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Structural response to non‐stationary multiple‐support random excitation
AbstractThe seismic behaviour of large‐size structures subjected to multiple‐support excitation is studied by means of a random vibration approach. Ground motion is modelled as a non‐stationary stochastic process having an evolutionary spectral density. To describe the spatial variability of the input motion a model is adopted which accounts for finite propagation velocity and for loss of correlation as a function of distance and frequency.Structural analysis is entirely performed in the frequency domain and full advantage is taken of FFT properties and capabilities. An example is given regarding the behaviour of a 800 m long viaduct. Results are shown in terms of response evolutionary spectral density, variance and reliability with respect to a fixed threshold.
Structural response to non‐stationary multiple‐support random excitation
AbstractThe seismic behaviour of large‐size structures subjected to multiple‐support excitation is studied by means of a random vibration approach. Ground motion is modelled as a non‐stationary stochastic process having an evolutionary spectral density. To describe the spatial variability of the input motion a model is adopted which accounts for finite propagation velocity and for loss of correlation as a function of distance and frequency.Structural analysis is entirely performed in the frequency domain and full advantage is taken of FFT properties and capabilities. An example is given regarding the behaviour of a 800 m long viaduct. Results are shown in terms of response evolutionary spectral density, variance and reliability with respect to a fixed threshold.
Structural response to non‐stationary multiple‐support random excitation
Earthq Engng Struct Dyn
Perotti, Federico (author)
Earthquake Engineering & Structural Dynamics ; 19 ; 513-527
1990-05-01
Article (Journal)
Electronic Resource
English
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