Effect of corrugated steel angle on the damage characteristics and anti‐explosion performance of corrugated steel–concrete composite structures

Kelei Cao, Qiaofeng Fu, Jianwei Zhang, Changxing Tang, Jinlin Huang, Chao Wang, Weifeng Bai
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Abstract

A three‐dimensional refined numerical simulation model of a corrugated steel–concrete slab composite structure under contact explosion load was established by the finite element model and smoothed particle hydrodynamics(FEM‐SPH) coupling method to explore the anti‐knock properties of corrugated steel reinforced concrete slabs with different angles. The effects of corrugated steel angle on the dynamic response, damage evolution characteristics, damage mode, anti‐knock property, and propagation mechanism of the shock wave in the composite structure were investigated, and the damage prediction and anti‐knock property evaluation of the composite structure were carried out. The results show that the simulation results of the mid‐span displacement of the corrugated steel are consistent with the experimental results, and the maximum error is 2.3%, which verifies the effectiveness of the contact explosion simulation process. The mid‐span displacement, peak stress, acceleration at the center point, and energy absorption value of 90° corrugated steel are 17.9%, 70.5%, 88.6%, and 59.4% lower than those of 30° corrugated steel. The damage range of the composite structure gradually decreases with increasing angle of the corrugated steel. The failure volume of the concrete slab reinforced by corrugated steel with different angles decreases with increasing angle of the corrugated steel, and the energy absorption value of the composite structure increases with increasing of angle of the corrugated steel, mainly because the corrugated steel increases the number of reflections of the stress wave. The research results can provide a theoretical basis for the application of composite structures in the field of structural anti‐explosion protection.
波纹角钢对波纹钢-混凝土复合结构的破坏特性和抗爆性能的影响
采用有限元模型和平滑粒子流体力学(FEM-SPH)耦合方法,建立了接触爆炸荷载作用下波纹钢-混凝土板复合结构的三维精细数值模拟模型,探讨了不同角度波纹钢筋混凝土板的抗冲击性能。研究了波纹钢角度对复合结构动态响应、损伤演化特征、损伤模式、抗冲击性能以及冲击波在复合结构中传播机理的影响,并对复合结构进行了损伤预测和抗冲击性能评价。结果表明,波纹钢的中跨位移模拟结果与实验结果一致,最大误差为 2.3%,验证了接触爆炸模拟过程的有效性。与 30°波纹钢相比,90°波纹钢的中跨位移、峰值应力、中心点加速度和能量吸收值分别降低了 17.9%、70.5%、88.6% 和 59.4%。随着波纹钢角度的增大,复合结构的破坏范围逐渐减小。不同角度波纹钢加固的混凝土板的破坏体积随波纹钢角度的增大而减小,复合结构的能量吸收值随波纹钢角度的增大而增大,这主要是因为波纹钢增加了应力波的反射次数。研究结果可为复合结构在结构防爆领域的应用提供理论依据。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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