Study on Bond-Slip Behaviors of Self-Stressing Steel Slag Concrete-Filled Steel Tube

摘要: The bond-slip behaviors of self-stressing steel slag concrete filled tubes (SSSSCFST) are investigated by carrying out the push-out tests. influence thickness to diameter ratio, confining parameter and expansion ratio (SSC) on performance analyzed. Investigations failure modes each specimen indicate that shear bond interface dominates specimen. Further, three stages load-slip relationship curve slip was observed, i.e., loading stage, descending section constant load section. In section, with increase in or parameter, bonding force improves firstly then decreases. Besides, interfacial strength increases enhancement ratio. raises improvement diameter-thickness while decreases as increase. Moreover, considered parameters ultimate is Finally, a theoretical model for SSSSCFST proposed accounting non-uniform distribution strength. It indicates can well capture main features exhibited during whole process test.