Need a book? Engineering books recommendations...
Earthquake + Short circuit ?[Subject Prev][Subject Next][Thread Prev][Thread Next]
- To: "SEAOC" <seaint(--nospam--at)seaint.org>
- Subject: Earthquake + Short circuit ?
- From: "Raul Labbé" <rlabbe(--nospam--at)ctcinternet.cl>
- Date: Tue, 2 Jul 2002 23:58:33 -0600
More than once I have come to this subject, when dealing
with industrial projects involving Electric-Power facilities.
The specific issue arises in the design of foundations for a
turbo-generator, in a highly seismic area. Among the loads
affecting the system, we may handle operation loads
( in steady-sate and start-up conditions ), short-circuit and
seismic loads, in this case.
Now, for combos to produce loading cases for design,
operation loads + seismic loads, is a case to be considered,
as it is also the short-circuit + op. ( usually the higher loads ), but
the criteria that I have seen ist not considering simultaneously,
the earthquake and the short-circuit, i.e. short-circuit + seismic
loads is not a case to be considered. The very small fraction
of time for the short-circuit lasting ( less tha 1 sec ), as compared
with the strong phase of the quake, is one of the factors supporting
this approach. On the other side, I have been told by electric
engineers, that there are no reports of short-circuits produced
because of the quake, in these facilities. Nevertheless I knew of
some calculations that were considering this loading case.
If someone has an opinion and/or knows of any recommendations,
code or provisions addressing this point, I will appreciate the
Raúl Labbé S.E.
- Prev by Subject: RE: Drop Panels
- Next by Subject: earthquake effects on concrete storage tanks
- Previous by thread: Re: TEKS Screws
- Next by thread: RE: ban treated wood