关键词: 碳纤维混凝土, 电热效应, 数值模拟, 升温曲线, 机场道面

Abstract:

In orderto investigate the de-icing effect of carbon fiber concrete(CFRC) pavement, this paper verifiesthe reliability of numerical simulation of the electrothermal temperature rise process of CFRC pavement slab by comparing the results of indoor tests with those of ABAQUS electrothermal effect analysis, and investigates the temperature rise law of pavement with and without insulation layer, under different voltage, carbon fiber content, external temperature and wind speed level. The simulation results show that the higher the carbon fiber content, the less the influence of input voltage on the temperature rise rate of the pavement slab, and when the carbon fiber content reaches 1.7%, the influence on the temperature rise rate of the pavement slab will no longer be obvious.

The initial external temperature has little effect on the temperature rise rate of the pavement slab, and the higher the external wind speed level, the slower the temperature rise rate. When the external wind speed level is higher than level three, the voltage impact on the pavement slab temperature rise is greater, when the wind speed reaches level six, It is difficult for the pavement slab to warm up to 0°C under the voltage below 90V. When the external temperature is -10°C, the heating rate of the pavement slab with insulation layer is faster than that without insulation layer, and when the wind speed level is lower than level three, the de-icing effect of the road panel with and without insulation layer is small. By studying the model temperature rise curves under different influencing factors, reference can be provided for the construction of CFRC airport pavement in cold regions.

Key words: carbon fiber concrete(CFRC), electrothermal effect, numerical simulation, temperature rise curve, airport pavement