Proceedings of the Korea Concrete Institute Conference (한국콘크리트학회:학술대회논문집)
- 2003.05a
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- Pages.287-292
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- 2003
Experimental Study on Failure Behavior of Plain Concrete - Direct Tension Test
콘크리트 파괴거동특성에 대한 실험적 연구II-직접인장시험
Abstract
The large-scale direct tension tests of plain concrete were performed and then the complete load-CMOD(crack mouth opening displacement) curves with a stable postpeak descending part were presented. Two independently controlled actuators were used to ensure a homogeneous increasing of CMOD in both notches of a specimen and to avoid secondary flexural stresses. It was compared the fracture energies from the test results with them from a classical prediction equation by Bazant and Oh (983), The results are indicated that the fracture energies from these large-scale direct tensile tests are large as 1.5-2 times on average against them from the Bazants prediction equation. But the tensile strength for large-size specimens was about half of the values determined from the splitting tensile strength tests for 10 by 20mm cylindrical specimens due to size effect.
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