Application of Seismic Geostatistics to Improve the Territorial Infrastructure Resilience and Sustainability

Abstract

The geostatistical methodology proposed in this article is able to provide quantitative data of the ground vibrational movements to the decision support systems to determine the priorities of the seismic interventions adaptation of existing transport infrastructures but also in the design phase of new infrastructures. This paper shows the use of geostatistics to estimate the arrival time and the value of the ground acceleration peak of the vertical and epicentral oscillation components of the Norcia earthquake of 2016. The validity of the non-stationary geostatistical methodology is confirmed by the calculated estimation errors in the 38 sites of the accelerometric stations and used to verify the representativeness of the estimated data. The histogram of the 38 normalized estimation errors is close to a Gaussian distribution with the frequency of the ± σck class of 73.7% instead of 68.3%. This result was obtained for both seismic variables treated, arrival time of the maximum acceleration and peak ground acceleration value (PGA).

Geostatistical Modeling of Seismic Actions on the Structural Components of the San Benedetto Road Tunnel, Italy

“…The geographic variability of seismic residues is proportional to the lithological heterogeneity of the volumes of rock crossed by the seismic waves. For the authors, the variance of local dispersion of seismic residues is a correct indicator of the complex and undetectable geometry of the stratigraphic surfaces and the heterogeneity of rocks and soils outcropping [3]. And the origin of the local indeterminacy of ground shaking intensity is the unbridgeable difference between the amount of information needed to solve the complexity of the geostratigraphic system with sufficient approximation and the seismic information contained in the available data.…”