Yue Zhengyuan, Zhou Jiannan, Kong Xinli, Xu Ying, Chen Yishun, Wang Bo, Huang Yimiao, Wang Peng
State Key Laboratory for Disaster Prevention & Mitigation of Explosion & Impact, Army Engineering University of PLA, Nanjing 210007, China.
Department of Housing and Urban-Rural Development of Jiangsu Province, Nanjing 210036, China.
Polymers (Basel). 2023 Mar 2;15(5):1263. doi: 10.3390/polym15051263.
With the increasing number of violent terrorist attacks around the world, it is quite a common to improve the anti-blast performance of structures by reinforcing the exterior of the structure. In order to explore the dynamic performance of polyurea reinforced concrete arch structures, a three-dimensional finite element model was established by LS-DYNA software in this paper. Under the condition of ensuring the validity of the simulation model, the dynamic response of the arch structure under the blast load is investigated. Deflection and vibration of the structure under different reinforcement models are discussed. The optimum thickness of reinforcement (approximately 5 mm) and the strengthening method for the model were found by deformation analysis. The vibration analysis shows that the vibration damping effect of the sandwich arch structure is relatively excellent, but increasing the thickness and number of layers of the polyurea does not necessarily achieve a better vibration damping function for the structure. By reasonable design of the polyurea reinforcement layer and concrete arch structure, a protective structure with excellent performance of anti-blast and vibration damping can be created. Polyurea can be used as a new form of reinforcement in practical applications.
随着世界各地暴力恐怖袭击事件的不断增加，通过加固结构外部来提高结构的抗爆性能已相当普遍。为了探究聚脲增强混凝土拱结构的动力性能，本文利用LS-DYNA软件建立了三维有限元模型。在确保模拟模型有效性的条件下，研究了拱结构在爆炸荷载作用下的动力响应。讨论了不同加固模型下结构的挠度和振动情况。通过变形分析找到了加固的最佳厚度（约5毫米）及模型的加固方法。振动分析表明，夹层拱结构的减振效果相对较好，但增加聚脲的厚度和层数并不一定能使结构获得更好的减振功能。通过合理设计聚脲加固层和混凝土拱结构，可以创建具有优异抗爆和减振性能的防护结构。聚脲在实际应用中可作为一种新型的加固形式。
