Structural Engineering & Statics
where the load goes
Series

Dynamic amplification — the series

One essay so far on this idea, and more questions about it than one essay answers.
  1. 20 kN applied at once and held, on a structure of 0.500 s period. Displacement against time for a single-degree-of-freedom structure of natural period 0.500 s and 2.0% damping, under 20 kN applied at once and held. The static deflection under the same peak force is 12.67 mm and the peak response is 24.56 mm — a factor of 1.94.

    Twice the deflection, for the same load

    A weight placed gently on a beam deflects it by one amount. The same weight let go from rest, a millimetre above the same beam, deflects it by twice as much — and the factor of two is exact, for every structure ever built.

    part 1 · dynamics

All series