Calibration of CSCM model for numerical modeling of UHPCFTWST columns against monotonic lateral loading

Xu, S; Wu, P; Liu, Z; Wu, C

Calibration of CSCM model for numerical modeling of UHPCFTWST columns against monotonic lateral loading

Xu, S Wu, P Liu, Z Wu, C

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Publisher:: Elsevier
Publication Type:: Journal Article
Citation:: Engineering Structures, 2021, 240, pp. 1-18
Issue Date:: 2021-08-01

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Field	Value	Language
dc.contributor.author	Xu, S
dc.contributor.author	Wu, P
dc.contributor.author	Liu, Z
dc.contributor.author	Wu, C https://orcid.org/0000-0001-6786-7934
dc.date.accessioned	2022-03-07T03:07:49Z
dc.date.available	2022-03-07T03:07:49Z
dc.date.issued	2021-08-01
dc.identifier.citation	Engineering Structures, 2021, 240, pp. 1-18
dc.identifier.issn	0141-0296
dc.identifier.issn	1873-7323
dc.identifier.uri	http://hdl.handle.net/10453/155007
dc.description.abstract	The objective of this study is to calibrate continuous surface cap model (CSCM) for ultra-high-performance concrete (UHPC), and then to investigate the structural behavior of UHPC filled thin-walled steel tubular (UHPCFTWST) column against monotonic lateral loading via numerical simulation of nonlinear pushover analysis. The parameters of CSCM model for UHPC were derived via fitting experimental data of a series of tests on UHPC under uniaxial/triaxial states. Subsequently, a detailed 3D FE (finite element) model of UHPCFTWST column against monotonic lateral loading was developed and validated. After that, the effect of main design parameters, including steel ratio, steel grade, axial compression ratio, dosage of steel fiber, and bonding strength, on the structural behavior of UHPCFTWST column against monotonic lateral loading was investigated via a parametric study based on the FE model. Eventually, the axial pressure-moment (P-M) interaction diagram of a specified UHPCFTWST column was derived to illustrate the sectional response. Comparisons of the lateral behavior of UHPCFTWST column with that of normal strength concrete (NSC) filled steel tubular (NSCFST) column were also made for better illustrations. It indicates that the lateral load capacity and ductility were both improved with the increase of steel ratio, whereas the increase of steel grade improved the lateral load capacity but reduced the ductility owing to the increase of yield drift ratio. Moreover, the increase of axial compression ratio improved the lateral load capacity but significantly degraded the ductility. Although the increase of the dosage of steel fiber improved the lateral load capacity and ductility, but a suitable volume ratio should be specified in consideration of the cost. The comparisons with NSCFST column indicated the advantage and potential of UHPC application to concrete filled steel tubular (CFST) column with a thinner steel tube and a higher grade of steel. The P-M interaction diagram of UHPCFTWST column exceeds that of NSCFST column by a large extent, which indicates a greater safety redundancy.
dc.language	English
dc.publisher	Elsevier
dc.relation	National Natural Science Foundation of China51978186
dc.relation.ispartof	Engineering Structures
dc.relation.isbasedon	10.1016/j.engstruct.2021.112396
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	0905 Civil Engineering, 0912 Materials Engineering, 0915 Interdisciplinary Engineering
dc.subject.classification	Civil Engineering
dc.title	Calibration of CSCM model for numerical modeling of UHPCFTWST columns against monotonic lateral loading
dc.type	Journal Article
utslib.citation.volume	240
utslib.for	0905 Civil Engineering
utslib.for	0912 Materials Engineering
utslib.for	0915 Interdisciplinary 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	*
pubs.consider-herdc	false
dc.date.updated	2022-03-07T03:07:42Z
pubs.publication-status	Published
pubs.volume	240

Abstract:

The objective of this study is to calibrate continuous surface cap model (CSCM) for ultra-high-performance concrete (UHPC), and then to investigate the structural behavior of UHPC filled thin-walled steel tubular (UHPCFTWST) column against monotonic lateral loading via numerical simulation of nonlinear pushover analysis. The parameters of CSCM model for UHPC were derived via fitting experimental data of a series of tests on UHPC under uniaxial/triaxial states. Subsequently, a detailed 3D FE (finite element) model of UHPCFTWST column against monotonic lateral loading was developed and validated. After that, the effect of main design parameters, including steel ratio, steel grade, axial compression ratio, dosage of steel fiber, and bonding strength, on the structural behavior of UHPCFTWST column against monotonic lateral loading was investigated via a parametric study based on the FE model. Eventually, the axial pressure-moment (P-M) interaction diagram of a specified UHPCFTWST column was derived to illustrate the sectional response. Comparisons of the lateral behavior of UHPCFTWST column with that of normal strength concrete (NSC) filled steel tubular (NSCFST) column were also made for better illustrations. It indicates that the lateral load capacity and ductility were both improved with the increase of steel ratio, whereas the increase of steel grade improved the lateral load capacity but reduced the ductility owing to the increase of yield drift ratio. Moreover, the increase of axial compression ratio improved the lateral load capacity but significantly degraded the ductility. Although the increase of the dosage of steel fiber improved the lateral load capacity and ductility, but a suitable volume ratio should be specified in consideration of the cost. The comparisons with NSCFST column indicated the advantage and potential of UHPC application to concrete filled steel tubular (CFST) column with a thinner steel tube and a higher grade of steel. The P-M interaction diagram of UHPCFTWST column exceeds that of NSCFST column by a large extent, which indicates a greater safety redundancy.

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