均匀变化温度场中均匀干燥时抗裂圆环的理论分析  

Theoretical analysis on breaking ring in homogeneous drying process with uniform temperature field

作　　者：顾丽华[1] 张承志[2] 

机构地区：[1]河南大学土木建筑学院,河南开封475004 [2]河南大学材料与结构研究所,河南开封475004

出　　处：《水力发电学报》2015年第7期95-102,共8页Journal of Hydroelectric Engineering

基　　金：国家"十二五"科技支撑计划资助项目(2012BAB02B02)

摘　　要：本文基于弹性力学方法研究抗裂圆环中干缩变形与温度变形的协同作用,给出了抗裂圆环在均匀变化温度场中水泥基材料发生均匀干缩变形时的径向、环向应力分布、径向位移分布、径向和环向应变分布。通过研究发现:在均匀变化温度场中发生均匀干燥时,水泥基材料抗裂圆环受力状态由温度变化及干缩变化综合作用决定;干缩变形的大小对温度变形有制约作用;温度变化的幅度大小对各种分布值的大小也有显著影响。This paper uses a method based on the elastic mechanics to study the behavior ofa breaking ring caused by both dry shrinkage deformation and temperature deformation, including the distributions of its radial stress and circumferential stress, radial displacement, and radial strain and circumferential strain caused by the homogeneous drying shrinkage of its cementing material under given uniform temperature fields. The results reveal that the strain in this cement-based material ring depends on the combination of temperature deformation and drying shrinkage deformation. Additionally, the drying shrinkage deformation influences, and the temperature deformation; temperature variation has a significant effect on all of the distributions of stress, strain and displacement.

关 键 词：弹性力学 抗裂圆环 均匀变化温度场 均匀干燥 干缩变形 

分 类 号：TU528[建筑科学—建筑技术科学]