基于Mori-Tanaka法的电化学沉积修复饱和混凝土细观描述  

Micro-scale description of saturated concrete repaired by electrochemical deposition method based on Mori-Tanaka method

作　　者：陈庆[1,2] 朱合华[1,2] 闫治国[1,2] 邓涛[3] 周帅[1,2] 

机构地区：[1]同济大学土木工程防灾国家重点实验室,上海200092 [2]同济大学岩土及地下工程教育部重点实验室,上海200092 [3]福州大学土木工程学院,福建福州350108

出　　处：《建筑结构学报》2015年第1期98-103,共6页Journal of Building Structures

基　　金：国家重点基础研究发展计划(973计划)(2011CB013800);长江学者和创新团队发展计划(JTR1029)

摘　　要：提出了含电化学沉积产物、水和混凝土基体在内的三相复合材料细观力学模型;基于Mori-Tanaka法对提出的细观力学模型进行多层次均匀化处理,获取电化学沉积修复饱和混凝土的有效性能,其中,第一层均匀化采用带修正函数的MoriTanaka法获取等效夹杂的有效性能,第二层均匀化采用Mori-Tanaka法获取修复混凝土的有效性能;将均化的三相复合材料细观模型用于预测电化学修复饱和混凝土有效性能,并与预测试验数据和已有模型进行对比。结果表明:所提模型不仅可有效地预测修复过程饱和混凝土的有效性能,还可预测未修复的饱和混凝土的弹性模量;同时,基于模型的分析发现,随着电化学沉积产物性能的提高,修复后混凝土具备更高的有效性能。A three-phase micromechanical model for the healed saturated concrete is presented,which is made up of the deposition products,water and intrinsic concrete. A multi-level homogenization scheme is developed to obtain the effective properties of the saturated concrete repaired by electrochemical deposition method based on the Mori-Tanaka method. Specifically, the properties of the equivalent inclusion are calculated by Mori-Tanaka method with modification function in the first level homogenization. In the second level homogenization,the Mori-Tanaka method is utilized to obtain the properties of the repaired concrete. The homogenized three-phase micromechanical model is utilized to predict the effective properties of the saturated concrete repaired by electrochemical deposition method. And the predicted results are compared with the experimental data and the existing models. Comparisons show that the proposed model can effectively predict the effective properties of saturated concrete repaired by electrochemical deposition method. When there is no repairing,they can predict the Young's modulus of saturated concrete. Based on the proposed micromechanical framework,it is found that the healed specimens have better performance when the deposition products exhibit higher properties.

关 键 词：饱和混凝土 细观力学模型 Mori-Tanaka法 电化学沉积修复 多层次均匀化 

分 类 号：TU528.01[建筑科学—建筑技术科学]