COLUMN COMPLXED WITH CONCRETE AND STEEL TUBE

摘要

PURPOSE: A concrete-steel tube composite column is provided to prevent the performance degradation of a steel tube by improving bonding strength of the contact portion of the steel tube and concrete. CONSTITUTION: A concrete-steel tube composite column comprises a steel tube(10,20), concrete(30), and multiple friction bars(41,42). The steel tube has a hollow structure. The concrete is placed on the inner side or outer side of the steel tube. The friction bars are attached along the inner surface or outer surface of the steel tube touching the concrete and increase frictional force between the concrete and the steel tube.