LIU Peng1,2, YU Zhi-wu1,2, SONG Li1,2, CHEN Ling-kun1,2
(1.School of Civil Engineering, Central South Univ, Changsha, Hunan 410075, China； 2.National Engineering Laboratory for High Speed Railway Construction, Central South Univ, Changsha, Hunan 410075,China) 在知网中查找 在百度中查找 在本站中查找
The response law of micro environmental temperature in one dimensional concrete under the natural environment with/without shelter was studied.Based on the Fourier heat conduction equation and third boundary condition, the response mode of micro environmental temperature in one dimensional concrete under the natural environment was inferred, and the test was carried out to testify the rationality of the mode.In addition, a new method was summarized to solve the parameters, such as thermal diffusion coefficient and surface heat transfer coefficient.The results show that the modes of micro environmental temperature in one dimensional concrete under different conditions were fitted to describe the temperature response law in concrete.The response laws were observably affected by the condition of with/without shelter, and the differences were manifested in the amplitude, extremum and occurrence time, which was caused by the difference of the heat exchange pattern.The parameters, such as the thermal diffusion coefficient and surface thermal conductance, which was inferred from the test, are high precision.
