A5086405665- Geotechnical Engineering and Underground Structures
- Geotechnical Engineering and Analysis
- Geotechnical Engineering and Soil Mechanics
- Geotechnical Engineering and Soil Stabilization
- Dam Engineering and Safety
- Landslides and related hazards
- Probabilistic and Robust Engineering Design
- Rock Mechanics and Modeling
- Grouting, Rheology, and Soil Mechanics
- Soil and Unsaturated Flow
- Infrastructure Maintenance and Monitoring
- Multi-Criteria Decision Making
- Seismic Performance and Analysis
- Fuzzy Logic and Control Systems
- Geological Modeling and Analysis
- Geophysical Methods and Applications
- Seismic Imaging and Inversion Techniques
- Fuzzy Systems and Optimization
- Asphalt Pavement Performance Evaluation
- Tunneling and Rock Mechanics
- Advanced Multi-Objective Optimization Algorithms
- Structural Response to Dynamic Loads
- Groundwater flow and contamination studies
- 3D Surveying and Cultural Heritage
- Geotechnical and Geomechanical Engineering
Clemson University
2014-2024
National Central University
2015-2024
University of the District of Columbia
2017-2021
University of Cincinnati
2021
Tongji University
2014-2018
China University of Geosciences
2017
Montana Technological University
2016-2017
Nanjing Tech University
2017
National Taiwan University of Science and Technology
2009-2010
National University of Singapore
2010
The impoundment of the 660-km long reservoir behind huge Three Gorges Dam, world's largest hydropower station, increased regional seismicity and reactivated severe geohazards. Before filling was initiated in 2003, region had approximately two earthquakes per year with magnitudes between 3.0 4.9; after full 2008, 14 occurred 5.4. In addition, hundreds landslides were are now a state intermittent creep. Many exhibit step-like annual pattern displacement response to quasi-regular variations...
Predictive equations for estimating normalized shear modulus and material damping ratio of Quaternary, Tertiary older, residual/saprolite soils are presented in this paper. The based on a modified hyperbolic model statistical analysis existing Resonant Column Torsional Shear test results 122 specimens obtained from South Carolina, North Alabama. Variables used the are: shear-strain amplitude, confining stress, plasticity index (PI). expressed terms polynomial function plus minimum ratio. It...
Accurate prediction of ground-surface settlement adjacent to an excavation is often difficult achieve without using accurate representation small-strain nonlinearity in a soil model within finite-element analyses. In this paper simplified semiempirical proposed for predicting maximum wall deflection, surface settlement, and surface-settlement profile due excavations soft medium clays. A large number artificial data are generated through analyses well-calibrated, model. These data, consisting...
Mountainous regions are inherently susceptible to geohazards, such as landslides and debris flows, with the threat of natural disasters compounded by human activities (mainly settlements). Lessons learned from past events that involved interactions between geohazards helpful for future site selections settlements in mountainous regions. To this end, associated county seat relocations Badong, a typical Three Gorges Reservoir region, China, studied an engineering geologist's perspective. Over...
This paper presents an assessment of existing and new probabilistic methods for liquefaction potential evaluation. Emphasis is placed on comparison probabilities calculated with two different approaches, logistic regression Bayesian mapping. Logistic a well-established statistical procedure, whereas mapping relatively application the Bayes' theorem to evaluation soil liquefaction. In present study, simplified procedures evaluation, including Seed–Idriss, Robertson–Wride, Andrus–Stokoe...
This paper presents a new simplified method for assessing the liquefaction resistance of soils based on cone penetration test (CPT). A relatively large database consisting CPT measurements and field performance observations historical earthquakes is analyzed. first used to train an artificial neural network predicting occurrence nonoccurrence soil seismic load parameters. The successfully trained tested then generate set data points that collectively define boundary surface, limit state...
A Bayesian framework using field observations for back-analysis and updating of soil parameters in a multistage braced excavation is presented. Because the uncertainties originating from poorly known parameters, imperfect analysis model, other factors such as construction variability, can only be inferred probability distributions. In this paper, these posterior distributions are derived Markov chain Monte Carlo (MCMC) sampling method implemented with Metropolis-Hastings algorithm. proposed...
The one-way cyclic triaxial test has been recognized as a useful tool for solving many engineering problems, such the prediction of deformation in subsoils under traffic loading. Most studies behavior soils are performed tests with constant confining pressure (CCP), which can apply compressive deviatoric stress only. However, real field loading includes varying normal stresses three directions. Therefore, it is more desirable to simulate situ conditions induced by passing vehicles through...
The authors investigated the effects of principal stress rotation (PSR) on traffic load–induced settlement subways in soft subsoil. Here, a series hollow cylinder tests normally consolidated, medium-plasticity clay with and without were performed along finite-element modeling simulation. results show significant increases both excess pore-water pressure cumulative deformation consolidated when PSR is present simulated, become more pronounced as maximum effective ratio or load frequency...
The loading path involving principal stress rotation (PSR) during shear is an important phenomenon encountered in many field conditions. Typically for traffic loading, both the magnitude and direction of stresses may vary with time due to motion vehicles, can be mimicked by a heart shape deviatoric space. Conventional triaxial tests are not suitable recreate this type that no torsional applied on test samples. To overcome limitation, series using hollow cylinder apparatus were conducted sand...