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CARGAS DE VENTO
EM
ESTRUTURAS DE
ALVENARIA
0101
Efeito do vento:
Estabilidade global do edifício
Resistência à flexão dos
painéis isolados de alvenaria.
0202
0303
0404
0505
ESTABILIDADE GLOBAL
0606
0707
laje apoiada em 2 direções
Sistema celular
0808
laje apoiada em uma direção
paredes de vedação
Sistema de paredes
transversais
0909
laje apoiada em 2 direções
paredes de vedação
laje apoiada em uma direção
Sistema complexo
1010
Torção em
edifícios
assimétricos
1111
1212
Paredes Dispostas Simetricamente
∑
⋅
=
++
⋅
=
I
IW
III
IW
W 1
321
1
1
1313
Paredes Dispostas Simetricamente
∑
⋅
=
I
IW
W 2
2
1414
Paredes Dispostas Simetricamente
∑
⋅
=
I
IW
W 3
3
1515
Paredes Dispostas
Assimetricamente
A
B
IA IB C IC
centro de
massa
W
CL
W
B
LC
centro de
massa
ICIBIA CA
A CIA IB IC
CL
B
W
W
e
W
Xb
Xa Xc
W
Xa Xc
Xb
∆a
∆c
∆b
1616
Xa Xc
Xb
∆a
∆c
∆b
a
ba
b
x
x⋅∆
=∆
a
ca
c
x
x⋅∆
=∆
A
A
a
IEK
hW
⋅⋅
⋅
=∆
3
'
B
B
b
IEK
hW
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⋅
=∆
3
'
K = constante de deflexão.
1717
B
B
b
a
a
IEK
hW
x
x ⋅⋅
⋅
=⋅
∆ 3'
Substituindo o valor de ∆b da equação
B
B
A
A
a
b
I
W
I
W
x
x '
'
=



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b
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x
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'
'
ou
Xa Xc
Xb
∆a
∆c
∆b
1818
soma dos momentos em relação ao centro de
torção deve ser igual ao momento torçor:
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∑ ⋅
⋅⋅⋅
=
⋅+⋅+⋅
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=
)(
' 2222
xI
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xIxIxI
xIeW
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aA
A
1919
∑∑ ⋅
⋅⋅⋅
±
⋅
= 2
xI
xIeW
I
IW
W nnn
n
2020
Roteiro para Projetos de Paredes Assimétricas
X
Y
X’i
X’i
P1 P2
P3
∑
∑=
i
íi
ct
I
xI
X
'
.
2121
Parede
No.
Ii x’i Ii.x’i xi Ii.xi Ii.x
2
i
∑
⋅
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(1)
∑⋅
⋅⋅⋅
)( 2
xI
xIeW nn
(2)
[ ]hMn .)2()1( += Y1 i
i
I
yM.
=σ
P1
P2
P3
...
...
...
Pn
∑
cgii xxX −= '
cgct xxe −=

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