弹性聚合物和碳纤维布加固的砌体墙抗爆性能的数值分析

Numerical analysis on blast-resistant capacity of masonry walls retrofitted with elastomeric polymer and CFRP

为研究砌体墙在爆炸荷载下的响应机理,建立了墙体的有效分析模型,并采用有限元分析软件LS-DYNA对砌体墙在爆炸荷载作用下的变形与破坏模式进行数值模拟。计算得到未加固和弹性聚合物加固墙体的整体变形与破坏模式、跨中位移与速度等的数值模拟结果与试验数据基本一致。给出了弹性聚合物和碳纤维布CFRP(carbon fiber rein forced plastic)材料加固效果的比较,并指出采用这2种材料加固的墙体均具有较好的抗爆性能,碳纤维布材料加固的效果要好于弹性聚合物材料。

To investigate the responsive mechanism of masonry walls subjected to blast loadings,an effective analytical model of the masonry walls was firstly presented.The finite element analytical software LS-DYNA was then used to simulate the deformation and the failure modes of the blast-loaded masonry walls.The numerical results of the deformation,the failure mode,the midspan displacement and the velocity of the masonry walls unretrofitted and retrofitted with the elastomeric polymer were basically in agreement with the test data. In addition,a comparison between the elastomeric polymer and CFRP retrofitting was made.It is demonstrated that the masonry walls retrofitted with elastomeric polymer and CFRP both have a good blast-resistant capacity and the effects of retrofitting with elastomeric polymer are better than those of CFRP.