Deflection-based failure probability analysis of low shrinkage-creep concrete structures in presence of non-stationary evolution of shrinkage and creep uncertainties

被引：23

作者：

Yang, Yiming ^{[1
,2
,3
,4
]}

Liu, Zhanghong ^{[5
]}

Tang, Huang ^{[1
]}

Peng, Jianxin ^{[2
]}

机构：

[1] Hunan City Univ, Sch Civil Engn, Yiyang 413000, Hunan, Peoples R China

[2] Minist Educ, Key Lab Safety Control Bridge Engn, Changsha 410114, Hunan, Peoples R China

[3] State Key Lab Performance Monitoring & Protecting, Nanchang 330096, Jiangxi, Peoples R China

[4] Hunan Engn Res Ctr Dev & Applicat Ceramsite Concre, Yiyang 413000, Hunan, Peoples R China

[5] Jiangxi Ganyue Expressway Co Ltd, Nanchang 330096, Jiangxi, Peoples R China

来源：

CONSTRUCTION AND BUILDING MATERIALS | 2023年 / 376卷

基金：

中国国家自然科学基金;

关键词：

Low shrinkage -creep concrete; Failure probability; Long-term deflection; Uncertainty; Non -stationary evolution; LONG-TERM DEFLECTION; DRYING SHRINKAGE; MODEL;

D O I：

10.1016/j.conbuildmat.2023.131077

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

Reasonable assessment of the failure probability caused by long-term deflection is essential to ensure the service performance of low shrinkage-creep concrete (LSCC) structures. In this paper, the shrinkage and creep models applicable to LSCC are proposed and verified by comparing their results with the experimental data. Then, the non-stationary evolution models of uncertainties of concrete creep and shrinkage are developed. Finally, a long-term deflection-based assessment method of failure probability of LSCC structures is also proposed considering the effect of non-stationary evolution of creep and shrinkage uncertainties. The case analysis results show that ignoring the effect of the non-stationary evolution of creep and shrinkage uncertainties overestimates the long-term deflection, and the deviation in this case study is 10.13%. Compared with the uncertainty of creep, the cumulative failure probability of the case structure is more sensitive to the non-stationary evolution of shrinkage uncertainty. The use of LSCC can greatly reduce the cumulative failure probability of concrete structures caused by excessive long-term deflection. Additionally, the cumulative failure probability of concrete structures is greatly underestimated by using the traditional characteristic parameters of uncertainties of concrete creep and shrinkage.

引用

页数：10