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在标准火灾条件下进行钢骨混凝土柱的耐火试验。以几何尺寸、三面或四面受火、荷载大小及偏心为参数,研究其对钢骨混凝土耐火性能的影响。结果表明:钢骨混凝土柱三面受火条件下的耐火性能高于四面受火;载荷比和荷载偏心的影响可以忽略;混凝土的剥落降低了柱耐火性能。将试验结果与现有规范进行对比可知,某些条件下,按规范计算的耐火性能可能偏高。
Fire tests on SRC columns under standard fire conditions. The geometrical size, three sides or four sides of the fire, load size and eccentricity as parameters, to study the fire resistance of steel reinforced concrete. The results show that the fire resistance of steel reinforced concrete column under fire on three sides is higher than that of fire on all sides; the influence of load ratio and load eccentricity can be neglected; and the spalling of concrete reduces the fire resistance of column. The test results compared with the existing specifications shows that under certain conditions, according to the standard calculation of the fire resistance may be high.