Subhan Ahmad
Pradeep Bhargava
Abstract
An experimental study is performed to assess the effect of high temperatures on ultimate and post-ultimate reserve shear strength of monolithic normal strength concrete interfaces. For this purpose, push-off specimens with constant normal stress across the interface were casted. Specimens were heated to 350, 550 and 750oC in a muffle furnace and were cooled down naturally up to the room temperature. Results showed that after exposure to 350, 550 and 750oC, ultimate shear strength was reduced by 15.9, 25.4 and 44%, respectively. Whereas, post-ultimate reserve strength remains unaffected for an exposure temperature of 350oC. When the specimens were exposed to 550 and 750oC, the reduction in post-ultimate reserve shear strength was found to be 12.4 and 21.7%, respectively.
Keywords
Shear-friction; Elevated temperature; Normal strength concrete; Ultimate shear strength; Post-ultimate shear strength
