高层钢管混凝土柱-钢梁平面框架抗火性能研究

利用有限元分析软件ABAQUS，对高层钢管混凝土柱-钢梁组合框架不同区域发生火灾的情况进行数值模拟，研究高温下各构件的温度场分布以及不同区域框架受火时的变形情况、耐火极限、应力分布状况。结果表明：在考虑楼板有利作用下，钢梁上翼缘的温度最低；高层建筑的底层变形最大、耐火极限最短、钢管的应力最集中、核心混凝土处于全截面受压状态。

Fire resistance of concrete filled steel tubular column and steel beam plane frame

The numericalsimulation of a certain concrete- filled steel tubular (CFST) column and steelbeam composite frame structure in high-rise building when different parts weresubjected to fire were carried out, and the temperature distribution of structuralmembers under the high temperature, and the fire resistance,the deformationconditions, and the stress distribution  werestudied. The results show that the temperature of the topflange of the steelmember is the lowest when considering the beneficial action of floor slab.Also, the deformation of the ground floor is the most serious, the fireresistance rating is the shortest, the stress of steel tube is the mostconcentrated, and the core concrete stays compressed status of whole section.