# [1]许崇法,曹双寅,范沈龙,等.多因素作用下混凝土中性化深度统一预测模型[J].东南大学学报(自然科学版),2014,44(2):363-368.[doi:10.3969/j.issn.1001-0505.2014.02.024] 　Xu Chongfa,Cao Shuangyin,Fan Shenlong,et al.Unified prediction model of concrete neutral depth under multiple factors[J].Journal of Southeast University (Natural Science Edition),2014,44(2):363-368.[doi:10.3969/j.issn.1001-0505.2014.02.024] 点击复制 多因素作用下混凝土中性化深度统一预测模型() 分享到： var jiathis_config = { data_track_clickback: true };

44

2014年第2期

363-368

2014-03-20

## 文章信息/Info

Title:
Unified prediction model of concrete neutral depth under multiple factors

1东南大学土木工程学院, 南京 210096; 2东南大学交通学院, 南京 210096; 3上海建筑设计研究院有限公司, 上海 200041
Author(s):
1School of Civil Engineering, Southeast University, Nanjing 210096, China
2School of Transportation, Southeast University, Nanjing 210096, China
3Shanghai Architectural Design and Research Institute Co. Ltd., Shang

Keywords:

U446.1
DOI:
10.3969/j.issn.1001-0505.2014.02.024

Abstract:
On the basis of the diffusion theory and laboratory tests, the factors such as carbonization, acid rain, stress and their coupling effects on the neutral depth of the concrete component were studied. Through theoretical research, numerical simulation and regression analysis of experimental data, a concrete neutralization depth unified prediction model was established. The research results show that coupling of carbonization and acid rain exists; acid rain inhibits the carbonization to some extent; the coupling coefficient of acid rain and carbonization is less than 1. No matter acid rain, carbonization or their coupling interaction, the carbonation depth value of concrete increases as erosion time increases. The neutral velocity is fast in the early stages and decreases with the passage of time. The neutral depth is directly proportional with the square root of time. The tensile stress can promote the neutralization of concrete, while the compressive stress inhibits it. The relationship between the stress and concrete carbonation depth value is approximating the linear. Finally, stress factors under different corrosion modes were fitted based on the experimental data.

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