进行了160大规格Q420高强度双角钢十字组合截面构件的试验研究。得到了单节间和双节间压杆的受力性能和破坏模式。对该类构件进行数值模拟,考虑构件长细比、肢宽比和填板等对承载力的影响,并在此基础上提出计算方法。与试验结果进行对比,给出适合工程实际的组合截面承载力计算方法,可供工程设计参考使用。 The experimental study of 160 cross-section members of Q420 high-strength double-angle steel was carried out. The stress performance and failure modes of the single bar and double bar are obtained. The numerical simulation of this type of component is taken into account, and the influence of slenderness ratio, limb width ratio and filling plate on the bearing capacity is considered. On this basis, the calculation method is proposed. Compared with the test results, the calculation method for the bearing capacity of the combined section which is suitable for engineering practice is given, which can be used for engineering design reference.