The Role of Errors and Uncertainties, in Strong Ground Motion Parameters, in the Achievements of the European Strong Motion Database and Databank


Abstract eng:
A methodology is proposed in order to process reliable and important analog records in such a way to obtain physical displacements in the strong-phase time interval. To test the reliability of such a methodology, strong motion recordings of ground acceleration, obtained from a SMA-1 analog accelerograph, and the one obtained by a digital instrument installed in the same pillar, were analyzed in the time domain. Displacements were obtained by double integration of the acceleration and therefore analyzed. The second part of this paper underlines some possible improvements in collecting, selecting and analyzing statistical data based on strong motion recordings. As an application the original Sabetta and Pugliese database for the ground motion prediction of PGA is investigated. First a databank extension due to new digital measurement events, marked by a bigger accuracy, was implemented. Secondly a better statistical way of dealing such spatial data in ground prediction relations, making use of Geographically Weighted Regression (GWR), is illustrated. As a result a substantial reduction in epistemic uncertainty in relative hazard maps is evidenced.

Contributors:
Conference Title:
Conference Title:
16th World Conference on Earthquake Engineering
Conference Venue:
Santiago (CL)
Conference Dates:
2017-01-09 / 2017-01-13
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Text je chráněný podle autorského zákona č. 121/2000 Sb.



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 Record created 2017-01-18, last modified 2017-01-18


Original version of the author's contribution as presented on USB, paper 340.:
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