空爆作用下复合材料加固圆拱动力响应数值模拟

Numerical Simulations on Dynamic Responses of Circular Concrete Arch Strengthened with Composite Materials Under Air Blast Loading

采用分离式钢筋混凝土模型建模,利用LS-DYNA有限元计算软件,对空爆条件下复合材料加固圆拱的动力响应进行了数值分析。结果表明,内贴复合材料加固后,结构的抗爆性能得到增强;加固层数对拱结构抗爆性能影响不显著;CFRP的整体加固效果优于GFRP。

Using the discrete model of concrete arch,LS-DYNA software was adopted to numerically analyze the circu- lar concrete arch strengthened with composite materials under air blast loading. Calculation results demonstrate that strengthened arches have higher blast resistance, however the blasting resistance of the FRP strengthened concrete arch increases slowly with the increasing of thickness, generally arch reinforce with CFRP sheets perform better than that retrofitted with GFRP sheets.