Soil System

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G. L. Sivakumar Babu - One of the best experts on this subject based on the ideXlab platform.

  • Deflection and buckling of buried flexible pipe-Soil System in a spatially variable Soil profile
    Geomechanics and Engineering, 2011
    Co-Authors: Amit Srivastava, G. L. Sivakumar Babu
    Abstract:

    Response of buried flexible pipe-Soil System is studied, through numerical analysis, with respect to deflection and buckling in a spatially varying Soil media. In numerical modeling procedure, Soil parameters are modeled as two-dimensional non-Gaussian homogeneous random field using Cholesky decomposition technique. Numerical analysis is performed using random field theory combined with finite difference numerical code FLAC 5.0 (2D). Monte Carlo simulations are performed to obtain the statistics, i.e., mean and variance of deflection and circumferential (buckling) stresses of buried flexible pipe-Soil System in a spatially varying Soil media. Results are compared and discussed in the light of available analytical solutions as well as conventional numerical procedures in which Soil parameters are considered as uniformly constant. The statistical information obtained from Monte Carlo simulations is further utilized for the reliability analysis of buried flexible pipe-Soil System with respect to deflection and buckling. The results of the reliability analysis clearly demonstrate the influence of extent of variation and spatial correlation structure of Soil parameters on the performance assessment of buried flexible pipe-Soil Systems, which is not well captured in conventional procedures.

  • Reliability Analysis of Buried Flexible Pipe-Soil Systems
    Journal of Pipeline Systems Engineering and Practice, 2010
    Co-Authors: G. L. Sivakumar Babu, Amit Srivastava
    Abstract:

    Reliability analysis of the buried flexible pipe-Soil System is performed from three different failure criteria: (1) deflection; (2) buckling; and (3) wall thrust. The response surface methodology is used to establish approximate functional relationships between input variables and output responses and reliability analysis is performed using first-order reliability method approach. The available analytical solutions as well as the results of the numerical analysis are used in the reliability analysis and results are discussed. A comparison of results of the reliability analysis of the buried pipe-Soil System in the light of available deterministic solutions indicated that the probabilistic approach, which considers variability in the input parameters provides a means of understanding of the performance of the buried pipe-Soil System.

Amit Srivastava - One of the best experts on this subject based on the ideXlab platform.

  • Deflection and buckling of buried flexible pipe-Soil System in a spatially variable Soil profile
    Geomechanics and Engineering, 2011
    Co-Authors: Amit Srivastava, G. L. Sivakumar Babu
    Abstract:

    Response of buried flexible pipe-Soil System is studied, through numerical analysis, with respect to deflection and buckling in a spatially varying Soil media. In numerical modeling procedure, Soil parameters are modeled as two-dimensional non-Gaussian homogeneous random field using Cholesky decomposition technique. Numerical analysis is performed using random field theory combined with finite difference numerical code FLAC 5.0 (2D). Monte Carlo simulations are performed to obtain the statistics, i.e., mean and variance of deflection and circumferential (buckling) stresses of buried flexible pipe-Soil System in a spatially varying Soil media. Results are compared and discussed in the light of available analytical solutions as well as conventional numerical procedures in which Soil parameters are considered as uniformly constant. The statistical information obtained from Monte Carlo simulations is further utilized for the reliability analysis of buried flexible pipe-Soil System with respect to deflection and buckling. The results of the reliability analysis clearly demonstrate the influence of extent of variation and spatial correlation structure of Soil parameters on the performance assessment of buried flexible pipe-Soil Systems, which is not well captured in conventional procedures.

  • Reliability Analysis of Buried Flexible Pipe-Soil Systems
    Journal of Pipeline Systems Engineering and Practice, 2010
    Co-Authors: G. L. Sivakumar Babu, Amit Srivastava
    Abstract:

    Reliability analysis of the buried flexible pipe-Soil System is performed from three different failure criteria: (1) deflection; (2) buckling; and (3) wall thrust. The response surface methodology is used to establish approximate functional relationships between input variables and output responses and reliability analysis is performed using first-order reliability method approach. The available analytical solutions as well as the results of the numerical analysis are used in the reliability analysis and results are discussed. A comparison of results of the reliability analysis of the buried pipe-Soil System in the light of available deterministic solutions indicated that the probabilistic approach, which considers variability in the input parameters provides a means of understanding of the performance of the buried pipe-Soil System.

Saikat Chowdhury - One of the best experts on this subject based on the ideXlab platform.

P.n. Godbole - One of the best experts on this subject based on the ideXlab platform.

  • Interactive analysis of a space frame-raft-Soil System considering Soil nonlinearity
    Computers & Structures, 1994
    Co-Authors: M.n. Viladkar, J. Noorzaei, P.n. Godbole
    Abstract:

    Abstract A new approach for the physical and material modelling of a space frame-raft-Soil System is presented. The physical modelling consists of a modified Timoshenko beam bending element with six degrees of freedom per node to model the beams and columns of the superstructure, a modified Mindlin's plate bending element with five degrees of freedom per node to represent the structural slabs and raft, and the coupled finite-infinite elements with three degrees of freedom per node to model the Soil media. The constitutive modelling involves the use of the hyperbolic model to account for the Soil nonlinearity. The applicability of the proposed physical model is demonstrated by analysing a four-storey, five- by three-bay space frame. An attempt is also made to compare the linear and nonlinear interactive behaviour of the space frame-raft-Soil System.

  • Soil-structure interaction of space frame-raft-Soil System—a parametric study
    Computers & Structures, 1991
    Co-Authors: J. Noorzaei, M.n. Viladkar, P.n. Godbole
    Abstract:

    Abstract This study deals with physical modelling of space frame-raft and Soil System by using isoparametric beam bending element to represent beams and columns of the frame, plate bending element for representing raft as well as slabs of the structure. The Soil mass has been idealized by coupled finite-infinite brick elements. Furthermore, a detailed parametric study of the effect of variation in raft and slab thicknesses on the interactive behaviour of space frame-raft-Soil System has been carried out.

Nanthi Bolan - One of the best experts on this subject based on the ideXlab platform.

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