钢管混凝土柱敏感性影响因素对比分析

Contrast analysis of sensitivity factors affecting bearing capacity of concrete filled steel tube columns

利用正交试验设计法对不同因素水平的钢管混凝土柱的敏感影响因素进行对比分析,发现核心混凝土强度对钢管混凝土中长柱的承载力影响最大,但有下降的趋势,钢管屈服强度和含钢率的影响基本相同,影响最小的是试件的长细比,但有增大的趋势,成为较为敏感的影响因素,同时指出了下一步的研究方向.

The sensitivity factors of concrete-filled steel tube columns with different level were analyzed using orthographic design method. It concludtd that the strength of concrete is the most important factor affecting the bearing capacity, while the effect of the concrete strength is minishing. The effect of the strength of steel tube and ratio of reinforcement are the same. The minimum factor is the slenderness ratio whose effect is increasing. What needs studying further was pointed out.