Abstract
The blast threats in confined environments are paid more attentions recently. Because of these uniquely large confined spaces, spatial structures become the perfect places of terrorist attacks. However, the responses of spatial structures under blast loading are not clear to give advises on blast-resistant design. In this study, the dynamic responses of single-layer reticulated dome subjected to interior blast loads were investigated with the effect of static preloading, which are more realistic with the real situations. With the applying of full-range analysis methods, some important structural responses were monitored with the blast loads increasing. In particular, four different failure modes of reticulated dome were identified. They are slight damage of members, local fracture of the dome, counter-intuitive collapse of the dome and comprehensive failure respectively.
