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环形预应力电杆属于环形截面受弯构件,以往国内一般都是沿用1966年武汉鉴定会推荐的按破坏阶段计算的方法进行计算的。1974年我国颁布了《钢筋混凝土结构设计规范》TJ10—74(以下简称《规范》),在《规范》中增添了“预应力混凝土结构构件计算”一章,并列出了沿周边均匀配筋的环形截面受弯构件的强度计算公式。我认为今后应按《规范》,即按单一安全系数极限状态的设计方法进行电杆计算。下面介绍计算环形预应力电杆的具体方法与内容。
Circular prestressed electric poles are bent section members. In the past, they were generally calculated according to the calculation methods recommended by the 1966 Wuhan Appraisal Committee. In 1974, China promulgated the “Code for the Design of Reinforced Concrete Structures” TJ 10-74 (hereinafter referred to as “the Code”), and added the “Calculation of Prestressed Concrete Structural Members” chapter in the “Specifications”, and listed the uniform reinforcement along the periphery. The formula for calculating the strength of a bending member in a circular section. I believe that in the future, pole calculations should be carried out according to the “Code”, that is, the design method of the limit state of a single safety factor. The following describes the specific method and content for calculating the annular prestressed pole.