Measurement of Crack Opening Behavior within ECC Under Bending Moment

Title: Measurement of Crack Opening Behavior within ECC Under Bending Moment
Author(s): Minoru Kunieda, Keitetsu Rokugo
Paper category : conference
Book title: International RILEM Workshop on High Performance Fiber Reinforced Cementitious Composites in Structural Applications
Editor(s): G. Fischer and V. C. Li
Print-ISBN: 2-912143-93-4
e-ISBN: 2912143942
Publisher: RILEM Publications SARL
Publication year: 2006
Pages: 313 - 321
Total Pages: 9
Nb references: 5
Language: English

Abstract: Engineered Cementitious Composites (ECC) exhibit multiple cracking behavior in tensile tests. Especially, the fine cracks in the ECC structural members give an advantage in the use of the materials. However, the crack opening behaviors of the ECC under bending moment (i.e. either multiple cracks or a localized crack) have not been clarified.
This study presents the experimental results on cracking behaviors of both the ECC and ordinary steel fiber reinforced concrete (SFRC) through bending tests of the beams each having the different specimen lengths. And followings are obtained:
1) In the ECC, distributed fine cracks can be observed up to peak load, and then one of those cracks is localized. Those cracking behaviors can be measured by attached Pi-type displacement transducers.
2) The calculated Ecrack shows that a crack consumes constant energy regardless of the difference in specimen length. Ecrack of the ECC was about three times of that of the SFRC. In addition, Evol can be used as an index for number of cracks, in order to compare the crack distribution of the specimens having different specimen length.

Online publication: 2005-05-15
Classification: HPFRCC Design Assumptions
Publication type : full_text
Public price (Euros): 0.00
doi: 10.1617/2912143942.034