混凝土应力计算的变形法误差分析及方法改进  

Error analysis of deformation method for stress calculation of concrete and its improvement

作　　者：冯波[1] 张志诚[1] 董霞[2] 

机构地区：[1]河海大学水利水电工程学院,江苏南京210098 [2]河海大学海洋学院,江苏南京210098

出　　处：《河海大学学报（自然科学版）》2007年第2期217-219,共3页Journal of Hohai University(Natural Sciences)

摘　　要：采用变形法计算混凝土应力时,假设应力在各个时段内以突变形式增加,并对这种假设带来的误差进行了分析.为提高精度,在渐变应力比突变应力更符合实际的基础上提出应力在各时段内线性变化的假定,在此假定下推导了应力计算的一般公式,用于实测应变资料的分析计算.与原方法比较,改进后的方法能更好地保证计算后第一应力不变量为常数.When the deformation method was used for concrete stress calculation, it was assumed that the stress increased suddenly at each stage, and such an assumption led to certain errors. Based on an analysis of the sources of errors, a linear variation of the stress at each stage was assumed, and a general formula for stress calculation was deduced. The calculated result shows that the precision is improved under the assumption of linear variation of the stress.

关 键 词：混凝土应力 变形法 误差 

分 类 号：TV431[水利工程—水工结构工程]