Fire damaged ultra-high performance concrete (UHPC) under coupled axial static and impact loading

Liu, K; Wu, C; Li, X; Tao, M; Li, J; Liu, J; Xu, S

Fire damaged ultra-high performance concrete (UHPC) under coupled axial static and impact loading

Liu, K Wu, C

Li, X Tao, M Li, J

Liu, J Xu, S

Permalink

Publisher:: ELSEVIER SCI LTD
Publication Type:: Journal Article
Citation:: Cement and Concrete Composites, 2022, 126
Issue Date:: 2022-02-01

Closed Access

	Filename	Description	Size
	Fire damaged ultra-high performance concrete (UHPC) under coupled axial static and impact loading.pdf	Published version	11.73 MB	Adobe PDF	View/Open

Copyright Clearance Process

Recently Added
In Progress
Closed Access

This item is closed access and not available.

Full metadata record

Field	Value	Language
dc.contributor.author	Liu, K
dc.contributor.author	Wu, C https://orcid.org/0000-0001-6786-7934
dc.contributor.author	Li, X
dc.contributor.author	Tao, M
dc.contributor.author	Li, J https://orcid.org/0000-0003-2457-1994
dc.contributor.author	Liu, J
dc.contributor.author	Xu, S
dc.date.accessioned	2023-03-26T22:03:59Z
dc.date.available	2023-03-26T22:03:59Z
dc.date.issued	2022-02-01
dc.identifier.citation	Cement and Concrete Composites, 2022, 126
dc.identifier.issn	0958-9465
dc.identifier.issn	1873-393X
dc.identifier.uri	http://hdl.handle.net/10453/168435
dc.description.abstract	The load bearing structural components such as columns could experience axial static loads during the service life. High temperature induced by fire would have a significant detrimental impact on the mechanical properties of concrete materials. The structure could be severely damaged as the column was simultaneously loaded by other impact loads. In this study, the behavior of fire damaged ultra-high performance concrete (UHPC) with a compressive strength of 128.3 MPa under coupled axial static and impact loading was studied. UHPC specimens were heated to the target temperatures (250, 500 and 750 °C) in an electric furnace and then naturally cooled down to room temperature. The results demonstrated that the P-wave velocity and compressive strength of the heated-cooled treatment UHPC degraded significantly as the target temperature exceeded 250 °C. The impact tests were then conducted on the heated-cooled treatment UHPC specimens with axial static compression. The experimental results indicated that the axial static compression could enhance the dynamic mechanical properties such as compressive strength and elastic modulus in the elastic phase and weaken the dynamic mechanical properties in the plastic phase. In addition, the dynamic increase factor (DIF) of UHPC exhibited an increase with the temperature. The UHPC specimen could withstand a temperature of 250 °C, but lost most of its strength at temperatures of 500 and 750 °C. Thus, the axially loaded static force accelerated the failure of the specimen after being heated to above 250 °C.
dc.language	English
dc.publisher	ELSEVIER SCI LTD
dc.relation	National Natural Science Foundation of China51978186
dc.relation.ispartof	Cement and Concrete Composites
dc.relation.isbasedon	10.1016/j.cemconcomp.2021.104340
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	0904 Chemical Engineering, 0905 Civil Engineering, 1202 Building
dc.subject.classification	Building & Construction
dc.title	Fire damaged ultra-high performance concrete (UHPC) under coupled axial static and impact loading
dc.type	Journal Article
utslib.citation.volume	126
utslib.for	0904 Chemical Engineering
utslib.for	0905 Civil Engineering
utslib.for	1202 Building
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	2023-03-26T22:03:57Z
pubs.publication-status	Published
pubs.volume	126

Abstract:

The load bearing structural components such as columns could experience axial static loads during the service life. High temperature induced by fire would have a significant detrimental impact on the mechanical properties of concrete materials. The structure could be severely damaged as the column was simultaneously loaded by other impact loads. In this study, the behavior of fire damaged ultra-high performance concrete (UHPC) with a compressive strength of 128.3 MPa under coupled axial static and impact loading was studied. UHPC specimens were heated to the target temperatures (250, 500 and 750 °C) in an electric furnace and then naturally cooled down to room temperature. The results demonstrated that the P-wave velocity and compressive strength of the heated-cooled treatment UHPC degraded significantly as the target temperature exceeded 250 °C. The impact tests were then conducted on the heated-cooled treatment UHPC specimens with axial static compression. The experimental results indicated that the axial static compression could enhance the dynamic mechanical properties such as compressive strength and elastic modulus in the elastic phase and weaken the dynamic mechanical properties in the plastic phase. In addition, the dynamic increase factor (DIF) of UHPC exhibited an increase with the temperature. The UHPC specimen could withstand a temperature of 250 °C, but lost most of its strength at temperatures of 500 and 750 °C. Thus, the axially loaded static force accelerated the failure of the specimen after being heated to above 250 °C.

Please use this identifier to cite or link to this item:

http://hdl.handle.net/10453/168435