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Seism zones in France

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Eurocodes

SIA

Eurocode 8 Seismic zones in France

Seismic zoning map to consider in France With Lisa.blue, get eurocode seism zone per commune in France

Reference peak ground acceleration on type A ground in m/s², by zone according to Art. 4, Arrêté du 22/10/2010 modifié par Art.1, Arrêté du 15/09/2014
Zones 1 2 3 4 5
Reference peak ground acceleration agr on type A ground in m/s² 0,4 0,7 1,1 1,6 3,0

Values of the periods and soil factor describing the shape of the horizontal response spectra
Ground type Zones 1 to 4 Zones 5
S TB(S) TC(S) TD(S) S TB(S) TC(S) TD(S)
A 1,0 0,03 0,2 2,5 1,0 0,15 0,4 2,0
B 1,35 0,05 0,25 2,5 1,2 0,15 0,5 2,0
C 1,5 0,06 0,4 2,0 1,15 0,2 0,6 2,0
D 1,6 0,1 0,6 1,5 1,35 0,2 0,8 2,0
E 1,8 0,08 0,45 1,25 1,4 0,15 0,5 2,0

Values of parameters describing the shape of the vertical response spectra
Seismicity zone avg / ag TB(S) TC(S) TD(S)
Zones 1 to 4 0,8 0,03 0,20 2,5
Zones 5 0,9 0,15 0,4 2,0
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