Meso-scale numerical simulation of axial compression performance of fiber reinforced polymer composite-confined ultra-high performance concrete

TIAN Huiwen; ZHOU Zhen; LU Jiping; PENG Zhen

doi:10.13801/j.cnki.fhclxb.20190827.001

Volume 37 Issue 7

Aug. 2020

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TIAN Huiwen, ZHOU Zhen, LU Jiping, et al. Meso-scale numerical simulation of axial compression performance of fiber reinforced polymer composite-confined ultra-high performance concrete[J]. Acta Materiae Compositae Sinica, 2020, 37(7): 1629-1638. doi: 10.13801/j.cnki.fhclxb.20190827.001

Citation:

TIAN Huiwen, ZHOU Zhen, LU Jiping, et al. Meso-scale numerical simulation of axial compression performance of fiber reinforced polymer composite-confined ultra-high performance concrete[J]. Acta Materiae Compositae Sinica, 2020, 37(7): 1629-1638. doi: 10.13801/j.cnki.fhclxb.20190827.001

Citation:

TIAN Huiwen, ZHOU Zhen, LU Jiping, et al. Meso-scale numerical simulation of axial compression performance of fiber reinforced polymer composite-confined ultra-high performance concrete[J]. Acta Materiae Compositae Sinica, 2020, 37(7): 1629-1638. doi: 10.13801/j.cnki.fhclxb.20190827.001

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Meso-scale numerical simulation of axial compression performance of fiber reinforced polymer composite-confined ultra-high performance concrete

doi: 10.13801/j.cnki.fhclxb.20190827.001

Key Laboratory of Concrete and Prestressed Concrete Structures of the Ministry of Education, Southeast University, Nanjing 210096, China

Received Date: 2019-07-12
Accepted Date: 2019-08-19

Available Online: 2019-08-28

Publish Date: 2020-07-15

Abstract

Abstract

To investigate the axial compressive performance of fiber reinforced polymer (FRP) composite-confined ultra-high performance concrete (UHPC) cylindrical specimens, the meso-scale finite element model was established in LS-DYNA and validated by the comparison of the experimental data. The formula of shear dilation parameter of K&C model was proposed, which could accurately reflect the FRP composites confinement for UHPC. Based on the validated model, a parametric analysis was conducted to investigate the influence of FRP composite tube thickness, FRP composites fiber winding angle and steel fiber content. The results show that the model can not only capture the effect of random distributed steel fibers on the specimen stress distribution, but also accurately reflect the enhancement of strength and ductility of UHPC core subjected to FRP composite confinement. Good agreement is found in failure modes and stress-strain curves between simulation and experimental results. Parametric studies show that with the increase of FRP composite tubes thickness and FRP composite fiber winding angle, the strength and ductility of the FRP composite-confined UHPC specimens are significantly enhanced. An increase in steel fiber content can effectively restrain the inclined shear cracks in UHPC core, but has little effect on the strength and ductility of the specimens.
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References(22)

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