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Recent content by ssiguy

  1. ssiguy

    Static shear modulus based on geophysical results

    What you get from a geophysical survey such as MASW is the small strain shear modulus, Gdyn or G0. The static shear modulus, Gstat or Greduced, depends on the level of shear strain expected for you foundation/application. Shear modulus degrades as a function of shear strain and the type of soil...
  2. ssiguy

    Can someone help me better understand "mobilization" of deep foundation capacities?

    I agree with EireChCh. It is not unusual to consider both skin friction and end bearing for the design of drilled shafts. Jomaa Ben Hassine, PE President Civil Renewables, Inc. http://www.civilrenewables.com
  3. ssiguy

    PE License renewal and continuing education

    For licensing information, you might want to check the NCEES site: http://www.ncees.org/licensure/licensing_boards/ The following site also has a good comiplation of resources: http://www.pevault.com/ Regarding best deals on continuing eduction, MissouriPE seems to have summed up all the tips...
  4. ssiguy

    Strength Gain beyond 3 Days

    I recently came across an unusual case while reviewing the log of break strengths. For a 5000 psi concrete, that strength was reached in less than 3 days with very little strength gain afterwards. Literature says concrete should be at about 0.7 of its long-term strength at 7 days. I realize the...
  5. ssiguy

    Rock Anchors

    Your are welcome moe333. For active anchors, the idea is that there is sufficient pre-load in the anchor that it will never be exceeded by the applied load. That means the anchor is pre-loaded with the design load plus any accounting for losses. Besides the FHWA link provided earlier in the...
  6. ssiguy

    Rock Anchors

    In response to BigH, anchors are post-tensioned to address fatigue. This is critical for cyclic or dynamic loads. If the anchor is passive, repeated load/unload would unravel its capacity fairly quickly. When it is tensioned, the anchor would not feel much load until that pre-tensioned load is...
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