A quasibrittle model for the service life prediction of self-compacting concrete structures

Title: A quasibrittle model for the service life prediction of self-compacting concrete structures
Author(s): J. Zheng
Paper category : conference
Book title: SCC'2005-China: 1st International Symposium on Design, Performance and Use of Self-Consolidating Concrete
Editor(s): Zhiwu Yu, Caijun Shi, Kamal Henri Khayat and Youjun Xie
Print-ISBN: 2-912143-61-6
e-ISBN: 2912143624
Publisher: RILEM Publications SARL
Publication year: 2005
Pages: 549 - 556
Total Pages: 8
Nb references: 10
Language: English

Abstract: The time to surface cracking is a significant parameter for the design and assessment of reinforced self-compacting concrete structures located in marine environments. Concrete cracking incurs considerable costs of repairs and inconvenience to the public due to interruptions. This gives rise to the need for accurate prediction of the time to surface cracking in order to achieve cost-effectiveness in maintaining the serviceability of self-compacting concrete structures. It is in this regard that the present paper attempts to develop a quasibrittle mechanics model to predict the service life of chloride contaminated self-compacting concrete structures. Taking into account the softening characteristics of concrete, a partially cracked concrete cover was divided into two parts: elastic isotropic and elastic orthotropic. Based on this cracking model, an analytical solution was derived to the displacement and stress in the cover. The time to surface cracking was determined using the stress condition at the tip of the crack. Finally, the validation of the method was verified by comparing the solution with the experimental results. The effects of the cover depth, steel bar diameter and corrosion rate on the time to surface cracking were discussed.

Online publication: 2005-04-11
Publication type : full_text
Public price (Euros): 0.00
doi: 10.1617/2912143624.059