高压变电站构架避雷针结构承载力分析与加固研究  

Bearing Capacity and Reinforcement Analysis of a High Voltage Substation Framework with Lightning Rods

作　　者：王朝华 赵桂峰[2] 刘冉 陈怡文 WANG Chaohua;ZHAO Guifeng;LIU Ran;CHEN Yiwen(Electric Power Research Institute,State Grid Henan Electric Power Corporation, Zhengzhou 450052,China;School of Civil Engineering, Zhengzhou University, Zhengzhou 450001, China)

机构地区：[1]国家电网河南省电力公司电力科学研究院,河南郑州450052 [2]郑州大学土木工程学院,河南郑州450001

出　　处：《郑州大学学报（工学版）》2020年第3期85-90,共6页Journal of Zhengzhou University（Engineering Science）

基　　金：国家自然科学基金资助项目(51108425);国网河南省电力公司科技攻关项目。

摘　　要：建立了典型构架避雷针结构的ANSYS有限元模型,对其进行设计荷载组合工况下的静力承载力分析和风致动力响应分析。结果表明:典型构架避雷针结构T型相贯节点处由于构造缺陷易出现应力集中问题,在该区域设置加劲肋可显著降低相贯节点区的应力水平,有效缓解应力集中问题。现行规范拟静力方法设计的构架避雷针结构是偏于不安全的,实际设计时,建议将规范拟静力方法得到的结果乘以相应的动力放大系数δ(就本算例工况而言,建议取δ≥1.6)以考虑脉动风对结构的不利影响。The finite element model of a typical substation framework with lightning rods was established by using ANSYS software.The static bearing capacity and wind-induced dynamic response analysis were carried out under the design load combination conditions.The results showed that the stress concentration phenomenon was easy to occur due to the structural defects in the T type tubular joint of the typical substation structure with lightning rods,and it could be effectively relieved by installing stiffening ribs in the T type tubular joint area.Furthermore,the lightning rod designed by the current standard static method was unsafe.In actual design,it was suggested that the results of the pseudo static method should be multiplied by a dynamic amplification factorδto take into account the adverse effects of the pulsating wind on the structure.For the case in this paper,it was suggested thatδshould be no less than 1.6.

关 键 词：构架避雷针结构 静力承载力 风致动力响应 相贯节点 

分 类 号：TU323[建筑科学—结构工程]