Eurocode 8-compatible synthetic time-series as input to dynamic analysis

Mathieu Causse (1) , Aurore Laurendeau (2) , Mathieu Perrault (1) , John Douglas (3) , Luis Fabian Bonilla (4) , Philippe Guéguen (1)

1 ISTerre - Institut des Sciences de la Terre
2 Risques - Risques
3 BRGM - Bureau de Recherches Géologiques et Minières (BRGM)
4 IFSTTAR/GERS/SV - Séismes et Vibrations

Nonlinear dynamic analysis of existing or planned structures often requires the use of accelerograms that match a target design spectrum. Here, our main concern is to generate a set of motions with a good level of fit to the Eurocode 8 (EC8) design spectra for France. Synthetic time series are generated by means of a non-stationary stochastic method. To calibrate the input parameters in the stochastic approach, we select a reference set of accelerograms for a Eurocode 8 type B site category from the PEER Ground-Motion Database, which are then adjusted to the target spectrum through wavelet addition. Then, we compute nonlinear seismic responses of a soil column, including pore pressure effects, and brittle and ductile structures to the stochastic time-series, the natural accelerograms and timeseries generated using stationary stochastic approaches. The results of these calculations reveal considerable variability in response despite the similarities in terms of spectral acceleration.

Mots clés: Eurocode 8 (EC8); spectrum-compatible time-series; nonlinear site response; structural response; variability

Domaines: Planète et Univers [physics]; Sciences de la Terre; Géophysique [physics.geo-ph]; Physique [physics]; Physique [physics]; Géophysique [physics.geo-ph]; Sciences de l'environnement; Milieux et Changements globaux

Mathieu Causse, Aurore Laurendeau, Mathieu Perrault, John Douglas, Luis Fabian Bonilla, et al.. Eurocode 8-compatible synthetic time-series as input to dynamic analysis. Bulletin of Earthquake Engineering, 2014, 12 (2), pp.755-768. ⟨10.1007/s10518-013-9544-2⟩. ⟨hal-00878538⟩