冷弯卷边槽钢轴压屈曲机理试验与数值研究

对6根冷弯卷边槽钢进行了轴力加载试验.其中4根试件用以研究截面高宽比和长细比对试件屈曲行为、承载力等参数的影响;另2根组合试件用以对比分析组合作用以及组合形式对试件静力性能的改善.试验结果表明：截面高宽比、长细比以及偏心是影响板组效应与承载力的重要因素,能很大程度上影响试件的屈曲形式;组合作用能大大改善试件承载力,不同的组合形式还影响试件的屈曲形式.同时,建立了有限元数值模型,考虑几何和材料非线性,并考虑初始缺陷,将计算结果与试验进行了对比分析,分析结果显示试验与数值模拟吻合良好.

Experimental Research and Simulation on Lipped Channel under Axial Compression

This paper presented the axial compression test on six lipped channels of cold-formed steel. The influence of aspect and slender ratio on static performance was studied by testing four of them. And the other two composite members were considered to prove the improvement of composition effects. The test indicated that aspect and slender ratio, as well as eccentricity were the key factors influencing the plate effects and buckling mode. Composition effects could greatly improve the bearing capacity, and the buckling mode was influenced by various combination forms. Lastly, considering geometry, material nonlinearity and initial defect, this paper created the FEM mode and analyzed the rules after the comparison between the test and FEM, both of them matched each other well.