基于阻尼的边界面模型  

Damping ratio-based bounding surface model

作　　者：刘方成[1] 尚守平[2] 王海东[2] 蒋隆敏[1] 

机构地区：[1]湖南工业大学土木建筑学院,湖南株洲412008 [2]湖南大学土木工程学院,湖南长沙410082

出　　处：《岩土工程学报》2009年第6期851-858,共8页Chinese Journal of Geotechnical Engineering

基　　金：国家自然科学基金项目(50808078);教育部博士点基金新教师基金项目(20070532090);湖南省自然科学基金项目(08JJ4016)

摘　　要：阻尼比反映了土消耗能量的能力,土的动力本构模型真实地体现土的阻尼比具有必要性与重要性。在基于阻尼的滞回模型的基础上,通过在应力偏平面上引入相应的硬化准则,将其推广至弹塑性领域,建立了基于阻尼的边界面模型。给出了详细的推导过程,以及对相应的硬化准则的说明。理论预测结果与循环单剪试验结果的比较,说明了模型的可靠性。与基于曼辛准则的模型的比较,说明了其先进性,能够真实地反映阻尼比对土动力反应的影响。Damping ratio indicates the energy dissipation capability of soil material, and it should be of great essentiality and importance to be embodied in the constitutive model of soil. By leading into the corresponding hardening criterion of the partial stress plane, the damping ratio-based hysteretic model is extended to the elasto-plastic field, and a new damping ratio-based bounding surface model is constituted. Detailed process of deriving and instruction for the corresponding hardening criterion is given. Comparison beween the model＇s theoretical forecast and the cyclic simple shear test results proves the reliability of the model, and comparison between the model＇s theoretical forecast and the Masing＇s rule-based models indicates the advantage of the novel model, which can reflect the impact of damping ratio of soil on its dynamic response truly.

关 键 词：阻尼比 边界面模型 硬化准则 循环单剪试验 

分 类 号：TU411[建筑科学—岩土工程]