Time dependent behaviour of fibre pull-out in self-compacting concrete

被引：16
|
作者：
Abrishambaf, Amin [1 ]
Barros, Joaquim A. O. [1 ]
Cunha, Vitor M. C. F. [1 ]
Frazao, Cristina [1 ]
机构：
[1] Univ Minho, ISISE, Dept Civil Engn, Sch Engn, Campus Azurem, P-4800058 Guimaraes, Portugal
来源：
CEMENT & CONCRETE COMPOSITES | 2017年 / 77卷
关键词：
Time-dependent behaviour; Long-term load; Creep; Fibre pull-out; Bond; Steel fibre reinforced self-compacting concrete; REINFORCED CONCRETE; STEEL FIBERS; PANELS; CREEP; MODEL;
D O I：
10.1016/j.cemconcomp.2016.12.004
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
In the present study, the effectiveness of fibres in transferring stress across cracks under a sustained load was assessed. Single fibre pull-out creep tests were performed, in which fibre slip was monitored as a function of the time. The influence of the fibre orientation angle (0, 30 and 60), as well as pre-imposed fibre slip levels, s(pr), 0.3 and 0.5 mm on the creep response was investigated. Additionally, instantaneous fibre pull-out tests were carried out on undamaged-bond specimens in order to quantify the effects of the pull-out creep behaviour. The damage introduced by the pre-slip levels in the bond of the fibre/matrix interface influenced the long-term fibre pull-out behaviour and, consequently, accelerated the creep rate. However, the assembled pull-out creep behaviour did not differ considerably from the instantaneous pull-out behaviour for the adopted pre-imposed fibre slip levels. (C) 2016 Elsevier Ltd. All rights reserved.
引用
收藏
页码：14 / 28
页数：15
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