Article | REF: C251 V1

Principles of soil-structure interaction under seismic disturbance - Principles and inertial effects

Authors: Stéphane BRÛLÉ, Fahd CUIRA

Publication date: July 10, 2017, Review date: July 20, 2020

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6. Mass effect and ground radiative damping

6.1 Principle

Consider the case of a foundation, either shallow or deep, subjected to the application of a harmonic load F(t) = F 0 .sin(ωt) in a given direction.

Analysis of the foundation's dynamic response under steady-state conditions reveals a much more complex behavior than that observed under "static" loading, with, on the one hand, a "mass" effect that induces a change in apparent stiffness as a function of load frequency, and, on the other, a phase shift between load and resulting displacement synonymous with the existence of a non-zero damping term. This results from the combination of two phenomena:

  • material" dissipation of energy (damping specific to the material...

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Mass effect and ground radiative damping
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