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FEMA/ASCE prestandard[Subject Prev][Subject Next][Thread Prev][Thread Next]
- To: seaint(--nospam--at)seaint.org, FEMCCLURE(--nospam--at)aol.com
- Subject: FEMA/ASCE prestandard
- From: "David Choi" <davidtwchoi(--nospam--at)hotmail.com>
- Date: Wed, 25 Nov 1998 07:28:01 PST
- Cc: bnagarajan(--nospam--at)oshpd.cahwnet.gov, cmu(--nospam--at)ames.ucsd.edu, hhuang(--nospam--at)co.la.ca.us, kfok(--nospam--at)ursgreiner.com, Lcheng(--nospam--at)puc.sf.ca.us, rthacker(--nospam--at)dgs.ca.gov
On the issue of overturning stability, you have opened a big can of worms. All those who still live in past glories have to stop and ponder how California managed so well except by the grace of God. Most taller buildings would have larger participation from the higher mode shapes of which would reduce the net overturning due to sway reversals. However, it is not unthinkable to have Kobe type or Mexico City destructions when the ground motions are appropriately applied. John Hall of Caltech, and Paul Summerfield from Pasadena did more than suggest that a near fault event will wipe out some of the long period structures like high rises (and falls). Sincerely, David Choi 11-25-98 ______________________________________________________ Get Your Private, Free Email at http://www.hotmail.com
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