Experimental Study on Splitting Tension Strength of Fire-damaged Concrete with Different Influencing FactorsXIANG Kai,YU Jiang-tao,LU Zhou-dao (Research Institute of Structural Engineering and Disaster Reduction,Tongji University,Shanghai 200092,China)Splitting tension strength of fire-damaged C35 concrete was researched.The variations of concrete tension strength with maximum temperature,constant temperature time and curing process were actively tested based on concrete slices.Two formulae were proposed to calculate tension strength of fire-damaged concrete and fire-damaged concrete cured in water.The experimental results show that maximum temperature is the most important factor for concrete tension strength,and when maximum temperature is lower than 600 ℃ and constant temperature time is shorter than 60 minutes,constant temperature time is also necessary.For tension strength of fire-damaged concrete and fire-damaged concrete cured in water,the latter is higher than that in the former temperature which is above 200 ℃.splitting tension strength;maximum temperature;constant temperature time;curing process