Numerical Analysis of Cyclic Loading effect on Progressive Failure in Earth Damsupona Multiline-Multilaminate Model

Abstract

Dam construction is one of the major development planning policies. The observation of the criteria and standards codified in every country for the achievement of a safe plan is also a major principle. A progressive failure is highly likely if fracture occurs in each section of an earth dam due to dynamic loads. Since such an inspection needs precise modeling and defining of the proper boundary conditions in high accuracy, multiline models have been taken into account herein through taking advantage of multiline pattern. Pattern parameters have been applied in the present study for confining pressures by comparing behavioral pattern with the results of standard triaxial experiment for three different confining pressure rates. Next, for dynamic (cyclic) state, the results obtained from the behavioral pattern will be compared with the results of the standard triaxial laboratory results. To observe the accuracy of the behavioral pattern's performance for cyclic loading mode, use was made of the results of a cyclic triaxial experiment conducted by Anlong Lia et al. for confining 2MPa, 10MPa, 20MPa, 30MPa, 40MPa and 50MPa pressures. After adding the new model to OpenSees numerical analysis, it is necessary to reensure the accuracy of the multilinear behavioral model's performance within the format of the multilaminate theory. Thus, to do so, a standard cyclic triaxial experiment was conducted with the same dimensions and the same boundary conditions and with strain in a confining pressure of 10KPa for the dynamic loading state following which the stress-strain and volumetric strainaxial strain curves were drawn for them and the behaviors were obtained for the new model in the finite element space and the laboratory results were eventually compared.

Numerical analysis of cyclic loading effect on progressive failure of an earth dam upon a multi-laminate framework

“…On each plane the important effects of the applied anisotropy analyzed to evaluate the progressive failure. Evaluating Crack propagation in Earth Dams upon a mixture of Multi-Line technic and Multi-Laminate theory clarified the order of planes activation and progressive failure due to cyclic triaxial test with the same dimensions and boundary conditions and confining pressure for dynamic loading state investigated and compared to laboratory tests (Rahimi Dadgar et al, 2019aDadgar et al, , 2019b) and finally the model constants modified based on constitutive relations obtained from elasto-plastic theory (Dashti et al, 2017(Dashti et al, , 2019.…”