为了验证塔架结构采用高强钢的适用性,对21根不同规格的Q420高强度双角钢进行铰支轴压试验,截面规格包括2L160×12、2L160×14、2L160×16,长细比范围为25 ～55.将试验结果和设计结果分析比较.结果表明:承载力的设计值比试验值平均高9.16％；双角钢十字组合截面类构件最终破坏表现为弯曲屈曲与局部失稳的组合；扭转屈曲不是双角钢十字组合截面类构件的主要破坏模式,与现有设计方法不同.%To verify the applicability of high-strength steel to lattice-steel towers, an experiment covering 21 Q420 specimens, involving 3 different sectional dimensions (2L160 x 12, 2LI60 x 14, and 2L160 x 16) and 7 kinds of slenderness ratios ranging from 25 to 55, was run to test the bearing capacity of pinned-end cruciform section members. The test results were compared with the designed ones, showing that the existing design values of strength are 9. 16% higher than the test results in average; the failure mode of the thin-walled open cross section member is a mixture of flexural buckling and local instability; and torsional buckling is not the main failure mode for this kind of member, which is different with the available design concepts.
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