钢筋混凝土柱截面温度场对承载力的影响研究  

Study on the influence of the temperature field of reinforced concrete on load bearing capacity

作　　者：陈铁鑫[1] 刘海啸[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》2015年第11期1411-1414,共4页Fire Science and Technology

基　　金：武警部队学院中青年教师科研创新计划项目(ZQNJS201533)

摘　　要：总结钢筋混凝土的高温性能,结合高温后混凝土和钢筋的本构关系与差分方法构建火灾中钢筋混凝土承重柱承载力计算的数值模型,并利用VB 6.0编制相应计算程序。利用该程序分析了不同火灾升温曲线、保护层厚度、截面尺寸情况下钢筋混凝土柱承载力的变化规律。用水枪保护经长时间高温作用的承重柱时,要确保柱内温度降至常温。配筋量一定时,可通过增大构件截面尺寸提高抗火能力。The high temperature performance of steel reinforced concrete was summarized. Combining with the constitutive relation between concrete and steel after treatment of high tempera- ture, and difference method, a method to calculate the bearing capacity of reinforced concrete columns in fire was founded. The load bearing capacity was calculated through a program which was compiled by Visual Basic 6.0. The effects of differ- ent parameters such as design fires, concrete cover, dimensions of cross section, on the load bearing capacity are analyzed. The temperature inside the columns must be normal temperature when protecting the load bearing columns under long time of high temperature by hydraulic giant. The fire resistance capaci- ty could be enhanced by enhancing the size of cross section when the quantity of steel was constant.

关 键 词：钢筋混凝土柱 温度场 承载力 抗火性能 数值模型 

分 类 号：X913.4[环境科学与工程—安全科学] TU375.3[建筑科学—结构工程]