中文摘要：

运用ANSYS／LS—DYNA动力有限元软件建立了包含网壳杆件、檩托、檩条、铆钉、犀面板在内的精细化K8型单层球面网壳有限元模型，通过选择考虑材料应变率效应的钢材本构关系，采用流固耦合算法并考虑构件相互碰撞影响，对结构在外部爆炸荷载作用下的动力响应进行了数值模拟，获得了TNT炸药当量、爆炸点距离、杆件截而、矢跨比、支承条件、屋面板厚度、屋面荷载及屋面板形式等参数对结构动力响应的影响规律，可为网壳抗爆防护设计提供参考。网壳结构在外部爆炸荷载作用下，随着各参数取值的变化，存在“完好无损、局部凹陷、局部破坏、整体倒塌”四种破坏类型。

英文摘要：

Finite element software ANSYS/LS-DYNA is used to establish a refined kiewitt8 single-layer reticulated shell finite element model,which contains reticulated shell member, purlin hanger, purlin, rivet and roof boarding to simulate the dynamic responses of a structure subjected to external blast loading by using ALE （Arbitrary-La- grange-Euler） algorithm. The strain rate effect of materials and the inter-collision of the components are considered. The responses of the structure under external eccentric blast loading with varied TNT equivalent weights, explosion point position, section size of reticulated shell bar, rise-span ratio, supporting condition, thickness of roof board- ing, roof boarding load and the form of roof boarding are obtained by the comparison of the plastic strain, the plas- tic development degree and the displacement of the structure, which could provide a reference for reasonable de- fense design of reticulated shell structure to resisting blast. Tile results show that with the changes of each parame- ter, there are four damage modes of kiewitt8 single-layer tact, local deformation, local damage and total collapse. reticulated shell under external blast loading, that is in-