岩土力学2013，Vol.34Issue(1)：1-5,5.
筑坝土石料的变参数Ramberg-Osgood模型及其适应性研究
Ramberg-Osgood model with variable parameters of earth-rock materials for earth-rock dam and its adaptability
摘要
Abstract
It is inconvenient for research the deformation mechanism of materials for earth-rock dam under dynamic loading using equivalent linear viscoelastic model, though it has been applied widely, because the stress-strain expressions haven't been derived in this model and the energy dissipation don't be described. In this paper, the Ramberg-Osgood constitutive model with variable parameters has been researched; and its adaptability has been discussed. It is found that the Ramberg-Osgood constitutive model is not applicable for describing the dynamic property of soil in small strain level. Also the expression of variable parameters is derived; the hysteretic loops have been drawn in different dynamic shear levels. A solid foundation has been established for studying the dynamic dissipation and strain mechanism of earth-rock dam materials.关键词
土石坝料/变参数Ramberg-Osgood模型/滞回圈Key words
earth-rock dam materials/ Ramberg-Osgood constitutive model with variable parameters/ hysteretic loop分类
数理科学引用本文复制引用
迟世春,陈崇茂,贾宇峰..筑坝土石料的变参数Ramberg-Osgood模型及其适应性研究[J].岩土力学,2013,34(1):1-5,5.基金项目
国家自然科学基金(No.51179024,No.50979014) （No.51179024,No.50979014）
高等学校博士学科点专项科研基金资助项目(No.20090041110016). （No.20090041110016）
