Influence of Concrete Constitutive Model on Stress and Deformation Calculation Results of Earth-rock Dams
A three-dimensional finite element stress deformation calculation was conducted for a gravel soil core wall rockfill dam of Lianghekou Hydropwer Station on Yalong River,in which the Duncan Zhang(E-v)was adopted for dam material while the linear elastic model and multiple strengthening elastic-plastic model was used for concrete material respectively.The calculation results show that different concrete constitutive models have a significant impact on the deformation calculation results of the dam body.The maximum settlement and maximum horizontal displacement of the dam body calculated using the elastic-plastic model have an increase of 2.87％and 12.11％compared to the corresponding values calculated using the linear elastic model,respectively.Different concrete constitutive models have little effect on the stress calculation results of the dam body,with slight differ-ences in the maximum large and minor principal stress values.The influence of arch effect on the large principal stress is basically consistent.Different concrete constitutive models have little effect on the deformation calcula-tion results of the anti-seepage wall,but have a significant impact on the stress of the anti-seepage wall.The max-imum large principal stress of the anti-seepage wall calculated using the elastic-plastic model has an increase and decrease of 18.69％and 50.88％,respectively,compared to the corresponding values of minor principal stress calculated using linear elasticity.
concreteconstitutive modelrock-fill damfinite elementstress and deformation
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