In this work the whole set of residual tensile properties have been assessed, in the framework of a non-local damage approach, for a high performance siliceous concrete (f = 72 MPa) at significant c thermal damage levels (20, 250 and…
In this work the whole set of residual tensile properties have been assessed, in the framework of a non-local damage approach, for a high performance siliceous concrete (f = 72 MPa) at significant c thermal damage levels (20, 250 and 400 °C). The basic idea is that the same concrete, after being exposed to high temperature, can be simply modeled as a different homogeneous material, the mechanical properties of which include all the effects of the undergone thermal damage. A major role is played by the material characteristic length, which takes into account the increasing material heterogeneity, and which has been experimentally identified through cross examination of direct tension tests on notched cylinders and PIED tests.