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Transcript of 9-ProjCobMadParte5.pdf
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g) Dimensionamento compresso: (NBR 7190 requisito 7.3.2)
ndice de esbeltez (0 e Lim):2kgf/cm105000E =
29,87
5138
105000
38
E0
2
C
2
0 =
=
=
56,1381240 LimLim =
2C kgf/cm51=
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Banzo Superior (Barra 57):
N = 9816,27 kgf Lfl = 136,0 cm b = 7,5 cm (adotado) 2 perfis
cm17,2i12
5,7
12
bi mnmn ===
)OK(82,6217,2
136iL Limmn
fl
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=
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Banzo Inferior (Barra 24):
N = 1021,34 kgf Lfl = 133,3 cm b = 7,5 cm (adotado) 2 perfis
cm17,2i12
5,7
12
bi mnmn ===
)OK(57,6117,2 3,133iLLim
mnfl
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=
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Montante (Barra 23): N = 3676,86 kgf Lfl = 20,0 cm b = 3,8 cm (adotado) 1 perfil
cm10,1i12
8,3
12
bi mnmn ===
)OK(23,1810,1 0,20iLLim
mn
fl
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=
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Montante (Barra 45): N = 1371,45 kgf Lfl = 46,7 cm b = 3,8 cm (adotado) 1 perfil
cm10,1i12
8,3
12
bi mnmn ===
)OK(57,4210,1
7,46
i
LLim
mnfl
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=
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Montante (Barra 67): N = 526,10 kgf Lfl = 73,3 cm b = 3,8 cm (adotado) 1 perfil
cm10,1i12
8,3
12
bi mnmn ===
)OK(82,6610,1
3,73
i
LLim
mnfl
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=
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Diagonal (Barra 78): N = 28,33 kgf Lfl = 152,2 cm b = 5 cm (adotado) 2 perfis
cm44,1i12
5
12
bi mnmn ===
)OK(45,10544,1
2,152
i
LLim
mnfl
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20
Cfl0
3
2
=>
2fl
2
fl kgf/cm30,2329,87
512
=
=
,
2mn
flmn cm61,0A
30,232
33,28
2
NA
=
=
Concluso: 2 perfis (2 x 2) A = 25,00 cm2
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Diagonal (Barra 910): N = 734,70 kgf Lfl = 166,7 cm b = 5 cm (adotado) 2 perfis
cm44,1i12
5
12
bi mnmn ===
)OK(49,11544,1
7,166
i
LLim
mnfl
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20
Cfl0
3
2
=>
2fl
2
fl kgf/cm42,1929,87
512
=
=
,
2mn
flmn cm91,18A
42,192
70,734
2
NA
=
=
Concluso: 2 perfis (2 x 2) A = 25,00 cm2
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Diagonal (Barra 1112): N = 1182,08 kgf Lfl = 183,9 cm b = 5 cm (adotado) 2 perfis
cm44,1i12
5
12
bi mnmn ===
)OK(41,12744,1
9,183
i
LLim
mnfl
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20
Cfl0
3
2
=>
2fl
2
fl kgf/cm96,1529,87
512
=
=
,
2mn
flmn cm03,37A
96,152
08,1182
2
NA
=
=
Concluso: 2 perfis (2 x 3) A = 37,50 cm2
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Diagonal (Barra 1314): N = 1533,99 kgf Lfl = 203,2 cm b = 7,5 cm (adotado) 2 perfis
cm17,2i12
5,7
12
bi mnmn ===
)OK(85,9317,2
2,203
i
LLim
mnfl
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20
Cfl0
3
2
=>
2fl
2
fl kgf/cm41,2929,87
512
=
=
,
2mn
flmn cm08,26A
41,292
09,1533
2
NA
=
=
Concluso: 2 perfis (3 x 3) A = 56,25 cm2
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h) Dimensionamento trao: (NBR 7190 requisito 7.3.1)
2TfT kgf/cm87==
N = 1041,57 kgf 2 perfis
2mn
Tmn cm99,5A
872
57,1041
2
NA
=
=
Concluso: 2 perfis (3 x 7) A = 131,25 cm2
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Banzo Inferior (Barra 68): N = 9625,64 kgf 2 perfis
mnTmn cm32,55A872
,
2A ==
Concluso: 2 perfis (3 x 3) A = 56,25 cm2
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Montante (Barra 89): N = 13,65 kgf 1 perfil
mnTmn cm16,0A87
,
A ==
Concluso: 1 perfil (1 x 1) A = 9,50 cm2
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Montante (Barra 1011): N = 440,82 kgf 1 perfil
mnTmn cm07,5A87
,
A ==
Concluso: 1 perfil (1 x 1) A = 9,50 cm2
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Montante (Barra 1213): N = 814,14 kgf 1 perfil
mnTmn cm36,9A87
,
A ==
Concluso: 1 perfil (1 x 1) A = 9,50 cm2
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Montante (Barra 1415):
N = 2315,08 kgf 1 perfil
mnTmn cm61,26A87
,
A ==
Concluso: 1 perfil (1 x 3) A = 28,50 cm2
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Diagonal (Barra 56):
N = 1592,55 kgf 2 perfis
mnTmn cm15,9A872
,
2A
=
=
Concluso: 2 perfis (1 x 1) A = 9,50 cm2
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i) Resumo das dimenses:
Observao: NBR 7190 Item 10.2.1
Amn = 50 cm2 ; emn = 5 cm
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2
Observao: NBR 7190 Item 10.2.1
Amn = 18 cm2 ; emn = 2,5 cm
2
2
2
