采用ANSYS软件对HC标准温升条件下的单层ALC板、碳钢板、岩棉板、硅酸铝板及多层复合钢板-硅酸铝板-空气层-硅酸铝板-钢板夹芯板在3 h之内的防火性能进行了研究，得到了各防火板背火面的温升曲线及耐火极限。结果表明：对于单层板，碳钢板达到耐火极限的时间为2 743 s，耐热性能最差；ALC与硅酸铝板的耐火性能最好，均在8 000 s以上到达耐火极限，但是硅酸铝的升温趋势较ALC板平缓，加热时间变长时，硅酸铝板的耐火性能将超过ALC板；对于复合夹芯板，硅酸铝厚度相等时，背火面温度随着空气层厚度的增大而减小，其中只有空气层厚度为20 mm时，夹芯板于9 543 s到达耐火极限180℃；硅酸铝的厚度为30 mm时，加温9 372 s时背火面温度达到耐火极限值180℃，其余各厚度均未达到耐火极限。为了验证所提出的夹芯板的抗火性能，对复合夹芯板进行了3 h的火烧试验，结果表明其符合耐火极限的要求。
ANSYS software was used to simulate the fire resistance of ALC board, carbon steel plate, rock wool board, aluminum silicate plate and multilayer composite panels (steel plate-aluminum silicate plate-air layer-aluminum silicate plate-steel plate) under the condition of HC standard temperature rise for 3 hours, so as to obtain the temperature rise curve and fire resistance limit of the backfire surface of each board.The results showed that the time to reach the fire resistance limit of carbon steel plate was 2 743 s, and the heat resistance of carbon steel plate was the worst.ALC board and aluminum silicate plate had the best fire resistance, both of which reached the fire resistance limit after 8 000 s. However, the heating trend of aluminum silicate plate was slower than that of ALC board. If the heating time became longer, the fire resistance of aluminum silicate plate would exceed that of ALC board.For composite sandwich panels, when the thickness of aluminum silicate plate was equal, the temperature of the backfire surface decreased with the increase of the thickness of air layer. Only when the thickness of air layer was 20 mm, the fire resistance limit of sandwich board reached 180℃ at 9 543 s. When the thickness of aluminum silicate board was 30 mm, the temperature of the backfire surface reached the fire resistance limit value of 180℃ at 9 372 s, and the other boards with different thicknesses did not reach the fire resistance limit. In order to verity the fire resistance of the proposed sandwich panel, a three-hour fire test was carried out, the results showed that the sandwich panel could meet the requirements of fire-resistant limit.