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分别对复杂卷边槽钢、腹板中间V形加劲复杂卷边槽钢、腹板及翼缘中间V形加劲复杂卷边槽钢等四种截面形式,共计16根轴压简支柱进行了承载力试验。研究了此类复杂截面轴压构件的极限承载力及变形等特性。试验结果表明:中间加劲肋的存在有效地减小了板件宽厚比,大幅度提高了轴压构件的极限承载力。与相同条件下的复杂卷边槽钢相比,采用板件中间V形加劲的轴压构件承载效率可提高10%30%左右。对试验进行了有限元模拟,计算结果与试验结果吻合良好,验证了分析方法的正确性。在此基础上,利用有限元分析对比了普通卷边槽钢与复杂卷边槽钢轴压构件的极限承载力,结果表明复杂卷边槽钢构件的承载效率高于普通卷边槽钢。
Four kinds of cross-section forms of the complex curling channel steel, the V-shaped stiffened complex curling channel in the middle of the web, the V-shaped stiffened complex curling channel in the middle of the web and the flange, etc. A total of 16 axial compression- Force test. The ultimate bearing capacity and deformation of such complex cross-section members are studied. The experimental results show that the presence of the middle stiffener effectively reduces the aspect ratio and greatly increases the ultimate bearing capacity of the axial compression member. Compared with the complicated curling channel steel under the same conditions, the bearing efficiency of the axial compression member adopting the middle V-shaped stiffener can be increased by 10% to 30%. The finite element simulation of the test is carried out. The calculated results are in good agreement with the experimental results, which proves the correctness of the analytical method. On this basis, the ultimate bearing capacity of the ordinary curling channel steel and the complicated curling channel steel was compared by finite element analysis. The results show that the carrying capacity of the complicated curling channel steel member is higher than that of the ordinary curling channel steel.