Calculation of bearing capacity of polypropylene-steel fiber reinforced concrete column under large eccentric loading

ZHANG Guangtai; CAO Yinlong; LI Ruixiang; ZHANG Luyang; CHEN Yong

doi:10.13801/j.cnki.fhclxb.20200201.001

Volume 37 Issue 9

Sep. 2020

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ZHANG Guangtai, CAO Yinlong, LI Ruixiang, et al. Calculation of bearing capacity of polypropylene-steel fiber reinforced concrete column under large eccentric loading[J]. Acta Materiae Compositae Sinica, 2020, 37(9): 2336-2347. doi: 10.13801/j.cnki.fhclxb.20200201.001

Citation:

ZHANG Guangtai, CAO Yinlong, LI Ruixiang, et al. Calculation of bearing capacity of polypropylene-steel fiber reinforced concrete column under large eccentric loading[J]. Acta Materiae Compositae Sinica, 2020, 37(9): 2336-2347. doi: 10.13801/j.cnki.fhclxb.20200201.001

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Calculation of bearing capacity of polypropylene-steel fiber reinforced concrete column under large eccentric loading

doi: 10.13801/j.cnki.fhclxb.20200201.001

Architectural Engineering Institute, Xinjiang University, Xinjiang 830047, China

Received Date: 2019-10-23
Accepted Date: 2020-01-13

Available Online: 2020-02-02

Publish Date: 2020-09-15

Abstract

Abstract

The cube compressive test, axial compressive test and splitting tensile test were conducted on 270 polypropylene-steel fiber/concrete test blocks with polypropylene fiber content (volume fraction) of 0vol%, 0.1vol%, 0.2vol%, 0.3vol%, 0.4vol%, 0.5vol% and steel fiber content (volume fraction) of 0vol%, 0.5vol%, 1vol%, 1.5vol% and 2vol% respectively. Based on the mechanical theory of polypropylene-steel fiber/concrete composites, the strength prediction model was established considering the fiber orientation coefficient, effective length coefficient and interfacial bond coefficient. The mechanism was also analyzed. Six polypropylene-steel fiber/concrete columns were made from polypropylene fiber with a content of 0vol%, 0.1vol%, 0.3vol% and steel fiber with a content of 0vol%, 1.5vol% to perform large eccentric compression test. On the basis of strength prediction model, the bearing capacity of polypropylene-steel fiber/concrete was calculated. The results show that steel fiber can improve the compressive strength, axial compressive strength and splitting tensile strength of polypropylene-steel fiber/concrete. Polypropylene fiber can improve the splitting tensile strength of polypropylene-steel fiber/concrete, but can’t improve the compressive strength. The ultimate bearing capacity of concrete columns can be effectively increased by adding polypropylene-steel fibers.
- steel fiber,
- polypropylene fiber,
- concrete column,
- large eccentric compression,
- ultimate bearing capacity
Long Abstrsct
Innovation Points

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References(20)

References

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