A unified approach for concrete impact
A unified approach for concrete impact
复制标题
实现具体影响的统一方法
DOI：
10.1016/j.ijimpeng.2014.11.015
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发表时间：
2015-03-01
影响因子：
5.1
通讯作者：
Xian, Y. X.
中科院分区：
文献类型：
--
作者：
Wen, H. M.;Xian, Y. X.
本文提出了一个统一的方法，具体的影响，这是一个扩展和进一步发展的UMIST公式。本文包括两个部分，即一个关键的概述和评估的UMIST公式的准确性，在新的测试结果和最近提供的数据之后，通过引入以前建议的平均阻力压力，推导出一套新的经验公式，以预测受弹丸撞击的钢筋混凝土靶的穿透深度，贯穿厚度的锥体开裂，结痂和穿孔。结果表明，UMIST公式可以用于与合理的信心，大质量的低速弹丸的影响到钢筋混凝土目标，他们大大低估了结痂的钢筋混凝土目标击中非平头导弹和显着高估穿孔非常厚的混凝土目标相比，实验数据。计算结果还表明，本文的经验公式在较宽的冲击条件范围内与已有的实验数据符合得很好，不仅适用于平头弹，而且适用于非平头弹，锥形、球形、卵形）导弹;不仅适用于低强度混凝土，而且适用于高强度混凝土;不仅适用于低撞击速度，而且适用于高撞击速度;修正的UMIST公式与现有的试验数据合理吻合。(C)2014爱思唯尔有限公司版权所有。
A unified approach is presented herein for concrete impact which represents an extension and further development of the UMIST formulae. The paper consists of two parts, i.e. a critical overview and assessment of the accuracy of the UMIST formulae in the wake of the new test results and the data made available recently; derivation of a new set of empirical equations by introducing a previously suggested mean resistive pressure to predict the depth of penetration, through-thickness cone cracking, scabbing and perforation of reinforced concrete targets subjected to projectile impact. It is shown that the UMIST formulae can be used with reasonable confidence for large mass low velocity projectile impact onto reinforced concrete targets and that they considerably underestimate the scabbing of reinforced concrete targets struck by non-flat-ended missiles and significantly overpredict the perforation of very thick concrete targets as compared to the experimental data. It is also shown that the present empirical formulae are in good agreement with available experimental data over a wider range of impact conditions, being applicable not only to flat-faced projectiles but also to non-flat-ended (i.e., conical-, spherical-, ogival-nosed) missiles; not only to low strength concrete but also to high strength concrete; not only to low impact velocity but also to high impact velocity and that the modified UMIST formulae are in reasonable agreement with available test data. (C) 2014 Elsevier Ltd. All rights reserved.