2015 CSCE Annual Conference Regina - Building on our Growth Opportunities

2015 CSCE Annual Conference Regina - Building on our Growth Opportunities Conference

Shear Behaviour of Z-Shape Steel Plate Connectors Used in Concrete Sandwich Wall Panels

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Mr. Nabi Goudarzi, University of Alberta (Presenter)
Mr. Yasser Korany, University of Alberta
Dr. Samer Adeeb, University of Alberta
Dr. Roger Cheng, University of Alberta

Concrete Sandwich Wall Panels (CSWP) consist of two concrete layers with thermal insulation in between and provide thermal and acoustic insulation and protect the building from moisture ingress. These prefabricated CSWP are widely used in North America to enclose buildings and are subject to high out-of-plane wind and seismic loads. Under out-of-plane loading, CSWP may behave as non-composite, semi-composite or fully-composite panels. The degree of this out-of-plane flexural composite action depends significantly on the shear behaviour of the mechanical connectors between the concrete layers. A concrete sandwich wall panel with higher degree of composite action has substantially higher out-of-plane flexural resistance. Hence, the shear response of interlayer mechanical connectors should be optimized to maximize the out-of-plane composite action of CSWP.      

Due to their high efficiency in mobilizing out-of-plane flexural composite action, Z-Shape Steel Plate Connectors (Z-SPC) have recently been used as interlayer mechanical connectors in CSWP. This paper reports the experimental results of a total of 6 push-out shear tests on Z-SPC with various thicknesses and widths. Finite element models for the test specimens were created using Abaqus and validated against the experimental results. Both the physical and numerical models were used to investigate the effect of the width and thickness of Z-SPC on their shear strength and stiffness.

The effect of cracking of concrete at the connector-concrete interface was also investigated. The findings of this investigation will be used to optimize the design of Z-SPC and accurately predict the out-of-plane flexural behaviour of CSWP constructed using Z-SPC.