摘要
用回归和数理统计的方法对混凝土的纵横波波速比、泊松比进行了分析 ,并从理论上探讨了两者的内在联系 ;此外 ,将混凝土的变形机理与各类砂土的变形机理进行了对比 ,对扩容现象进行了合理解释 ,并对应力、应力率、应变率之间关系进行了动力学分析 .结果表明 :在同一围压条件下 ,随着加载速率的增大 ,应力 应变曲线由硬化逐渐向软化过渡 ,且呈现剪胀性的趋势增强 ;
The authors analyzed the ratio of P wave to S wave and dynamic Poisson′s ratio by mathematical statistics and regression. The inherent relationship between them is discussed in theory. Rational explanations are given in extension atmosphere and dynamic analysis is conducted among stress, stress rate and strain rate. It is found that at the same confining pressure, stress strain curve transits from hardening to softening gradually with the increase of loading rate. Compared them with several kinds of sandy soils on deformation mechanics, its shear extension property is more obvious. Logarithm of loading rate is linear with that of strain rate. [
出处
《中南工业大学学报》
CSCD
北大核心
2000年第2期112-116,共5页
Journal of Central South University of Technology(Natural Science)
基金
国家杰出青年科学基金资助项目! ( 5 962 5 40 8)
关键词
动泊松比
围压
混凝土材料
动力三轴压缩试验
concrete
dynamic Poisson′s ratio
loading rate
strain rate
confining pressure
