Effectiveness of low-cost fiber-reinforced cement composites in hollow columns under cyclic loading

•The effectiveness of low-cost FRCCs was investigated on the seismic performance of hollow columns.•The stress–strain relationship was more ductile in both compression and tension when 2% fiber ratio (vs. 1%) was used.•The load-drift responses of the FRCC specimens, even with no transverse reinforce...

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Bibliographic Details
Published in:Construction & building materials 2013-10, Vol.47, p.623-635
Main Authors: Shin, Myoungsu, Choi, Yoon-Young, Kim, Ick-Hyun, Lee, Kihak
Format: Article
Language:English
Subjects:
Analysis
Cement
Damage control
Displacement ductility
Economic aspects
Energy dissipation
Fiber-reinforced cement composites
Hollow column
Hydraulic actuators
Reinforced concrete
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Summary:•The effectiveness of low-cost FRCCs was investigated on the seismic performance of hollow columns.•The stress–strain relationship was more ductile in both compression and tension when 2% fiber ratio (vs. 1%) was used.•The load-drift responses of the FRCC specimens, even with no transverse reinforcement, were stable up to 3% or 4% drift.•The higher fiber ratio improved energy dissipation, but 1% fiber ratio did not ensure satisfactory energy dissipation.•The exclusion of coarse aggregates did not distinguish the seismic performance of the specimens with 1% fiber ratio. This study is to investigate the effectiveness of low-cost fiber-reinforced cement composites (FRCCs) on improving the seismic performance of hollow bridge columns. FRCCs with an economical type of hooked steel fibers were used. Five 1/4-scale rectangular hollow columns were tested under quasi-static lateral cyclic loading. The main test variables included steel fiber volumetric ratio (0%, 1%, or 2%), the presence of coarse aggregates, and column length-to-depth ratio (2 or 3). In all specimens, no transverse reinforcement was provided to identify the sole contribution of concrete or FRCCs on the confinement as well as the shear strength. The specimens having FRCCs exhibited stable inelastic load–displacement responses up to 3% or 4% drift, even though they suffered severe shear cracks. In contrast, one specimen with normal concrete only showed very limited ductility. The specimen with the higher fiber ratio generally achieved the larger displacement ductility and the greater energy dissipation, and also better sustained intensive cracking damage.
ISSN:0950-0618
DOI:10.1016/j.conbuildmat.2013.05.053