2 results for Alim, M.A.

  • Stress-Strain Behaviour and Model Prediction of Reinforced Residul Soil

    Mofiz, S.A.; Rahman, M.M.; Alim, M.A. (2004)

    Conference Contributions - Published
    University of Canterbury Library

    A study of the shear strength and deformation characteristics of unreinforced residual soil is presented. Direct shear testing was conducted using a computerized shear box apparatus with stress levels ranging between 0.05 to 0.40 MPa. Effects of nonwoven geotextile reinforcement, orientation of reinforcements and volume changes on the shear strength of soil composites were analyzed. For reinforced soil composites, it was observed that the shear and volume change behaviour is related to the degree of reinforcement orientation. It was also showed that the contraction or dilation properties of the unreinforced and reinforced soil composites are highly dependent on the stress levels. An elasto-plastic model with plastic hardening (load transfer model) was extended to incorporate cohesive soils. The model parameters were then used to predict the stress strain behaviour of unreinforced and reinforced soil. The results presented satisfactory agreement with experimental observations at higher stress levels.

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  • Investigation of lateral load resistance of laterally loaded pile in sandy soil

    Rahman, M.M.; Alim, M.A.; Chowdhury, M.A.S. (2003)

    Conference Contributions - Published
    University of Canterbury Library

    Investigation of the lateral load resistance of pile is made by laboratory model test on single and group piles. The experiments are carried out with varying size, spacing of piles in group and length to diameter ratio (L/d) of the piles. Lateral resistance of pile is a function of shape, size, spacing and length to diameter ratio (L/d) of the pile. In this study, model pile is single pile, and group piles having configurations are of (2x1, 2x2) which satisfy the Meyerhof’s relative stiffness limit of pile for flexible pile. For model pile embedded length to diameter ratio (L/d) are 20, 30, 35 and spacing are S = 3d, 4.5d, 6d. These experiments are conducted in the sand available at North-South region (Rajshahi) in Bangladesh. Lateral loads are applied in the single and pile groups by a lateral load setup arrangement. Due to the lateral load the pile are deflected. The load-displacement responses, ultimate resistance, group efficiency of piles with different spacing and number of piles in group have been qualitatively and quantitatively investigated in the experiment. From the load-displacement curve, ultimate lateral load resistances are obtained by double tangent method. Also some analytical methods proposed by Meyerhof, Patra & Pise used to determine the ultimate lateral load resistance of pile and pile groups. Finally, the lateral resistance of pile obtains by experiment and the ultimate lateral load resistances obtained by analytical methods are compared and trying to find out a analytical methods to determine the lateral reasonably for the sand are available at North-South (region) Rajshahi In Bangladesh.

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