

MPac0.07 A.)7-1-4-1-:)2

: ((7-2300 mm.....-

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( 400 mm(:-7-2-.....-.....

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.-(7-1) ) :)

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:Mn= As. fy. (d-y/2)

2-( )

)(. -()( ) ......43C)-B-2(A:3

( (:-7-2( (

(:(-(7-2 (( (-7-2 :

( (

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4

( (:7-2-( (

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5

( (:-7-2

( (

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( (:-7-2 ( ( 7( ):):7-3 )) ).)(:-7-2-1-28 -:

) )2)1 (( )9( )(7-5-)124 :

( 70%7-5-):

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):-7-2-1-810 ( :)( )( )(

10 m- 0.1 L .:-7-2-1-911

:) ( )( -(0.2)......-

500 mm.

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):-7-2-212 (1:1-

h

L: )h)(L L)15( 7-1-)

. . h

L( (-7-1 .

:T-7-2-3-613( )Actfy:Act..... =.

fy=.)):-7-3-1-114 "" )(::-7-3-1-215

- ) ) (7-5-:)1) (.(L2) (L0)(d.)3) (1.05.)

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:7-3-2-3-16:)(

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-.

))7-3-4-17 ::) )

- . . )( ). (

.:)(

-( .25 mm(:-7-3-4-118

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19

:-7-3-4-2 )(: -)( 26 mm )6 mm (.7-127-11 16 (26.)

) )7-11 )(.)7-12 (

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:-7-3-5-120( )

) ( )( ( )

( 7-4):-

(7-3-3-1 )120 .

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.L-(

)(mint)( ( (7-4 )L .

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1L/27L/30L/24L/271L/22L/24L/20L/22

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7-4-5-:22 )(: ) )

- ( c0.003 A( ....c0.0025 A- c0.025 A(cA )

(9-1)

- ((7-1-223( :(::7-18

( (24

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( )7-27 )()7-26 4:))..... : )

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LLw11w 21.

)`w: b.):-7-10-430 ) )5 ()7:

(.(.....-57-( .)

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( )3 ))3 ))4 )( )4 )(()5 5: )3-

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:-7-11-433( 167:)

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200 mm..((7-1-4-7

:-7-11-534:

.

5 kg/cm.

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: :-8-11

:( )(.....8-2 8-11)

( 8-12 (( (8-13

(2 ( -8-4-2-2-8-4-2-3 )(

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:-8-13

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):-8-13-1 ((.(58-13-2-:( ((.(68-13-3-( : ) ((.7):-8-13-4 ((.(88-13-5-:( ((.(9):-8-13-6 ((.(10

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8-13-7-:( ((.(11:-8-13-8 ( ((.(12):-8-13-9 ((.(13):-8-13-10 ((.(14

5/28/2018 4

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24

: 1fy:

400360300280240fyfc

250240240 1530026025024016.5

400360300280240189-2-1-2 ( :)

( 6:)6-.....

: cf30 MPa(300 kgf/cm)7 MPa0.05 .y.

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4

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(::-9-2-10-75 ) u(9-2-8-2 )0.8

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: :-10-11

fy:

fyfc(MPa)(= 18 MPacf) fy(MPa).

400360300280240fyfc

250240240 1530026025024016.5

40036030028024018:10-3-2-1-2

:) ) ( .....(10-3-3-2-

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-.....

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0 tc70.t0.35 (10-2-5-4-.)

0.35 t0.35 tc( )-10-2-5-4 )10-3-5-4-):-10-4-26

0.20 mm0.15 mm.

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)7 :s10-4: ) 0.1 mm1.81.0

0.15 mm2.71.5

0.2 mm3.62.0

0.3 mm5.43.0

8fcb10-5-4:ccb f70f .

(ccb f212f .)9()( ):10-5

) (.(**):

** ) ).....

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27

: ::-11-4-21

.....(-1-7.)( (

:11-4-3-:2 .....

(-1-6.)( (11-5-2-:3

( )( 3-: )-.....- .20

411-10-: . 50 .

: 1(( )( )7)12-3-2

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: ):-13-1-21 7:)

7- .2 cm::-13-4-42

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: 45 (.)40(600 mm.)35 (200600 mm.)30( 200 mm.)

10 . )( .

)(

.

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29

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