目前,我国高压架空输电线路杆塔和变电构架结构,已广泛采用钢筋混凝土环形电杆,其中有相当一部分是属于偏心受力构件。这类构件除需进行强度计算外,尚需进行刚度、抗裂度和最大裂缝宽度的验算。然而,我国现行规范TJ10—74并未列出沿周边均匀配筋环形截面构件的相应计算公式。为此,我们进行了三批共35根环形截面受弯构件刚度和裂缝的试验研究,提出了相应计算公 At present, China’s high-voltage overhead transmission lines, towers and substation structures have been widely used in reinforced concrete annular poles, a considerable part of which are eccentric components. In addition to strength calculations for such components, the stiffness, crack resistance, and maximum crack width must be checked. However, China’s current specification TJ10-74 does not list the corresponding calculation formulas for circumferentially evenly distributed annular section members. To this end, we conducted experimental studies on the stiffness and cracks of 35 batches of annular section flexural members in three batches, and proposed corresponding calculations.