Browse > Article
http://dx.doi.org/10.4334/JKCI.2009.21.5.541

Tensile Deformation Characteristics of ECC Predicted with a Modified Fiber Bridging Curve  

Kim, Jeong-Su (Dept. of Civil and Environmental Engineering, Korea Advanced Institute of Science and Technology)
Lee, Bang-Yeon (Dept. of Civil and Environmental Engineering, Korea Advanced Institute of Science and Technology)
Kim, Jin-Keun (Dept. of Civil and Environmental Engineering, Korea Advanced Institute of Science and Technology)
Kim, Yun-Yong (Dept. of Civil Engineering, Chungnam National University)
Publication Information
Journal of the Korea Concrete Institute / v.21, no.5, 2009 , pp. 541-548 More about this Journal
Abstract
A theoretical prediction model of fiber bridging curve was established based on the assumption that fibers are uniformly distributed on the crack surface. However, the distance between fibers and their orientation with respect to crack surface can greatly affect the prediction of fiber bridging curve. Since, the shape of fiber bridging curve is a critical factor for predicting the tensile stress-strain relationship of ECC, it is expected that the assumption of uniform distribution of fiber may cause a significant error when predicting the tensile behavior of ECC. To overcome this shortcoming, a new prediction method of stress-strain relation of ECC is proposed based on the modified fiber bridging curve. Only effective fibers are taken into account considering the effects of their orientation and distance between them. Moreover, the approach for formulating the tensile stress-strain relation is discussed, where a procedure is presented for obtaining important parameters, such as the first crack strength, the peak stress, the displacement at peak stress, tensile strain capacity, and the crack spacing. Subsequent uniaxial tensile tests were performed to validate the proposed method. It was found that the predicted stress-strain relations obtained based on the proposed modified fiber bridging curve exhibited a good agreement with experimental results.
Keywords
ECC; tensile stress-strain; fiber bridging curve; fiber orientation; distance between fibers;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
연도 인용수 순위
1 Li, V. C. and Wu, H. C., "Conditions for Pseudo Strainhardening in Fiber Reinforced Brittle Matrix Composites," Journal Applied Mechanics Review, Vol. 45, No. 8, 1992, pp. 390-398   DOI
2 Kanda, T. and Li, V. C., "Practical Design Criteria for Saturated Pseudo Strain Hardening Behavior in ECC," Journal of Advanced Concrete Technology, Vol. 4, No. 1, 2006, pp. 59-72   DOI
3 Z. Lin, Kanda, T., and Li, V. C., "On Interface Property Characterization and Performance of Fiber Reinforced Cementitious Composites," Journal of Concrete Science and Engineering, RlLEM, Vol. 1, 1999, pp. 173-184
4 Li, V. C. and Leung, C. K. Y., "Steady State and Multiple Cracking of Short Random Fiber Composites," ASCE Journal of Engineering Mechanics, Vol. 188, No. 11, 1992, pp. 2246-2264   DOI
5 Marshall, D. B. and Cox, B. N., "A J-integral Method for Calculating Steady-state Matrix Cracking Stresses in Composites," Mechanics of Materials, Vol. 7, No. 2, 1988, pp. 127-133   DOI   ScienceOn
6 Kanda, T. and Li, V. C., "Multiple Cracking Sequence and Saturation in Fiber Reinforced Cementitious Composites," Concrete Research and Technology JCI, Vol. 9, No. 2, 1998, pp. 19-33   DOI
7 김윤용, 이방연, 김진근, "PVA-ECC 단면 이미지의 섬유 분류 및 검출 기법," 콘크리트학회 논문집, 20권, 4호, 2008, pp. 601-608   과학기술학회마을   DOI
8 김윤용, 김정수, 김희신, 하기주, 김진근, "마이크로역학에 의하여 설계된 ECC(Engineered Cementitious Composite)의 역학적 특성," 콘크리트학회 논문집, 17권, 5호, 2005, pp. 709-716   과학기술학회마을   DOI
9 Kanda, T. and Li, V. C., "Interface Property and Apparent Strength of a High Strength Hydrophilic Fiber in Cement Matrix," ASCE Journal of Materials in Civil Engineering, Vol. 10, No. 1, 1998, pp. 5-13   DOI   ScienceOn
10 Kim, J. K., Kim, J. S., Ha, G. J., and Kim, Y. Y., "Tensile and Fiber Dispersion Performance of ECC Produced with Slag Particles," Cement and Concrete Research, Vol. 37, No. 7, 2007, pp. 1096-1105   DOI   ScienceOn
11 Wu, H. C. and Li, V. C., "Snubbing and Bundling Effects on Multiple Crack Spacing of Discontinuous Randon Fiber-Reinforced Brittle Matrix Composites," Journal of American Ceramic Society, Vol. 75, No. 12, 1992, pp. 3487-3479   DOI
12 Li, V. C. and Obla, K., "Effect of Fiber Diameter Variation on Properties of Cement Based Matrix Fiber Reinforced Composites," Composites Engineering International Journal Part B 27B, 1996, pp. 275-284   DOI   ScienceOn
13 Fischer, G. and Li, V. C., "Effect of Matrix Ductility on Deformation Behavior of Steel Reinforced ECC Flexural Members under Reversed Cyclic Loading Conditions," ACI Structural Journal, Vo1. 99, No. 6, 2002, pp. 781-790