摘要
混凝土作为一种率敏感性材料,在不同的加载速率下表现出不同的力学特性。加之其非均匀性,使得混凝土本构关系的研究变得很复杂。通过混凝土动态抗拉行为的实验,得到应变速率对其力学参数的影响规律,通过损伤变量的引入,推导出一种直接拉伸状态下的混凝土动力损伤本构模型,并给出推导直接压缩情况下的动力损伤本构关系的方法。
As a kind of strain-rate-dependent material, concrete material shows different features subjected to different loading rates. Further more, it is often of non-uniformity.All mentioned above made the study of relationship in concrete constitution very complicated. The relationship between mechanical parameters and strain rate was acquired through dynamic tensile test. Model constitution on concrete damage under direct tensile was derived by introducing variables on damages. And the method in relation to dynamical damage with model constitution was reasoned and suggested under the condition of direct compression.
出处
《辽宁工学院学报》
2004年第6期45-47,50,共4页
Journal of Liaoning Institute of Technology(Natural Science Edition)
基金
国家自然科学基金重点基金(50139010)
