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Unformatted text preview: rst natural
ω1H/V1=π/2 4 ω1=(π/2)(V1/H) The second natural
circular frequency: ω2=3 ω1
The first natural period T1
and frequency f1:
T1=2π/ ω1=(4H)/ V1
f1=1/ T1=V1/(4H) ω1 The second natural period T2 and frequency f2:
T2= T1/3 ω2 Abs. US/2EO at the
natural frequency is:
1/α When the impedance ratio
α is smaller, the
amplification at the
That is, when the surface
stratum is much softer
than the engineering
bedrock, the amplification
becomes much larger. max. Us/2Eo ω1 ω2 Dynamic Soil Structure Interaction END
One-Dimensional Shear Wave Propagation
in Two-Layered Strata Kenji MIURA, Dr. Eng.
Graduate School of Engineering
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This note was uploaded on 03/14/2014 for the course CE 5680 taught by Professor Drgrd during the Summer '14 term at Indian Institute of Technology, Chennai.
- Summer '14