Criterion of Crack Resistance of Corrosion Damaged Concrete in Plane Stress State

摘要

A criterion of crack resistance corrosion damaged concrete in plane stress state with colmatation transformation of the concrete structure is built in the coordinate system of the principal normal stresses. Criterion of crack resistance is described by the elliptic curve typical dimensions of which are determined by the kinetics parameters of corrosion damage progress in time and by depth of damages, level and sign of the stress state. This criterion allows taking into account changes in the structure of concrete at various kinds of stress state (tension - tension, compression - compression and tension - compression) with respect to the characteristic types of possible cracks in plane stressed elements. The resulting criterion is quite general and can be used not only for the evaluation of crack resistance for plane stressed concrete and reinforced concrete elements, as well as for solving problems of exposure of residual resource and survivability of exploited reinforced concrete structures under the simultaneous display of force and environmental impacts over time.