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一简述光弹冻结应力试验中树脂的泊桑比 v 为0.48,而金属的 v 值约为0.25～0.3,混凝土的v 值(一般常用)0.167,因此光弹模型(尤其三维试验)的应力换算结果是否和金属结构,尤其是否和混凝土结构的真实弹性应力相近,一直都是争议的问题。为了了解光弹冻结应力试验对研究水利工程(混凝土坝)的适应性,为了某些水利工程(腹拱坝)控制点取值的需要,本文结合混凝土坝及其边界条件的取值问题,讨论混凝土的泊桑比值及弹性常数(E.v)在不同边界条件下对坝体应力值的影响。
A brief description of the photoelastic freeze-stress test of the Poisson’s ratio v of the resin is 0.48, while the metal v has a value of about 0.25-0.3, and the concrete v value (commonly used) 0.167. Therefore, the photoelastic model (especially three-dimensional test) Whether it is close to the metal structures, especially the true elastic stresses of concrete structures, has always been a controversial issue. In order to understand the adaptability of the photoelastic freezing stress test to the research of water conservancy project (concrete dam), in order to meet the needs of the control points of some water conservancy projects (belly arch dam), the paper discusses the value of the concrete dam and its boundary conditions Effect of Poisson ’s Ratio and Elastic Constants of Concrete on Dam Stress under Different Boundary Conditions.