Title: Residual Lateral Load Capacity of a High Strength Reinforced Concrete Column after Fire Damage
Author(s): Hossein Mostafaei
Publication: Symposium Paper
Appears on pages(s): 1-12
Keywords: Fire-damage, seismic/lateral resistance, high strength concrete, column, steel fibre, hybrid test, fire resistance, performance-based evaluation.
National Research Council Canada has recently upgraded its column furnace facility for assessment of columns in fire under not only the applied axial loads but also a potential lateral load. The main goal for this upgrade was to be able to simulate lateral displacement of columns during the fire due to thermal expansion of slabs/floors and to assess a column’s residual seismic/lateral load capacity after fire damage. Furthermore, the new column facility enhancement included a hybrid testing technology in which the column could be tested considering its structural interactions with the remaining of the structure. This paper includes the summary of the new upgrade and testing technology; however, more focus will be on the structural response of a high strength column, with steel fibre, tested using the new upgrade and approach. This includes the fire test of the high strength column specimen as well as lateral load test of the column to determine its residual lateral resistance with fire damage. The results of these tests revealed that fire substantially reduced the residual lateral load/displacement capacity of the high strength concrete column. The new commissioned testing technique/tool could assist researchers to seek and find solutions for more reliable post-fire structural inspection and to develop design tools for the mitigation.