论文部分内容阅读
使用试验和数值方法研究轴向压缩荷载下双层中空钢管混凝土柱的性能。对一个外层为八边形钢管﹑内层为环形PVC-U管﹑且在两层间填充高强混凝土的双层中空钢管混凝土柱进行研究。测试混凝土强度﹑径厚比﹑空心率﹑长细比对双层钢管混凝土柱的极限轴压承载力的影响。经测试发现:双层中空钢管混凝土柱的极限轴压承载力随着混凝土强度的增加而增加,但随着径厚比或空心率的增加而减少。根据试验结果,提出一个能预测双层中空钢管混凝土柱极限轴压承载力的设计公式。
Experimental and numerical methods were used to study the performance of double hollow concrete filled steel tubular columns under axial compressive loads. A double-layer hollow CFST column with an outer layer of octagonal steel tube, an inner layer of PVC-U tube, and a high-strength concrete filled between two layers was studied. Effect of Concrete Strength, Radial Thickness Ratio, Hollow Ratio and Slenderness Ratio on Ultimate Axial Bearing Capacity of Double - Stranded Concrete Filled Steel Tubular Columns. The tests show that the ultimate axial compressive load of double-walled CFST columns increases with the increase of concrete strength, but decreases with the increase of diameter-thickness ratio or hollowness. Based on the test results, a design formula that can predict the ultimate bearing capacity of double hollow steel tubular columns is proposed.