Algeria Table 1
Zone Acceleration Coefficient A

Group*

Zone

I

IIa

IIb

III

1A

0.15

0.25

0.30

0.40

1B

0.12

0.20

0.25

0.30

2

0.10

0.15

0.20

0.25

3

0.07

0.10

0.14

0.18

* Group in Importance Classification (See Table 8)

 

Algeria Table 2
Characteristic Period T1 and T2 associated to Site Category

Site

S1

S2

S3

S4

T1(sec)

0.15

0.15

0.15

0.15

T2(sec)

0.30

0.40

0.50

0.70

 

 

Algeria Table 3
Critical Damping Ratio ξ (%)  

Infill

Frames

Shear Walls or Walls

Reinforced Concrete

Metal

Reinforced Concrete/ Masonry

Light

6

4

10

Heavy

7

5