Abstract
Experimental studies into the biaxial strength of concrete are reviewed
and technical difficulties encountered in the development of a suitable
test setup are discusssed. A new testing apparatus is described which
allows testing of concrete specimens under various biaxial stress
states. Results of an investigation for which this equipment was
used are r e orted. The test data indicate that the strength of concrete
under biaxial compression, 01 = 02, is only 16 percent larger than
under uniaxia I compression. Tests in the region of combined compression
and tension confirmed previously obtained data. The biaxial tensile
strength of concrete is approximately equal to its uniaxial tensile
strength
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