Numerical simulation for protective of reinforced concrete π beams under close-in explosion

被引：0
|
作者：
Liu C. [1 ]
Sun Q. [1 ]
Li H. [2 ]
机构：
[1] College of Civil Engineering, Tongji University, Shanghai
[2] CCCC Highway Consultants Co., Ltd., Beijing
来源：
Zhendong yu Chongji/Journal of Vibration and Shock | 2022年 / 41卷 / 04期
关键词：
Damage; Explosion protection; Near-field explosion; Numerical simulation; Π-section concrete beam;
D O I：
10.13465/j.cnki.jvs.2022.04.029
中图分类号：
学科分类号：
摘要：
In order to investigate the protection method of reinforced concrete π-beam under near-field explosion load, ANSYS/LS-DYNA was used to establish the beam explosion numerical model. According to the results of field explosion test, the failure modes of the beam under explosion load were compared, and the accuracy of numerical model was verified. Based on the numerical analysis of different protection forms of π-beams under explosive loads, the peak distribution of shock wave overpressure was studied under different protection conditions. The law of structural energy consumption, the damage pattern of the π beam after protection, and the protection efficiency of different protective layers were also investigated. The testing results indicate that the peak value of shock wave overpressure is relatively small under the combined protection of a steel plate and an aluminum foam. Besides, as the longitudinal distance increases, the impact overpressure attenuates most heavily on the roof's explosion-facing surface. Meanwhile, the combined protective of the steel plate and the aluminum foam layer has a strong energy consumption capacity, the energy consumed by accounts for 90% of the three parts of the π beam (concrete, steel, and protective layer). The failure mode of π-beams under various protective conditions is a partial failure, without overall deformation or damage to the flange plate and web. The damaged area of π-beam is relatively small under the combined protection of steel plate and aluminum foam, and the combined protection layer is relatively good. © 2022, Editorial Office of Journal of Vibration and Shock. All right reserved.
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页码：223 / 231
页数：8
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