典型格构式结构风荷载及风致响应规范比较

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振动与冲击 ›› 2015, Vol. 34 ›› Issue (6) : 140-145.

论文

典型格构式结构风荷载及风致响应规范比较

对国内外四种常见格构式结构荷载规范中风荷载计算方法、关键参数取值等进行详细对比分析，以典型500 kV单回路酒杯型输电塔为例，将规范计算所得风荷载与风洞测力试验所测风荷载进行比较，计算结构的风致响应。对比分析发现，相同条件下（50年重现期）不同规范对同一输电塔结构的等效风荷载存在一定差异。随节段高度增加，我国规范GB50545的等效静力风荷载偏大。据规范计算所得风致响应值与据测力风洞试验计算结果吻合较好。由于我国规范未考虑重现期对线路影响，随线路安全等级提高，其等效静力风荷载可能会不安全。

作者信息 +

Wind loads and wind-induced responses comparison of typical lattice structures based on various codes

The guidelines and procedures about wind load of transmission tower in IEC60826; BS EN 50341; ASCE No.74 and GB50545 are introduced and compared in detail. And taking a typical 500kV single-circuit transmission tower as an example, the difference of wind loads acting on the transmission tower based on various codes are compared with the results tested in the wind tunnel using high-frequency-force-balance technique. Then, the wind-induced responses of the typical transmission tower based on codes and wind tunnel test are computed and analyzed. The results show that the wind loads based on different codes for same transmission tower have some different under the same calculating conditions. With the increasing of section height of the transmission tower, the equivalent static wind loads (ESWLs) based on GB50545 are larger than other codes. The response of typical 500kV transmission tower based on wind tunnel test is similar to the codes. In addition, because GB50545 fails to consider the influence of different return periods, GB50545 could induce unsafe situation with the increased of security levels of transmission lines.

Author information +

文章历史 +

摘要

对国内外四种常见格构式结构荷载规范中风荷载计算方法、关键参数取值等进行详细对比分析，以典型500 kV单回路酒杯型输电塔为例，将规范计算所得风荷载与风洞测力试验所测风荷载进行比较，计算结构的风致响应。对比分析发现，相同条件下（50年重现期）不同规范对同一输电塔结构的等效风荷载存在一定差异。随节段高度增加，我国规范GB50545的等效静力风荷载偏大。据规范计算所得风致响应值与据测力风洞试验计算结果吻合较好。由于我国规范未考虑重现期对线路影响，随线路安全等级提高，其等效静力风荷载可能会不安全。

Abstract

The guidelines and procedures about wind load of transmission tower in IEC60826; BS EN 50341; ASCE No.74 and GB50545 are introduced and compared in detail. And taking a typical 500kV single-circuit transmission tower as an example, the difference of wind loads acting on the transmission tower based on various codes are compared with the results tested in the wind tunnel using high-frequency-force-balance technique. Then, the wind-induced responses of the typical transmission tower based on codes and wind tunnel test are computed and analyzed. The results show that the wind loads based on different codes for same transmission tower have some different under the same calculating conditions. With the increasing of section height of the transmission tower, the equivalent static wind loads (ESWLs) based on GB50545 are larger than other codes. The response of typical 500kV transmission tower based on wind tunnel test is similar to the codes. In addition, because GB50545 fails to consider the influence of different return periods, GB50545 could induce unsafe situation with the increased of security levels of transmission lines.

导出引用

张庆华1,2，顾明2. 典型格构式结构风荷载及风致响应规范比较[J]. 振动与冲击, 2015, 34(6): 140-145

ZHANG Qing-hua 1,2，GU Ming 2. Wind loads and wind-induced responses comparison of typical lattice structures based on various codes[J]. Journal of Vibration and Shock, 2015, 34(6): 140-145

参考文献

[1] 陈鹏云,曹波,罗弦,等. 中国电网主要自然灾害运行数据及特征分析[J]. 中国电力, 2014, 47(7): 57-61.
CHEN Peng-yun, CAO Bo, LUO Xian, et al. Operation data and feature analysis of the main natural disasters of power network in china [J]. Electric Power,2014, 47(7): 57-61.
[2] 张明旭,康淑丰,梁利辉. 超高压输电线路典型故障分析及防范措施[J]. 河北电力技术, 2014, 33(1): 37-39.
ZHANG ming-xu, KANG Shu-feng, LIANG li-hui. Primary fault analysis and control measures on ehv transmission lines[J]. HeiBei Electric Power, 2014, 33(1): 37-39.
[3] Dan D, Brian W H. Winds wreak havoc on lines [J]. Transmission &Distribution World, 1996, 48(6): 32-42.
[4] GB50545-2010,110～750 kV 架空输电线路设计规范[S].
[5] CEI/IEC 60826:2003,Design criteria of overhead transmission lines [S].
[6] BS EN 50341-1:2012,Overhead electrical lines exceeding AC 1kV- part 1: general requirements-common specifications[S].
[7] ASCE manuals and reports on engineering practice No.74, guidelines for electrical transmission line structural loading (third editon) [S]. 2009.
[8] 张庆华,顾明,黄鹏. 500 kV单回路输电塔塔头风荷载计算模型研究[J]. 振动与冲击, 2009, 28(12): 151-154.
ZHANG Qing-hua, GU Ming, HUANG Peng. Mathematical models study of wind load on superstructures of 500 kV single-circuit transmission tower [J]. Journal of Vibration and Shock, 2009, 28(12): 151-154.
[9] 张庆华,顾明,黄鹏. 格构式塔架风力特性试验研究[J]. 振动与冲击, 2009, 28(2): 1-4.
ZHANG Qing-hua, GU Ming, HUANG Peng. Experimental study of wind force on latticed tower [J]. Journal of Vibration and Shock, 2009, 28(2): 1-4.
[10] 张庆华,顾明,黄鹏. 典型输电塔塔头风力特性试验研究[J]. 振动工程学报, 2008, 21(5): 452-457.
ZHANG Qing-hua, GU Ming, HUANG Peng. Experiment on wind force on typical superstructures of latticed transmission tower [J]. Journal of Vibration Engineering, 2008, 21(5): 452- 457.
[11] 张庆华,顾明. 基于高频天平测力试验的500 kV单回路输电塔风致响应研究[J]. 振动与冲击, 2014, 33(4): 156-160.
ZHANG Qing-hua, GU Ming. Wind-induced response of 500 kV single-circuit transmission tower based on high frequency force balance tests [J]. Journal of Vibration and Shock, 2014, 33(4): 156-160.
[12] GB 50009-2001,建筑结构荷载规范(2006版)[S]. 北京: 中国建筑工业出版社, 2006.
[13] 黄本才. 结构抗风分析原理及应用(2版) [M]. 上海: 同济大学出版社, 2008.
[14] 张庆华. 典型输电塔风荷载及效应研究[D]. 上海: 同济大学, 2011.