3

11 2006

1

Steel

3.

Steel 3 (

EN 1993.01.01:2005) . 2000,

2003 .

Steel , -

.

.

,

2003 .

,

. ,

FsdFRD

Fsd FRD .

.

:

1, 2 3.

3.

1 2.

, -

, -

.

2

,

3.

1

x x y y z z b h tw tf fy fu A Iy y yIz z zIT Iw Wpl Wpl,y y yWpl,z z zWel Wel,y y yWel,z z ziy iz E G Poisson

M Mi NED My,ED y yMz,ED z zVy,ED y yVz,ED z zTED NRD My,RD y yMz,RD z zNt,RD Vpl,RD Vpl,T,RD TRD Ncr,y y yNcr,z z zNcr,T Ncr,TF

2

1:

3

. -

1 , ,

,

. , -

( , ,

) .

3.1

1 -

:

:

. ,

O-X -

O-Y .

,

. .

.

: ( 3, -

. 0.50

1.00. 0.67 1.00)

: 1.00 :

.

3

, : 0.50

, - : 0.85

, : 1.00

, : 1.00

, - : 2.00

-

.

.

, x ,

L/x.

.

:

. Steel

-

,

, .

. ,

-

-

.

.

. -

.

-

.

.

-

3

.

, -

. ,

, -

.

.

errordia.xxx xxx

.

.

.

.

4

2:

3.2

, 2.

.

-

:

By yMBy yBz zMBz zLy y (m)Lz z (m)C1 < 0

, = 0 C1 6.6 , > 0 C1 .

3.3

, 3

-

(

8)

:

. ,

.

5

3:

.

.

.

.

.

.

.

.

.

. -

, .

. ,

.

,

==>2 IPBl600

3.4

, -

( ) .

. , -

Steel.

4

Steel

( ).

: Nt,ED Nb,ED Vy,ED Vz,ED My,ED Mz,ED Tt,ED. Steel .

.

, 2000 2003,

-

X(X1, X2, X3) Y (Y1, Y2, Y3).

X1 = YKB + 0.1LyX2 = YKB 0.1LyX3 = YKBY1 = XKB + 0.1LxY2 = XKB 0.1LxY3 = XKB 9 :

1 X1, Y1, Z2 X1, Y2, Z3 X1, Y3, Z4 X2, Y1, Z5 X2, Y2, Z6 X2, Y3, Z7 X3, Y1, Z8 X3, Y2, Z9 X3, Y3, Z 10 , : MY ,

MY , MZ , MZ , N , M , QY , Qz

, Qz , QY .

, 10

:

1

MY Max, MY , MZ , MZ , N , M

, QY , Qz , Qz , QY

2

MY , MY Max, MZ , MZ , N , M

, QY , Qz , Qz , QY

7

...

10

MY , MY , MZ , MZ , N , M ,

QY , Qz , Qz , QY Max

10 9

90 .

01-10 1 Max

11-20 2 Max

...

81-90 9 Max

, 1,

(1 9)

.

57 : 6 =(5+1)=X2, Y3, Z

7 MY , MY , MZ , MZ , N

, M , QY Max, Qz , Qz , QY

5

. Steel

-

1.

2000 2003, Steel

2000,

.

, ,

1.01 + 1.02 + 11 2 ,

2000 .

. ,

2000.

3 10 ( ).

6

, ,

1,2 3

.

, Steel

Steel.

8

Steel , , 4.

4, Steel

3.

6.1

: 1993.1.1:2005

6.2.3Nt,RD =

AfyM0

(1)

Steel . ,

.

6.2

:

Nc,RD = min{Npl,RD, Nb,RD} (2)

1993.1.1:2005

6.2.4Npl,RD =

AfyM0

(3)

Nb,RD =AfyM1

(4)

=1

+2 2

1.0

= 0.5[1 + ( 0.2) + 2]

=

AfyNcr

=Lcri

1

1

1 = pi

E

fy

6.1 6.2 3. Lcr Steel .

,

. 1993.1.1:2005

6.3.1.4 -

( 4) -

1,2 3 :

=

AfyNcr

(5)

9

Ncr = Ncr,TF

Ncr Ncr,T

:

Ncr,T =1

i2M(GIt +

pi2EIwL2T

) (6)

:

i2M (Ncr,TF Ncr,z)(Ncr,TF Ncr,y)(Ncr,TF Ncr,T )N2cr,TF z

2

M (Ncr,TF Ncr,y)N2cr,TFy2M (Ncr,TF Ncr,z) = 0 (7)

i2M = i2

y + i2

z + y2

M

.

zM , yM .It, Iw .LT LT = L , LT = 0, 5L .

0, 2 Npl,RD( 6.3.1.2(4) 3)

6.3

: 1993.1.1:2005

6.2.6

Vpl,RD =Av(fy/

3)

M0(8)

Av : ( 6.2.6(3) 3) A 2btf + (tw + 2r)tf 6< hwtw 2btf (tw + 2r)tf U A 2btf + (tw + r)tf 0, 9(A btf )

Ah/(b+ h) Ab/(b+ h) 2A/pi A

Av = siA si yy zz Steel. sy = sz = 0.8.

Vpl,RD Vpl,T,RD

10

Vpl,T,RD =

1 t,ED

1.25(fy/3)/M0

Vpl,RD (9)

U

Vpl,T,RD =

[1 t,ED

1.25(fy/3)/M0

w,ED(fy/

3)/M0

]Vpl,RD (10)

Vpl,T,RD =

[1 t,ED

(fy/3)/M0

]Vpl,RD (11)

6.4

-

:

TRD =

(1

4

i

bit2

i

)(fy/

3

M0

)(12)

bi ti i. 1993.1.1:2005

6.2.7

6.5

y y z z, .

: 1993.1.1:2005

6.2.5, 6.2.8 VED 0.5Vpl,RD 1 2

Mc,RD =Mpl,RD =WplfyM0

(13)

3

Mc,RD =Mel,RD =WelfyM0

(14)

VED > 0.5Vpl,RD

1 2

Mc,RD =Mpl,RD =Wpl(1 )fy

M0(15)

3

Mc,RD =Mel,RD =Wel(1 )fy

M0(16)

11

:

=

(2VEDVpl,RD

1)2

=

(2VEDVpl,T,RD

1)2

= 0 VED 0.5Vpl,T,RD

6.6

. -

,

. Steel

.

: 1993.1.1:2005

6.3.2.1Mb,RD = LTWy

fyM1

(17)

:

Wy =Wpl,y 1 2Wy =Wel,y 3LT - :

LT =1

LT +2LT 2LT

1.0

LT = 0.5[1 + LT (LT 0.2) + 2LT ]

LT =

WyfyMcr

LT 6.3 6.4 3. Mcr () :

Mcr =C1pi

2EIzK2

IwIz

+K2pi2

GITEIz

C1 3.2 :

C1 = 1.132 C1 = 1.0K2 = (KL)

2 K = 1.0 L .

12

7

7.1

:NEDNt,RD

1.0 (18)Nt,RD 1

7.2

:NEDNc,RD

1.0 (19)Nc,RD 2

7.3

:

VEDVpl,RD

1.0 (20)

Vpl,RD 8

Vpl,T,RD 9 10 11

VEDVpl,T,RD

1.0 (21)

Vpl,T,RD : (

VEDVpl,RD

)2+TEDTRD

1.0 (22)TRD 12

7.4

:

TEDTRD

1.0 (23)

TRD 12

7.5

(

. 6.6 :

MEDMb,RD

1.0 (24)

Mb,RD 17

13

7.6 ,

:

NEDNRD

+My,EDMy,c,RD

+Mz,EDMz,c,RD

1.0 (25)

NRD 1, 2My,c,RD,Mz,c,RD 13 14 - 15 16 .

7.7 ,

: 1993.1.1:2005

6.3.3NEDyNRkM1

+ kyyMy,ED

LTMy,RkM1

+ kyzMz,EDMz,RkM1

1.0 (26)

NEDzNRkM1

+ kzyMy,ED

LTMy,RkM1

+ kzzMz,EDMz,RkM1

1.0 (27)

:

y, z .LT .kyy, kyz, kzy, kzz . - .

NRk Mi,Rk :

1 2 3

Ai Wy Wpl,y Wpl,y Wel,yWz Wpl,z Wpl,z Wel,z

NRk = fyAi,Mi,Rk = fyWi

8

, -

. , .

. 18

. 19

Y , Z. 20

Y , Z. 25

. 23

. 26 27

. 24

14

4:

. 25

. 25

. 25

. 25 -

9

:

Vpl,RD 6.3.

Mc,RD 6.5.

- .

.

.

,

.

, .

10

Steel : .

4 .

. -

: ,

15

5:

(),

(.), (-), -

(max),

(By Bz Ly Lz), () -

() ,

() * .

.

m kN kNm. ,

-

menu Steel.

Steel.

16

11

1. EN 1993.01.01: 3: -

- 1-1: .

2. . : . . -

2003

3. ., ., .:

. 2006

4. ., ., .: . -

3. . 1999,2000

5. (): . -

1-4. . .

17