California State University Northridge  College  of  Engineering  &  Computer  Science  * Department  of  Civil  &  Manufacturing  Engineering

Welcome  to  the  HOT TOPIC   in  Earthquake  Engineering  # 2-b3 !

Performance  Summary  of  Base  Isolated  3-story  Town  House  Building  at  the  1994

Predicted Performance for a 1000-year return period earthquake with  PGA=0.5g,  MMI=IX

Recorded Performance in transverse direction with PGA=0.44g at basement and MMI=VIII at the building site

Fixed-base building (design)

Base-isolated building  (design)

SDOF fixed-base model, 5% damping

Real base-isolated building

Predicted  MiF = 4.07

Recorded  MiF = 0.79

RESUME: In sense of average peak accelerations, the building performed  21% worse than     its non-isolated hypothetical counterpart. The structural accelerations at this MMI VIII event did     happen to be  0.57g / 0.27g = 2.1 times larger than those predicted for the postulated MMI IX    event while mitigation factor MiF  happened to be  4.07 / 0.79 = 5.15 times smaller.

Your questions on this page may be emailed to: valentin.shustov@csun.edu. You may also visit Dr.Shustov's  Home Page  or  Research Page   or  "HOT TOPICS". Our address is: CME, 18111 Nordhoff Street, Northridge, California 91330-8347

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This page was last updated on 8/16/99