Tensile fracture of concrete at high loading rates taking account of inertia and crack velocity effects
Tensile fracture of concrete at high loading rates taking account of inertia and crack velocity effects
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DOI：
10.1007/978-94-011-3638-9_3
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发表时间：
1991-09
影响因子：
2.5
通讯作者：
Hans W. Reinhardt;J. Weerheijm
中科院分区：
文献类型：
--
作者：
Hans W. Reinhardt;J. Weerheijm
混凝土的试验表明，随着加载速率的增加，表观抗拉强度有相当大的增加。这一现象可归因于各种机制，如在运行裂纹附近的能量障碍和惯性效应的动力学。在对混凝土在单轴拉应力下的行为进行一般介绍后，提出了一个模型，该模型考虑了混凝土中的缺陷和高加载速率下裂缝周围的惯性效应。结果表明，该模型较准确地预测了混凝土表观强度与加载速率的关系、混凝土质量对表观强度与加载速率的影响以及裂缝扩展速度与加载速率的关系。
Experiments on concrete have shown a considerable increase of apparent tensile strength with increasing loading rate. This phenomenon can be attributed to various mechanisms such as kinetics of energy barriers and inertia effects in the vicinity of a running crack. After a general introduction into the behaviour of concrete under a uniaxial tensile stress, a model is presented which accounts for flaws in concrete and the inertia effects around a crack at high loading rates. It turns out that the quite crude model predicts rather accurately the relation between apparent strength and loading rate, the influence of concrete quality on this relation, and the relation between crack propagation velocity and loading rate.