Cuba  [ Back to Seismic Design Code Index ]   [ Back to Country Index ]
Code Name

New Proposal of Cuba Seismic Code

Issued by

National Council for Seismic Code

Revision

1995

Horizontal Base Shear  

where:

A : Maximum value of acceleration corresponding to an  specific seismic zone  
     (See Table 1, Table 2)

I
: Building Importance Coefficient  (See Table 3)
Rd
: Ductility factor corresponding to required ductility levels (See Table 4, Table 5)
W
: Weight of the building
C
: Spectral seismic coefficient given by the following formula (See Table 6).  
      The value of Ceait be less than 0.45.

C = 1 + (Fa – 1) T/T1      0 ≦ T ≦ T1
C = Fa                            T1 ≦ T ≦ T2
C = Fa (T2/T) p                              
T > T2

where:

Fa : amplification coefficient depending on soil profile.
T
: period of the structure
P
: expectable exponent

 Soil Classification
          Soil conditions are classified into four categories in Cuba (See Table 7)