한국콘크리트학회:학술대회논문집 (Proceedings of the Korea Concrete Institute Conference)
- 한국콘크리트학회 2003년도 봄 학술발표회 논문집
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- Pages.287-292
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- 2003
콘크리트 파괴거동특성에 대한 실험적 연구II-직접인장시험
Experimental Study on Failure Behavior of Plain Concrete - Direct Tension Test
초록
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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