caa a22 4500 467930929 CHVBK 20180406152943.0 cr unu---uuuuu 170328e20060801xx s 000 0 eng 10.1007/s10706-005-4431-5 doi (NATIONALLICENCE)springer-10.1007/s10706-005-4431-5 Deformability characteristics of a rock mass under true-triaxial stress compression [Elektronische Daten] [Rajendra Tiwari, K. Rao] In this paper an experimental study was planned on rock mass model with three joint sets under triaxial and true-triaxial stress states to assess the influence of joint geometry and stress ratios on deformational behaviour of rock mass. The physical models were composed of three continuous orthogonal joint sets in which joint set-I was inclined at angle θ=0°, 20°, 40°, 60°, 80° and 90° with x-axis, joint set-II was produced at staggering s=0.5 and joint set-III was kept always vertical. Thus, rock mass models with medium interlocked smooth joints (ϕ j =36.8°) were simulated under true triaxial compression (σ1>σ2>σ3). Modulus of rock mass shows anisotropy with joint inclination θ which diminishes with increase in σ2/σ3 ratio. The rock mass at θ=60° shows the highest modulus enhancement (599.9%) whereas it is minimum (32.3%) at θ=90°. Further two empirical expressions for estimation of deformation modulus were suggested based on experimental results, which were developed by incorporating two basic concepts, e.g. Janbu's coefficients and joint factor, J f. Springer, 2006 deformability nationallicence intermediate principal stress nationallicence physical modelling nationallicence rock mass nationallicence true triaxial nationallicence Tiwari Rajendra Department of Civil Engineering, Rewa Engineering College, 486002, Rewa, MP, India aut Rao K. Department of Civil Engineering, Indian Institute of Technology, Haus Khas, 110016, New Delhi, India aut Geotechnical & Geological Engineering Kluwer Academic Publishers 24/4(2006-08-01), 1039-1063 0960-3182 24:4<1039 2006 24 10706 https://doi.org/10.1007/s10706-005-4431-5 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10706-005-4431-5 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Tiwari Rajendra Department of Civil Engineering, Rewa Engineering College, 486002, Rewa, MP, India aut NATIONALLICENCE 700 1- Rao K. Department of Civil Engineering, Indian Institute of Technology, Haus Khas, 110016, New Delhi, India aut NATIONALLICENCE 773 0- Geotechnical & Geological Engineering Kluwer Academic Publishers 24/4(2006-08-01), 1039-1063 0960-3182 24:4<1039 2006 24 10706 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer