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Showing results for tags 'time period seismic'.
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I was just looking at ACI/ASCE method for seismic design and had a general question about this new spectrum analysis method. Quest 1 : As it says in the code to use values of (SA 0.2 sec, SA 1sec) which means generalized Time periods are taken as 0.2 for short and 1 sec for tall buildings for given site. Why these time period values are generalized? Isn't it very common for a structure to have a time period way greater than 1 sec?. How we design for buildings having more than (say) 30 stories if we restrict its time period to just 1 sec (maximum)? Quest 2: What is difference between fundamental time period (usually varies from 0.7 to 1.X) which we find as a result, and the one we use in the ETABS seismic data (i.e. 0.030 for concrete)?
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I came across this very useful article. Here is the summary of the article: Thanks. Location of Base for Seismic Design.pdf
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- highrise with basements
- seismic design basement
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