为了研究高强钢中厚板焊接箱形柱的极限承载力,以11 mm厚国产Q460高强钢中厚板制作了7个焊接箱形柱进行轴心受压试验。试件共包含宽厚比8、12、18三种截面,长细比分别为35、50、70。根据试件的实测尺寸、钢材的力学性能建立有限元模型,以初始缺陷的形式考虑了试件的初始挠度、初始偏心及焊接残余应力,分析预测了试件的极限承载力。试验结果表明,高强钢焊接箱形柱稳定系数采用GB 50017—2003《钢结构设计规范》中的c类截面柱子曲线偏保守,试验结果平均曲线更接近b类截面曲线,但仍需进一步验证。分析结果表明,考虑了初始缺陷的有限元模型可准确预测柱的极限承载力,可以作为试验数据的补充。 In order to study the ultimate bearing capacity of high-strength steel plate welded box-shaped columns, seven welded box-shaped columns with 11 mm thick domestic Q460 high strength steel plate were tested for axial compression. The specimen contains a total thickness ratio of 8,12,18 cross-section, slenderness ratio 35,50,70 respectively. According to the measured size of the specimen and the mechanical properties of the steel, a finite element model is established. The initial deflection, initial eccentricity and residual stress of the specimen are considered in the form of initial defects, and the ultimate bearing capacity of the specimen is analyzed and predicted. The test results show that the stability coefficient of welded box-shaped columns of high strength steel is conservative using the c-type cross-section column curve in GB 50017-2003 Code for Design of Steel Structures. The average curve of test results is closer to the curve of b-type section, but further verification is needed. The analysis results show that the finite element model considering the initial defect can accurately predict the ultimate bearing capacity of the column, which can be used as a supplement to the experimental data.