Observation of a directed resonance in soil driven by transverse rock motion

  • W. R. Stephenson DSIR Division of Land and Soil Sciences, Wellington, New Zealand

Abstract

One component of horizontal ground acceleration recorded on flexible soil during the 1968 November 1 Cook strait earthquake is shown to be well modelled as a single degree of freedom oscillator excited by the recorded component of transverse acceleration in nearby bed rock.

This is shown to be consistent with the cellular resonant mode hypothesis of seismic response of flexible soil.

The mechanical oscillator is identified as a layer of fine-grained, post-glacial alluvium of approximately 20 m thickness.

References

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Published
1989-06-30
How to Cite
Stephenson, W. R. (1989). Observation of a directed resonance in soil driven by transverse rock motion. Bulletin of the New Zealand Society for Earthquake Engineering, 22(2), 81-89. https://doi.org/10.5459/bnzsee.22.2.81-89
Section
Articles