Conclusions
Evidence has been presented for the necessity to consider the crack rate dependence as an important source of time dependence next to bulk creep in a porous, cementitious material. Only by including this contribution to the cracking resistance, the observed times to failure and the crack mouth opening displacements in three-point bending creep tests of concrete beams can be computed with reasonable accuracy.
Two formulations have been presented for the modelling of the crack rate dependence. A simple, single parameter model accounts for the viscosity of the cracking process, but cannot simulate the observed strength increase over a wide range of loading rates. A cracking strain rate-dependent viscosity may solve this problem. It has been shown that the three-parameter model proposed by Bažarit ([1]), where such a dependence is incorporated, can represent the rate dependence over a wide range of loading rates.
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References
Bažant, Z. P. Current status and advances in the theory of creep and interaction with fracture, Creep and Shrink. of Concr. (eds. Z. P. Bažant and I. Carol), E.&F. N. Spon, London, 291–307, 1993.
Bažant, Z. P. and Gettu, R. Rate effects and load relaxation in static fracture of concrete, ACI Materials J., 456–68, 1992.
de Borst, R., Sluys, L. J., Van den Boogaard, A. H. and Van den Bogert, P. A. J. Computational issues in time-dependent deformation and fracture of concrete, Creep and Shrinkage of Concrete (eds. Z. P. Bažant and I. Carol), E.&F. N. Spon, London, 309–26, 1993.
Feenstra, P. H. Computational aspects of biaxial stress in plain and reinforced concrete. Dissertation, Delft Univ. of Techn., Delft, The Netherlands, 1993.
Lourenço, P. B. Computational strategies for masonry structures. Dissertation, Delft Univ. of Techn., Delft, The Netherlands, 1996.
Rüsch, H. Researches toward a general flexural theory for structural concrete, ACI J., 57, 1–28, 1960.
Sluys, L. J. Wave propagation, localisation and dispersion in softening solids. Dissertation, Delft Univ. of Techn., Delft, The Netherlands, 1992.
Van Zijl, G. P. A. G. Computational Modelling of Masonry Creep and Shrinkage. Dissertation (to be published), Delft Univ. of Techn., Delft, The Netherlands, 1999.
Wu, Z. S. and Bažant, Z. P. Finite element modelling of rate effect in concrete fracture with influence of creep, Creep and Shrink. of Concr. (eds. Z. P. Bažant and I. Carol), E.&F. N. Spon, London, 427–32, 1993.
Zhou, F. P. Time-dependent Crack Growth and Fracture in Concrete. Dissertation, Lund Univ., Lund, Sweden, 1992.
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van Zijl, G.P.A.G., Rots, J.G., de Borst, R. (2001). The Physical Role of Crack Rate Dependence in the Long-term Behaviour of Cementitious Materials. In: Ehlers, W. (eds) IUTAM Symposium on Theoretical and Numerical Methods in Continuum Mechanics of Porous Materials. Solid Mechanics and Its Applications, vol 87. Springer, Dordrecht. https://doi.org/10.1007/0-306-46953-7_45
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DOI: https://doi.org/10.1007/0-306-46953-7_45
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