新型外包U型钢-混凝土组合简支梁的变形计算和分析

Calculation and Analysis of the Deflections of U-section Steel-encased Concrete Composite Beams

本文根据6根足尺外包U型钢-混凝土组合简支梁的试验研究,得到在外荷载作用下的组合梁的荷载-挠度关系曲线,根据试验结果分析了U型外包钢-混凝土组合梁跨中挠度变化规律,并分析比较了三种方法下的变形计算公式,基于现行规范提出了组合梁跨中挠度的建议计算公式,把计算结果与试验结果进行比较,吻合良好。

According to an experiment conducted on six full size simple supported U-section steel-encased concrete composite beams,this essay finds out that the relationship of the load-deflection curves of the composite beams. From the experimental results,the variation laws of deflection are analyzed,and tree deflection formulas are analyzed and compared. Based on actual code,a theoretical formula is proposed for calculating deflection for composite beams. The results of theoretical formula are proved to be in good agreement with the experimental results.