Seismic Horizontal coefficient

[Uttar1]

Need some inputs to determine horizontal seismic coefficient (used in the design of segmental retaining wall ) based on spectral response acceleration coefficients given in IBC. Any lead is appreciated.

 

[Uttar1]

To clarify further:

AASHTO manual gives values of horizontal seismic coefficient in the form of a map.

IBC specifies Spectral Response Acceleration Coefficients (Ss and S1) for a given project area.

Is there any correlation between the two.

 

[todd2ny]

Please see attached link from the USGS. This will give you the seismic parameters you are looking for.

http://earthquake.usgs.gov/research/hazmaps/design/