The objective of this study is to investigate the residual punching shear capacity of reinforced concrete slabs after elevated temperatures. Eleven specimens were tested to examine the effects of concrete strength, tensile steel ratio, and heating time on punching shear capacity. The specimens were exposed to elevated temperature in accordance with the ASTM E119 fire curve. The temperature distribution, load-deflection relationship, and residual punching shear capacity of the specimens were evaluated. Test results revealed that the specimens attained satisfactory load-carrying capacity without punching failure at two and three hours of fire load while subjected to service load. The residual punching shear capacity was decreased with the increase of heating time. Finite element analysis can reasonably predict temperature distributions of the specimens. A procedure was proposed to calculate the residual punching shear capacity that reasonably predict the residual punching shear capacity of reinforced concrete slabs after elevated temperatures.
|Number of pages||10|
|Journal||Journal of the Chinese Institute of Civil and Hydraulic Engineering|
|State||Published - 1 Mar 2013|
- Elevated temperature
- Heating time
- Punching shear capacity
- Reinforced concrete slab