ABSTRACT
Under cyclic loading, the mechanical properties of a bolting system were experimentally investigated. Generally, the pullout load of cement bonded bolts showed double peaks whereas it was observed that resin bonded bolts had a single peak. The pullout tests also proved that bolting system had a deformation-memory capacity under specific cyclic patterns. A bolting system could creep after a period of cyclic loading, particularly under high pullout loads. Hysteresis loop was rarely captured in pullout tests of bolts. An explanation was that the outward movement of the bolt under pullout loading could not recover when the pull load was removed. The failure modes of resin and cement bonded bolts were different. Reversed cone shaped resin agglomerate, flake shaped scrap, and bolt-resin interface decoupling were the three most dominating failure modes for resin bonded specimens. Annulus-shaped bonding block, brittle collapse, and cement-tube interface decoupling were the three most dominating failure modes for cement bonded specimens.
