Seismic Behavior and Assessment of Drift-Hardening Concrete Columns
Abstract eng: This paper presents results of an experimental program undertaken to evaluate the seismic performance of concrete circular columns reinforced with ultra-high-strength (UHS) rebars for the purpose of development of resilient concrete columns which are expected to exhibit positive secondary stiffness till large drift and leave small and easily repairable residual deformation even after experiencing potential mega earthquakes. The use of UHS and low-bond strength rebars as longitudinal reinforcement of concrete columns offers several advantages over conventional ductile columns in maintaining stiffness and reducing residual deformation due to the long elastic region of the UHS rebars. Specimens consisted of four 1/3 scale cantilever concrete columns reinforced by eight UHS and low-bond strength rebars (SBPDN 1275/1420) with spiraled groove on their surface. The columns had a circular section of 250 mm in diameter. The experimental variables were; the shear span ratio of column and the applied axial load level. The columns were transversely confined by thin steel plates. The steel plates were formed by connecting two pieces of pre-manufactured semi-circular plates through nuts and bolts.
Contributors:
Conference Title:
Conference Title:
16th World Conference on Earthquake Engineering
Conference Venue:
Santiago (CL)
Conference Dates:
2017-01-09 / 2017-01-13
Rights:
Text je chráněný podle autorského zákona č. 121/2000 Sb.
Record appears in:
Record created 2017-01-18, last modified 2017-01-18
guest ::
