A5068336341- Seismic Waves and Analysis
- Seismic Imaging and Inversion Techniques
- Seismic Performance and Analysis
- Geophysics and Sensor Technology
- Geotechnical Engineering and Underground Structures
- Seismology and Earthquake Studies
- Geophysical Methods and Applications
- Coastal and Marine Dynamics
- Drilling and Well Engineering
- Multiculturalism, Politics, Migration, Gender
- Colonialism, slavery, and trade
- Structural Response to Dynamic Loads
- Archaeology and Natural History
- Ecocriticism and Environmental Literature
- Structural Health Monitoring Techniques
- American Environmental and Regional History
- African history and culture analysis
- Religion, Society, and Development
- American Constitutional Law and Politics
IDEO (United States)
2018-2024
The University of Texas at Austin
2014-2017
Surface wave methods provide a cost effective means of developing shear velocity (Vs) profiles for applications such as dynamic site characterization and seismic response analyses. However, the inverse problem involved in obtaining realistic layered earth model from surface dispersion data is inherently ill-posed, non-linear mix-determined, without unique solution. When available, priori information geotechnical boreholes or geologic well logs should be used to aid constraining site-specific...
A number of strategies exist to account for the epistemic uncertainty and aleatory variability in shear-wave velocity (Vs) profiles used site response analyses. Epistemic may be accounted by using median bounding-type (e.g., ±20%), while Vs randomization procedures. robust, quantitative method help judge how well these statistically derived represent actual subsurface stiffness or layering conditions is currently not available. This paper presents a surface-wave dispersion approach...
Uncertainty in site response analyses can be attributed to a number of parameters, including analysis methods, input ground motions, nonlinear dynamic soil properties, and shear-wave velocity profiles. In this paper, several approaches commonly used account for (Vs) uncertainty are investigated. Specifically, the Vs profiles considered categorized into three groups: (1) determined directly from surface-wave inversion, (2) simple statistical derived indirectly (including bounding-type,...
This paper documents inter-analyst uncertainty/variability in dispersion and shear wave velocity (Vs) estimates from a blind-analysis study performed on common experimental dataset of surface measurements. The consists both active-source ambient-wavefield data collected using variety linear circular arrays receivers. Analysts were allowed to process as much the desired requested report their Vs results blind manner. information was used calculate frequency-dependent uncertainty...
Deep (+500-m) shear wave velocity ( V S ) profiles were developed at 14 sites throughout Christchurch, New Zealand, using a combination of active-and passive-source surface testing. The geology Christchurch is complex and presents several challenges for Specifically, the interlayering relatively stiff gravels with soft sands, silts, clays makes (1) interpretation experimental dispersion data ambiguous (2) complicates determination appropriate inversion-layering parameterizations. In order to...
This paper details the methodologies, uncertainties, and results from analysis of UTexas1 dataset. The vertical horizontal seismic records multiple field acquisitions active-source ambient-wavefield surface wave data were processed to obtain dispersion estimates using frequency domain beamformer (FDBF), high resolution f-k (HRFK), modified spatial autocorrelation (MSPAC), refraction microtremor (ReMi) methods. Rayleigh wave, Love H/V inverted simultaneously in software Geopsy. processing...
Seismic-hazard analysis (SHA) is typically performed using ergodic ground-motion models (GMMs), wherein the site response component derived from global data and conditioned on time-averaged shear-wave velocity in upper 30 meters (VS30) a "basin depth" term (e.g., Z1.0 or Z2.5).In GMMs, for given VS30, there an implicit (VS) profile associated with prediction that has smooth increases of depth.When site-specific VS characterized by abrupt contrasts, example at rock-soil interface, likely to...
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Journal Article “Green Grass in Yellow Sky: Stephen Crane Southwest Texas” Get access David Teague Search for other works by this author on: Oxford Academic Google Scholar ISLE: Interdisciplinary Studies Literature and Environment, Volume 1, Issue 2, Fall 1993, Pages 81–92, https://doi.org/10.1093/isle/1.2.81 Published: 01 October 1993