抗裂圆环的干缩应力分析Ⅴ.不均匀干燥时水泥基材料弹性模量的影响  

Shrinkage Stress Analysis on Breaking Ring——V.Effects on Elastic Modules of Cement-based Materials for Inhomogeneously Drying Process

作　　者：张承志[1] 王爱勤[2] 陈文耀 

机构地区：[1]河南大学材料与结构研究所,开封475004 [2]中原工学院建筑工程学院,郑州450007 [3]中国水利水电第三工程局有限公司,西安710016

出　　处：《混凝土与水泥制品》2014年第5期8-11,共4页China Concrete and Cement Products

摘　　要：根据弹性力学基本方程,研究了不均匀干燥时水泥基材料弹性模量对径向位移分布、径向应变分布、环向应变分布、径向应力分布和环向应力分布的影响,并与均匀干燥情况进行了比较。通过比较发现,不均匀干燥时的最大径向位移、最大径向应变、最大环向应变和最大径向应力都比均匀干燥时的小。采用实芯钢芯时,不均匀干燥时的最大环向拉应力也比均匀干燥时的小;采用空芯钢芯时,不均匀干燥时的最大环向拉应力有可能超过均匀干燥时的最大环向拉应力。水泥基材料的弹性模量越高,这种可能性就越大。According to the equations of elasticity, the influences of the elastic modulus of cement-based material on the distribution of the radial displacement, radial strain, circumferential strain, radial stress and circumferential stress under the drying inhomogeneous condition are studied, and they are compared with these under the drying homogeneous condition. It is discovered by comparison that the maxima of the radial displacement, the radial strain, the circumferential strain and the radial stress under the drying inhomogeneous condition are less than that under the drying homogeneous condition. If solid steel core is used, the maximum of the circumferential tensile stress under the drying inhomogeneous condition is also less than that under the drying homogeneous condition. However, if hollow steel core is used, it is possible that the maximum of the circumferential tensile stress under the drying inhomogeneous condition is over that under the drying homogeneous condition. The higher the elastic modulus of cement-based material, the larger the possibility is.

关 键 词：抗裂圆环 不均匀干缩变形 水泥基材料弹性模量 

分 类 号：TU528.07[建筑科学—建筑技术科学]