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Principal direction of an earthquake

 
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Rudra Nevatia
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Joined: 26 Jan 2003
Posts: 215
PostPosted: Thu Sep 23, 2004 4:07 am    Post subject: Principal direction of an earthquake Reply with quote
--- paresh.patel@babtieindia.com wrote:

Quote:
Comment: It is desirable that specific guidelines be available for
determination of principle axis of an unsymmetrical building. But I think
there is no rational approach available by which we can find principle
direction of complex structures. For a complex three-dimensional structure,
direction of an earthquake that produces maximum stresses in a particular
member or at specific point is not apparent. For time history it is possible
to perform large number of dynamic analyses at various angles of input to
check all points for critical earthquake directions. Such an elaborate study
could consume lots of time and financial resources.


When in doubt use 100% + 30% rule. Seems to be the upper bound.

Rudra Nevatia


          
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