摘要
以往的砂土本构模型不能考虑砂土变形特性对密度和固结压力的双重依赖性。该文基于状态参数、起动的峰值强度、状态剪胀方程和应力比与塑性应变的双曲线假定,提出了一个新的砂土本构模型。该模型的突出优点是对于一种砂土只用一组材料参数就能模拟不同密度和固结压力下的应力变形响应。通过对不同密度和固结压力下的固结排水和不排水试验的模拟初步验证了模型的预测能力。
Most sand constitutive models neglect the dependence of sand deformation behavior on both the density and the confining pressure. A new constitutive model was developed based on the state parameters, the virtual mobilized peak strength, the state dependent dilatancy and a hyperbolic relationship between the stress ratio and the plastic deviatoric strain. The model can represent sand deformations over a wide range of initial densities and confining stresses with only one set of model parameters. Numerical tests for drained and undrained stress pathes illustrate the model capability.
出处
《清华大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2003年第8期1100-1103,共4页
Journal of Tsinghua University(Science and Technology)
基金
国家自然科学基金资助项目(59979012)
北京市自然科学基金重点资助项目(8011002)
