Database for research project entitled Shear Behavior of PCI-UHPC Members Considering Size Effects

This project investigated the size effects in ultra-high-performance concrete (UHPC) using the Universal Panel Tester (UPT) at the University of Houston. The experimental program included five shear panels of varying depths and widths, complemented by uniaxial tensile tests and fiber alignment analyses. Two sources of size effect were identified in the panel tests: (1) the depth size effect, recognized previously for conventional concrete, and (2) a fiber alignment effect, which varies with the formwork size in the direction of casting. Test data showed that the depth size effect is less pronounced in UHPC than conventional concrete. Existing UHPC beam shear datasets corroborated the fiber alignment effect observed in panels while showing that it can vary with the fiber dimensions.