Sesimic Maps 2

[IFRs]

Are the seismic maps available electronically? I need to determine seismic coefficients fairly often and being able to zoom in on an area would be a big help. I bought an electronic version of the whole ASCE standard but it only works on one computer (my office machine) and I'm often on my laptop away from the office. All I need are the seismic maps.

 

[IceNine]

You can find the maps here:

http://earthquake.usgs.gov/research/hazmaps/products_data/48_States/index.php

Also, you can look up the values by Latitude and Longitude.

Ice

 

[IceNine]

Here's a better link:

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

 

[NewcastleEngineer]

This link allows you to use the zipcode of the site to look up seismic coefficients for various spectral responses at different exceedance probabilities.

http://eqint.cr.usgs.gov/eq-men/html/zipcode-06.html

 

[IFRs]

A brief look at the maps there seems to show differences between them. Does ASCE 7 use of one or the other? I'm calculating seismic response of liquid storage tanks. The API 650 code refers to the mapped ASCE 7 spectral response accelerations 5% damped 0.2 seconds and 5% damped 1 second for 2% 50 year probability. The API code also uses 0.40 times the short parameter in lieu of looking it up.

 

[WillisV]

It is easier just to use the USGS Java application which allows selection of code (in your case ASCE 7) and calculates all the relevant parameters for you. See:

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

 

[JAE]

WillisV - great link. Appreciate it.

 

[WillisV]

No problem - did you forget about it from last time? ;-)

thread507-173621

 

[JAE]

heh - yes.

I just changed jobs so I'm a bit discombobulated. I've now put it on my favorites so I won't forget it.