期刊论文

Cao, G.

中文

中国铁道科学

1001-4632

2013

34

6

73-78

10.3969/j.issn.1001-4632.2013.06.12

湖南省高等学校科学研究重点项目（12A027）；

本校为第一且通讯机构

通过对混凝土圆柱试件收缩应变的长期测试发现,试件的体内收缩应变普遍小于体外收缩应变,而且收缩应变在前期增长较快,后期收缩应变率逐步减小,最后曲线趋于平缓;20d龄期的体内、外收缩应变分别占最大收缩应变的10.8%和13.3%,100d龄期的体内、外收缩应变分别占最大收缩应变的36.5%和37.7%,1年龄期的体内、外收缩应变分别占最大收缩应变的83.2%和80.9%。在用B3变异系数和B3方差对国内外的收缩应变预测模型进行对比研究的基础上,提出新的混凝土收缩应变预测模型。该预测模型综合了GZ(1993)模型的对数函数计算理论和GL2000模型的双曲线幂函数计算理论,并参考了中国建科院模型的相关参数,因此该模型...

Through long-term tests for the shrinkage strain of concrete circular column specimens, we've found that internal shrinkage strain is generally less than external shrinkage strain. Furthermore, the shrinkage strains grow rapidly in earlier stage and gradually reduce in later stage, and the curve tends to be flat at last. The internal and external shrinkage strains take up 10.8% and 13.3% of the maximum shrinkage strain respectively in 20 days, 36.5% and 37.7% respectively in 100 days, 83.2% and 80.9% respectively in a year. Based on the contrastive study of international and domestic predictio...