Seismic load definition

[Bozo_Sam]

Hi there. I am trying to define the seismic load using the ASCE 7. I have some troubles defining the "Ss" and "S1" parameters for my location (London)

Many thanks for help,

Uroš

 

[EireChch]

What are you designing? I have never seen a structure in the UK designed to consider seismic forces. You wont find any maps for London.

If you have a project in the UK that needs to consider seismic then you need a probabilistic seismic hazard assessment(PSHA)

 

[JedClampett]

You should delete this post and re-post in

https://www.eng-tips.com/threadminder.cfm?pid=507.

All structural, all the time and plenty of English blokes will read it.

 

[Lomarandil]

I agree with the above posts.

However, UFC 3-301-01 lists S1=4%g and Ss=13%g (PGA = 5%) for site class B in London

----
just call me Lo.

 

[EireChch]

Lo - where in this document does it provide site class for London. Did a quick text search and couldnt find.

 

[CarlB]

The current UFC no longer includes load data, it refers to a website instead:

https://www.wbdg.org/additional-resources/tools/ufcsldt