采动区覆冰输电线路塔线体系内力变化规律  

Internal Force Variation Law of Tower Line System Under Ice Coating in Mining Subsidence Area

作　　者：杨风州 夏军武[1] 窦国涛[1] 段晓牧[1] 

机构地区：[1]中国矿业大学江苏省土木工程环境灾变与结构可靠性重点实验室,江苏徐州221008

出　　处：《煤炭工程》2015年第3期93-95,99,共4页Coal Engineering

基　　金：国家自然科学基金资助项目(51274192);江苏高校优势学科建设工程资助项目(PAPD)

摘　　要：为了揭示覆冰和地表变形耦合作用对采动区输电线路铁塔内力的影响规律,建立了两档一塔的梁桁混合有限元模型,根据下沉盆地地表变形规律,研究了覆冰作用下采动区塔线体系铁塔的支座竖向反力、杆件应力的变化规律。结果表明:塔线体系20mm覆冰作用下,铁塔的远侧支座竖向反力随最大下沉值增大而增大,而近侧支座竖向反力由压力变为拉力;随最大下沉值增大,铁塔底部主材应力变化较上部主材应力变化明显;当铁塔位于最大倾斜点时,塔线体系铁塔受力最不利。In order to reveal the combined effects of ice coating and ground deformation on mining area transmission line system,a study on the unbalanced tension,vertical reaction force,rod stress of transmission tower under ice coating and ground deformation was carried out applying finite element model based on the law of ground deformation in mining subsidence area. The results show that,when the system is under 20 mm ice coating, with the increase of maximum subsidence,distal vertical reaction force increases,proximal vertical reaction force turns into tension from pressure; with the increase of maximum subsidence,the bottom main rod stress changes more obviously than upper main rod; when the tower is at the maximum tilt point,the system is under the most unfavorable condition.

关 键 词：塔线体系 下沉盆地 地表变形 输电塔 覆冰 

分 类 号：TD823[矿业工程—煤矿开采] TM753[矿业工程—矿山开采]