[1] Yan YuanXu Yun, Wang XunPan Jinlong,. Flexural behaviors of double-reinforced ECC beams [J]. Journal of Southeast University (English Edition), 2013, 29 (1): 66-72. [doi:10.3969/j.issn.1003-7985.2013.01.014]

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Flexural behaviors of double-reinforced ECC beams()

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Journal of Southeast University (English Edition)[ISSN:1003-7985/CN:32-1325/N]

Volumn:

29

Issue:

2013 1

Page:

66-72

Research Field:

Civil Engineering

Publishing date:

2013-03-20

Info

Title:

Flexural behaviors of double-reinforced ECC beams

Author(s):

Yan YuanXu Yun;  Wang XunPan Jinlong

Key Laboratory of Concrete and Pre-Stressed Concrete Structures of Ministry of Education, Southeast University, Nanjing 210096, China

Keywords:

engineered cementitious composites(ECC);  ultimate carrying capacity;  ultimate curvature;  ductility;  parametric study

PACS:

TU354

DOI:

10.3969/j.issn.1003-7985.2013.01.014

Abstract:

In order to investigate the flexural behaviors of engineered cementitious composites(ECC), theoretical and experimental researches are done on flexural double-reinforced ECC beams. Based on the assumption of the plane section remaining plane in bending and simplified constitutive models of materials, the calculation methods of load carrying capacities for different critical stages are obtained. Then, these calculation methods are demonstrated by comparing the test results with the calculation results. Finally, based on the proposed theoretical formulae, the effects of the compression strength, compression strain and tension strength of ECC, and the reinforcement ratio on the flexural behaviors of double-reinforced ECC beams are analyzed. The calculated and measured results are in good agreement, which indicates that the theoretical model can be used to predict the moment-curvature response of steel reinforced ECC beams. And the results of parametric studies show that the increase in the compression strength of ECC can greatly improve the flexural performance of beams; the increase in the ultimate compression strain can significantly improve the ultimate curvature and ductility, but has little effect on the load bearing capacity of beams. The tensile strength of ECC has little effect on the flexural behaviors of ECC beams. The increase in the steel reinforcement ratio can lead to significant improvement of the load bearing capacity and the stiffness of beams, but a degradation of the ductility of beams. The theoretical model and parameter analysis results in this paper are instructive for the design of steel reinforced ECC beams.

References:

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Memo

Memo:

Biographies: Yan Yuan(1989—), female, undergraduate; Pan Jinlong(corresponding author), male, doctor, professor, jinlongp@gmail.com.
Foundation items: The National Natural Science Foundation of China(No.51278118), Program for Special Talents in Six Fields of Jiangsu Province(No.2011JZ010), the Natural Science Foundation of Jiangsu(No.BK2012756), the National Undergraduate Innovative Experiment Program(No.111028660).
Citation: Yan Yuan, Xu Yun, Wang Xun, et al. Flexural behaviors of double-reinforced ECC beams[J].Journal of Southeast University(English Edition), 2013, 29(1):66-72.[doi:10.3969/j.issn.1003-7985.2013.01.014]

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