大规格高强度角钢构件是指肢宽不小于220 mm、肢厚不小于20 mm，材质为Q420及以上的角钢构件，其在输电线路工程中已开始应用，但对于大角钢构件轴压承载力计算方法尚缺乏深入研究。针对输电线路工程常用的大角钢构件展开试验研究。根据试验结果，提出大角钢构件轴压承载力计算方法，并与国外主要规范计算结果进行比较，结果表明：该计算方法具有较好的可靠性。针对某输电塔，分别按照b类截面、推荐计算方法进行设计，采用推荐计算方法设计时，输电塔重可降低1.8%，具有较好的经济效益。%Large-section and high-strength angle steels are construction members with limb width larger than or equal to 220mm, limb thickness larger than or equal to 20mm, and strength higher than or equa1 to Q420. Such kind of members have begun to be used in the field of steel transmission towers. However the calculating method of axial bearing capacity for the members lacks further research. The axial compression column tests were conducted for the large-section and high-strength angle steels. Based on the test results, the calculating method of axial bearing capacity was put forward and coMPared with column curves from different foreign codes. It is shown that this calculating method has good reliability. Concretely to some transmission tower, according to the section B and commendatory calculating method adopted in this paper, the weight of the transmission tower could decrease 1.8% and has good economic benefits.
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