不同升温速率下钢管柱构件抗火试验  

Experiment on fire resistance of steel tube columns under different heating rates

作　　者：李焕群[1] 史可贞[1] 

机构地区：[1]中国人民武装警察部队学院,河北廊坊065000

出　　处：《消防科学与技术》2016年第7期895-899,共5页Fire Science and Technology

基　　金：公安部应用创新项目(2010YYCXWJXY124)

摘　　要：分别进行5个薄壁钢管柱构件在恒载升温条件下和3个构件在轴向位移约束条件下的抗火试验。在恒载升温试验组,升温速率分别设定为4.0、7.0、10.0、14.0、17.5℃/min,达到目标温度300℃后再恒温10min;在轴向位移约束试验组,试验升温速率分别为3.9、6.2、13.0℃/min,温度持续上升无恒温阶段。试验表明,恒载升温过程中,升温速率越大,构件变形随温度增量的变化越小;轴向位移约束试验中,升温速率越大,构件的内力随温度增量变化同样越小。Five transient test and 3 axial displacement restraint test on thin wall steel tube column components had been carried out respectively.In the transient test group,the heating rate were 4.0、7.0、10.0、14.0、17.5 ℃/min,after the target temperature reach 300 ℃,kept the constant temperature for 10 minutes;In the axial displacement restraint test group,the heating rate were 3.9、6.2、13.0 ℃/min,the temperature continued to rise without constant phase.The results showed that：in the course of transient test,the larger the heating rate,the smaller the variety of the distortion with the temperature increment instead;in the course of axial displacement restraint test,the larger heating rate,the smaller the variety of the internal force with the temperature increment also.

关 键 词：钢管柱构件 升温速率 恒载升温 轴向位移约束 抗火试验 

分 类 号：X913.4[环境科学与工程—安全科学] TK121[动力工程及工程热物理—工程热物理]