Tensile failure of concrete at high loading rates : New test data on strength and fracture energy from instrumented spalling tests
Tensile failure of concrete at high loading rates : New test data on strength and fracture energy from instrumented spalling tests
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DOI：
10.1016/j.ijimpeng.2006.01.005
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发表时间：
2007-03
影响因子：
5.1
通讯作者：
J. Weerheijm;J. Doormaal
中科院分区：
文献类型：
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作者：
J. Weerheijm;J. Doormaal
为了数值预测混凝土结构在极端动态载荷（如碎片撞击和爆炸）下的反应，可靠的材料数据和材料模型至关重要。TNO-PML和德尔夫特理工大学在冲击动力学和混凝土建模领域开展合作。最近，TNO-PML开发了一种替代的分离式霍普金森杆测试方法，该方法基于旧的剥落原理，但配备了最新的诊断工具，并与先进的数值模拟相结合。动态拉伸强度的数据，最重要的是，在加载速率高达1000 GPa/s的断裂能。本文介绍了测试和测量设置，提出了新的测试数据和测试结果的分析。此外，给出了一个率相关的软化曲线，这是基于迄今为止的综合研究结果。
For the numerical prediction of the response of concrete structures under extreme dynamic loading, like debris impact and explosions, reliable material data and material models are essential. TNO-PML and the Delft University of Technology collaborate in the field of impact dynamics and concrete modelling. Recently, TNO-PML developed an alternative Split Hopkinson Bar test methodology which is based on the old principle of spalling, but equipped with up-to-date diagnostic tools and to be combined with advanced numerical simulations. Data on dynamic tensile strength and, most important, on fracture energy at loading rates up to 1000GPa/s are obtained. The paper describes the test and measurement set-up, presents the new test data and the analysis of the test results. In addition, a rate-dependent softening curve is given which is based on the integrated findings so far.