论文部分内容阅读
建立数值模型,研究钢结构节点的耐火性能。采用2种方法将火灾模拟中的热分析转变为结构分析。根据ISO834标准火灾曲线,对钢结构节点进行足尺试验,验证本方法的正确性。通过火灾动态模拟器获得壁面温度,将其对应的截面作为火灾截面置于结构表面进行分析,数值结果与试验一致。此外研究了火炉尺寸的影响和对绝缘材料的敏感性分析。分析两根翼缘削弱梁,并与无翼缘削弱梁的模拟结果对比。经历相同时间之后,两种构件均能承受严重的火灾,并发生跑道现象。
Establish a numerical model to study the fire resistance of steel structure nodes. Two methods were used to convert the thermal analysis in fire simulation to structural analysis. According to ISO834 standard fire curve, full-scale test of steel structure nodes to verify the correctness of the method. The wall temperature was obtained through the fire dynamic simulator, and the corresponding cross-section was placed on the surface of the structure as a fire cross-section for analysis. The numerical results are consistent with the experimental results. In addition, the effect of furnace size and the sensitivity analysis of insulating materials were investigated. Two flange weakening beams were analyzed and compared with the simulation results of the flangeless flange beam. After the same period of time, both components were able to withstand a serious fire and runway phenomena.