Cyclic loading test for reinforced concrete columns with continuous rectangular and polygonal hoops

•Tests were performed to investigate the performance of the columns with continuous hoops.•The test parameters were the shape, spacing, and bar diameter of the continuous hoops.•The performance of the specimens was compared with that of a column with conventional ties.•On the basis of the test resul...

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Bibliographic Details
Published in:Engineering structures 2014-05, Vol.67, p.39-49
Main Authors: Eom, Tae-Sung, Kang, Su-Min, Park, Hong-Gun, Choi, Tae-Woo, Jin, Jong-Min
Format: Article
Language:English
Subjects:
Applied sciences
Bars
Building structure
Buildings. Public works
Columns
Columns (structural)
Construction (buildings and works)
Continuous hoop
Cyclic loads
Cyclic test
Durability. Pathology. Repairing. Maintenance
Economics
Exact sciences and technology
Fatigue (materials)
Hoops
Reinforced concrete
Reinforced concrete structure
Reinforcement
Repair (reinforcement, strenthening)
Tie
Transverse reinforcement
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Summary:•Tests were performed to investigate the performance of the columns with continuous hoops.•The test parameters were the shape, spacing, and bar diameter of the continuous hoops.•The performance of the specimens was compared with that of a column with conventional ties.•On the basis of the test results, the effects of the continuous hoops were evaluated.•Requirements for vertical spacing of transverse reinforcement for RC column were studied. A re-bar fabrication method using continuously wound rectangular or polygonal ties (or continuous hoops) was developed to enhance constructability and economy of reinforced concrete columns. In the present study, cyclic loading tests were performed to investigate the structural performance of the columns with continuous hoops. The test parameters were the shape, spacing, and bar diameter of the continuous hoops, and the spacing between the longitudinal bars and the hoops. The load-carrying capacity, deformation capacity, and failure mode of the specimens were directly compared with those of a column with conventional ties. On the basis of the test results, the effects of the continuous hoops were evaluated. Further, requirements for the vertical spacing of transverse reinforcement were studied to restrain the post-yield buckling of longitudinal bars in the plastic hinge zone.
ISSN:0141-0296
1873-7323
DOI:10.1016/j.engstruct.2014.02.023