International Journal of Optimization in Civil Engineering دانشگاه علم و صنعت ایران Iran University of Science & Technology http://ijoce.iust.ac.ir 18 agent2 2228-7558 en jalali 1395 12 1 gregorian 2017 3 1 7 2 online 1 fulltext
en ACTIVE EARTH PRESSURE IN COHESIVE-FRICTIONAL SOILS USING FEM AND OPTIMIZATION Optimal design Optimal design پژوهشي Research <p>Calculation of lateral earth pressure on retaining walls is one of the main issues in geotechnics. The upper and lower bound theorems of plasticity are used to analyze the stability of geotechnical structures include bearing capacity of foundations, lateral earth pressure on retaining walls and factor of safety of slopes. In this paper formulation of finite element limit analysis is introduced to determine plastic limit load in the perfect plastic materials. Elements with linear strain rates, which are used in the formulation, cause to eliminate the necessity of velocity discontinuities between the elements. Using non-linear programming based on second order cone programming (SOCP), which has good conformity with cone yield functions such as Mohr-Coulomb and Drucker-Prager, is another important advantage that remove the problem of using ordinary linear programming algorithms for yield functions such as divergent in the apexes. Finally, the optimization problem will be solved by mathematical method. The proposed method is used for calculating active earth pressure on retaining walls in cohesive-frictional soils. According to results of analysis, active earth force on retaining wall is decreased by increasing soil cohesion, wall inclination friction angle between backfill and wall and friction angle of soil wherein the force is increased by increasing surcharge on the backfill and the backfill slope. Mathematical method is used for obtaining accurate results in this research, however, heuristic methods are used when approximate solutions are sufficient.</p> upper bound, finite element method (F.E.M), optimization, non-linear programming, active earth pressure , cohesive-frictional soils. 257 267 http://ijoce.iust.ac.ir/browse.php?a_code=A-10-66-139&slc_lang=en&sid=1 P. Hamidi `180031947532846001108` 180031947532846001108 Yes T. Akhlaghi `180031947532846001109` 180031947532846001109 No M. Hajialilou Bonab `180031947532846001110` 180031947532846001110 No