SEISMIC MOTION INPUT METHODS OF VISCOUS-ELASTIC BOUNDARY AND NUMERICAL SIMULATION OF SEISMIC RESPONSE ON LARGE DIAMETER TUNNELS

Seismic motion input methods of viscous-elastic boundary and numerical simulation of seismic response on large diameter tunnels

To determine the selection of input wave field at the bottom of the viscous-elastic boundary, and study the seismic response of two parallel large-diameter shield tunnels, corresponding numerical models were established for analysis.First, through the study of wave method for seismic motion input of viscous-elastic boundary, several different wave

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Geological Sources of Obsidian on Lipari and Artifact Production and Distribution in the Neolithic and Bronze Age Central Mediterranean

The Aeolian island of Lipari, just north of eastern Sicily, was a major geological source of high quality obsidian that was volcanically formed in the Late Mesolithic, followed by another major production enchanted wonderstruck perfume in the 1st millennium AD.A much earlier volcanic event on Lipari also produced some obsidian, but not of sufficien

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