Size effect of reinforced concrete beams under explosive loadings-An experimental and numerical study

IF 5.1 2区工程技术 Q1 ENGINEERING, MECHANICAL

International Journal of Impact Engineering Pub Date : 2024-12-12 DOI:10.1016/j.ijimpeng.2024.105207

J.S. Cheng, H.M. Wen, S.T. Cui, Y.L. Zhang

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Abstract

A combined experimental and numerical study has been carried out herein to investigate the size effect of reinforced concrete (RC) beams under explosive loadings. The RC beam specimens are designed strictly according to geometrically similar scaling law. The damage and failure of the specimens are compared and discussed. The measured dimensionless parameters are statistically analyzed, which can be used to assess the damage of RC beams. Both the experimental and numerical results show that there exists significant size effect on RC beams under explosive loadings with the small-size beams having stronger load bearing capacities and less damages than the medium and large-size beams which have weaker load bearing capacities and suffer more damages. The failure morphologies and values of dimensionless parameters of the RC beams obtained by numerical simulations are found to be in good agreement with the experimental observations. Further analysis reveals that the size effect of RC beams under explosive loadings is due to tensile strain rate effects of concrete.

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来源期刊

International Journal of Impact Engineering 工程技术-工程：机械

CiteScore

8.70

自引率

13.70%

发文量

241

审稿时长

52 days

期刊介绍： The International Journal of Impact Engineering, established in 1983 publishes original research findings related to the response of structures, components and materials subjected to impact, blast and high-rate loading. Areas relevant to the journal encompass the following general topics and those associated with them: -Behaviour and failure of structures and materials under impact and blast loading -Systems for protection and absorption of impact and blast loading -Terminal ballistics -Dynamic behaviour and failure of materials including plasticity and fracture -Stress waves -Structural crashworthiness -High-rate mechanical and forming processes -Impact, blast and high-rate loading/measurement techniques and their applications