Spatially random modulus and tensile strength: Contribution to variability of strain, damage, and fracture in concrete

This paper explores the computational modeling of nonlocal strain, damage, and fracture in concrete, considering isolated contribution two random, spatially variable properties related to process: Young’s modulus (E) tensile strength (f t ). Applying a continuum damage model, heterogeneous specimens concrete with random varying E or f were found produce substantial differences when contrasted traditional homogeneous (non-random) specimens. These include uncertain strain wandering failure paths, differing (sometimes lower) peak forces, i.e. increased probabilities It is that variability contributes more (from 1.7 up 4 times more, depending on parameter) overall performance than variability, which has comparatively lower contribution. Performance evaluated using (1) force-displacement response, (2) individual, average, standard deviation maps non-local (3) paths values along fractures. The methodology illustrated for specimen geometries: square plate circular hole, an L-shaped plate. results correlate well reported experimental data