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Fracture behavior of concrete under high rates of loading

✍ Scribed by Byung Hwan Oh

Publisher
Elsevier Science
Year
1990
Tongue
English
Weight
525 KB
Volume
35
Category
Article
ISSN
0013-7944

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✦ Synopsis

Fracture properties and fracture behavior of concrete under dynamic loadings are investigated. Several series of concrete beams were tested under various rates of loadings. The relative initial notch depths of test beams were varied from zero to 0.75. The loaddeflection curves and the corresponding fracture energies are determined for various cases. The variation of fracture energy with notch depth is established. The fracture energy of concrete is found to increase with an increase of loading rate. A rate-dependent expression to predict the dynamic fracture energy of concrete is proposed. The nominal failure stresses for various notched beams are also studied and found to depend on the rates of loading. The increase of nominal failure stress due to dynamic Ioading is fo~ulated.

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