Effects of Prestressed On the Headed Shear Stud Connectors for Composite Steel-Concrete Beams

Speaker: Olivia Mirza

Affiliation: University of Western Sydney

Time: Monday 10/03/2014 from 14:00 to 15:00

Venue: Access Grid UWS. Presented from Penrith (Y239), accessible from Parramatta (EB.1.32) and Campbelltown (26.1.50).

Abstract: Steel-concrete composite beams are formed by connecting concrete sections to a steel beam through the use of headed shear stud connectors. The combined compressive strength and tensile strength within the concrete and steel respectively are seen to be advantageous and are becoming increasingly popular within the construction industry for building modern day structures such as multi-storey high rise buildings and bridges. The strength of the composite connection is dictated by the strength and ductility of the headed shear stud connector. Failure of the shear connection significantly reduces the ultimate load capacity of structures. The incorporation of prestressed in the composite steel-concrete structures could potentially increase the strength of composite connections. This research consists of analysing the effect of prestressed on the headed shear stud connectors for composite steel-concrete beams. The finite element analysis software, ABAQUS was used to determine the effectstressbar diameter and concrete strength have on the headed shear stud connector strength. The outcome of the numerical analysis is seen to be very positive in providing a means of improving ultimate load capacities of steel-concrete composite beams. The results of the analyses undertaken and design graphs were developed for the inclusion of prestressed in composite structures will contribute further to the continuing evolution of construction techniques incorporating steel-concrete composite structures.

Biography: Olivia Mirza is a lecturer in School of Computing Engineering and Mathematics. She is also Academic Course Advisor for Postgraduate Fire Safety Engineering and Building Surveying Program. Dr Mirza's PhD research is mostly concentrated on the behaviour and design of shear connectors on composite steel and concrete structures. The issues emphasised in her research are looking at the effects of steel fibres as a strengthening system in composite steel-concrete beams, the effects of elevated temperatures on the behaviour of headed stud shear connectors for composite steel-concrete beams, the long term effects on the behaviour of the composite steel-concrete beams, the effects of strain regimes on the behaviour of the composite steel-concrete beams, the effects of the combination of axial tension and shear loading on the behaviour of composite steel-concrete beams. Furthermore, Olivia is also interested in looking at the flush end plate for beam-column connection using blind bolt under both static and seismic loading. She is also interested in looking at the use of innovative anchors for the achievement of composite action for rehabilitating existing and deployment in deconstructible and sustainability of composite steel-concrete structures. In order to advance her research and contribute to engineering community, Olivia also working closely with industry partners (AJAX Fastener, One Steel, Bluescope and VSL prestressed) and government department (RMS formerly known as RTA and RailCorp).