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Soil-Structure Interaction

  1. Aug 6, 2018 #1
    Stiff soil like tuff rock is said to be in resonance with short storey buildings (like 2 to 3 storey).. meaning during seismic movement the response in the short storey buildings would be greater. Is there any formula that can relate the two... like does stiff soil has the same frequency as short storey buildings when they shake??
     
  2. jcsd
  3. Aug 7, 2018 #2

    davenn

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    Hi ya

    I'm not going to personally give an answer when there is so much more professional info online
    have a look at some of these links


    https://www.researchgate.net/public...c_Response_at_Soft_Ground_Sites_Bay_of_Plenty

    https://www.researchgate.net/public...mic_Response_of_Subway_Station_in_Soft_Ground

    https://www.ijser.org/researchpaper/Evaluation-of-seismic-response-of-a-building-with-soft-story.pdf

    https://www.pwri.go.jp/eng/ujnr/joint/33/paper/61sato.pdf

    https://pubs.usgs.gov/of/1996/ofr-96-0263/localeff.htm

    http://users.ntua.gr/gbouck/downfiles/geot_earthquake_eng_Ch4-SITE-ADERS-10.pdf


    There's just a small collection of dozens of sites


    Dave
     
  4. Aug 15, 2018 at 4:54 AM #3

    Baluncore

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    For a specified seismic wave, the frequency spectrum of the vibration is the same, but the amplitude of oscillation is greater in slower rocks.

    The foundations of small buildings do not need to be deep, so are often just the low velocity surface soil covered by a concrete slab. The foundations of tall buildings are dug well down below the low velocity weathered soil, onto deeper fast rock.

    So small buildings tend to be shaken by greater amplitude waves than tall buildings. A tall building built on a low velocity rock, such as a volcanic tuff, will be shaken significantly more than if it were securely founded on a fast granite.
     
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