Simulation Analysis of Concrete Dam’s Joints Based on Elastic-Plastic Creep Model

Abstract:

When the stress of concrete dam joints during the whole construction process is simulated with the elastic creep model, the simulated result will be larger than the real value if the elastic modulus of the joints take the minimum value and the plastic yield and cracking of joints are not considered; while problems like iterative convergence will appear if the contact element or thin-layer element is applied to the analysis. In consideration of the above factors, an elastic-plastic model, obtained by connecting one or two Bingham elements in series in the conventional model, was carried out for the stress simulation analysis of concrete joints based on the visco-elastic-plastic theory. From the discussion of the feasibility of setting up longitudinal joints in the bottom hole dam section, it is concluded that the concrete joints can be simulated by elastic-plastic creep model presented in this paper, for this method can fairly reflect the deformation stress condition of the concrete joints; in addition, it neither increases the complexity of program development, nor is related to iterative convergence.

• Periodical: Applied Mechanics and Materials (Volume 137)
• Pages: 243-249
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.137.243
• Online since: October 2011
• Authors: Yao Ying Huang, Hong Zheng, Yi Hong Zhou
• Keywords: Concrete Dam, Elastic-Plastic Creep Model, Joint, Simulate

References

[1] Zhu B.F. Thermal Stresses and Temperature Control of Mass Concrete. Beijing:China Electric Power Press, 2000(in Chinese)

[2] Goodman, R.E., and Taylor, R.L.,and Brekke, T.L. A model for the mechanics of joint rock[J] ASCE, 1968,94(SM3)

[3] Fu, Z.X., and Zhang, L.J. Stress analysis of massive concrete structure considering construction joints with key grooves. China Civil Engineering Journal ,1994 27(4):63-69(in Chinese)

[4] Hou, C.S., and Zhao, D.S., and Li, M.S. Three-dimension Emulation Computation Study of Transverse Joint Aperture of Concrete Arch Dam. Water Resources and Hydropower Engineering , 2000 31(8):41-43(in Chinese)

[5] Li, J.X., and Wang, G.L. and Jin, F. Study on the effect of the binding quality of transverse joints on the structure of arch dam. Water Power, 2001 (10):45-48

[6] Zhu, B.F. Joint element with keys and influence of joint on stresses in concrete dams. Chinese Journal of Hydraulic Engineering 2001 (2):1-5

[7] Xie, L.F., and Chang. X.L., and Zhou,W. Transverse joints a perture simulation study of high arch dam with spherical key grooves. Engineering Journal of Wuhan University , 2005 38(6): 72-75(in Chinese)

[8] Zhou, W., and Chang, X.L., and Xie, L.F. Concrete-joint multiple element to simulate transverse joint of high arch dam during construction. Chinese Journal of Rock Mechanics and Engineering, 2006 25(supp2) 3809-3815(in Chinese)

[9] He, J.R. Study on temperature control and crack prevention of high RCC gravity dams. Master Dissertation. Nanjing: Hohai University, 2003(in Chinese)

[10] Zhuo, J.S., and Jiang, H.D. The elastic-plastic analysis of rock foundation with thin-layer. Journal of East China Thchnical Univ of Water Resources, 1979 7(2):1-22 (in Chinese)

[11] Owen, D.R.J., and Hinton, E. Finite elements in plasticity：theory and practice. Swansea (U.K. Pineridge Press Ltd. (1980)

[12] Zhu, B.F. The Finite Element Method Theory and Applications. Beijing:China WaterPower Press, 2009 (in Chinese)

[13] Chen, C.H., and Zhu, B.F. Analysis of Slide Stability of Concrete Dams by means of the Elasto-Visco-Plastic FEM. Chinese Journal of Hydraulic Engineering 1984 (7):22-31)

[14] Chen, S.H. Computational Rock Mechanics and Engineering. Beijing：China WaterPower Press, 2006 (in Chinese)

[15] Huang, Y.Y. Forward and Back Analysis Methods of Time-dependent Effect in High Dam and Rock Foundation and its Application Ph. D. Dissertation. Nanjing：Hohai University, 2007 (in Chinese)

[16] Simo, J.C., and Hughes, T.J.R. Computational Inelasticity. Springer, (1998)