ConcreteExercises_Lesson6

8/13/2019 ConcreteExercises_Lesson6

1/20

P F PF E

P . . . . E A


2/20

E 1

D ,

EN 1992 1 2

2


3/20

E 1

3


4/20

E 2

C 5 200 ( =25 ). T 1

. T .

M :

C C25/30 L ( : 250 / ; : 471 / ),

BE 500 S

L : 40 ( + ) , : 1 N/ D , : 25 N/ V , : 4.1 N/ ; 2 =0.3

4

W ?

C 500 C ?


5/20

E 2 :

5

= + =200 + 40 = 240

120

; = 25


6/20

E 2 : 500 C . . (1)

A

W ?ME , = ?ME , = ?ME , = ?

, = 2 . , + , + ( , . )= 0.3 . 4.1 + 1 + (25 . 0.2) = 7.23 N/

ME , = , . / 8 = 7.23 . 5 / 8 = 22.6 N /

= 1.35 . (25 . 0.2 + 1) + 1.5 . 4.1 = 14.25 N/ME , = /12 = 14.25 . 5 /12 = 29.7 N /ME , = /24 = 14.25 . 5 /24 = 14.84 N /

6


7/20

( 30 300 1 20.860 450 0.89 18.5390 550 0.625 13.01120 650 0.35 7.29180 750 0.17 3.54240 800 0.11 2.29

(*) T F A.2, EN1992 1 2, .64 = 25 (**) F EN1992 1 2 .33: F 4.2 ( )

E 2 : 500 C . . (2)

MR , , = ( / , ) . () . ME , . (A , / A , )= (1.15 / 1) . () . 14.84 . (250 / 204.9) = 20.8 . ()

7

ME , = 14.84 N / EN1992 1 1 A , , = 204.9 /


8/20

E 2 : 500 C . . (2)

MR , , = ( / , ) . () . ME , . (A , / A , )= (1.15 / 1) . () . 14.84 . (250 / 204.9) = 20.8 . ()

8

ME , = 14.84 N / EN1992 1 1 A , , = 204.9 /

( 30 300 1 20.860 450 0.89 18.5390 550 0.625 13.01120 650 0.35 7.29180 750 0.17 3.54240 800 0.11 2.29

(*) T F A.2, EN1992 1 2, .64 = 25 (**) F EN1992 1 2 .33: F 4.2 ( )


9/20

E 2 : 500 C . . (3)

A

MR , , = ( / , ) . () . ME , . (A , / A , ) . ( ) / = (1.15 / 1) . () . 29.7 . (471 / 409.5) . (175 25) / 175

() = 1, < 350 C= 33.67 N /

9

ME , = 29.7 N / EN1992 1 1 A , , = 409.5 /


10/20

(

30 33.67 20.8 54.47 >22.6 OK60 33.67 18.53 52.20 >22.6 OK90 33.67 13.01 46.68 >22.6 OK

120 33.67 7.29 40.96 >22.6 OK180 33.67 3.54 37.21 >22.6 OK240 33.67 2.29 35.96 >22.6 OK

E 2 : 500 C . . (4)

A

( MR , , ,1 + MR , , ,2) / 2 + MR , , ME ,

10


11/20

(

30 33.67 20.8 54.47 >22.6 OK60 33.67 18.53 52.20 >22.6 OK90 33.67 13.01 46.68 >22.6 OK

120 33.67 7.29 40.96 >22.6 OK180 33.67 3.54 37.21 >22.6 OK240 33.67 2.29 35.96 >22.6 OK

E 2 : 500 C . . (4)

A

( MR , , ,1 + MR , , ,2) / 2 + MR , , ME ,

11

CONCLUSION: T REI 120, REI 240!(CAUTION! T ! T A ,


12/20

E 3C 3 5

4 , .

M : C C 25/30 R 5 8 / , BE 500 S

L : M = 8.8 N / M = 2.9 N /

C = 46 S = 180

REI 240?

12


13/20

E 3 S ( = 0.7)

M , = M . = 8.8 0.7 = 6.2 N /M , = M . = 2.9 0.7 = 2.0 N /

240? = + /2 = 46 + 8/2 = 50 = + + /2 = 46 + 8+ 8/2 = 58

T( ) = 570 C ; T( ) = 500 C(T ) = 0.55 ; (T ) = 0.8

A = 5 . . ( /2) = 251 / = = 180 50 = 130 = = 180 58 = 122

MR , = A . . (T) . 0.9 . = 251 . 500 . 0.55 . 0.9 . 130

= 8.07 N /MR , = A . . (T) . 0.9 .

= 251 . 500 . 0.8 . 0.9 . 122= 11.02 N /

240?

T 140 C ??P !O (EN13381 3), 13

( )

( )

! > ,

! > ,


14/20

E 4

S . T 4 , 500 200 . T

ISO 834 3 .

M : C C 30/37 L 10 , BE 500 S

S 8 , BE 500 S

L : V : 22.4 N/

14

W ?

I 500 C .

40 70 100

200

500

38


15/20

E 4 S (1)

15

A

( )

A

( )

. A4 :B

300 160

60

. A7 :B

600 300

60

2 40 38 520 C 500 C2

70 38 430 C 390 C

1 100 38 420 C 350 C

500

200 2 . 22.5 = 155

200 2 .21.43 =157.14

= 200

60


16/20

E 4 S (2)

16

A

( )

A

( )

. A4 :B

300 160

60

. A7 :B

600 300

60

2 40 38 520 C 500 C2

70 38 430 C 390 C

100 38 420 C 350 C

500

200 2 . 22.5

= 155 200 2 .21.43 =157.14


17/20

E 4 S (2)

17

A

( )

A

( )

. A4 :B

300 160

60

. A7 :B

600 300

60

2 40 38 520 C 500 C2

70 38 430 C 390 C

100 38 420 C 350 C

500

200 2 . 22.5

= 155 200 2 .21.43 =157.14


18/20

E 4 S (3)

T :

F (T) = 2 . A . , (T) + 2 . A . , (T) + A . , (T)= 2 . 78.53 . 365 N/ + 2 . 78.53 . 475 N/ + 78.53 . 475 N/= 169.232 N

T :

F (T) = (T) . 0.8 . . = 155 . 0.8 . 30 N/ . = 3720 N/ .

18

( ) ( )

420 0.95 475 N/

430 0.95 475 N/ 520 0.73 365 N/


19/20

E 4 S (4)B .F (T) = F(T) 169232 N = 3720 N/ .

F : = 169232 N / 3720 N/ = 45.49

T : = (0.8 . ) / 2 = 462 0.8 . 45.49 /2 = 443.8

F , MR (T) = F(T) . = 169.232 N . 0.4438 = 75.1 N

T ( 2 = 0.3) :

ME (T) = (2.5 N/ + 0.3 . 22.4 N/ ) . (4 ) / 8 = 18.44 N .O :ME (T) = 0.7 . ME = 0.7 . 73.95 N = 51.765 N

.

19


20/20

E 4 S (5)T 2%

1 4.2 EN 1992 1 2 .

A 3.5 , 32.04 3.204 % . T ,

.

20

= 3.5

= ?

3.5

( )=

= 3.5

( )

= 3.5

45.49(462 45.49)

= 32.04

Documents

ConcreteExercises_Lesson6