Ared = Ab + ∑α Asi - ,
Sred = Abyb + ∑α Asi ysi
,
y = Sred/ Ared -
,
Ired = Ib + Ab (yb - y)2 + ∑α Asi (ysi - y)2
,
Wred = Ired/ y
,
W/red = Ired/ (h - y)
,
r = Wred/ Ared
,
r/ = W/red/ Ared
, b x h, | , N, | , b, | , s, | |||
300 300 | 20 | 4Æ 18 AII | ||||
300 300 | 25 | 4Æ 18 AII | ||||
300 300 | 30 | 4Æ 18 AII | ||||
300 300 | 20 | 4Æ 20 AII | ||||
300 300 | 25 | 4Æ 20 AII | ||||
300 300 | 30 | 4Æ 20 AII | ||||
300 300 | 20 | 4Æ 22AII | ||||
300 300 | 25 | 4Æ 22 AII | ||||
300 300 | 30 | 4Æ 22 AII | ||||
400 400 | 20 | 8Æ 16 AIII | ||||
400 400 | 25 | 8Æ 16 AIII | ||||
400 400 | 30 | 8Æ 16 AIII | ||||
400 400 | 20 | 8Æ 18 AIII | ||||
400 400 | 25 | 8Æ 18 AIII | ||||
400 400 | 30 | 8Æ 18 AIII | ||||
350 350 | 20 | 4Æ 25 AIII | ||||
350 350 | 25 | 4Æ 25 AIII | ||||
350 350 | 30 | 4Æ 25 AIII | ||||
350 350 | 20 | 4Æ 28 AIII | ||||
350 350 | 25 | 4Æ 28 AIII | ||||
350 350 | 30 | 4Æ 28 AIII | ||||
350 350 | 20 | 4Æ 32 AIII | ||||
350 350 | 25 | 4Æ 32 AIII | ||||
350 350 | 30 | 4Æ 32 AIII | ||||
400 400 | 20 | 4Æ 36 AIII |
2
. .
|
|
Α = Es/Eb - ,
Ared = Ab + ∑ αAs ,
Sred = Ab∙yb + ∑α Asys ,
y = Sred / Ared
,
Ired = Ib + Ab(yb- y)2 + ∑ αAs (ys- y)2
,
Wred = Ired/ y ,
W/red = Ired/ (h -y) ,
r t = Wred/ Ared
,
r b = W/red/ Ared
,
i = - .
.
, b x h, | , b, | , s, | |||||
As1 | As2 | y s1 | ys2 | ||||
300 600 | 3Æ 32 | 2Æ 28 | |||||
300 600 | 3Æ36 | 2Æ25 | |||||
300 600 | 3Æ28 | 2Æ25 | |||||
300 600 | 3Æ25 | 2Æ25 | |||||
300 600 | 3Æ28 | 2Æ22 | |||||
300 600 | 3Æ32 | 2Æ28 | |||||
300 600 | 3Æ28 | 2Æ25 | |||||
300 600 | 3Æ22 | 2Æ20 | |||||
300 600 | 3Æ28 | 2Æ25 | |||||
400 800 | 4Æ 32 | 2Æ 28 | |||||
400 800 | 4Æ32 | 2Æ25 | |||||
400 800 | 4Æ36 | 2Æ28 | |||||
400 800 | 4Æ32 | 2Æ32 | |||||
400 800 | 4Æ36 | 2Æ32 | |||||
400 800 | 4Æ40 | 2Æ28 | |||||
350 750 | 3Æ 32 | 2Æ 28 | |||||
350 750 | 3Æ32 | 2Æ25 | |||||
350 750 | 3Æ28 | 2Æ28 | |||||
350 750 | 3Æ25 | 2Æ25 | |||||
350 750 | 3Æ28 | 2Æ25 | |||||
350 800 | 3Æ 32 | 2Æ 28 | |||||
350 800 | 3Æ28 | 2Æ22 | |||||
350 800 | 3Æ25 | 2Æ25 | |||||
350 800 | 3Æ32 | 2Æ28 |