摘要
研究了1种新型的自密实自应力钢管混凝土;提出了通过测试混凝土自由膨胀率来计算钢管核心混凝土的限制膨胀率、自应力和钢管环向应力的方法,并利用复合掺加聚丙烯腈纤维和膨胀剂来控制钢管核心混凝土的早期膨胀和后期收缩;上述措施取得了良好的效果.
In this paper, a method which is used to calculate the confined expansivity and selfstressing of the core concrete and the ringdirection stress in the steel tube by measuring the free expansivity of concrete was proposed. Satisfying effects are obtained by adding the expansive agent and polyacrylonitrile fiber together to control the expansion at the early age and the late shrinkage of the core concrete.
出处
《建筑材料学报》
EI
CAS
CSCD
2003年第4期369-373,共5页
Journal of Building Materials
基金
上海市科技发展基金资助项目(01QE14052)
关键词
钢管混凝土
聚丙烯腈纤维
自由膨胀率
自密实
自应力
环向应力
analytical model
self-compact
self-stressing
concrete filled in steel tube
confined expansivity
polyacrylonitrile fiber
