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1. Definition
The main aim of this document is to quantify the dynamic amplification of a time-dependent force F (t ) or time-dependent acceleration A (t ) (accelerogram), a type of stress found in many studies (earthquake, water hammer, shock, explosion, etc.).
Dynamic amplification expresses the amplifying effects of a structure on an applied force or acceleration. It is defined as the ratio of the maximum response to the maximum load, the latter being a force F (t ) or an acceleration A (t ).
If the maximum of the load depends only on time t, the maximum of the response to this load depends on time t, the natural pulsation of the oscillator in question ω and the reduced damping ζ.
As the reduced damping ζ is often fixed (ζ = 0.05 in general for steel structures), we will lighten the writing by not making the parameter ζ explicit...
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The Ultimate Scientific and Technical Reference
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Definition
Bibliography
Software tools
PIPESTRESS version 3.8.0 (+ SPECT5 + THISTC + FHFILE6 + CREAHIST)
BEAMSTRESS version 1.2.0
Mathcad 2001
Accel_Art (calculation of an artificial earthquake accelerogram from a spectrum)
AppTdSS (transfer of earthquake spectra from a modal base)
Regulations
Eurocode 8 (NF EN 1998-1 of September 2005) "Part 1: General rules, seismic actions and rules for buildings".
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