A5048155219- Geotechnical Engineering and Analysis
- Geotechnical Engineering and Soil Stabilization
- Geotechnical Engineering and Underground Structures
- Geotechnical Engineering and Soil Mechanics
- Dam Engineering and Safety
- Soil and Unsaturated Flow
- Air Quality Monitoring and Forecasting
- Air Quality and Health Impacts
- Mineral Processing and Grinding
- Grouting, Rheology, and Soil Mechanics
- Landslides and related hazards
- Coal and Coke Industries Research
- Coal Combustion and Slurry Processing
- Vehicle emissions and performance
- Industrial and Mining Safety
- Healthcare and Environmental Waste Management
- Mining Techniques and Economics
- Radiative Heat Transfer Studies
- Geomechanics and Mining Engineering
- Rock Mechanics and Modeling
- Groundwater and Watershed Analysis
- Water Quality and Pollution Assessment
- Geotechnical and Geomechanical Engineering
- Environmental Policies and Emissions
- Soil, Finite Element Methods
Indian Institute of Technology BHU
2019-2024
Banaras Hindu University
2019-2024
Indian Institute of Science Bangalore
2014-2016
Central Institute of Mining and Fuel Research
1986-2002
Yahoo (United Kingdom)
2000
Bearing capacity factors because of the components cohesion, surcharge, and unit weight, respectively, have been computed for smooth rough ring footings different combinations ri/ro ϕ by using lower upper bound theorems limit analysis in conjunction with finite elements linear optimization, where ri ro refer to inner outer radii ring, respectively. It is observed that a footing given value ro, magnitude collapse load decreases continuously an increase ri. Conversely, base, hardly any...
A methodology has been presented for determining the stability of unsupported vertical cylindrical excavations by using an axisymmetric upper bound limit analysis approach in conjunction with finite elements and linear optimization. For purpose excavation design, numbers (Sn) have generated both (1) cohesive-frictional soils (2) pure cohesive soils, additional provision accounting linearly increasing cohesion depth means a nondimensional factor m. The variation Sn H/b established different...
An upper-bound limit analysis formulation has been presented for solving an axisymmetric geomechanics stability problem using the Mohr-Coulomb failure criterion in conjunction with finite elements and linear programming. The method is based on application of von Karman hypothesis, it requires only nodal velocities as basic unknown variables. computational effort needed to solve becomes almost same that required equivalent plane strain case. By proposed method, bearing capacity factors were...
Bearing capacity factors, N c , q and γ for a conical footing are determined by using the lower upper bound axisymmetric formulation of limit analysis in combination with finite elements optimization. These factors obtained form wide range values cone apex angle (β) [Formula: see text] δ = 0, 0.5[Formula: text], text]. The bearing perfectly rough (δ text]) generally increase decrease β. On contrary, 0°, reduce gradually For factor ≥ 35° becomes minimum β ≈ 90°. ≤ 30°, as case reduces an...
Abstract The aim of this article is to present the slope stability charts for two layered soil slopes by using strength reduction method (SRM). primary focus provide a quantitative estimation improvement when stronger layer placed over weaker layer. SRM carried in work comprises series finite element lower bound (LB) and upper (UB) limit analysis conjunction with nonlinear optimization. Unlike equilibrium (LEM), there no need consider any prior assumptions regarding failure surface SRM....
A lower-bound limit analysis formulation, by using two-dimensional finite elements, the three-dimensional Mohr-Coulomb yield criterion, and nonlinear optimization, has been given to deal with an axisymmetric geomechanics stability problem. The optimization was performed interior point method based on logarithmic barrier function. surface smoothened (1) removing tip singularity at apex of pyramid in meridian plane (2) eliminating stress discontinuities corners hexagon π-plane. circumferential...
The lower bound limit theorem in conjunction with finite elements is used to quantitatively estimate the pseudostatic bearing capacity of a rough strip footing placed on geogrid-reinforced sandy soil. objective this study show how will be improved seismic prone areas by (i) laying stronger soil layer beneath foundation and (ii) inserting geogrid reinforcement layers stratum. Both mass are subjected horizontal vertical acceleration. Solutions obtained for different combinations (a)...
This study presents a computational methodology for solving axisymmetric stability problems in rock mechanics by using the finite element lower bound limit analysis. The generalized Hoek and Brown (GHB) yield criterion, which is often recommended to define failure intact jointed mass, has been employed. No assumption(s) are required make either on value of circumferential stress (σθ) or exponent (α) GHB expression. It understood that assumption choosing α = 0.5 provides an unsafe solution...