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http://hdl.handle.net/2122/13596
Authors: | D'Amico, Maria* Schiappapietra, Erika* Lanzano, Giovanni* Sgobba, Sara* Pacor, Francesca* |
Title: | Fling-step recovering from near-source waveforms and ground displacement attenuation models | Issue Date: | 7-May-2020 | Publisher: | egu | DOI: | 10.5194/egusphere-egu2020-22285 | Keywords: | strong-motion ground displacement fling-step permanent displacement |
Abstract: | We present a processing scheme (eBASCO, extended BASeline COrrection) to remove the baseline of strong-motion records by means of a piece-wise linear de-trending of the velocity time history. Differently from standard processing schemes, eBASCO does not apply any filtering to remove the low-frequency content of the signal. This approach preserves both the long-period near-source ground-motion, featured by one-side pulse in the velocity trace, and the offset at the end of the displacement trace (fling-step). Hence, the software is suitable for the identification of fling-containing strong-motion waveforms. Here, we apply eBASCO to reconstruct the ground displacement of more than 400 three-component near-source waveforms recorded worldwide (NESS1, http://ness.mi.ingv.it/; Pacor et al., 2019) with the aim of: 1) extensively testing the eBasco capability to capture the long-period content of near-source records; 2) calibrating attenuation models for peak ground displacement (PGD), 5% damped displacement response spectra (DS), permanent displacement amplitude (PD) and period (Tp). The results could provide a more accurate estimate of ground motions, to be adopted for different engineering purposes such as performance-based seismic design of structures. |
Appears in Collections: | Conference materials |
Files in This Item:
File | Description | Size | Format | |
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eBASCO_EGU2020.pdf | Poster | 895.26 kB | Adobe PDF | View/Open |
EGU2020-22285-print (2).pdf | Abstract | 290.55 kB | Adobe PDF | View/Open |
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