Abstract
Composite bridge pier consisting of steel pipes with external ribs and concrete can reduce construction work by replacing a part of reinforcing bars with steel tube. Authors have arranged and evaluated inelastic behavior of 15 specimens subjecting to cyclic lateral loading, and then we defined limit deformation to hold bearing force, furthermore analyzed the causes affecting deformation capacity. The results showed that deformation capacity has high correlation to ratio of the volume of transverse confining rebars to the volume of confined concrete core and ratio of flexural shear strength. In this paper, we found that the concept of coefficient “κ” in consideration of these causes can evaluate deformation capacity with comparatively sufficient accuracy.
