Strengthening of existing composite steel-concrete beams utilising bolted shear connectors and welded studs

Pathirana, SW; Uy, B; Mirza, O; Zhu, X

Strengthening of existing composite steel-concrete beams utilising bolted shear connectors and welded studs

Pathirana, SW Uy, B Mirza, O Zhu, X

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Publisher:: ELSEVIER SCI LTD
Publication Type:: Journal Article
Citation:: Journal of Constructional Steel Research, 2015, 114, pp. 417-430
Issue Date:: 2015-11-01

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Field	Value	Language
dc.contributor.author	Pathirana, SW
dc.contributor.author	Uy, B
dc.contributor.author	Mirza, O
dc.contributor.author	Zhu, X https://orcid.org/0000-0001-5083-9320
dc.date.accessioned	2023-03-27T21:32:59Z
dc.date.available	2023-03-27T21:32:59Z
dc.date.issued	2015-11-01
dc.identifier.citation	Journal of Constructional Steel Research, 2015, 114, pp. 417-430
dc.identifier.issn	0143-974X
dc.identifier.issn	1873-5983
dc.identifier.uri	http://hdl.handle.net/10453/168615
dc.description.abstract	This paper considers the flexural behaviour of steel-concrete composite beams retrofitted with two types of bolted connectors and welded stud connectors. Three composite beams, one from each connector type, and four non-composite beams were cast together. Three of the non-composite beams were retrofitted using the three connector types respectively. The connectors were installed through holes cored in the concrete slabs of the beams. The holes were backfilled using structural grout. The beams were then tested under static flexural loading. The load-slip behaviour of these connectors under normal and retrofitted conditions was investigated using push-tests. The flexural behaviour of the retrofitted beams was compared with that of the normal composite beams and non-composite beams. The ultimate loads of the test specimens were compared with the design ultimate loads of these beams calculated using Rigid Plastic Analysis (RPA). The vertical deflection of the beams under serviceable load regimes was also compared. The beam experiments were simulated using Finite Element (FE) models developed with ABAQUS. Material models with damage parameters were specified for the concrete and grout used in the test specimens using the Concrete Damage Plasticity (CDP) option. The effects of the concrete and grout strength, grout-hole size and shear connection ratio on the flexural behaviour of retrofitted beams were investigated by carrying out a parametric analysis. The results obtained from full-scale beam and push-test experiments and also the analytical results from RPA and FE analyses are presented and discussed in detail in this paper.
dc.language	English
dc.publisher	ELSEVIER SCI LTD
dc.relation.ispartof	Journal of Constructional Steel Research
dc.relation.isbasedon	10.1016/j.jcsr.2015.09.006
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	0905 Civil Engineering, 0915 Interdisciplinary Engineering, 1202 Building
dc.subject.classification	Civil Engineering
dc.title	Strengthening of existing composite steel-concrete beams utilising bolted shear connectors and welded studs
dc.type	Journal Article
utslib.citation.volume	114
utslib.for	0905 Civil Engineering
utslib.for	0915 Interdisciplinary 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
utslib.copyright.status	closed_access	*
dc.date.updated	2023-03-27T21:32:58Z
pubs.publication-status	Published
pubs.volume	114

Abstract:

This paper considers the flexural behaviour of steel-concrete composite beams retrofitted with two types of bolted connectors and welded stud connectors. Three composite beams, one from each connector type, and four non-composite beams were cast together. Three of the non-composite beams were retrofitted using the three connector types respectively. The connectors were installed through holes cored in the concrete slabs of the beams. The holes were backfilled using structural grout. The beams were then tested under static flexural loading. The load-slip behaviour of these connectors under normal and retrofitted conditions was investigated using push-tests. The flexural behaviour of the retrofitted beams was compared with that of the normal composite beams and non-composite beams. The ultimate loads of the test specimens were compared with the design ultimate loads of these beams calculated using Rigid Plastic Analysis (RPA). The vertical deflection of the beams under serviceable load regimes was also compared. The beam experiments were simulated using Finite Element (FE) models developed with ABAQUS. Material models with damage parameters were specified for the concrete and grout used in the test specimens using the Concrete Damage Plasticity (CDP) option. The effects of the concrete and grout strength, grout-hole size and shear connection ratio on the flexural behaviour of retrofitted beams were investigated by carrying out a parametric analysis. The results obtained from full-scale beam and push-test experiments and also the analytical results from RPA and FE analyses are presented and discussed in detail in this paper.

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http://hdl.handle.net/10453/168615