A coupled elasto-plastic-damage mechanical model for marble  

作　　者：ZHOU Hui 1,ZHANG Kai 2 & FENG XiaTing 1 1 State Key Laboratory of Geomechanics and Geotechnical Engineering,Institute of Rock and Soil Mechanics,Chinese Academy of Sciences,Wuhan 430071,China 2 State Key Laboratory for Geomechanics and Deep Underground Engineering,China University of Mining&Technology,Xuzhou 221008,China 

出　　处：《Science China(Technological Sciences)》2011年第S1期228-234,共7页中国科学（技术科学英文版）

基　　金：supported by the National Basic Research Program of China("973"Program)(Grant No.2010CB732006);the National Natural Science Foundation of China(Grant Nos.50579091 and 50979104);the Important Pilot Project(for youth talent)of Knowledge Innovation Project of CAS(Grant No.KZCX2-EW-QN115)

摘　　要：A profound understanding of the mechanical behaviors of marble is very important for the design and construction of deep diversion tunnels in Jinping II hydropower station.In this paper,a coupled elasto-plastic-damage mechanical model is presented for Jinping marble.Firstly,the experimental investigations on Jinping marble are summarized.Then,based on the framework of continuum damage and plastic theories,a general mechanical model is proposed to predict the mechanical responses of Jinping marble.The proposed model is used to simulate the triaxial compressive tests,and there is a general good agreement between experimental data and numerical predictions in a qualitative manner.The proposed model is able to capture the main features of Jinping marble observed in experiments,such as progressive yielding process,damage induced by plastic distortion,dilation,elastic degradation and stress sensitivity.A profound understanding of the mechanical behaviors of marble is very important for the design and construction of deep diversion tunnels in Jinping II hydropower station.In this paper,a coupled elasto-plastic-damage mechanical model is presented for Jinping marble.Firstly,the experimental investigations on Jinping marble are summarized.Then,based on the framework of continuum damage and plastic theories,a general mechanical model is proposed to predict the mechanical responses of Jinping marble.The proposed model is used to simulate the triaxial compressive tests,and there is a general good agreement between experimental data and numerical predictions in a qualitative manner.The proposed model is able to capture the main features of Jinping marble observed in experiments,such as progressive yielding process,damage induced by plastic distortion,dilation,elastic degradation and stress sensitivity.

关 键 词：MECHANICAL model DAMAGE ELASTO-PLASTIC COUPLING MARBLE 

分 类 号：TV223.1[水利工程—水工结构工程]