A GENERALIZED CUBIC LAW FOR ROCK JOINTS CONSIDERING POST-PEAK MECHANICAL EFFECTS

摘要：

A joint deformation model and a generalized cubic law are proposed to model the mechanical and hydraulic behaviours of rock joints subjected to normal and shear loading. The deformation model is established in the framework of non-associative elastic-plasticity, with special emphasis on modelling the coupling effect of post-peak dilatancy and shear softening. The generalized cubic law is proposed on the basis of the deformation model by taking into account evolution of joint contact area ratio and by virtue of the equivalence principle of flow dissipation energy. Experimental validations show that the proposed model has better capability to predict the hydraulic property of real hard joints, especially in modelling the irreducible flow behaviour of the joints under significant normal closure and in modelling the post-peak flow behaviour with remarkable shear dilatancy.

作者: Chuangbing Zhou Yifeng Chen Yongqing Sheng

作者单位: State Key Laboratory of Water Resources and Hydropower Engineering Science, Institute of Rock Mechanics and Engineering, Wuhan University, 430072 Wuhan, P.R.China

会议类型: 国际会议

会议名称: 第二届国际应力-水流-热-化学耦合学术大会(2nd International Conference on Coupled Thermo-Hydro-Mechanical Processes in Geosystems and Engineering：Geoproc2006)

会议地点: 南京

会议语种:英文

页码: 477-487

在线出版日期: 2006-05-22（万方平台首次上网日期，不代表论文的发表时间）