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Papers by P. K Basudhar

Research paper thumbnail of Enhancement of surfactant efficacy during the cleanup of engine oil contaminated soil using salt and multi-walled carbon nanotubes

Journal of Hazardous Materials, 2018

Research paper thumbnail of Flexural Analysis of Laterally Loaded Piles: Prediction and Performance

Geotechnical and Geological Engineering, 2018

Research paper thumbnail of Estimation of Burger Model Parameters by Inverse Analysis of Oedometer Data

Contrary to the forward analysis, inverse analysis can be effectively utilized to determine the p... more Contrary to the forward analysis, inverse analysis can be effectively utilized to determine the parameters of a constitutive model commonly used to represent the stress-strain-time behavior or the loaddeformation-time behavior of the soil. This paper reports the development of a generalized inverse analysis formulation for the parameter estimation of four-parameter Burger model. The analysis is carried out by formulating the problem as that of mathematical programming in terms of identification of the design vector, the objective function and the design constraints. Thereafter, the formulated constrained nonlinear multivariable problem is solved with the aid of fmincon: an in-built constrained optimization solver module available in MatLab. In order to gain experience, a synthetic case-study is considered wherein key issues such as the determination and setting up of variable bounds, global optimality of the solution and the minimum number of data-points required for prediction of parameters are addressed. The results reveal that the developed technique is quite efficient in predicting the model parameters. The best result is obtained when the design variables are subjected to a lower bound without any upper bound. Global optimality of the solution is achieved using the developed technique. Based on the experience gained from the synthetic study, the paper reports the determination of Burger model parameters using real-time 1-D field and laboratory oedometer data.

Research paper thumbnail of Modeling of soil–woven geotextile interface behavior from direct shear test results

Geotextiles and Geomembranes, 2010

Research paper thumbnail of Stability of a Mast Foundation: A Case Study

Research paper thumbnail of Prediction of Hydraulic Conductivity of Clay Liners Using Artificial Neural Network

Lowland technology international : the official journal of the International Association of Lowland Technology, 2007

Research paper thumbnail of Predictive Models for Estimating the Coefficient of Permeability for Sands

Research paper thumbnail of Pseudo Static Seismic Stability Analysis of Reinforced Soil Structures

Geotechnical and Geological Engineering, 2010

Research paper thumbnail of Flexural response of beams on viscoelastic foundations with predictions beyond the loading area

International Journal of Geotechnical Engineering, 2018

Research paper thumbnail of Design of geosynthetic-reinforced earth using equivalent thickness concept

The paper presents a design methodology for geosynthetic-reinforced earth using equivalent thickn... more The paper presents a design methodology for geosynthetic-reinforced earth using equivalent thickness concept. The reinforced earth or reinforced granular fill is placed on soft soil. The granular fill and the soft soil have been idealized by the Pasternak shear layer and a layer of Winkler springs, respectively. Stretched rough elastic membranes represent the geosynthetic reinforcement layers. Plane strain conditions are considered for the loading and reinforced foundation soil system. An iterative finite difference scheme is applied for obtaining the solution. Based on the result of the present study, design charts are also presented.

Research paper thumbnail of The Remigration of Romanian Children

Research paper thumbnail of Steady State Response of Beams on a Tensionless Geosynthetic-Reinforced Granular Fill-Soft Soil System Subjected to Moving Loads

SOILS AND FOUNDATIONS, 2005

Research paper thumbnail of Finite Element Simulation of Strip Footings Resting on Double Faced Wrap-Around Reinforced Soil Walls

GeoFlorida 2010, 2010

ABSTRACT

Research paper thumbnail of Liquefaction Characteristics Evaluation Through Different Stress-Based Models : A Comparative Study

The paper presents a comparative study of the predicted response of a liquefiable saturated sand ... more The paper presents a comparative study of the predicted response of a liquefiable saturated sand deposit of Nigata city under different seismic ground motion using three different stress based analytical models due to Finn et al. (1977), Liou et al. (1977), and Katsikas and Wylie (1982). The results are also compared with simplified methods that are adopted in the current design practice. It has been found that the models by Finn et al. (1977) and Katsikas and Wylie (1982) result in close predictions, whereas the predictions by Liou et al. (1977) are significantly different, particularly for predicting the rate of partial liquefaction for the chosen soil deposit and earthquake motions. INTRODUCTION Liquefaction is an earthquake-induced ground failure phenomenon observed in saturated loose sand deposits. Liquefaction involves generation of excess pore pressure, loss of shear strength and excessive volume contraction with associated settlement. Although the simple methods based on SPT...

Research paper thumbnail of Generalized solutions of axially and laterally loaded piles in elasto-plastic soil

International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts, 1974

Research paper thumbnail of The Stability of a Trapdoor

Research paper thumbnail of Direct Search for Critical General Slip Surface of Slopes with Nonlinear Strength Envelope

Geotechnical and Geological Engineering

Research paper thumbnail of A neural network model for slope stability computations

Research paper thumbnail of Reinforcement Effect on the Static Analysis of Circular Footing Resting over Winkler Elastic Foundation

Geotechnical and Geological Engineering

Research paper thumbnail of Parameter estimation of four-parameter viscoelastic Burger model by inverse analysis: case studies of four oil-refineries

Interaction and multiscale mechanics, 2012

Research paper thumbnail of Enhancement of surfactant efficacy during the cleanup of engine oil contaminated soil using salt and multi-walled carbon nanotubes

Journal of Hazardous Materials, 2018

Research paper thumbnail of Flexural Analysis of Laterally Loaded Piles: Prediction and Performance

Geotechnical and Geological Engineering, 2018

Research paper thumbnail of Estimation of Burger Model Parameters by Inverse Analysis of Oedometer Data

Contrary to the forward analysis, inverse analysis can be effectively utilized to determine the p... more Contrary to the forward analysis, inverse analysis can be effectively utilized to determine the parameters of a constitutive model commonly used to represent the stress-strain-time behavior or the loaddeformation-time behavior of the soil. This paper reports the development of a generalized inverse analysis formulation for the parameter estimation of four-parameter Burger model. The analysis is carried out by formulating the problem as that of mathematical programming in terms of identification of the design vector, the objective function and the design constraints. Thereafter, the formulated constrained nonlinear multivariable problem is solved with the aid of fmincon: an in-built constrained optimization solver module available in MatLab. In order to gain experience, a synthetic case-study is considered wherein key issues such as the determination and setting up of variable bounds, global optimality of the solution and the minimum number of data-points required for prediction of parameters are addressed. The results reveal that the developed technique is quite efficient in predicting the model parameters. The best result is obtained when the design variables are subjected to a lower bound without any upper bound. Global optimality of the solution is achieved using the developed technique. Based on the experience gained from the synthetic study, the paper reports the determination of Burger model parameters using real-time 1-D field and laboratory oedometer data.

Research paper thumbnail of Modeling of soil–woven geotextile interface behavior from direct shear test results

Geotextiles and Geomembranes, 2010

Research paper thumbnail of Stability of a Mast Foundation: A Case Study

Research paper thumbnail of Prediction of Hydraulic Conductivity of Clay Liners Using Artificial Neural Network

Lowland technology international : the official journal of the International Association of Lowland Technology, 2007

Research paper thumbnail of Predictive Models for Estimating the Coefficient of Permeability for Sands

Research paper thumbnail of Pseudo Static Seismic Stability Analysis of Reinforced Soil Structures

Geotechnical and Geological Engineering, 2010

Research paper thumbnail of Flexural response of beams on viscoelastic foundations with predictions beyond the loading area

International Journal of Geotechnical Engineering, 2018

Research paper thumbnail of Design of geosynthetic-reinforced earth using equivalent thickness concept

The paper presents a design methodology for geosynthetic-reinforced earth using equivalent thickn... more The paper presents a design methodology for geosynthetic-reinforced earth using equivalent thickness concept. The reinforced earth or reinforced granular fill is placed on soft soil. The granular fill and the soft soil have been idealized by the Pasternak shear layer and a layer of Winkler springs, respectively. Stretched rough elastic membranes represent the geosynthetic reinforcement layers. Plane strain conditions are considered for the loading and reinforced foundation soil system. An iterative finite difference scheme is applied for obtaining the solution. Based on the result of the present study, design charts are also presented.

Research paper thumbnail of The Remigration of Romanian Children

Research paper thumbnail of Steady State Response of Beams on a Tensionless Geosynthetic-Reinforced Granular Fill-Soft Soil System Subjected to Moving Loads

SOILS AND FOUNDATIONS, 2005

Research paper thumbnail of Finite Element Simulation of Strip Footings Resting on Double Faced Wrap-Around Reinforced Soil Walls

GeoFlorida 2010, 2010

ABSTRACT

Research paper thumbnail of Liquefaction Characteristics Evaluation Through Different Stress-Based Models : A Comparative Study

The paper presents a comparative study of the predicted response of a liquefiable saturated sand ... more The paper presents a comparative study of the predicted response of a liquefiable saturated sand deposit of Nigata city under different seismic ground motion using three different stress based analytical models due to Finn et al. (1977), Liou et al. (1977), and Katsikas and Wylie (1982). The results are also compared with simplified methods that are adopted in the current design practice. It has been found that the models by Finn et al. (1977) and Katsikas and Wylie (1982) result in close predictions, whereas the predictions by Liou et al. (1977) are significantly different, particularly for predicting the rate of partial liquefaction for the chosen soil deposit and earthquake motions. INTRODUCTION Liquefaction is an earthquake-induced ground failure phenomenon observed in saturated loose sand deposits. Liquefaction involves generation of excess pore pressure, loss of shear strength and excessive volume contraction with associated settlement. Although the simple methods based on SPT...

Research paper thumbnail of Generalized solutions of axially and laterally loaded piles in elasto-plastic soil

International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts, 1974

Research paper thumbnail of The Stability of a Trapdoor

Research paper thumbnail of Direct Search for Critical General Slip Surface of Slopes with Nonlinear Strength Envelope

Geotechnical and Geological Engineering

Research paper thumbnail of A neural network model for slope stability computations

Research paper thumbnail of Reinforcement Effect on the Static Analysis of Circular Footing Resting over Winkler Elastic Foundation

Geotechnical and Geological Engineering

Research paper thumbnail of Parameter estimation of four-parameter viscoelastic Burger model by inverse analysis: case studies of four oil-refineries

Interaction and multiscale mechanics, 2012

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