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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 저널정보
- 국제구조공학회 Structural Engineering and Mechanics, An Int'l Journal Structural Engineering and Mechanics, An Int'l Journal Vol.74 No.3
- 발행연도
- 2020.1
- 수록면
- 351 - 363 (13page)
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초록· 키워드
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Based on the dynamic tests of recycled aggregate concrete (RAC) short columns confined by the hoop reinforcement, the dynamic failure mechanism and the mechanical parameters related to the constitutive relation of confined recycled aggregate concrete (CRAC) were investigated thoroughly. The fracturing sections were relatively flat and smooth at higher strain rates rather than those at a quasi-static strain rate. With the increasing stirrup volume ratio, the crack mode is transited from splitting crack to slipping crack constrained with large transverse confinement. The compressive peak stress, peak strain, and ultimate strain increase with the increase of stirrup volume ratio, as well as the increasing strain rate. The dynamic confining increase factors of the compressive peak stress, peak strain, and ultimate strain increase by about 33%, 39%, and 103% when the volume ratio of hoop reinforcement is increased from 0 to 2%, but decrease by about 3.7%, 4.2%, and 9.1% when the stirrup spacing is increased from 20mm to 60mm, respectively. This sentence is rephrased as follows: When the stirrup volume ratios are up to 0.675%, and 2%, the contributions of the hoop confinement effect to the dynamic confining increase factors of the compressive peak strain and the compressive peak stress are greater than those of the strain rate effect, respectively. The dynamic confining increase factor (DCIF) models of the compressive peak stress, peak strain, and ultimate strain of CRAC are proposed in the paper. Through the confinement of the hoop reinforcement, the ductility of RAC, which is generally slightly lower than that of NAC, is significantly improved.
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참고문헌 (29)
참고문헌 신청
2002 / Removal and Reuse of Hardened Concrete / ACI Mater J :300~325
Bischoff, P. H. / 1991 / Compressive behavior of concrete at high strain rates / Mater. Struct 24(6):425~450
Chen, G. M. / 2018 / Compressive behavior of CFRP-confined recycled aggregate concrete in different-sized circular sections / J. Compos. Construct 22(4):1~12
Zongping Chen / 2014 / Performance and Calculations of Recycled Aggregate Concrete-filled Steel Tubular (RACFST) Short Columns under Axial Compression / International Journal of STEEL STRUCTURES 14(1):31~42
Du, T. / 2010 / The Complete Stress-strain Curve of Recycled Aggregate Concrete under Uniaxial Compression Loading / Journal of Wuhan University of Technology-Materials Science Edition 25(5):862~865
Bischoff, P. H. / 1991 / Compressive behavior of concrete at high strain rates / Mater. Struct 24(6):425~450
Chen, G. M. / 2018 / Compressive behavior of CFRP-confined recycled aggregate concrete in different-sized circular sections / J. Compos. Construct 22(4):1~12
Zongping Chen / 2014 / Performance and Calculations of Recycled Aggregate Concrete-filled Steel Tubular (RACFST) Short Columns under Axial Compression / International Journal of STEEL STRUCTURES 14(1):31~42
Du, T. / 2010 / The Complete Stress-strain Curve of Recycled Aggregate Concrete under Uniaxial Compression Loading / Journal of Wuhan University of Technology-Materials Science Edition 25(5):862~865
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