内配格构式角钢圆钢管混凝土梁受弯承载力试验及计算

EXPERIMENT AND CALCULATION OF THE BENDING CAPACITY OF CONCRETE FILLED CIRCULAR STEEL BEAMS WITH LATTICED STEEL ANGLES INSIDE

通过对内配格构式角钢钢管混凝土试件进行四点弯曲试验,获得了试件的荷载-位移曲线和受弯承载力等试验数据。在试验的基础上,通过极限平衡法推导了该类型试件的受弯承载力计算式,并将公式计算结果与试验结果进行了对比。研究结果表明:内配角钢的存在明显地提高了试件的受弯承载力,且试件的受弯承载力随着内配角钢面积的增加而提高;基于极限平衡法提出的承载力计算式可以比较准确且偏于安全地预测该类型试件的受弯承载力。

Based on four-point bending test of concrete-filled steel tubes with latticed steel angles inside,the loaddisplacement curve and ultimate bending capacity of specimen were obtained. On the basis of test,the limit equilibrium method was used to deduce formula of the bending capacity,the calculation results of the limit equilibrium method were compared with the experiment results. Research results showed that the existence of the internal steel angles could increase the bending capacity obviously,specimen with larger area of steel angles would get larger bending capacity;the calculation formula obtained from the limit equilibrium method was accurate and reliable in predicting the bending capacity of this type of component.