升温和降温过程中混凝土梁内温度场的试验研究

In order to study on the heating up, cooling down rate and thermal field of concrete beam during the heat-up and cool-down phase, 8 concrete beams were exposed to high temperature in the furnace, temperature values for different locations within a concrete beam were measured in the four measured temperature conditions (400℃, 600℃, 700℃ and 800℃). Through analysis of the test data, the characteristics of the heating up rate, the cooling down rate and the variation of thermal field about the different locations within a concrete beam were obtained during the heating up and cooling down phase, providing a reference for determining a reasonable heating time when concrete beams were exposed to high temperature.