电力勘测设计Issue(5)：34-41,102,9.DOI:10.13500/j.dlkcsj.issn1671-9913.2025.05.006
基于样本矩的四地螺塔脚板抗拔可靠度分析
Tensile Reliability Analysis of Four Ground Screw Tower Footplate Based on Sample Moments
摘要
Abstract
The four-ground screw tower footplate is widely used in overhead transmission line angle towers,and it is important to accurately assess its safety level.In view of this,a tensile reliability analysis method based on the sample moment method is constructed in this paper.By establishing a refined numerical model of the four ground snail,the weak components and damage modes are analyzed;the limit state equation for the tensile damage of the four ground snail tower footplate is given based on the yield line theory,and finally the tensile reliability index of the four ground snail tower footplate is calculated by considering the randomness of materials and loads in a typical project with the sample moment method.The analysis results show that:the tensile reliability index of the four ground snail tower footplate is 4.220 9,which can well meet the requirements of the primary target reliability index;meanwhile,the thickness of the base plate has a significant influence on the tensile reliability index of the four ground snail tower footplate,and the reliability index can be increased by 10.11%after increasing the thickness by 8mm.关键词
输电塔结构/四地螺塔脚板/抗拔可靠度/屈服线理论/样本矩方法Key words
transmission tower structure/four-ground screw tower footplate/pullout reliability/yield line theory/sample moment method分类
动力与电气工程引用本文复制引用
蒲凡,王成,刘进通,陈强,王涛,何松洋..基于样本矩的四地螺塔脚板抗拔可靠度分析[J].电力勘测设计,2025,(5):34-41,102,9.基金项目
国家电网有限公司科技项目(5200-202156071A-0-0-00). （5200-202156071A-0-0-00）
