2015 CSCE Annual Conference Regina - Building on our Growth Opportunities

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

Pilot Study of Blast Performance of Reinforced Concrete Reservoir Walls

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Dr. Dan Palermo, York University (Presenter)
Mr. Jin Fan, University of Ottawa
Dr. IOAN NISTOR, University of Ottawa

Reinforced concrete reservoir tanks are commonly used for water and wastewater storage and treatment. Given their function and importance to society, intentional or accidental blast loading of such structures could pose serious implications.   

This paper presents experimental results of two scaled reservoir walls based on a prototype reservoir tank with the capacity to retain 10,000 m3 of water. The reservoir tank walls were scaled to match the geometric limitations and loading capacity of the shock tube housed in the Structures Laboratory at the University of Ottawa.

The reservoir walls were designed and analyzed following the design method prescribed in Circular Concrete Tanks without Prestressing, published by the Portland Cement Association (PCA). The PCA method is based on the American Concrete Institute (ACI) 350 specifications, but with some differences in the design provisions. In this study, the simplified analysis was verified with an elastic analysis using SAP2000.

The experimental program was conducted with a shock tube that has the capability to impose short duration loads with characteristics similar to those of live explosives. The reservoir walls were subjected to incrementally increasing blast pressures to cover both elastic and inelastic response.

The results presented in this paper includes a discussion of the reflected pressures and impulses imposed on the walls; while the performance will be presented through displacement- and reinforcement strain-time histories, cracking patters, and failure modes.