Behaviour of Reinforced Ultra-High Performance Concrete Components Subjected to Low-Velocity Impact Loading

Wei, Jie (Jasper)

Behaviour of Reinforced Ultra-High Performance Concrete Components Subjected to Low-Velocity Impact Loading

Wei, Jie (Jasper)

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Publication Type:: Thesis
Issue Date:: 2021

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Field	Value	Language
dc.contributor.author	Wei, Jie (Jasper)
dc.date.accessioned	2022-04-13T00:38:30Z
dc.date.available	2022-04-13T00:38:30Z
dc.date.issued	2021
dc.identifier.uri	http://hdl.handle.net/10453/156167
dc.description	University of Technology Sydney. Faculty of Engineering and Information Technology.	en_US.UTF-8
dc.description.abstract	Reinforced concrete (RC) members are extensively employed in buildings and infrastructures. The lateral loading capacity of RC members shall be properly considered for accidental impact loads during their service period. UHPC is regarded as a promising material to resist impact loadings. This study seeks to develop a strengthening method based on UHPC to improve the structural performance under impact loading. Towards this aim, the behaviour of the axially loaded UHPC and RC components against low-velocity impact loads were examined through experimental and numerical tests. Based on test results, impact mass-velocity (M-V) diagrams were developed to quick assess the structural damage. Then, hybrid fibre reinforcement in UHPC was studied to achieve better cost-effectiveness. Compared with UHPC with single fibres, UHPC with hybrid fibres exhibited higher flexural strength and fracture energy at the material level, and better impact resistance at the structural level. Due to the high mechanical performance of UHPC, new structural designs, including hollow cross-section design and alternative reinforcement in UHPC components, were proposed, and their impact-resisting performance was experimentally and numerically investigated. UHPC was also studied as retrofitting/strengthening material. After UHPC overlay strengthening, punching shear damage could be greatly mitigated in the RC components under dynamic impact loads.	en_US.UTF-8
dc.format	Thesis (PhD)
dc.language.iso	en_US	en_US.UTF-8
dc.relation	https://opus.lib.uts.edu.au/bitstream/10453/156167/2/02whole.pdf
dc.rights	The author owns the copyright in this thesis including all reproduction and reuse rights for the work. The work may not be altered without the permission of the copyright owner. Attribution is essential when quoting or paraphrasing from this thesis.
dc.rights	au.edu.uts.lib/ppc
dc.rights	info:eu-repo/semantics/openAccess
dc.title	Behaviour of Reinforced Ultra-High Performance Concrete Components Subjected to Low-Velocity Impact Loading	en_US.UTF-8
dc.type	Thesis
utslib.copyright.status	open_access	*

Abstract:

Reinforced concrete (RC) members are extensively employed in buildings and infrastructures. The lateral loading capacity of RC members shall be properly considered for accidental impact loads during their service period. UHPC is regarded as a promising material to resist impact loadings. This study seeks to develop a strengthening method based on UHPC to improve the structural performance under impact loading. Towards this aim, the behaviour of the axially loaded UHPC and RC components against low-velocity impact loads were examined through experimental and numerical tests. Based on test results, impact mass-velocity (M-V) diagrams were developed to quick assess the structural damage. Then, hybrid fibre reinforcement in UHPC was studied to achieve better cost-effectiveness. Compared with UHPC with single fibres, UHPC with hybrid fibres exhibited higher flexural strength and fracture energy at the material level, and better impact resistance at the structural level. Due to the high mechanical performance of UHPC, new structural designs, including hollow cross-section design and alternative reinforcement in UHPC components, were proposed, and their impact-resisting performance was experimentally and numerically investigated. UHPC was also studied as retrofitting/strengthening material. After UHPC overlay strengthening, punching shear damage could be greatly mitigated in the RC components under dynamic impact loads.

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http://hdl.handle.net/10453/156167