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.
Results
Showing 1 to 14 of 14 for “"HVSR"”.
-
Microtremor recordings in Northern Mississippi: Evaluating site effect and correlating with wave climate
… the horizontal to vertical spectral ratio (HVSR) method is applied to find the predominant frequency (f0) and roughly estimate amplification factor as HVSR value at f0 (HVSR@f0). Within Northern Mississippi area, the f0 is tightly correlated with unconsolidated sediments thickness (UST) and …
-
Seismic site characterization via joint modeling of horizontal-to-vertical spectral ratios and surface wave dispersion : developing and validating a geophysical tool for deciphering Quaternary stratigraphic architecture of the Monahans dune field, West Texas.
… using Horizontal-to-Vertical Spectral Ratios (HVSR) and surface wave dispersion offer a cost-effective alternative to deciphering Quaternary architecture, but inverse models are subject to ambiguity and nonuniqueness. We jointly model HVSR and surface wave phase velocity dispersion measurements …
-
Seismic site characterization through joint modeling of complementary data functionals, with applications to Santo Domingo, Dominican Republic.
… of horizontal to vertical spectral ratios (HVSR) and surface wave dispersion, performed via refraction microtremor (ReMi). Fitting of data functionals by synthetics is driven by global optimization. The products of this approach are shear wave velocity profiles for the subsurface, …
-
Integrated protocol for ground and structures condition assessments using ambient vibration
… of Horizontal to Vertical Spectral Ratio (HVSR) and Fourier Amplitude Spectra (FAS) via GEOPSY software. Started by ground condition assessment protocol, the soil classification, soil thickness, and microzonation maps were determined for local soil condition. Meanwhile, in structural …
-
A study of the seismic behaviour of geomorphological features using ambient noise measurements
… Micromed Tromino® portable seismograph. The HVSR method (Horizontal-to-Vertical Spectral Ratio) was used to investigate ground amplification, while the covariance matrix method was used to estimate the polarization characteristics of ground motion and thus investigate any directional effects. …
-
Site Response Characteristics of Compacted Gravel Fill in Iceland
… using the horizontal-to-vertical spectral ratio (HVSR) technique over a bandwidth of 0.3 to 25 Hz. Generally, the pre-excavation condition had a predominant site frequency between 3.5 and 7 Hz with relative amplification between 3.8 and 3.9 times. The placement of gravel fill atop dense to very …
-
Development of Data-driven Models to Predict Vs30 from mHVSR
… horizontal-to-vertical spectral ratio (mHVSR) measurements to predict the time-averaged 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 …
-
Microzonazione sismica di livello III in contesti archeologici: metodologie integrate per la protezione del patrimonio di Pompei
… di indagini specifiche comprendente misure MASW, HVSR, rilievi GNSS e video-ispezioni di pozzi antichi. Sulla base del modello geologico e geotecnico ricostruito, sono state eseguite analisi bidimensionali di risposta sismica locale tramite accelerogrammi selezionati per diversi periodi di ritorno …
-
Natural frequencies evaluation on existing reinforced concrete bridges using microtremor testing
… and Horizontal-To-Vertical-Spectra-Ratio (HVSR) analysis for ground natural frequencies, fo. The natural frequency results for Sungai Sembrong Bridge (70 meter) was 2.2 Hz and for Sungai Simpang Kiri Bridge (75 meter) was 2.0 Hz, while the ground natural frequencies were 1.4 Hz to 2.1 Hz at …
-
Enhancements in earthquake ground motion assessment through regional Vₛ₃₀ characterization and Vₛ₃₀ scaling
… use of Horizontal-to-Vertical Spectral Ratio (HVSR) measurements to identify and correct the potential bias in the P-wave seismogram estimated Vₛ₃₀. A Texas-specific Vₛ₃₀ map is created using a region-specific geologic proxy, geostatistical kriging, and observations of Vₛ₃₀ measurements and …
-
Approaches to earthquake scenarios validation using seismic site response
A seismic hazard assessment was carried out for the Catania and Siracusa towns providing a comprehensive re-examination and re-processing of all the available seismic data. The site approach and the seismotectonic one were used and compared. The hazard assessment, using both methods, was performed …
-
Studio del comportamento statico e dinamico dei sistemi galleria-terreno-strutture in elevazione in ambiente urbano
Al giorno d'oggi, è sempre più evidente la necessità di costruire strutture in sotterraneo per contrastare le problematiche relative alle reti di trasporto e all’inquinamento atmosferico. Così, negli ultimi cinquant'anni, grande attenzione è stata dedicata alla costruzione di strutture …
-
Seismic site characterization using broadband and DAS ambient vibration measurements on Mt Etna, Italy
Both horizontal-to-vertical (H/V) spectral ratios and the spatial autocorrelation method (SPAC) have proven to be valuable tools to gain insight into local site effects by ambient noise measurements. Here, the two methods are employed to assess the subsurface velocity structure at the Piano delle …