Abstract
Abstract Strain-rate effects can distort model testing with geometrically-similar models. In impact modelling this problem is usually addressed by revising the impact conditions, but such kind of method is inadequate for modelling impact on a reticulated dome. A new technique was proposed and tested. Apart from adjusting the impact conditions, the technique adds additional mass to components of the model to balance the strain-rate effects. That allows studying in model scale more complex structures in which the strain rate varies over the structure’s components. Model scale tests of impact on a reticulated dome showed good agreement with full scale in terms of displacements and axial forces on the structure’s rods. Those results verify the effectiveness of the new technique.
Highlights
Accidents and explosions causing damage are a matter of growing concern in civil engineering after the 9/11 terrorist attacks
This study aimed at correcting the scaling laws to account for strain-rate effects
A new technique based on partial similitude and dimensional analysis has been proposed
Summary
Accidents and explosions causing damage are a matter of growing concern in civil engineering after the 9/11 terrorist attacks. The dynamic response of reticulated domes subjected to impact loading has been investigated theoretically and experimentally in recent years (Wang X. et al, 2016; Lin L. et al, 2015; Wei D. and Hu C., 2015; Wu C. et al, 2014; Wang X. and Lei J., 2012; Zheng L., 2012; Zheng L. and Chen Z., 2011; Fan F. et al, 2010). In order to validate either theoretical or numerical results, experiments are indispensable. They are, always carried out on scaled-down models so as to be efficient and cost-effective. The dynamic response of prototypes can be predicted adequately by scaled-down model tests and through applying scaling laws (Ding B. et al, 2015; Wang D. et al, 2011; Li H. et al, 2006)
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