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Aftershocks can always cause the collapse of structures damaged by the main earthquake. In this article, the seismic performance of an 8-story steel bending frame designed in c-type soil was first subjected to the seismic sequence of an earthquake and an aftershock, and then the same building with the addition of a fluid viscous damper (Fluid Visco...
Contexts in source publication
Context 1
... fact, this time interval is considered only to end the free vibration time of the system, which by examining the behavior of the structures studied in this study, 40 seconds was found to be a suitable number. Figure 1 shows a schematic of how earthquake and aftershock acceleration maps are placed one after the other. Garcia (2012) examined the characteristics of a wide range of earthquakes and corresponding aftershocks on the seismic response of buildings and showed that the dominant period, as well as the duration of the main earthquake and aftershocks, were statistically weakly correlated. ...
Context 2
... parameter of relative displacement, which is considered as a good representative for damage to structural members, also strongly depends on the type of damage caused by the main earthquake. The drift changes of the floors in the primary and damaged structures in different soil types are shown in Figures 8 to 12. As can be seen from Figures 8 to 12, the permanent displacement of the roof under the effect of seismic sequence is sometimes less than the permanent displacement of the roof under the effect of the main earthquake alone. ...
Context 3
... drift changes of the floors in the primary and damaged structures in different soil types are shown in Figures 8 to 12. As can be seen from Figures 8 to 12, the permanent displacement of the roof under the effect of seismic sequence is sometimes less than the permanent displacement of the roof under the effect of the main earthquake alone. This phenomenon expresses the important issue that aftershocks do not necessarily increase the permanent displacement of the structure. ...
Context 4
... the most critical frame of each structure was selected for modeling in opensees software and finally, the performance of steel bending frames was investigated through applying natural records of an original earthquake and scaled aftershock according to standard criteria 2800 in terms of maximum relative - Figure 9. Max displasement whit FVD. -EX Figure 10. Max displasement whit FVD. ...
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