Fire following earthquake has been reported to cause significant damage in addition to the shaking in a number of historic seismic events [1]. Considering the increasing risk of fire following earthquake and the possibility of the occurrence of conflagrations in the urban areas, the effects of seismic damage on the fire resistance of structural members need to be better understood. The objective of this study is to investigate the behavior of ductile concrete filled double-skin tube (CFDST) columns under fire loading with different initial conditions regarding the level of simulated seismic damage imposed on them prior to the fire tests. The CFDST columns, shown to provide acceptable performances under combined seismic and blast loadings [2] were studied in a series of experiments that were designed to simulate fire-following- earthquake scenarios.
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