华侨大学学报（自然科学版）2009，Vol.30Issue(6)：694-697,4.
岩体节理非线性法向循环加载本构模型的改进
Improvement of Nonlinear Constitutive Model for Rock Fractures under Normal Cyclic Loading
摘要
Abstract
It is supposed that the initial normal stiffness of unloading and reloading curves is calculated from those of the previous loading and unloading curves,and then the cyclic loading constitutive equation for rock fracture is established.With different values of the parameters,this model generalizes the existing different models.By moving inward the asymptote of unloading curves,the characteristic of hysteresis is reflected.Describing the extent of nonlinearity quantitatively,the improved nonlinear elastic constitutive model for normal deformation of rock fractures is extended to cyclic loading process,which changes the way that the assumption is made by the kind of the stress-deformation curves in previous models made.Considering the geometric characters,infill mineralogy of the rock fractures and the rock types,the predication results fitted the test results well in adopting the new model for the predication of others test data,which verifies the feasibility of the new model.关键词
岩体节理/循环加卸载/非线性法向变形/本构模型Key words
rock fractures/cyclic loading/nonlinear normal deformation/constitutive model分类
建筑与水利引用本文复制引用
俞缙,林从谋,赵晓豹..岩体节理非线性法向循环加载本构模型的改进[J].华侨大学学报（自然科学版）,2009,30(6):694-697,4.基金项目
国家自然科学基金资助项目(40702046) （40702046）
福建省自然科学基金资助项目(2006J0445) （2006J0445）
建设部科学技术项目计划(06-K1-23) （06-K1-23）
华侨大学高层次人才科研启动项目(08BS414) （08BS414）
