PROBABILISTIC MICROMECHANICAL MODEL OF ENGINEERED CEMENTITIOUS COMPOSITES (ECC)

Author(s): J. Li and E.-H. Yang
Book Title: Seventh International RILEM Conference on High Performance Fiber Reinforced Cement Composites (HPFRCC7)
Editor: H.W. Reinhardt, G.J. Parra-Montesinos, H. Garrecht
ISBN: 978-2-35158-145-2
e-ISBN: 978-2-35158-146-9
Publisher: RILEM Publications SARL
Publication year: 2015
Pages: 111-118
Total Pages: 8
Language: English

Abstract: Two failure criteria of Engineered Cementitious Composites (ECC) with high strain hardening capacity were introduced based on micromechanics, which provides guidelines for tailoring the material. Since the nature of heterogeneity of the cementitious composite affects the possibility of failure of the ultimate strain hardening behavior, it is a necessity to perform the reliability assessment for the material. In this paper, a simplified procedure is proposed for evaluating the probability of strain hardening behavior of ECC for preliminary design applications. To overcome the complexity of the failure criteria, a nonparametric regression algorithm known as multivariate adaptive regression splines (MARS) has been used to relate the criteria index to various micromechanical parameters in terms of fiber, matrix and interface. Probabilistic assessments on the strain hardening behavior of ECC were carried out using the First-order reliability method (FORM) based on the built MARS model.

Online publication: 2015
Publication Type: full_text
Public price (Euros): 0.00