عنوان مقاله [English]
The buildings and other kind of structures around the world have been subjected to terrorist attacks and bombings. This justifies the need to study the effect of blast loading on structures and the methods to prevent collapse of structures in order to save human lives and minimize financial losses. In this study, it is intended to investigate on the passive controlling effects of viscous dampers and base isolators on structures which are subjected to blast loading. Blast loading is applied on the structures with a pressure wave. This pressure wave has many uncertainties which are mentioned in different codes. For the sake of simplicity, this pressure wave will be applied on different faces of the structure. Herein, only loading on the façade or the structure is considered and the loading on the other faces of the structure are neglected as the structure doesn’t have any severe irregularities. In the 1st case, viscous dampers are added to the structure adding damping of the structure between 5 to 25% and the effect of this added damping is studied through the paper. For the 2nd case, base isolators are designed according to UBC-1997 code. Moreover, they are studied with different stiffness coefficients and the uncertainties in yielding force of these tools have been considered in numerical simulations. These passive control devices are mainly designed such that they can perform well under earthquake loads. Viscous dampers conform to the first mode of vibration of the structure and base isolators are designed according to seismic codes. Numerical simulations show that base shear in the optimized values of viscous dampers and base isolators comparing to bare frame showed 60% increase and 50% decrease, respectively. However, drifts are minimized to 1.7% for added damping values of 25%. This value is hard to reach with base isolators as the values of drifts in this case have a minimum value of 2%.