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IBRACON Structures and Materials Journal • 2013 • vol. 6 • nº 1
Considerations about the determination of
g
z
coefficient
subject have not been done, we believe this to be very logical and rational
alternative for taking into account how second order effects vary accord-
ing to how high storeys in reinforced concrete buildings are.
8. Bibliographical references
[01] ANSYS, Inc. Theory Reference (Release 9.0), 2004.
[02] ASSOCIAÇÃO BRASILEIRA DE NORMAS TÉCNICAS.
NBR 6118 – Projeto de estruturas de concreto -
Procedimento
.
Rio de Janeiro, 2007.
[03] ASSOCIAÇÃO BRASILEIRA DE NORMAS TÉCNICAS.
Projeto de revisão da NBR 6118 – Projeto de estruturas
de concreto
.
Rio de Janeiro, 2000.
Table 6 – Values obtained for the
and B coefficients and structure classification
z
2
Building
Direction
Parameter
Value
Classification
I
X
z
1.19
Sway structure
B
2,avg
1.15
Structure very sensitive
to horizontal movement
B
2,max
1.28
Y
z
1.14
Sway structure
B
2,avg
1.13
Structure very sensitive
to horizontal movement
B
2,max
1.20
II
X
z
1.32
Sway structure
B
2,avg
1.29
Structure very sensitive
to horizontal movement
B
2,max
1.47
Y
z
1.16
Sway structure
B
2,avg
1.17
Structure very sensitive
to horizontal movement
B
2,max
1.22
III
X
z
1.06
Nonsway structure
B
2,avg
1.05
Structure almost insensitive
to horizontal movement
B
2,max
1.07
Y
z
1.32
Sway structure
B
2,avg
1.29
Structure very sensitive
to horizontal movement
B
2,max
1.44
IV
X = Y
z
1.30
Sway structure
B
2,avg
1.26
Structure very sensitive
to horizontal movement
B
2,max
1.45
V
X
z
1.17
Sway structure
B
2,avg
1.15
Structure very sensitive
to horizontal movement
B
2,max
1.23
Y
z
1.28
Sway structure
B
2,avg
1.28
Structure very sensitive
to horizontal movement
B
2,max
1.35
VI
X
z
1.27
Sway structure
B
2,avg
1.25
Structure very sensitive
to horizontal movement
B
2,max
1.40
Y
z
1.14
Sway structure
B
2,avg
1.14
Structure very sensitive
to horizontal movement
B
2,max
1.18
[04] FRANCO, M.; VASCONCELOS, A.C. Practical
assessment of second order effects in tall buildings.
In: COLOQUIUM ON THE CEB-FIP MC90, Rio de
Janeiro.
Proceedings
, p.307-323, 1991.
[05] VASCONCELOS, A.C. Revisão da NB-1: O problema
dos efeitos de 2ª ordem. Jornal TQS News, n.3, Out.,
p.10-11, 1996.
[06] VASCONCELOS, A.C. Em que casos não se deve
aplicar o processo simplificado do
g
z
para determinação
dos efeitos de 2ª ordem?. In: SIMPÓSIO DE
ATUALIZAÇÃO SOBRE A NOVA NB-1, Belo Horizonte,
2002.
[07] OLIVEIRA, D.M. Estudo dos processos aproximados