Time–temperature analysis of bond strength of a rebar after fire exposure

Influence of cover thickness on the mechanical properties of steel bar in mortar exposed to high temperatures

“…Its excellent durability is an effective shield for other structural materials, such as reinforcing steel [3][4][5][6]. Occasionally, concrete structures are subjected to high temperatures (reactor vessels, thermal shock, fire, coal gasification vessels, some industrial applications, etc.)…”

“…The compressive strength and elasticity modulus of concrete decrease in reinforced concrete members exposed to high temperatures. The high-temperature resistance of concrete is affected by factors such as the type of aggregate and cement, the temperature and duration of the fire, sizes of structure members and the moisture content of concrete [1,3].…”

“…B. TOPÇU, A. R. BOGA AND A. DEMİR a volume expansion and consequent damage. In limestone aggregate concrete, CaCO 3 turns into CaO at 800-900 • C, and expands with temperature. Shrinkage may also start due to the decomposition of CaCO 3 into CO 2 and CaO with volume changes causing destructions [6,10].…”

Experimental and Analytical Investigation of Crack Spacing and Width for Overlaid RC Beams at Elevated Temperatures

“…The bond strengths between concrete-steel and PCM-steel are affected by temperature, and a significant reduction was observed in the bond strength at elevated temperatures (Bingöl and Gül 2009, Chiang and Tsai 2003, Chiang et al 2000. Elevated temperatures decrease the interaction of the physical bonding of cementitious material with steel.…”

Towards a reliability‐based post‐fire assessment method for concrete slabs incorporating information from inspection

“…However, few studies focus on the residual structural capacity after fire exposure (see [11,12], for example), and to the best of the authors' knowledge, no userfriendly method for assessing the maximum service load after fire exposure has been proposed. As exposure to elevated temperatures may result in permanent damage to concrete and reinforcement [1,[13][14][15], the maximum service load may be significantly reduced after fire exposure. Consequently, after a fire, the residual strength of the structure has to be assessed to determine whether the residual loadbearing capacity remains sufficient to ensure an adequate level of safety during the remaining service life.…”