带预应力套箍的避雷针法兰节点抗风性能研究

彭生江; 张广平; 王秀丽; 魏建民; 张富平; 朱中城

doi:10.13204/j.gyjzG21053120

带预应力套箍的避雷针法兰节点抗风性能研究

doi: 10.13204/j.gyjzG21053120

1. 国网甘肃省电力公司建设分公司, 兰州 730050;
2. 中国能源建设集团甘肃省电力设计院有限公司, 兰州 730050;
3. 兰州理工大学土木工程学院, 兰州 730050;
4. 西部土木工程防灾减灾教育工程研究中心, 兰州 730050

基金项目:

国家自然科学基金（51778273）；甘肃省建设科技攻关项目（JK2020-26）

详细信息

作者简介:
彭生江,男,1975年出生,博士研究生,教授级高级工程师

通讯作者:
王秀丽,女,博士,教授,1135739056@qq.com。

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- 被引次数: 0
出版历程
- 收稿日期: 2021-05-31
- 网络出版日期: 2022-02-21

RESEARCH ON WIND RESISTANCE OF FLANGE JOINTS OF LIGHTNING ROD WITH PRESTRESSED HOOPS

1. State Grid Gansu Electric Power Company, Lanzhou 730050, China;
2. China Energy Engineering Group, Gansu Electric Power Design Institute Co., Ltd., Lanzhou 730050, China;
3. School of Civil Engineering, Lanzhou University of Technology, Lanzhou 730050, China;
4. Western Center of Disaster Mitigation of Ministry of Education, Lanzhou 730050, China

摘要

摘要: 针对输电塔避雷针破坏问题，基于减小高强螺栓应力幅值及节点双重防护的理念提出了避雷针与输电塔结构之间的新型连接方式，即钢绞线加强法兰节点。利用有限元软件WORKBENCH建立了有限元模型，研究了钢绞线预拉力20 kN、不同风速下两种避雷针的应力与位移，分别以风速5，15，30，50 m/s为参数，分析流体对避雷针结构的压应力云图、流线矢量图、应力及位移值。并对不同荷载工况下避雷针的应力响应及位移响应与实测值进行对比。结果表明：在相同风速荷载作用下，避雷针受到流体压强相同，且避雷针与人字柱连接处应力最大；与常规的连接方式相比，新型连接方法能显著降低顶部位移，有效降低连接螺栓的应力峰值，保证避雷针安全使用，且风速越大，效果越明显。
- 避雷针法兰节点 /
- 抗风性能 /
- CFD /
- 钢绞线加强 /
- 数值模拟
Abstract: For the failure of lightning rod in transmission tower, an innovation connection between the lighting rod and the transmission tower was proposed based on the concept of reducing the stress amplitude of high-strength bolts and realizing double protection, namely steel strand reinforced flange joint. The finite element model was established by using the finite element software WORKBENCH. The stress and displacement were studied on two kinds of joints for lightning rods at different wind speeds and steel strand pretensions of 20 kN. The stress nephogram, streamline vector diagram,stress and displacement response of the lightning rod structure caused by fluid were expressed under the wind velocity of 5 m/s,15 m/s,30 m/s, and 50 m/s. The contrastive analysis was carried on the stress and displacement response of the lightning rod with the measured values under different loading conditions. The analysis results showed that the lightning rod was subjected to the same fluid pressure under the same load. The stress was the largest at the connection between the lightning rod and the herringbone column. The research results showed that the new lightning rod could significantly reduce the peak values compared with the conventional lightning rod. It was more effectively in reducing the stress peak values on the connecting bolts so as to ensure the safe use of the lightning rod. The higher the wind speed, the more obvious the effect.
- flange joint of lightning rod /
- wind resistance /
- CFD /
- steel strand reinforcement /
- numerical simulation

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参考文献(17)

[1]	刘冉.基于双向流固耦合的变电构架避雷针结构风振响应分析[D].郑州:郑州大学, 2019.
[2]	WANG Y Q, ZONG L, SHI Y J.Bending Behavior and Design Model of Bolted Flange-Plate Connection[J].Journal of Constructional Steel Research, 2013, 84:1-16.
[3]	BLACHOWSKI B, GUTKOWSKI W.Effect of Damaged Circular Flange-Bolted Connections on Behaviour of Tall Towers, Modelled by Multilevel Substructuring[J].Engineering Structures, 2016, 111:93-103.
[4]	ABID M, CHATTHA J A, KHAN K A.Finite Element Analysis of a Gasketed Flange Joint Under Combined Internal Pressure and Thermal Transient Loading[C]//ASME 2007 Pressure Vessels and Piping Conference.American Society of Mechanical Engineers Digital Collection, 2007:261-267.
[5]	PARNAUDEAU P, CARLIER J, HEITZ D, et al.Experimental and Numerical Studies of the Flow Over a Circular Cylinder at Reynolds Number 3900[J].Physics of Fluids, 2008, 20(8):85-101.
[6]	MARA T G, HONG H P.Effect of Wind Direction on the Response and Capacity Surface of a Transmission Tower[J].Engineering Structures, 2013, 57:493-501.
[7]	YANG S C, HONG H P.Nonlinear Inelastic Responses of Transmission Tower-Line System Under Downburst Wind[J].Engineering Structures, 2016, 123:490-500.
[8]	ZHANG J, XIE Q.Failure Analysis of Transmission Tower Subjected to Strong Wind Load[J].Journal of Constructional Steel Research, 2019, 160:271-279.
[9]	陈文礼, 李惠.基于RANS的圆柱风致涡激振动的CFD数值模拟[J].西安建筑科技大学学报(自然科学版), 2006(4):509-513.
[10]	董国朝.钝体绕流及风致振动流固耦合的CFD研究[D].长沙:湖南大学, 2012.
[11]	徐枫.结构流固耦合振动与流动控制的数值模拟[D].哈尔滨:哈尔滨工业大学, 2009.
[12]	宋群群.输电线的流固耦合振动数值分析[D].重庆:重庆大学, 2014.
[13]	变电站钢结构变截面避雷针涡振现象及现场措施分析[J].科技创新与应用, 2016(28):199-200.
[14]	邵波, 罗烈, 张广平, 等.基于CFD的750 kV变电构架单钢管避雷针结构绕流分析[J].特种结构, 2019, 36(5):88-96.
[15]	洪成, 上官之政, 杨雄, 等.基于CFD的避雷针塔风速流场数值模拟[J].南昌工程学院学报, 2019, 38(1):50-55.
[16]	曾德伟.新型锻造法兰节点受力性能研究[D].武汉:武汉大学, 2013.
[17]	李文侠.加强型泥石流柔性防护体系抗冲击性能研究[D].兰州:兰州理工大学, 2016.