安全与环境工程2024，Vol.31Issue(5)：135-145,11.DOI:10.13578/j.cnki.issn.1671-1556.20221510
考虑SSI的滑坡区输电塔线体系安全性分析
Safety analysis of transmission tower-line system in landslide area considering SSI
摘要
Abstract
In order to explore the influence of slope deformation on the safety of transmission tower-line system,taking the tower-line system of UHV transmission line located on the landslide as the research object,bases on the finite element numerical calculation method,with consideration of the influence of tower-line coupling,the soil-structure interaction(SSI),and the degree and direction of slope deformation,this paper established a over-all finite element model for transmission tower-line system,and explored the response law of the stress charac-teristics of the tower-line system to slope deformation,and put forward two monitoring parameters that can be used to evaluate the safety of transmission lines in landslide areas,namely the displacement of tower leg support and the change value of tower leg root opening.The results show that under typical slope deformation,the fail-ure of the upper tower-line system is marked by the yield of the first cross-partition,the principal and cross-diagonal members near the suspension point of the conductor.The angle of slope deformation has little effect on the failure characteristics of the tower line system,but has a significant impact on its ability to resist slope defor-mation;overall,the capacity of the tower system to bear slope deformation with a certain inclination angle is far less than that of horizontal surface deformation,most of which can only bear 70%～80%of the deformation of tower leg support under horizontal surface deformation and only bear about 60%of the deformation of tower leg support under horizontal surface deformation under tensile condition,which can provide guidance for the safety prevention and control of transmission towers in landslide areas.关键词
滑坡区/安全性分析/塔线体系/土-结构相互作用(SSI)/抗边坡变形能力/有限元数值计算方法Key words
landslide area/safety analysis/tower-line system/soil-structure interaction(SSI)/resistance to slope deformation/finite element numerical calculation method分类
资源环境引用本文复制引用
陈树平,李成,王彦海,苗红璞,李双林,周冬阳..考虑SSI的滑坡区输电塔线体系安全性分析[J].安全与环境工程,2024,31(5):135-145,11.基金项目
南方电网公司科技项目(010500KK52210002) （010500KK52210002）
国家自然科学基金项目(52079070) （52079070）
