论文部分内容阅读
关于实心钢管混凝土的耐火性能已有大量的实验研究,而空心钢管混凝土的耐火实验目前还非常少见。针对这一不足,对空心钢管混凝土进行了耐火实验研究,其中考虑了不同的空心率,并对中空注水对构件耐火性能的影响也进行了实验研究。实验结果表明:在相同的荷栽比下,构件的耐火时间随空心率先增大后减小。当空心率较小时,中空注水对构件耐火时间的提高作用不明显;当空心率较大时,注水对耐火时间的提高才体现出来。
There have been a lot of experimental studies on the fire resistance of concrete-filled CFST. However, the fire resistance of CFST is still rare at present. In response to this deficiency, the fire-resistance experiment of hollow concrete filled steel tubular was studied, in which different void ratios were considered, and the influence of hollow water injection on the fire resistance of components was also studied. The experimental results show that under the same loading ratio, the refractory time of the component firstly increases and then decreases with the hollow rate. When the hollow rate is small, the effect of hollow water injection on the refractory time is not obvious. When the hollow ratio is larger, the water injection improves the refractory time.