Fracture Behaviors of Dam and Wet-Sreening Concrete by Direct Tensile Test

Abstract:

The emphasis of this paper is to experimentally study the fracture behaviors of dam and wet-screening concrete such as softening curve, uniaxial tensile strength , maximum crack width and fracture energy . The direct tension tests were performed on prismatic specimens with no initial notch include dam concrete specimens which size is 250mm×250mm×500mm and wet-screening concrete specimens which size is 150mm×150mm×300mm by employing a servo-hydraulic closed-loop testing machine with large stiffness. The uniaxial tensile load-strain curves, uniaxial tensile stress-strain curves, uniaxial tensile stress-deformation curves were acquired. On the basis of principle of fracture mechanics of concrete, the stress-crack width curves and the relative stress-relative crack width curves were obtained. Finally, the expressions of softening curves and fracture parameters such as , and of dam and wet-screening concrete were achieved. The relationships of the foregoing fracture parameters between dam concrete and wet-screening concrete were discussed in this paper. The achieved softening curves and fracture parameters can provide input data for the fracture simulating analysis of dam and wet-screening concrete.

• Periodical: Key Engineering Materials (Volumes 400-402)
• Pages: 233-238
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.400-402.233
• Online since: October 2008
• Authors: Zhi Fang Zhao, Bo Pang, Zhi Gang Zhao
• Keywords: Dam Concrete, Direct Tensile Test, Fracture Behaviour, Wet-Screening Concrete

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