环形预应力混凝土构架承载力公式对比分析  

Comparative Analysis of Bearing Capacity Formula of Ring Prestressed Concrete Frame

作　　者：张玥 汪文渊 毛卓平 龚家军 罗杰 ZHANG Yue;WANG Wenyuan;MAO Zhuoping;GONG Jiajun;LUO Jie(State Grid Hunan Electric Power Company Limited Extra High Voltage Substation Company,Changsha 410004,China;Hunan Huachao Electric Power Survey and Design Consulting Company,Changsha 410004,China)

机构地区：[1]国网湖南省电力有限公司超高压变电公司,湖南长沙410004 [2]湖南华超电力勘测设计咨询有限公司,湖南长沙410004

出　　处：《湖南电力》2022年第3期87-91,共5页Hunan Electric Power

摘　　要：以湖南省某在役变电站工程为实例,分别采用《变电构架设计手册》和《变电站建筑结构设计技术规程》两种规范对环形截面预应力混凝土人字构架进行承载力计算。从公式适用范围、计算便利性及参数概念方面,分析两种规范下构架受压、受弯和受拉承载力计算公式的区别,得出后者建议公式涵盖范围更广、计算更便利,并对计算结果及数值差进行讨论。此外选取管径和配筋数量两种常见设计变量进行探讨,对比管径和配筋数量的变化对环形截面人字构架承载力的影响。在增大构架承载力以确保安全性的前提下,结合造价选取经济效益最高的设计方案,从而为新建变电站构架设计及在役混凝土构架更换工作提供参考。Combined with an in-service substation in Hunan Province,the bearing capacity of the ring section prestressed concrete herringbone frame is calculated by using two specifications,namely Design Manual for Structural Gantry of Switchyard and Technical Code for the Design of Substation Buildings and Structures.The differences between the formulas for calculating the bearing capacity under compression,bending and tension under the two codes are analyzed from the aspects of application scope,calculation convenience and parameter concept.The results show that the proposed formula the latter covers a wider range and is more convenient to calculate,and the calculation results and numerical difference are discussed.In addition,two common design variables,pipe diameter and reinforcement number,are selected to discuss the influence of pipe diameter and reinforcement number on the bearing capacity of ring section herringbone frame.On the premise of increasing the bearing capacity of the frame to ensure safety,the design scheme with the highest economic benefit is selected based on the cost,so as to provide reference for the frame design of new substation and the replacement of the in-service concrete frame.

关 键 词：预应力混凝土 构架 变电站 承载力 对比分析 

分 类 号：TV312[水利工程—水工结构工程] TM63[电气工程—电力系统及自动化]