[1]杨启斌.改进的新老混凝土粘结约束收缩计算模型研究[J].福建工程学院学报,2015,13(01):22-27.[doi:10.3969/j.issn.1672-4348.2015.01.004]
　Yang Qibin.Improved restrained shrinkage calculation model for adhesive concrete[J].Journal of FuJian University of Technology,2015,13(01):22-27.[doi:10.3969/j.issn.1672-4348.2015.01.004]
点击复制

改进的新老混凝土粘结约束收缩计算模型研究()
分享到：

福建工程学院学报[ISSN:2097-3853/CN:35-1351/Z]

卷:
第13卷
期数:
2015年01期
页码:
22-27
栏目:
出版日期:
2015-02-25

文章信息/Info

Title:
Improved restrained shrinkage calculation model for adhesive concrete
作者:
杨启斌
福建工程学院管理学院
Author(s):
Yang Qibin
School of Management, Fujian University of Technology
关键词:
约束收缩;  新老混凝土粘结;  收缩应力;  自密实混凝土;  计算模型
Keywords:
restrained shrinkage;  adhesion between young and old concrete;  restrained stress;  selfcompacting concrete;  calculation model
分类号:
TU528
DOI:
10.3969/j.issn.1672-4348.2015.01.004
文献标志码:
A
摘要:
引入增量法，提出了改进的新老混凝土粘结约束收缩力学模型。根据相关的实验结果论证该约束收缩力学模型的有效性。最后利用改进的模型对新浇筑自密实混凝土截面上的应力分布情况以及粘结面上的约束剪力进行计算，并对结果进行分析。分析表明，自密实混凝土比普通混凝土因收缩而产生的应力更大，尤其在早龄期；收缩应力不仅会在很大程度上受到自由收缩的影响，而且与混凝土的基本物理力学性能有关。
Abstract:
Incremental method was employed to establish a mechnical restrained model for patched concrete. The simulation results confirm the effectiveness of the mechanical restrained shrinkage model. The stress distribution of the concrete and the restrained shear were calculated and analysed with the improved model. The results show that the shrinkage stress of the selfecompacting concrete is higher than that of the ordinary concrete especially in the early age, that the shrinkage stress is not only affected by the free shrinkage but is relative to the basic mechanical properties of the concrete.

参考文献/References:

[1] Bazant Z P, Baweja S. Justification and refinements of Model B3 for concrete creep and shrinkage 1. Statistics and sensitivity[J]. Materials and Structures,1995,28(7): 415-430.
[2] Oluokun A F, Haghayeghi A R. Flexural behavior of reinforced concrete beams retrofitted or repaired with slurry infiltrated mat concrete[J]. ACI Structure Journal，1998，95(6):654-664.
[3] Bazant Z P. Criteria for rational prediction of creep and shrinkage of concrete[J]. ACI Special Publication,2000,194:237-260.
[4] Gardner N J, Lockman M J. Design provisions for drying shrinkage and creep of normalstrength concrete[J]. ACI Materials Journal,2001, 98(2):159-167.
[5] Turcry P, Loukili A, Haidar K, et al. Cracking tendency of selfcompacting concrete subjected to restrained shrinkage: experimental study and modeling[J]. Journal of Materials in Civil Engineering,2006,18(1):46-54.
[6] Loser R, Leemann A. Shrinkage and restrained shrinkage cracking of selfcompacting concrete compared to conventionally vibrated concrete[J]. Materials and Structures,2009,42(1):71-82.
[7] Hilaire A, Benboudjema F, Darquennes A, et al. Modeling basic creep in concrete at earlyage under compressive and tensile loading[J]. Nuclear Engineering and Design,2014,269:222-230.
[8] 陈峰，郑建岚.自密实混凝土与老混凝土的粘结收缩试验研究[J].厦门大学学报:自然科学版，2009，48(6):844-847.
[9] 陈峰，郑建岚.自密实混凝土与老混凝土粘结强度的直剪试验研究[J].建筑结构学报，2007，28(1):59 -63.
[10] 袁迎曙.钢筋混凝土结构局部补强的收缩应力分析[J].土木工程学报，1996，29(1):33-40.
[11] 刘健，赵国藩.新老混凝土粘结收缩性能研究[J].大连理工大学学报，2001，41(3):339-342.

更新日期/Last Update: 2015-02-25