论文部分内容阅读
结构性土体具有明显的损伤破损效应,结构性土体可看作是重塑土附含有一定的结构性。在荷载作用下,结构性土体的结构性逐渐消失,即土体的结构性发生损伤,直至结构性土体转化为重塑土。基于此认识,可将结构性土体的损伤变量与经典连续介质损伤力学中关于损伤变量的定义一致,同时也是经典损伤力学的扩展。将损伤而耗散的能量定义为损伤耗散能,并引入到土体的能量平衡方程中。通过对结构体元的能量分析,推导了相应的损伤演化方程,并给出了模型参数的确定方法。最后将试验结果和本文方法的结果进行对比,结果表明本文方法能较好反映土体损伤演化规律。
Structural soil with obvious damage damage, structural soil can be seen as a remodeled soil contains a certain structural. Under the action of load, the structural property of structural soil gradually disappears, that is, the structural damage of soil occurs until the structural soil is transformed into remodeled soil. Based on this understanding, the damage variable of structural soil can be consistent with the definition of damage variable in classical continuum damage mechanics, which is also an extension of classical damage mechanics. Damage and dissipative energy is defined as damage dissipation energy and introduced into the soil energy balance equation. Through the energy analysis of structural voxels, the corresponding damage evolution equations are derived, and the method of determining the model parameters is given. Finally, the experimental results and the results of this paper are compared, the results show that this method can better reflect the evolution of soil damage law.