Tension/Extension Test Device for Ultra High Stren

There is an expressed need within the U.S. Government to develop and enhance analytic modeling capabilities with respect to predicting the response of reinforced concrete (RC) structures subjected to dynamic loadings events, especially those generated by weapon effects. Performing laboratory tests—where a set of representative stress and strain-controlled loadings is applied to concrete specimens—are a key step in characterizing concrete behaviors invoked by these scenarios, which are needed to support analytic modeling efforts. Such lab tests represent a proven and reliable tool to measure the strength and rheology of the concrete. The data can be used to understand the important mechanical phenomena from which to develop and calibrate constitutive models for use in physics-based models. The opportunity exists to apply state-of-the-art technologies to design a test system capable of performing direct tension/triaxial extension tests on UHSC samples. Our proposal seeks to combine technologies from a variety of specialized fields and experiences to accomplish this goal. Specifically, the K&C team proposes to combine novel applications of state-of-the-art instrumentation devices; computer-controlled, servo-hydraulic test systems; design optimization and design of experiments (DOE) techniques; and high-fidelity physics-based (HFPB) analytic modeling to design the test system.