Criterion of Concrete Strength under Volumetric Stress State and Elevated Temperatures

Abstract

The construction and design of massive buildings and structures operating under the simultaneous action of non-axial force loading and temperature effects require the development of appropriate calculation methods. The paper deals with the construction of strength criteria for concrete structures under a volumetric stressed state in the case of joint action of force stresses and elevated temperatures. A full range of dependencies for the strength criteria of concrete under elevated temperatures – in triaxial compression, compression-tension, and triaxial tension – has been developed. The theoretical curves of strength criteria for all three cases are constructed on the example of concrete of compressive strength class B60.