Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 9 of 9 for “"VS30"”.
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Development of Data-driven Models to Predict Vs30 from mHVSR
… shear-wave velocity in the upper 30 meters (VS30) using data-driven models. We develop a dataset comprising 536 sites with 2,861 three-component ambient noise recordings from global regions, including New Zealand, Taiwan, Italy, Ecuador, Mexico and the United States. The identically processed …
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Sensitivity tests between Vs30 and detailed shear wave profiles using 1D and 3D site response analysis, Las Vegas Valley
… time-averaged shear-wave velocity to 30 m depth "Vs30" for site-class has become a critical parameter in site-specific and probabilistic hazard analysis. Yet, the general applicability of Vs30 can be ambiguous and much debate and research surround its application. In 2007, in part to mitigate the …
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A comparison of proxies for seismic site conditions and amplification for the large urban area of Santiago de Chile
… the shear wave velocity in the uppermost 30 m (vs30) and the slope of topography, a new technique recently proposed by Wald and Allen (2007), exists on a local scale. While one lithology might provide a greater scatter in the velocity values for the investigated area, almost no correlation …
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Refraction Microtremor Analysis of Areas Surrounding California State University San Bernardino
… wave velocity values for the top 30 meters (Vs30) of the subsurface. This depth of investigation has proven to be an effective means in determining subsurface conditions. ReMi profiles were situated 0.25 to 2.0 miles away from the San Andreas Fault, and in some instances, strategically …
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Nonlinear site amplification functions for Central and Eastern North America
… shear wave velocity in the top 30 m of a site (VS30), site natural period, soil depth, and site nonlinearity which can be coupled with empirically-developed linear empirical amplification models. Including site natural period into the amplification function is shown to greatly improve estimates …
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Seismic hazard assessment in Central Asia
… for Bishkek, Kyrgyzstan, by using a proxy of Vs30 that has been estimated from in-situ seismic noise array analyses, and considering response spectral ratios calculated by analysing a series of earthquake recordings of a temporary seismic network. To highlight the spatial variability of the …
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Conventional and deep learning-based site amplification models for central and eastern North America
… shear wave velocity in the top 30 m of a site (VS30) is proposed for linear RS amplification, and all the linear RS functions are applied to FAS amplification to suggest an alternative set of models. The standard deviation for ANN-based and conventional models are proposed, and the improvements …
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Αστικό δίκτυο επιταχυνσιογράφων της Πάτρας (UPAN) : εγκατάσταση, ανάπτυξη βάσης δεδομένων και επεξεργασία καταγραφών
… Vs, το οποίο επέτρεψε την εκτίμηση της τιμής Vs30 και την κατηγοριοποίηση του εδάφους σε οποιαδήποτε θέση του αστικού χώρου. Πραγματοποιήθηκαν επίσης εργαστηριακές δοκιμές συντονισμού με σκοπό να καθοριστεί η μη-γραμμική συμπεριφορά του εδάφους, δηλαδή οι καμπύλες G/G0-γc και D-γc. Επιπλέον, …
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Empirical nonlinear site response applicable to Greater Vancouver, British Columbia
In Greater Vancouver, strong earthquake shaking has not been recorded to quantify expected nonlinear soil response. Earthquake horizontal to vertical spectral ratios (eHVSR) are evaluated at seismic stations located at the edges or deeper center of sedimentary basins in Mexico City, the Kanto basin …