摘要
在试验基础上 ,根据限制条件下自应力混凝土的变形相容和平衡条件 ,参照自由变形膨胀混凝土的变形曲线 ,给出了自应力值和有效自由变形的增量关系 ;建立了可考虑膨胀和徐变时间过程、可适应各种边界条件和配筋形式的配筋混凝土自应力发展过程的有限元分析模型 .对若干配筋自应力混凝土试件的有限元数值计算表明 。
Based on experiments, a theoretical model for calculating the self stress of reinforced self stressing concrete is proposed. The efficient expansive coefficient is put forward to show how the ratio of efficient free expansion to free expansion increments changes with the steel ratio and concrete age. An analysis model by finite element method is deduced. This model includes the expansion deformation and creep deformation and their changes with concrete age. It can be used to analyze the expanding process of reinforced self stressing concrete structures with any reinforcement type and boundary conditions.
出处
《大连理工大学学报》
CAS
CSCD
北大核心
2001年第5期607-611,共5页
Journal of Dalian University of Technology
基金
国家自然科学基金资助项目 ( 5 98790 0 1)
