The behavior of laterally loaded pile groups is usually accessed by beam-on-nonlinear-Winkler-foundation (BNWF) approach employing various forms of empirically derived p-y curves and p-multipliers. Averaged p-multiplier for a particular pile group is termed as the group effect parameter. In practice, the p-y curve presented by the American Petroleum Institute (API) is most often utilized for piles in granular soils, although its shortcomings are recognized. In this study, we performed 3D finite element analysis to develop p-multipliers and group effect parameters for 3 × 3 to 5 × 5 vertically squared pile groups. The effect of the ratio of spacing to pile diameter (S/D), number of group piles, varying friction angle (φ), and pile fixity conditions on p-multipliers and group effect parameters are evaluated and quantified. Based on the simulation outcomes, a new functional form to calculate p-multipliers is proposed for pile groups. Extensive comparisons with the experimental measurements reveal that the calculated p-multipliers and group effect parameters are within the recorded range. Comparisons with two design guidelines which do not account for the pile fixity condition demonstrate that they overestimate the p-multipliers for fixed-head condition.
A series of 3D finite element (FE) analyses were performed to estimate the peak penetration resistance of spudcan foundations in sand over clay soil profiles. Elasto-perfectly plastic models following Mohr–Coulomb and Tresca failure criteria were used for sand and clay layers, respectively. The coupled Eulerian–Lagrangian (CEL) approach was used to simulate the large deformation in soil that occurs during the spudcan penetration. The performance of the numerical model was validated against centrifuge test results. A parametric study with a broad range of strength parameters for sand and clay was performed. The numerical results were used to assess the influence of sand thickness (Hs), the diameter of spudcan (D), friction angle of sand, and undrained shear strength of clay (su). A wide range of su was utilized to predict the resistance both of the soft and stiff clays. The calculated peak resistances are compared with a published analytical model. It is demonstrated that the model highly overestimates the peak resistance for stiff clays, most likely because it was developed specifically for soft clays and, therefore, does not account for the influence of su. One of the parameters of the model is revised to account both for su. Comparisons highlight that the modified model is able to capture the simulated peak penetration resistance for both soft and stiff clays.
Purpose The study was conducted with the primary objective of measuring the association between the disputant’s expenses and Dispute Resolution Council (DRC) effectiveness in the study area. Design/methodology/approach The current study followed a quantitative research design. To obtain the study objectives, data was collected from a sample of 387 respondents in the selected three Tehsils of District Mardan, Pakistan. The respondents were selected through multistage stratified random sampling. At bivariate and multivariate level analyses, chi-square test and Gamma (γ) test statistics were used to test the relationship between variables (expenses of the disputants and effectiveness of DRC). Gender, monthly income and literacy status were used as control variables at the multivariate level. Findings At the bivariate level analysis, the study found a significant association (P = 0.05) of office of DRC is easily accessible, DRC as a cost-effective justice system as compared to other, availability of a vehicle to reach the DRC office and affordable amount for preparation of documents and filing the case with the effectiveness of DRC. At the multivariate level, the study portrayed that the expenses of the disputants enhance the effectiveness of DRC in males to a greater extent than females. However, the costs of the disputants were a universal feature to explain the efficacy of DRC irrespective of monthly income and literacy status. Research limitations/implications The present study was limited to cost and expenditure of the disputants which was associated with effectiveness of DRC with collaboration of gender, monthly income and literacy status. Moreover, a representation of “387” was only selected but it was enough for validity and reliability of the research dynamics. Practical implications The current study is highly significant for the policymakers for devising alternate policies for disputes resolution as the study focused on the cost and expenditure and recommend suggestions that how to improve the effectiveness of DRC in easy and timely disposal of disputes. Social implications The main objectives of the study is to examine the association between cost and expenditure of the disputant and effectiveness of DRC. In addition, to measure the influence of gender, income and literacy status on the association between the association between cost and expenditure of the disputant and effectiveness of DRC. Originality/value The current study is highly significant for policymakers to devise alternate policies for dispute resolution. The study focused on the cost and expenditure and recommended suggestions for improving the effectiveness of DRC in easy and timely disposal of disputes.
The present study aims to analyze the respondent’s perception regarding dispute resolution council’s effectiveness in rural areas of district Mardan-Khyber Pakhtunkhwa (KP)-Pakistan. The main objective of the research is to measure the association between awareness regarding DRC and legal rights and DRC effectiveness in the study area. Awareness regarding DRC and legal rights helps illiterate persons to a greater extent than the literate ones . The study suggests policy interventions for government to take part in the creation of awareness among general masses regarding the positive features of DRC. Up-gradation of DRC as an institute with professional, cultural knowledge and skills is required with an integrated drive for effectiveness of DRC through coordination with different stakeholders like community, police, district/tehsil administration, DRC members and locally elected representative etc.
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