ISSN:
1570-1468
Source:
Springer Online Journal Archives 1860-2000
Topics:
Energy, Environment Protection, Nuclear Power Engineering
Notes:
Conclusions 1. Discontinuity of the cross sections has a direct effect on the coefficient of alteration of the secant modulus of deformation and leads to the development of unique nonlinear (pseudoplastic) deformations, which are partially recoverable. 2. The permanent part of deformations in the case of short-time unloading depends on the occurrence of a secondary field of stressesσ on the sides of closed cracks (squeezing stresses), which, along with the effect of some growth of cracks, determine the character of curvature of theσ-ε diagram on the unloading and subsequent loading branches. 3. Discontinuity especially affects the development of creep, leading to violation of the principle of superposition of influences with the use of stressesσ (traditionally referred to the total cross-sectional area), whereas with the use of real stressesσ referred to the continuous part of the section this principle can be preserved. The uncoordinated scheme of formation and closing of cracks is the most exact for concrete. 4. Consideration of the indicated factors permits constructing a more accurate model of deformation of concrete in short- and long-time tension regimes.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01545760
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