配筋混凝土干燥收缩变形的试验研究  

An Experimental Study on Shrinkage Strain of Reinforced Concrete

作　　者：陈萌[1] 张兴昌[2] 孟会英[1] 

机构地区：[1]郑州大学土木工程学院,郑州450002 [2]平原大学,河南新乡453003

出　　处：《建筑科学》2007年第9期55-57,47,共4页Building Science

基　　金：河南省高等学校青年骨干教师项目资助

摘　　要：从宏观的应用角度出发,结合工程对配筋混凝土的干缩变形进行了深入的试验和理论分析。对40个配筋混凝土构件的约束干燥收缩变形从数据采集到试验结果进行了为期360天龄期的分析研究,在混凝土自由干燥收缩估算公式的基础上,考虑了钢筋及混凝土徐变综合的影响,提出了配筋混凝土干燥收缩应变多系数估算公式,公式的计算结果与186组试验数据符合良好。公式的提出是对以往收缩公式的改进和发展,并具有较好的工程适用性,为今后修订《混凝土结构设计规范》(GB50010-2002)中有关耐久性的条目提供了重要的试验数据和背景材料。From the macroscopic view, the shrinkage strain of reinforced concrete members is deeply analyzed, and the restraint drying shrinkage strains of 40 reinforced concrete specimens are measured. Based on the multi-coefficient free drying shrinkage formula, the comprehensive coefficient of steel and creep is considered, then the multl-coefficient drying shrinkage formula for reinforced concrete is achieved. The strains estimated from the new drying shrinkage formula agree well with the 186 experimental strains. The formula presented in the paper has an important engineering significance, and can provide the experimental strains and background materials for the revision of Code for Design of Concrete Structures.

关 键 词：混凝土 收缩 变形 

分 类 号：TU375[建筑科学—结构工程] TU528.571