保温混凝土细观模型建立及导热系数分析  

Meso-model establishment and thermal conductivity analysis of thermal insulation concrete

作　　者：王绎景 秦渊 王文婧[1] 李珠[1] WANG Yijin;QIN Yuan;WANG Wenjing;LI Zhu(College of Architecture and Civil Engineering,Taiyuan University of Technology,Taiyuan 030024,China;Sunshine KAIDI New Energy Group Co.Ltd.,Wuhan 430223,China)

机构地区：[1]太原理工大学土木与建筑工程学院,山西太原030024 [2]阳光凯迪新能源集团有限公司,湖北武汉430223

出　　处：《新型建筑材料》2018年第11期67-72,共6页New Building Materials

基　　金：国家自然科学基金项目(51508370;51678384)

摘　　要：研究建立了针对含有大量玻化微珠颗粒的二维保温混凝土细观模型,给出了一种基于图片数字化处理方法的背景网格划分方法,有效克服了由于模型尺寸小、数量大等因素造成的有限元网格划分困难的问题。采用该模型进行保温混凝土导热系数数值模拟,并与试验数据相比较,验证了模型的有效性,且误差较小。对3种不同粗骨料形状的保温混凝土的导热系数进行了模拟分析,结果表明,粗骨料形状对保温混凝土的导热系数影响不大。In this study,a background-grid method based on digital image processing method is proposed for thermal insula- tion concrete （TIC） containing a large number of glazed hollow bead. This method can effectively overcome the problem of limited element mesh generation caused by the factors of small model size and large number and a 2-D meso-scale model of TIC is es- tablished. The thermal conductivity of the TIC was numerically simulated,and the numerical results were compared with the exper- imental data to verify the effectiveness of the model and the error is small. Finally,the thermal conductivity of TIC with three dif- ferent shapes of coarse aggregate is simulated and analyzed. The results show that the shape of coarse aggregate has little effect on the thermal conductivity of thermal insulation concrete.

关 键 词：保温混凝土 细观模型 背景网格 图片数字化处理 导热系数 

分 类 号：TU551.31[建筑科学—建筑技术科学]