改进的新老混凝土粘结约束收缩计算模型研究  

Improved restrained shrinkage calculation model for adhesive concrete

作　　者：杨启斌[1] 

机构地区：[1]福建工程学院管理学院,福建福州350118

出　　处：《福建工程学院学报》2015年第1期22-27,共6页Journal of Fujian University of Technology

基　　金：福建省住房和城乡建设厅项目(2011-K-22);福建省教育厅项目(JA10217)

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。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 is higher than that of the only affected by the free ~ The results show that the shrinkage stress of the selfe-compacting concrete ordinary concrete especially in the early age, that the shrinkage stress is not shrinkage but is relative to the basic mechanical properties of the concrete.

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 

分 类 号：TU528[建筑科学—建筑技术科学]