抗裂圆环的干缩应力分析 Ⅵ.不均匀干燥时钢芯壁厚的影响及抗裂性能判据  

Shrinkage Stress Analysis on Breaking Ring——Ⅵ.Influence of Thickness of Steel Core and Judgements of Anti-cracking Performance 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6期5-9,共5页China Concrete and Cement Products

摘　　要：在弹性力学基本方程的基础上,研究了不均匀干燥时钢芯壁厚对径向位移分布、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规律,并将其结果与均匀干燥情况进行了比较。通过比较发现,当钢芯壁厚较薄时,不均匀干燥时的最大环向拉应力大于均匀干燥时的最大环向拉应力;当钢芯壁厚较厚时,不均匀干燥时的最大环向拉应力小于均匀干燥时的最大环向拉应力。临界钢芯厚度随水泥基材料弹性模量的增大而增大。On the basis of the equations of elasticity, the influences of the thickness of steel core on the distribution of the radial displacement, radial strain, circumferential strain, radial stress and circumferential stress are studied under the condition of inhomogeneous drying, and the results are compared to that under the condition of homogeneously drying. It is discovered by the comparison that the maximum of circumferential tensile stress under the condition of inhomogeneous drying is larger than that under the condition of homogeneous drying if the thick of steel core is small, but the maximum of circumferential tensile stress under the condition of inhomogeneous drying is less than that under the condition of homogeneous drying if the thick of steel core is large. The critical thickness of steel core increases with the increase of the elastic modulus of cement-based material.

关 键 词：抗裂圆环 不均匀干缩变形 钢芯厚度 

分 类 号：TU528.07[建筑科学—建筑技术科学]