圆形钢套管加固钢筋混凝土短柱轴心受压承载力研究

Study of capacity of behavior of reinforced concrete short column strengthened by circular steel tube under axial loading

为了研究圆形钢套管加固钢筋混凝土柱的轴心受压承载力计算方法,进行了1根未加固的普通钢筋混凝土柱和3根圆形钢套管加固钢筋混凝土短柱在不同加固钢套管厚度下的轴心受压试验,在试验结果的基础上,考虑混凝土三向受压Richard公式与蔡绍怀公式,根据叠加法与极限平衡法建立了圆形钢套管加固钢筋混凝土短柱的轴压承载力公式。研究结果表明,对比国内外规程,利用叠加法且考虑蔡绍怀公式计算出的承载力与试验结果吻合度最高。

To study the basic mechanical performance of reinforced concrete short column strengthened by circular steel tube, a set of experimental work was carried out 1 contrast unstrengthened reinforced concrete column and 3 reinforced concrete columns strengthened by circular steel tube were tested under axial loading. The primary parameter of the strengthened columns was steel tube thickness. Based on the experiment, according to the compression in trip-direction of Richard and CAI Shaohuai, this paper set up the formulas of axial compression bearing capacity applied superposition method and limit equilibrium method respectively. The results showed that the superposition method according to formulas of CAI Shaohuai on was better than the limit eqilibrium method,the resuhs by which were tallied with the experimental results.