Calibration of KCC concrete model for UHPC against low-velocity impact

Xu, S; Wu, P; Wu, C

Calibration of KCC concrete model for UHPC against low-velocity impact

Xu, S Wu, P Wu, C

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Publisher:: Elsevier BV
Publication Type:: Journal Article
Citation:: International Journal of Impact Engineering, 2020, 144, pp. 103648-103648
Issue Date:: 2020-10-01

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Field	Value	Language
dc.contributor.author	Xu, S
dc.contributor.author	Wu, P
dc.contributor.author	Wu, C https://orcid.org/0000-0001-6786-7934
dc.date.accessioned	2020-11-07T00:45:04Z
dc.date.available	2020-11-07T00:45:04Z
dc.date.issued	2020-10-01
dc.identifier.citation	International Journal of Impact Engineering, 2020, 144, pp. 103648-103648
dc.identifier.issn	0734-743X
dc.identifier.uri	http://hdl.handle.net/10453/143816
dc.description.abstract	© 2020 Elsevier Ltd As an innovative material, UHPC (ultra-high performance concrete) is regarded as a promising material to improve dynamic resistant performance of civil engineering structures suffered from extreme loadings such as blast, shock and impact loading. The mechanical properties of UHPC members suffered from static/dynamic loading have been systematically investigated through many physical experiments. However, the rationality of the constitutive model utilized in numerical simulations (especially the finite element simulations) to precisely describe behaviors of UHPC has been little emphasized. The objective of this study, therefore, is to calibrate the KCC (Karagozian & Case Concrete) model to effectively predict behaviors of UHPC suffered from low-velocity impact loading. At the beginning, the properties of UHPC under triaxial compression were experimentally investigated by a series of triaxial compression tests to obtain the parameters of three strength surfaces by experimental data fitting. Meanwhile, EoS (equation of state) was derived by the combination of hydro-static compression test, “p-alpha equation” and Mie–Grueneisen equation of state. Moreover, suitable damage parameters were given by repeated trials, and the suitable model of strain-rate effect for UHPC was also suggested. The single element analysis results indicate that the calibrated KCC model can reasonably reflect the behaviors of UHPC under the uniaxial and triaxial stress state. Eventually, numerical results of low-velocity impact tests of UHPC columns and beams based on the calibrated KCC model agree very well with the tests results, which indicates the rationality of the calibrated KCC model for numerical simulations on low-velocity impact.
dc.language	en
dc.publisher	Elsevier BV
dc.relation.ispartof	International Journal of Impact Engineering
dc.relation.isbasedon	10.1016/j.ijimpeng.2020.103648
dc.rights	info:eu-repo/semantics/restrictedAccess
dc.subject	0901 Aerospace Engineering, 0905 Civil Engineering, 0913 Mechanical Engineering
dc.subject.classification	Mechanical Engineering & Transports
dc.title	Calibration of KCC concrete model for UHPC against low-velocity impact
dc.type	Journal Article
utslib.citation.volume	144
utslib.for	0901 Aerospace Engineering
utslib.for	0905 Civil Engineering
utslib.for	0913 Mechanical Engineering
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Strength - CBI - Centre for Built Infrastructure
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
utslib.copyright.status	closed_access	*
dc.date.updated	2020-11-07T00:44:54Z
pubs.publication-status	Published
pubs.volume	144

Abstract:

© 2020 Elsevier Ltd As an innovative material, UHPC (ultra-high performance concrete) is regarded as a promising material to improve dynamic resistant performance of civil engineering structures suffered from extreme loadings such as blast, shock and impact loading. The mechanical properties of UHPC members suffered from static/dynamic loading have been systematically investigated through many physical experiments. However, the rationality of the constitutive model utilized in numerical simulations (especially the finite element simulations) to precisely describe behaviors of UHPC has been little emphasized. The objective of this study, therefore, is to calibrate the KCC (Karagozian & Case Concrete) model to effectively predict behaviors of UHPC suffered from low-velocity impact loading. At the beginning, the properties of UHPC under triaxial compression were experimentally investigated by a series of triaxial compression tests to obtain the parameters of three strength surfaces by experimental data fitting. Meanwhile, EoS (equation of state) was derived by the combination of hydro-static compression test, “p-alpha equation” and Mie–Grueneisen equation of state. Moreover, suitable damage parameters were given by repeated trials, and the suitable model of strain-rate effect for UHPC was also suggested. The single element analysis results indicate that the calibrated KCC model can reasonably reflect the behaviors of UHPC under the uniaxial and triaxial stress state. Eventually, numerical results of low-velocity impact tests of UHPC columns and beams based on the calibrated KCC model agree very well with the tests results, which indicates the rationality of the calibrated KCC model for numerical simulations on low-velocity impact.

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http://hdl.handle.net/10453/143816