A simplified approach for assessing the load-carrying capacity of reinforced concrete beams under concentrated load applied at high rates
A simplified approach for assessing the load-carrying capacity of reinforced concrete beams under concentrated load applied at high rates
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DOI：
10.1016/j.ijimpeng.2010.01.005
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发表时间：
2010-08-01
影响因子：
5.1
通讯作者：
Cotsovos, Demetrios M.
中科院分区：
文献类型：
--
作者：
Cotsovos, Demetrios M.
本文提出了一种评估钢筋混凝土梁在跨中集中冲击荷载作用下承载能力的简化方法。该方法将承载能力的增强与缩短梁的部分（本文称为有效长度）联系起来，该部分在实验和数值上都发现在增加加载速率下可以抵抗施加载荷的作用。通过与已发表的实验数据的对比研究，以及三维动态非线性有限元分析的数值结果，验证了所提方法的有效性。所提出的方法并不打算解释速率效应；它只是利用“有效长度”和规定的荷载率之间的明显联系，作为发展适用于实际结构设计的简化方法的手段。(C) 2010 Elsevier Ltd.版权所有，
The present article proposes a simplified method for evaluating the load-carrying capacity of reinforced concrete beams when subjected to concentrated impact loading at their mid-span. The method links the enhancement of load-carrying capacity with the shortening of the portion (termed herein effective length) of the beam which has been found both experimentally and numerically to resist the action of the applied load under increasing loading rates. The proposed method is validated through a comparative study of its predictions with published experimental data, as well as numerical results obtained by means of three dimensional dynamic nonlinear finite-element analyses. The proposed method is not intended to explain the rate effect; it merely uses the apparent link between "the effective length" and the imposed rate of loading as the means for the development of a simplified approach suitable for use in practical structural design. (C) 2010 Elsevier Ltd. All rights reserved,