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

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。

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

T o invest igate the respo nsive mechanism o f masonry w al ls subjected to blast loadings, an effectiv e analy tical model of the maso nry w all s w as f ir st ly presented. T he f inite element analyt ical so ftw are LSDYNA w as then used to simulate the defo rmat ion and the failur e mo des of the blast-loaded masonry w alls. The numerical results o f the defo rmat ion, the failure mode, the midspan displacement and the velocity of the masonr y w alls unr et rof it ted and ret rof itted w ith the elastomeric polymer w ere basically in agreement w ith the test data . In addition, a compar ison betw een the elastomer ic polymer and CFRP r et rof it ting w as made. It is demonst rated that the masonry wall s ret rof itted w ith elastomeric polymer and CFRP both have a goo d blast-resistant capacity and the ef fects of retro fit t ing with elastomeric polymer are better than those of CFRP