Atos de estrutura de concreto 1
Por: fcursinosantos • 16/11/2015 • Trabalho acadêmico • 13.972 Palavras (56 Páginas) • 300 Visualizações
Viga 201 - 203
Bw = 15cm = 150mm
H = 30cm
D = H - C = 30 – 2 = 28 cm
C = 2 cm = 20 mm
Mk max = = 134,3 kn.m = 1343 cm²/tf
Jf = 1,4
Fck = 300 kgf/cm² = 0,300 cm²/tf
Tsd = 4,35 cm²/tf
Kx Lim =0,6284
1° Passo : K6
K6 = Jf. . Bw . D² = 15 . 28² = 8,757 cm²/tf[pic 1][pic 2]
Jf . Mk max 1343
2° Passo : Kx
Kx = 1,25 - 1,525 – 7,2059[pic 3][pic 4][pic 5][pic 6]
Fck . K6[pic 7][pic 8][pic 9]
Kx = 1,25 - 1,525 – 7,2059[pic 10]
0,3 . 8,757
Kx = 0,01
3° Passo : K3
K3 = 1,4 = 1,4 = 0,323 cm²/tf[pic 11][pic 12]
Tsd (1 - 0,4 . Kx) 4,35 (1 - 0,4 . 0,01)
4° Passo : As
As = K3 = Jf . Mk max[pic 13][pic 14]
Jf D
As = 0,323 . 13,43 = 0,155[pic 15]
28
As = Min = Bw . H . 0,173%
As = Min = 15 . 30 . 0,173% = 0,7785 Adotar
As = Max = Bw . H . 4%
As = Max = 15 . 30 . 4% = 18
5° Passo : Armadura[pic 16]
8 mm = 0,8 cm [pic 17]
Área = . d² = 3,14 . 0,8 = 0,50 cm[pic 19][pic 20][pic 18]
4 4
N = 0,7785 = 1,557 [pic 21]
0,50
N = 2 Barras
N 150 – 2 (6,3 + 20) + 22,8 =2,42[pic 23][pic 22]
8 + 22,8
[pic 24][pic 25][pic 26][pic 27]
0,7785 cm²[pic 28][pic 29][pic 30][pic 31][pic 32][pic 33]
[pic 34][pic 35][pic 36][pic 37]
0,7785 cm²[pic 38]
[pic 39]
Viga 202
Bw = 15cm = 150mm
H = 30cm
D = H - C = 30 – 2 = 28 cm
C = 2 cm = 20 mm
Mk max = 2,2 kn.m = 0,22 cm²/tf
Jf = 1,4
Fck = 300 kgf/cm² = 0,300 cm²/tf
Tsd = 4,35 cm²/tf
Kx Lim =0,6284
1° Passo : K6
K6 = Jf .Bw . D² = 15 . 28² =534,545 cm²/tf[pic 40][pic 41]
Jf . Mk max 22
2° Passo : Kx
Kx = 1,25 - 1,525 – 7,2059[pic 42][pic 43][pic 44][pic 45]
Fck . K6
Kx = 1,25 - 1,525 – 7,2059[pic 46][pic 47][pic 48][pic 49]
0,3 . 534,545
Kx = 0,02
3° Passo : K3
K3 = 1,4 = 1,4 = 0,324 cm²/tf[pic 50][pic 51]
Tsd (1 - 0,4 . Kx) 4,35 (1 - 0,4 . 0,02)
4° Passo : As
As = K3 = Jf . Mk max[pic 52][pic 53]
Jf D
As = 0,324 . 22 = 0,254[pic 54]
28
As = Min = Bw . H . 0,173%
As = Min = 15 . 30 . 0,173% = 0,7785 Adotar
As = Max = Bw . H . 4%
As = Max = 15 . 30 . 4% = 18
5° Passo : Armadura[pic 55]
8 mm = 0,8 cm [pic 56]
Área = . d² = 3,14 . 0,8 = 0,50 cm[pic 58][pic 59][pic 57]
4 4
N = 0,7785 = 1,557 [pic 60]
0,50
N = 2 Barras
N 150 – 2 (6,3 + 20) + 22,8 =2,42[pic 62][pic 61]
8 + 22,8
[pic 63][pic 64][pic 65][pic 66]
0,7785 cm²[pic 67][pic 68][pic 69][pic 70][pic 71][pic 72]
[pic 73][pic 74][pic 75][pic 76]
0,7785 cm²[pic 77]
[pic 78]
Viga 204 - 205
Bw = 10cm = 150mm
H = 30cm
D = H - C = 30 – 2 = 28 cm
C = 2 cm = 20 mm
Mk max = 3,9 kn.m = 0,39 cm²/tf
Jf = 1,4
Fck = 300 kgf/cm² = 0,300 cm²/tf
Tsd = 4,35 cm²/tf
Kx Lim =0,6284
1° Passo : K6
K6 = Jf Bw . D² = 10 . 28² = 301,538 cm²/tf[pic 79][pic 80]
Jf Mk max 39
2° Passo : Kx
Kx = 1,25 - 1,525 – 7,2059[pic 81][pic 82][pic 84][pic 83]
Fck . K6
Kx = 1,25 - 1,525 – 7,2059[pic 85][pic 86][pic 87][pic 88]
0,3 . 301,538
Kx = 0,04
3° Passo : K3
K3 = 1,4 = 1,4 = 0,327 cm²/tf[pic 89][pic 90]
Tsd (1 - 0,4 . Kx) 4,35 (1 - 0,4 . 0,02)
4° Passo : As
As = K3 = Jf . Mk max[pic 92][pic 91]
Jf D
As = 0,324 . 39 = 0,455[pic 93]
...