钢管混凝土构件在爆炸冲击荷载作用下的动力仿真分析

Dynamic simulation analysis on concrete filled steel tubular(CFST) subjected to blast loads

采用有限元分析软件ANSYS/LS-DYNA对圆钢管混凝土结构构件在爆炸冲击荷载作用下的动力响应特性进行了数值模拟。通过分析钢管混凝土构件在不同折合距离下的侧向位移和核心混凝土的失效破坏情况,得到在爆炸冲击荷载作用下随着折合距离的增大,钢管混凝土构件的整体变形逐渐减小,钢管和核心混凝土的破坏程度也逐渐减小,特别是当折合距离大于2.0时,爆炸冲击荷载对圆钢管混凝土构件的影响可以忽略不计。

The dynamic response was simulated on the circular steel tubular structures（CFST） under blast loading with the finite element analysis software ANSYS/LS-DYNA.According to analysis the lateral displacement of the different equivalent distance and the failure of concrete,we can obtain that the overall deformation of CFST decreases and the damage of the tube and concrete is gradually reduced under the blast loading.Especially the blast loading effects on the CFST is negligible when the equivalent distance is greater than 2.0.