期刊论文

中文

建筑结构

1002-848X

2015

45

8

54-58

10.19701/j.jzjg.2015.08.011

湖南省自然科学基金项目(14JJ4062) 湖南省高等学校科学研究项目(重点项目)(12A027)

本校为第一机构

在恒温恒湿环境中对3根素混凝土和3根钢筋混凝土圆柱进行了500余天收缩徐变试验,研究了低强(C30及以下)钢筋混凝土圆柱徐变特性,结合CEB-FIP(1990)模型和中国建科院模型(1986)对实测数据进行了拟合回归分析,计算出不同加载龄期作用下配筋对混凝土徐变的影响系数,并与采用中国建科院模型(1986)中时变函数的Dischinger方法进行了对比。试验结果表明:相同加载龄期的钢筋混凝土柱徐变系数较素混凝土圆柱的偏小,加载龄期对钢筋混凝土后期徐变系数影响较少;国内外徐变预测模型对短期加载龄期(9d)的徐变系数预测精度较高,对长期加载龄期(39d)的徐变系数预测精度较差,特别是对后期徐变系数预测普遍不足,...

Through long-term test of the shrinkage creep for 3 reinforced concrete circular columns and 3 plain concrete circular columns with more than 500 days in the constant temperature and humidity environment,research on creep properties of reinforced concrete columns for low intensity concrete( the cube compressive strength within 28 d is less than or equal C30),the measured data were fitted by regression analyses combined with the models of CEB-FIP( 1990) and China Institute of Building( 1986) to calculate influence coefficient of concrete creep caused by reinforcement in the different loading ag...