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Abstract
Elematic hollowcore is a machine extruded, precast, prestressed structural member.Prefabrication of these members allows for controlled design parameters, speed of construction,and versatility. However, with the ever-evolving success of these products, it is crucial for designers to have adequate information about their behavior. The objective of this paper is toreport the results of an investigation entailing the observation and quantitative measurements of failure modes of 12-inch elematic hollowcore. A review of relevant literature provided comprehension of the common behavior and failure modes of hollowcore. Seven 12-inch polygon voided hollowcore, supplied by Mid-States Concrete Industries, were tested with a
concentrated load at midspan. Applied loads, moments, and deflections were observed. Results from this research illustrate the comparison between modern codes and produced specimen. The test specimens had similar results to ACI predictions for mode of failure, and cracking, nominal, and maximum probable moments, thus validating the testing procedure and results. Future research with various testing parameters [e.g., span, concrete strength, prestressing configuration] that would result in shear failure would present validity of the shear calculations. Additionally, punching shear should be researched to observe the difference in crack patterns between 8-inch and 12-inch hollowcore.