3D-printing ultra-high performance fiber-reinforced concrete under triaxial confining loads

Yang, Y; Wu, C; Liu, Z; Zhang, H

3D-printing ultra-high performance fiber-reinforced concrete under triaxial confining loads

Yang, Y Wu, C

Liu, Z Zhang, H

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Publisher:: ELSEVIER
Publication Type:: Journal Article
Citation:: Additive Manufacturing, 2022, 50
Issue Date:: 2022-02-01

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Field	Value	Language
dc.contributor.author	Yang, Y
dc.contributor.author	Wu, C https://orcid.org/0000-0001-6786-7934
dc.contributor.author	Liu, Z
dc.contributor.author	Zhang, H
dc.date.accessioned	2022-12-20T04:41:43Z
dc.date.available	2022-12-20T04:41:43Z
dc.date.issued	2022-02-01
dc.identifier.citation	Additive Manufacturing, 2022, 50
dc.identifier.issn	2214-8604
dc.identifier.issn	2214-8604
dc.identifier.uri	http://hdl.handle.net/10453/164497
dc.description.abstract	3D-printing concrete structural members may experience complex stress states, while external reinforcement (wrapping steel tube or fiber-reinforced polymer) may be one of the effective ways to improve performance. Therefore, triaxial mechanical properties of 3D-printing concrete should be explored. This study presents an experimental investigation of the triaxial behavior of 3D-printing ultra-high performance fiber-reinforced concrete (3DP-UHPFRC) loaded in the Z-direction. Mold-casting ultra-high performance fiber reinforced concrete (MC-UHPFRC) was used as the reference specimen. Based on the test data, the failure mode and mechanical properties of the 3D-printing specimens were analyzed, and the failure criteria were explored. The experimental results showed that 3DP-UHPFRC possessed triaxial failure modes, mechanical properties, and failure criteria as MC-UHPFRC. All 3DP-UHPFRC specimens exhibited oblique shear cracks under triaxial compression. The fitting effect of Mohr-Coulomb failure criterion on 3D-printing specimens without steel fiber is poor (R2 is less than 0.9), which is due to the linear relationship of Mohr-Coulomb failure criterion and the obvious nonlinear increase in strength of 3D-printing specimens without steel fiber with the confining pressure, whereas the Power-law and Willam-Warnke failure criteria were good for all 3D-printing specimens. A modified model was established for predicting the stress-strain curves of 3DP-UHPFRC under triaxial confining pressure.
dc.language	English
dc.publisher	ELSEVIER
dc.relation	National Natural Science Foundation of China51978186
dc.relation.ispartof	Additive Manufacturing
dc.relation.isbasedon	10.1016/j.addma.2021.102568
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	0910 Manufacturing Engineering
dc.title	3D-printing ultra-high performance fiber-reinforced concrete under triaxial confining loads
dc.type	Journal Article
utslib.citation.volume	50
utslib.for	0910 Manufacturing Engineering
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Civil and Environmental Engineering
pubs.organisational-group	/University of Technology Sydney/Strength - CBI - Centre for Built Infrastructure
utslib.copyright.status	closed_access	*
dc.date.updated	2022-12-20T04:40:12Z
pubs.publication-status	Published
pubs.volume	50

Abstract:

3D-printing concrete structural members may experience complex stress states, while external reinforcement (wrapping steel tube or fiber-reinforced polymer) may be one of the effective ways to improve performance. Therefore, triaxial mechanical properties of 3D-printing concrete should be explored. This study presents an experimental investigation of the triaxial behavior of 3D-printing ultra-high performance fiber-reinforced concrete (3DP-UHPFRC) loaded in the Z-direction. Mold-casting ultra-high performance fiber reinforced concrete (MC-UHPFRC) was used as the reference specimen. Based on the test data, the failure mode and mechanical properties of the 3D-printing specimens were analyzed, and the failure criteria were explored. The experimental results showed that 3DP-UHPFRC possessed triaxial failure modes, mechanical properties, and failure criteria as MC-UHPFRC. All 3DP-UHPFRC specimens exhibited oblique shear cracks under triaxial compression. The fitting effect of Mohr-Coulomb failure criterion on 3D-printing specimens without steel fiber is poor (R2 is less than 0.9), which is due to the linear relationship of Mohr-Coulomb failure criterion and the obvious nonlinear increase in strength of 3D-printing specimens without steel fiber with the confining pressure, whereas the Power-law and Willam-Warnke failure criteria were good for all 3D-printing specimens. A modified model was established for predicting the stress-strain curves of 3DP-UHPFRC under triaxial confining pressure.

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http://hdl.handle.net/10453/164497