Experimental Study on Seismic Capacity of Reinforced Concrete Composite Columns Based on a High-ductile Fiber Cementitious Composite

The authors examined the application of a high-ductile fiber cementitious composite (HDFC) to develop seismic-improved reinforced-concrete columns. HDFC was manufactured to show high-ductile tensile strains above 2.0%, sustaining tensile stress after cracks and developing multiple micro-cracks while...

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Bibliographic Details
Published in:International journal of concrete structures and materials 2019, 13(3), 47, pp.353-362
Main Authors: Cho, Chang-Geun, Cheong, Sang-Hyeon, Moon, Hyung-Ju, Kim, Ho-Yeon, Lee, Kang-Seok
Format: Article
Language:English
Subjects:
Building Materials
Cement reinforcements
Composite columns
Concrete
concrete column
Concrete columns
Cracks
Cyclic loads
Ductile fracture
Engineering
high-ductile fiber cementitious composite (HDFC)
Load tests
Materials fatigue
Microcracks
Performance enhancement
Plastic properties
precast box
Precast concrete
Reinforced concrete
Seismic engineering
seismic improvement
Seismic response
Solid Mechanics
Structural Materials
Tensile stress
토목공학
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Summary:The authors examined the application of a high-ductile fiber cementitious composite (HDFC) to develop seismic-improved reinforced-concrete columns. HDFC was manufactured to show high-ductile tensile strains above 2.0%, sustaining tensile stress after cracks and developing multiple micro-cracks while avoiding crack localization. To seismically improve a reinforced-concrete column, a precast box made of HDFC was applied locally at the flexural critical region in the column plastic hinge zone; a construction process is also proposed. In seismic performance evaluations of the developed column, a series of cyclic load tests was conducted by manufacturing four column specimens. It was shown from experiments that the developed reinforced concrete and HDFC composite columns showed not only improved seismic performances but also minimized bending and shear cracks in the flexural critical region of the column.
ISSN:1976-0485
2234-1315
DOI:10.1186/s40069-018-0324-x