摘要
跨越高速铁路输电杆塔是整个输电线路大跨越工程中重要的组成部分。本文选取一基500kV跨越高速铁路输电杆塔作为研究对象,采用ABAQUS有限元软件建立了其三维有限元模型。基于改进的一次二阶矩法(JC法)和窄界限法,对可变荷载与永久荷载共同作用下的输电杆塔进行了可靠度分析。研究结果表明,考虑10mm覆冰荷载时,输电杆塔中可靠度水平最低的杆件多数位于塔的横担处,少数位于塔腿处;输电杆塔的整体可靠度分别为4.6269,高于跨越高铁线路输电线路杆塔目标可靠指标3.7的要求。研究结果可以为跨越高速铁路输电杆塔的可靠度评估提供重要的参考依据。
Transmission tower crossing high speed railway is an important part in long span over- head Transmission Line Crossing project. In this paper, a 500KV transmission tower crossing high speed railway is selected as the research object, whose three-dimensional finite element model is established by ABAQUS finite element software. Based on the improved FOSM and narrow boundary method, the reliability of power transmission towers under the combined effect of variable load and permanent load is analyzed. The results show that most of the elements with the lowest reliability level are located at the crossarm of the tower and a few at the tower leg as considering the 10mm ice load; the overall reliability of the power transmission tower is 4.6269, which are slightly lower than the requirement of 3.7 for the transmission line crossing high speed railway. The research results can provide important reference for design of transmission tower crossing high speed railway.
作者
孟令星
刘云杰
潘海洋
MENG Lingxing;LIU Yunjie;PAN Haiyang(Shandong Electric Power Engi.Consulting Institute Co.,Ltd.,Jinan 250013,China;School of Civil Engi.,Shandong Univ.,Jinan 250061,China)
出处
《低温建筑技术》
2018年第9期57-59,共3页
Low Temperature Architecture Technology
关键词
输电杆塔
改进的一次二阶矩法
窄界限法
transmission towers
improved FOSM method
narrow boundary method
