Modified Damage Model of Aeolian Sand Self-Compacting Concrete

Modeling of concrete damage is an important branch of concrete structural analysis; however, the damage behavior of different types of concrete varies. In this study, mechanical property tests were conducted to modify the damage model for aeolian sand self-compacting concrete (ASSC). Damage behaviors and stress-strain curves of prismatic ASSC specimens were investigated using the XTDIC technique, which demonstrated the increasingly decreased peak strain and deteriorated ductility of concrete with the increase of replacement rate of aeolian sand (AS). On the basis of the experimental results, the model proposed by Mazars and colleagues was modified, where scaling factors were introduced. Numerical simulations with the modified model were performed on the ANSYS platform using the Usermat subroutine and its mesh dependency was verified. The results revealed that the modified model could better reflect the effect of AS addition on the concrete structure, and it was less sensitive to the mesh accuracy.