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http://dx.doi.org/10.9711/KTAJ.2020.22.4.419

Evaluation of Mazars damage model of KURT granite under simulated coupled environment of geological disposal  

Kim, Jin-Seop (Radioactive Waste Disposal Division, KAERI)
Hong, Chang-Ho (Radioactive Waste Disposal Division, KAERI)
Kim, Geon-Young (Radioactive Waste Disposal Division, KAERI)
Publication Information
Journal of Korean Tunnelling and Underground Space Association / v.22, no.4, 2020 , pp. 419-434 More about this Journal
Abstract
In this study, the damage parameters of Mazars model for KURT (KAERI Underground Research Tunnel) granite are measured form uniaxial compressive and Brazilian tests under the simulated coupled condition of a deep geological disposal. The tests are conducted in three different temperatures (15℃, 45℃, and 75℃) and dry/saturated conditions. Major model parameters such as maximum effective tensile strain (𝜖d0), At, Bt, Ac, and Bc differ from the typical reference values of concrete specimens. This is likely due to the difference in elastic modulus between rock and concrete. It is found that the saturation of specimens causes an increase in value of Bt and Bc while, the rise in temperature increases 𝜖d0 and Bt and decreases Bc. The damage model obtained from this study will be used as the primary input parameters in the development of coupled Thermo-Hydro-Mechanical Damage numerical model in KAERI.
Keywords
Mazars damage model; Granite; Coupled geological disposal condition; KURT; High-level radioactive waste;
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Times Cited By KSCI : 5  (Citation Analysis)
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1 Lee, J., Kim, I.Y., Bae, D.S., Lee, M., Lee, Y.M, and Choi, H.J. (2016), A safety case of the conceptual disposal system for pyro-processing high level waste based on the KURT site (AKRS-16): I. Design base & disposal facility, Korea Atomic Energy Research Institute Report, KAERI/TR-6727/2016.
2 Mazars, J. (1986), "A description of micro- and macroscale damage of concrete structures", Engineering Fracture Mechanics, Vol. 25, No. 5-6, pp. 729-737.   DOI
3 Mazars, J., Grange, S. (2017), "Simplified strategies based on damage mechanics for concrete under dynamic loading, Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, Vol. 375, No. 2085, pp. 20160170.   DOI
4 Mazars, J., Hamon, F., Grange, S. (2015), "A new 3D damage model for concrete under monotonic, cyclic and dynamic loadings", Materials and Structures, Vol. 48, pp. 3779-3793.   DOI
5 McKinnon, M.A., Cunningham, M.E. (2003), Dry storage demonstration for high-burnup spent nuclear fuel-feasibility study, Pacific Northwest National Laboratory Report, PNNL-14390.
6 McKinnon, M.A., DeLoach, V.A. (1993), Spent nuclear fuel storage - Performance tests and demonstrations, Pacific Northwest Laboratory Report, PNL-8451.
7 Park, S.H., Kim, J.S., Kim, G.Y., Kwon, S. (2019), "Evaluation of mechanical properties of KURT granite under simulated coupled condition of a geological repository", Journal of Korean Tunnelling and Underground Space Association, Vol. 21, No. 4, pp. 501-518.   DOI
8 Pituba, J.J.C., Lacerda, M.M.S. (2012), "Simplified damage models applied in the numerical analysis of reinforced concrete structures", IBRACON Structures and Materials Journal, Vol. 5, No. 1, pp. 26-37.
9 Saouridis, C. (1988), Objective identification and numerical simulation of softening: multiple scale approach to the damage process of concrete, Ph.D. Thesis, Paris-6 University, LMT Cachan (in French).
10 Souissi, S., Miled, K, Hamdi, E., Sellami, H. (2017), "Numerical modeling of rock damage during indentation process with reference to hard rock drilling", International Journal of Geomechanics, Vol. 17, No. 7, pp. 04017002.   DOI
11 Xu, S., White, R.E. (1995), "A new velocity model for clay-sand mixtures", Geophysical Prospecting, Vol. 43, No. 1, pp. 91-118.   DOI
12 Idiart, A., Lavina, M., Coene, E. (2019), Modelling of concrete degradation-Hydro-chemo-mechanical processes, SKB Report R-19-12, pp. 41.
13 De Falco, A., Mori, M., Sevieri, G. (2018), "Mazars' damage model for masonry structures: a case study of a church in Italy", Proceedings of the COMSOL Conference 2018, Lausanne, pp. 1-7.
14 Gassmann, F. (1951), "Elastic waves through a packing of spheres", Geophysics, Vol. 16, No. 4, pp. 673-682.   DOI
15 Gerard, B., Piajaudier-Cabot, G., Laborderie, C. (1998), "Coupled diffusion-damage modelling and the implications on failure due to strain localization", International Journal of Solids and Structures, Vol. 35, No. 31-32, pp. 4107-4120.   DOI
16 Hamon, F. (2013), Model of damage of Mazars, Code_Aster, R7.01.08., pp. 1-16.
17 IAEA (2003), The long term storage of radioactive waste: Safety and sustainability, A Position Paper of International Experts, IAEA-LTS/RW, IAEA, Vienna.
18 Jianhong, Y., Wu, F.Q., Sun, J.Z. (2009), "Estimation of the tensile elastic modulus using Brazilian disc by applying diametrically opposed concentrated loads", International Journal of Rock Mechanics and Mining Sciences, Vol. 46, No. 3, pp. 568-576.   DOI
19 Jirasek, M. (2011), "Damage and smeared crack models", Numerical Modeling of Concrete Cracking, Springer, pp. 1-49.
20 Kachanov, L.M. (1958), "Time of rupture process under creep conditions", Izvestiya Akademii Nauk SSSR Otdelenie Tekniches, No. 8, pp. 26-31.
21 Kim, J.S. Cho, W.J., Park, S., Kim, G.Y., Baik, M.H. (2019a), "A review on the design requirement of temperature in high-level nuclear waste disposal system: based on bentonite buffer", Journal of Korean Tunnelling and Underground Space Association, Vol. 21, No. 5, pp. 587-609.   DOI
22 Kim, J.S., Kwon, S.K., Sanchez, M., Cho, G.C. (2011), "Geological storage of high level nuclear waste", KSCE Journal of Civil Engineering, Vol. 15, No. 4, pp. 721-737.   DOI
23 Kim, J.S., Cho, W.J., Kim, G.Y. (2019b), "Hydrothermal analysis of a double-layered bentonite in two-layered repository using TOUGH2 code: High performance buffer", Proceedings of the KRS 2019 Fall Conference, Vol. 17, No. 2, Jeju, pp. 265-266.
24 Kim, J.S., Cho, W.J., Lee, K.S., Choi, H.J., Cho, G.C. (2012), "Numerical simulation for variations of water saturation in bentonite buffer under the effect of a rock joint using the TOUGHT2 code", Journal of Korean Tunnelling and Underground Space Association, Vol. 14, No. 6, pp. 575-593.   DOI