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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 저널정보
- 한국계산역학회 Computers and Concrete, An International Journal Computers and Concrete, An International Journal Vol.21 No.6
- 발행연도
- 2018.1
- 수록면
- 607 - 622 (16page)
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초록· 키워드
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A non-linear finite element model (FEM) was constructed using a three-dimensional software (ATENA-3D) to investigate the effect of strengthening on the behavior of prestressed hollow-core (PHC) slabs with or without openings. The slabs were strengthened using near surface mounted (NSM)-carbon fiber reinforced polymer (CFRP) strips. The constructed model was validated against experimental results that were previously reported by the authors. The validated FEM was then used to conduct an extensive parametric study to examine the influence of prestressing reinforcement ratio, compressive strength of concrete and strengthening reinforcement ratio on the behavior of such slabs. The FEM results showed good agreement with the experimental results where it captured the cracking, yielding, and ultimate loads as well as the mid-span deflection with a reasonable accuracy. Also, an overall enhancement in the structural performance of these slabs was achieved with an increase in prestressing reinforcement ratio, compressive strength of concrete, external reinforcement ratio. The presence of openings with different dimensions along the flexural or shear spans reduced significantly the capacity of the PHC slabs. However, strengthening these slabs with 2 and 4 (64 and 128 mm2 that represent reinforcement ratios of 0.046 and 0.092%) CFRP strips was successful in restoring the original strength of the slab and enhancing post-cracking stiffness and load carrying capacity.
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참고문헌 (23)
참고문헌 신청
Al-Saadi, N.T.K. / 2016 / Modelling of NSM CFRP strips embedded in concrete using lap shear tests with epoxy adhesive / J. Compos. Struct. 153:662~672
Al-Saadi, N.T.K. / 2016 / Modelling of near-surface mounted carbon fibre reinforced polymer strips embedded in concrete with cement-based adhesive / Constr. Build. Mater. 127:383~393
Barros, J.A.O. / 2007 / Efficacy of CFRP-based techniques for the flexural and shear strengthening of concrete beams / Cement Concrete Compos. 29(3):203~217
Bigaj, A. / 1999 / Structural dependence of rotation capacity of plastic hinges
Cervenka, V. / 2016 / ATENA Program Documentation Part 1: Theory / Cervenka Consulting Ltd.
Al-Saadi, N.T.K. / 2016 / Modelling of near-surface mounted carbon fibre reinforced polymer strips embedded in concrete with cement-based adhesive / Constr. Build. Mater. 127:383~393
Barros, J.A.O. / 2007 / Efficacy of CFRP-based techniques for the flexural and shear strengthening of concrete beams / Cement Concrete Compos. 29(3):203~217
Bigaj, A. / 1999 / Structural dependence of rotation capacity of plastic hinges
Cervenka, V. / 2016 / ATENA Program Documentation Part 1: Theory / Cervenka Consulting Ltd.
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