新型外包钢-砼组合梁滑移性能的试验

Experimental Research on the Interface Slips of New Shape Steel-encased Concrete Composite Beams

在新型外包钢-砼组合梁中,交界面相对滑移是影响构件受力性能的一个重要因素。为研究其交界面相对滑移性能,通过3根足尺新型外包钢-砼组合梁的试验研究,得到组合梁不同截面的荷载-滑移关系曲线,根据试验结果分析了新型外包钢-砼组合梁交界面相对滑移发展过程和分布规律。从理论上建立了新型外包钢-砼组合梁交界面相对滑移微分方程,得到了组合梁交界面相对滑移量的计算公式,并通过试验数据对其进行验证,理论计算结果与试验结果吻合良好。

The interface slip of the new shape steel - encased concrete composite beams is an important factor in affecting its working behavior. To researeh the interface slip character, three full size simple supported samples have been performed; the load - slip curves are established through experiment. Based on these results, the interface slip development process and laws are gained. A differential equation is established for the interface slip and a calculating formula is established for the interface slip through theoretical analysis. A good agreement is obtained between the calculating results and the experimental results.