Numerical analysis of hydration heat temperature characteristics of massive concrete
1.School of Highway, Chang′an University, Xi′an， Shaanxi 710064， China； 2.No.6 Engineering, Ltd. of China Railway 20th Bureau Group, Xi′an， Shaanxi 710032， China； 3.China Railway First Survey & Design Institute Group Co.， Ltd. Xi′an， Shaanxi 710043， China
Abstract： To investigate hydration heat temperature rules of massive concrete and prevent concrete crack in early age, taking the process of concrete placement of first floor of gravity anchorage splay saddle pier foundation of Puli Extralarge bridge as an example, the hydration heat temperature was monitored continuously. Fitting analysis of the measured concrete hydration heat temperature was conducted, and a calculation model was presented based on the two terms of exponential function to show good goodness of fit for concrete hydration heat temperature rise. Using the finite element theory with consideration of environment conditions of splay saddle pier foundation, the 3D finite element model including cooling pipe was built to calculate the temperature in the process of concrete casting. The results show that the calculation results are well consistent with the measured values. The comparison analysis on hydration heat temperature of splay saddle pier foundation with or without cooling pipe offers beneficial references for practical engineering.
2015, Vol. 36 
