ojaiswalvnit
SEFI Member
Joined: 26 Jan 2003
Posts: 9
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 Posted: Mon Sep 20, 2004 11:20 amPost subject: Z/2 and R |
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In the code, values of response reduction factor R and zone factor Z/2 have been mutually adjusted. This adjustment shall be removed. Z/2 shall be made as Z and values of R shall be doubled. This will make things more logical.
As per present code, PGA for DBE in the most severe zone is 0.18 = 0.36/2, which is much smaller when compared with any other international code and even some of the recorded earthquakes in India in zone V have shown PGA greater than 0.18.
On the other hand values of R for SMRF is 5 which is again much smaller than values given in other codes. IBC takes R = 8 and New Zealand code has R = 10 for SMRF.
Jaiswal
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