Study on Constitutive Law and Deformation Analysis Method for Concrete under High-Speed Repetitive Stress

本文的研究结果总结如下：1。提出了用于断裂分析的弹粘塑性悬架单元法。采用非线性屈服函数，考虑重复加载。输入数据是通过二维模型标本的基础实验确定的。3 .对高速重复加载下二维混凝土试件在加载速度、试件形状尺寸、粗集料位置等条件下的应力-应变曲线进行了模拟和讨论。模拟了多轴加载试验。为了模拟实验结果，对分析方法进行了扩展。

The results obtained in this research are summarized as follows :1. The elasto-visco-plastic suspension element method for the fracture analysis was developed. Non-linear yield function was adopted, and repetitive loading was considered.2. The input data are fixed by fundamental experiments with two dimensional model specimen.3. The stress-strain curves of two dimensional concrete specimens under high-speed repetitive loading were simulated and discussed under various conditions of loading speed, shape and size of specimen, and position of coarse aggregate.4. The multi-axial loading tests were simulated.5. The analytical method was expanded in order to simulate the experimental results.