Please wait a minute...
J4  2013, Vol. 47 Issue (11): 1917-1925    DOI: 10.3785/j.issn.1008-973X.2013.11.005
土木工程     
覆冰导线静张力对输电塔横担的作用特征
楼文娟1,杨伦1,陈勇1,阎东2
1. 浙江大学 结构工程研究所,浙江 杭州 310058; 2. 河南电力试验研究院,河南 郑州 450052
Study on mechanical features of transmission tower cross arm under static tension of iced conductor
LOU Wen-Juan 1,YANG Lun 1,CHEN Yong1,YAN Dong2
1. Institute of Structural Engineering, Zhejiang University,  Hangzhou 310058, China;
2. Henan Electric Power Testing and Research Institute, Zhengzhou 450052, China
 全文: PDF  HTML
摘要:

为了研究输电塔横担在覆冰导线作用下的受力变形特征,以在冰灾发生时横担严重破坏的某转角耐张塔为对象,按照模型相似理论制作大比例节段模型,进行模拟导线重覆冰状态下的静力加载试验.考虑连接偏心、节点板厚度和螺栓长度等因素对构件传力路径的影响,建立中横担精细化有限元模型,对试验全程进行模拟并与试验对比.在此基础上通过非线性屈曲计算,获得覆冰导线静张力作用下横担的失效模式及薄弱位置.研究表明:横担主材两端螺栓分别连接在角钢的水平肢和竖直肢上会造成构件各个截面应力状态相差很大并使受压构件在局部位置产生受拉区域.对于斜材,连接偏心引起的弯矩和二阶效应不可忽略,且受压斜材是横担的薄弱环节,斜材稳定承载力的不足会导致横担的整体失效.

Abstract:

In order to study deformation mechanics and characteristics of cross arm of transmission tower under iced conductor, strain resistant corner tower segmental model with scale of 1∶4 was established on the basis of a typical tower whose cross arm was severely damaged during the ice disaster, and static experiment under tension of iced transmission line was conducted. The finite element model of middle cross arm was founded precisely taking into account the effects of connection eccentric, joint plate and the length of bolts on the force-transfer characteristic of members, then the whole test process was simulated and the results showed good agreements with the experimental value. Based on that, failure mode of cross arm was obtained by using the method of nonlinear bulking analysis. It is found that: at two ends of main member, the connection way of bolts installed in different legs  results in the stress of each cross-section varying greatly, and make compression member produce tensile stress in partial location. To diagonal member,  the bending moments caused by connection eccentric and second-order effects cant be neglected. Furthermore, the shortage of stable bearing capacity for compression diagonal member is the main reason for failure of cross arm.

出版日期: 2013-11-01
:  TU 279.7  
基金资助:

 国家自然科学基金资助项目(51178424).

作者简介: 楼文娟(1963-),女,教授,博导.主要从事结构风工程、钢和混凝土组合结构、结构在线健康监测和损伤识别等研究.E-mail:louwj@zju.edu.cn
服务  
把本文推荐给朋友
加入引用管理器
E-mail Alert
RSS
作者相关文章  

引用本文:

楼文娟,杨伦,陈勇,阎东. 覆冰导线静张力对输电塔横担的作用特征[J]. J4, 2013, 47(11): 1917-1925.

LOU Wen-Juan,YANG Lun,CHEN Yong,YAN Dong. Study on mechanical features of transmission tower cross arm under static tension of iced conductor. J4, 2013, 47(11): 1917-1925.

链接本文:

http://www.zjujournals.com/eng/CN/10.3785/j.issn.1008-973X.2013.11.005        http://www.zjujournals.com/eng/CN/Y2013/V47/I11/1917

[1] 陆佳政,蒋正龙,雷红才,等. 湖南电网2008年冰灾事故分析[J]. 电力系统自动化, 2008, 32(11): 16-19.
LU Jia-zheng, JIANG Zheng-long, LEI Hong-cai, et al. Analysis of Hunan power grid ice disaster accident in 2008[J]. Automation of Electric Power Systems, 2008, 32(11): 16-19.
[2] 李正,杨靖波,韩军科,等. 2008年输电线路冰灾倒塌原因分析[J]. 电网技术,2009, 33(2): 31-35.
LI Zheng, YANG Jing-bo, HAN Jun-ke, et al. Analysis on transmission tower toppling caused by icing disaster in 2008[J]. Power System Technology, 2009, 33(2): 31-35.
[3] 郑小尧,王新堂,王大尉,等. 2008年南方冰灾输电塔损毁原因调查与分析[J]. 宁波大学学报,2009,22(4):558-562.
ZHENG Xiao-yao , WANG Xin-tang , WANG Da-wei , et al. Analysis on causes leading to collapse of power transmission tower in 2008[J]. Journal of Ningbo University, 2009,22(4):558-562.
[4] 陆佳政,刘纯,陈红冬,等. 500kV输电塔线覆冰有限元计算[J]. 高电压技术,2007,33(10):167-169.
LU Jia-zheng, LIU Chun, CHEN Hong-dong,et al. Finite element calculation of 500kV iced power transmission system[J]. High Voltage Engineering, 2017, 33(10): 167-169.
[5] 秦佳俊,柴维斯,李永航. 输电塔覆冰倒塔的屈曲分析[J]. 广东工业大学学报,2011,28(2):27-30.
QIN Jia-jun, CHAI Wei-si, LI Yong-hang. Buckling analysis of instablility of icing transmission towers [J]. Journal of Guangdong University of Technology, 2011,28(2):27-30.
[6] 田琪凌,伋雨林,陈振,等. 500kV输电塔承载能力分析及优化设计[J]. 华中科技大学学报,2010,27(1):64-69.
TIAN Qi-ling , JI Yu-lin, CHEN Zhen, et al. Analysis on the bearing capacity of 500kV overhead iced transmission tower and structural optimization [J].Journal of Huazhong University of Science and Technology, 2010, 27(1): 64-69.
[7] 李雪,李宏男,黄连壮. 高压输电线路覆冰倒塔非线性屈曲分析[J]. 振动与冲击,2009,28(5):111-114.
LI Xue,LI Hong-nan,HUANG Lian-zhuang. Nonlinear buckling analysis of collapsed steel tower for 220 kV Guajing Iced transmission line [J]. Journal of Vibration and Shock, 2009,28(5):111-114.
[8] 鞠彦忠,薛庆莲,熊心,等.输电塔在线路覆冰作用下的极限承载力分析[J].华东电力,2009,37(11):1838-1841.
JU Yan-zhong, XUE Qing-lian, XIONG Xin, et al. Ultimate load-carrying capacity of transmission towers under ice accretion [J]. East China Electric Power, 2009,37(11): 1838-1841.
[9] ALBERMANI F, KITIPORNCHAI S, CHAN R W K. Failure analysis of transmission towers[J]. Engineering Failure Analysis, 2009(16), 1922-1928.
[10]ALAM M J, SANTHAKUMAR A R. Reliability analysis and full-scale testing of transmission tower [J]. Journal of Structure Engineering, 1996, 122(3):33844.
[11]PRASADRAO N, SAMUELKNIGHT G M, MOHAN S J, et al. Studies on failure of transmission line towers intesting [J]. Engineering structures, 2012(35): 55-70.
[12]ALBERMANI F G A, KITIPORNCHAI S. Numerical simulation of structural behaviour of transmission towers[J]. Thin-Walled Structures, 2003(41): 167177.
[13]谢强,孙力,张勇. 500kV输电塔结构抗冰加固改造方法试验研究[J].中国电机工程学报,2011,31(16):108114.
XIE Qiang, SUN Li, ZHANG Yong. Experimental Study on Retrofitting of 500 kV transmission tower against ice load [J]. Proceedings of The Chinese Society for Electrical Engineering, 2011,31(16):108-114.
[14]XIE Q, SUN L. Failure mechanism and retrofitting strategy of transmission rower structures under ice load [J]. Journal of Constructional Steel Research, 2012(74): 26-36.
[15]谢强,孙力,林韩,等. 500kV输电杆塔结构抗风极限承载力试验研究[J]. 高电压技术,2012,38(3):712-719.
XIE Qiang, SUN Li, LIN Han, et al. Experimental study on wind-resistant ultimate load-carrying capacity of 500kV transmission tower [J]. High Voltage Engineering, 2012, 38(3): 712-719.
[16]MOON B W, PARK J H, LEE S K, et al. Performance evaluation of a transmission tower by substructure test [J]. Journal of Constructional Steel Research, 2009(65): 1-11.
[17]徐芝纶.弹性力学简明教程[M].北京:高等教育出版社,2006:21-23.

No related articles found!