The effects of polyurea coating on anti-explosion performances of reinforced concrete arches were studied through explosion experiments. Three coating schemes were proposed and investigated, including intrados coating, enclosed coating and fiber-grid/polyurea hybrid coating. The arches exhibit cracking, spalling and crashing failure modes in succession accompanying with reducing the scaled distance. The damage degree of the exploded arch is evaluated quantitatively by the residual load carrying capacity under quasi-static mid-span concentrated loading experiments. It is revealed that polyurea coatings have excellent anti-spalling ability than carbon fiber-reinforced polymer (CFRP) strengthening method and greatly increase the blast-resistance of the concrete arch and enclosed polyurea coating is the most efficient.

通过爆炸实验研究了聚脲涂层对钢筋混凝土拱的抗爆性能的影响。提出并研究了三种涂层方案，包括内部涂层，封闭涂层和纤维网/聚脲杂化涂层。拱形结构依次呈现出开裂，剥落和碰撞的破坏模式，并减小了按比例缩小的距离。在准静态中跨集中载荷试验下，通过残余载荷承载能力定量评估了爆炸拱的破坏程度。结果表明，聚脲涂料比碳纤维增强聚合物（CFRP）增强方法具有出色的抗剥落能力，并且大大提高了混凝土拱的抗爆炸性，而封闭聚脲涂料是最有效的。