摘要
采用三点弯曲试验,研究不同强度等级的模袋布加固混凝土梁和素混凝土梁的弯曲韧性,分析了模袋布对混凝土梁弯曲韧性的影响。研究结果表明,模袋布能约束混凝土梁的变形,阻止微裂缝的扩展,降低混凝土的脆性。模袋布加固梁相比素混凝土梁,吸收能量值和等效弯曲强度有18%左右的提高,很好地提高了混凝土梁的弯曲韧性,改善了混凝土梁的抗裂性,弯曲韧性与混凝土强度等级呈现波动的曲线关系。
Three point bending test was carried out to study the flexural toughness of mould bags reinforced concrete beam and plain concrete beam with different strength grades. The test results show that the mould bag fabric confine the deformation of the concrete beam, prevent the micro cracks from extending, and reduce the brittleness of concrete beam. The absorption energy value and equivalent bending strength of the mould bag reinforced beam was enhanced by 18% compared with plain concrete beam. The mould bag fabric can obviously improve flexural toughness of the concrete beams and, improve the crack resistance of concrete beams. But the bending toughness of concrete beams and the strength grade of the concrete show a wave curve relation.
作者
丁亚楠
娄宗科
DING Yanan;LOU Zongke(School of Water Conservancy and Architecture Engineering, Northwest Agricultural Scienceand Technology University, Yangling 712100, China)
出处
《材料科学与工程学报》
CAS
CSCD
北大核心
2019年第4期651-657,共7页
Journal of Materials Science and Engineering
基金
“十三五”国家重点研发计划资助项目(2016YFC0400203)
关键词
三点弯曲试验
素混凝土梁
模袋混凝土梁
强度等级
弯曲韧性
three-point bending test
plain concrete beam
mould bag concrete beam
strength grade
bending toughness
