2019 Volume 75 Issue 4 Pages 251-264
This study aimed to investigate explosive spalling behavior of prestressed concrete (PC) beams subjected to fire test by heating condition as a parameter. A fire test was performed by performed by exposing PC beam specimens to one-side heating. The specimens after the heating test were then tasted under static loading to determine their load capacity empirically. Explosive spalling behavior of PC beams was further investigated by using a method proposed and estimated the proof strength of PC beam after heating test.
The result showed it would be possible to evaluate the behavior of PC members during the early stage of explosive spalling by taking the effect of initial compressive strain due to prestressing force into account. Also showed that be able to evaluate the proof strength of PC beam after fire damage by considering reduction of introduction prestress due to explosion and heating effect.