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[Subject Prev][Subject Next][Thread Prev][Thread Next] Teresa,

    Check out what they're doing for the new parking structures at San Francisco International Airport, which has more than its share of San Andreas and Hayward faults.  I believe Degenkolb is the design engineer.

   The new technologies utilizing precast and post-tensioning (that were pioneered, I believe, with NSF funding, jointly with US and Japanese researchers) are, in my opinion, the very best for seismic.  The connections are high quality and workmanship is controlled in the "yard" during fabrication; and they tend to "recenter" themselves quite admirably.  I can't give you more details, but I'm sure others can help.

James Bela

Oregon Earthquake AwarenessTM        /      The Quake NorthwestTM
"We Have Nothing to Fear But Shear Itself"        /        "We're All Subducting In This Together"
           "Do not look back in anger, or forward in fear, but around in awareness."  -- James Thurber

Teresa Dellies wrote:

What are the most current references and programs to use for the design of a four story structure with upper 3 stories for parking in a seismic zone 4 (1997 UBC). We are considering a post-tensioned concrete structure with concrete shear walls. We will have occupied space on the first level with 40-55 foot clear spans. What computer programs would be recommended to use for the design of the post-tensioned members? Are post-tensioned beams the appropriate choice for this type of structure? Are structural Tees readily available? Any good references about the design of parking structures in seismic zone 4? All comments and recommendations are welcome and will be appreciated!
Thank you,
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