不同规范的输电铁塔压杆局部稳定强度折减系数对比

doi:10.11930/j.issn.1004-9649.2013.12.1.4

中国电力 ›› 2013, Vol. 46 ›› Issue (12): 1-5.DOI: 10.11930/j.issn.1004-9649.2013.12.1.4

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不同规范的输电铁塔压杆局部稳定强度折减系数对比

韩军科^{1, 2}, 张春蕾³, 李振宝¹

1. 北京工业大学工程抗震与结构诊治北京市重点实验室,北京 100124; 2. 中国电力科学研究院,北京 100192; 3. 中国电力工程顾问集团华北电力设计院工程有限公司,北京 100120

收稿日期:2013-08-02 出版日期:2013-12-23 发布日期:2015-12-10
作者简介:韩军科（1979—）,男,山东威海人,博士研究生,高级工程师,一级注册结构工程师,从事输电线路杆塔结构分析与控制研究。
基金资助:
国家自然科学基金资助项目（51178014）; 国家电网公司科技资助项目（GY110025）

Comparison of Strength Reduction Factor Caused by Local Stability of Axial Compressive Members of Transmission Towers in Design Codes

HAN Jun-ke^{1, 2}, ZHANG Chun-lei³, LI Zhen-bao¹

1. Beijing Key Laboratory of Earthquake Engineering and Structural Retrofit, Beijing University of Technology, Beijing 100124, China; 2. China Electric Power Research Institute, Beijing 100192, China; 3. North China Power Engineering Co., Ltd., China Power Engineering Consulting Group, Beijing 100120, China

Received:2013-08-02 Online:2013-12-23 Published:2015-12-10

摘要/Abstract

摘要： 以输电铁塔轴心受压构件局部稳定的强度折减系数为研究对象,对美国铁塔设计导则（ASCE 10-97）,英国铁塔设计规范（BS 8100-3）,欧洲45 kV以上架空输电线路设计规范（EN 50431-1）中关于轴心受压构件的强度折减系数规定进行了介绍,并与中国架空输电线路杆塔结构设计技术规定（DL/T 5154）的折减系数进行对比分析。结果表明：ASCE 10-97和DL/T 5154规范宽厚比的计算采用自由外伸宽度与厚度的比值,BS 8100-3和EN 50431-1规范采用整个肢宽与厚度的比值;DL/T 5154考虑局部稳定的强度折减是对钢材设计强度的折减,ASCE 10-97、BS 8100-3、EN 50431-1是对钢材屈服强度的折减; 对于热轧角钢的强度折减系数,DL/T 5154最大,ASCE 10-97次之,EN 50431-1再次之,BS 8100-3最小。

关键词: 输电铁塔, 轴心受压构件, 局部稳定, 强度折减系数, 设计规范

Abstract: By taking the strength reduction factor caused by local stability of axial compressive members of transmission tower as the research object, this paper introduces the strength reduction factors of axial compressive members specified respectively in the standards of Design of latticed steel transmission structures ASCE10-97, Lattice towers and masters BS 8100-3 and Overheard electrical lines exceeding AC 45kV EN 50431-1, and makes a comparison with the Technical regulation for design of tower and pole structures of overhead transmission line DL/T 5154. The results show that: the ratio of b/t is determined by the flat width divided by the thickness of leg in DL/T 5154 and ASCE 10-97, while in BS 8100-3 and EN 50431-1 it is determined by the ratio of the nominal width and thickness of leg; the strength reduction factor with consideration of local stability is determined by reducing the design stress of steel in DL/T 5154, while in ASCE10-97, BS 8100-3 and EN 50431-1 it is determined by reducing the minimum yield stress of steel; the strength reduction factor of the hot rolled angle section members is largest in DL/T 5154, second in ASCE10-97, third in EN 50431-1 and smallest in BS 8100-3.

Key words: transmission towers, axial compressive members, local stability, strength reduction factor, design codes

中图分类号:

TM614

韩军科, 张春蕾, 李振宝. 不同规范的输电铁塔压杆局部稳定强度折减系数对比[J]. 中国电力, 2013, 46(12): 1-5.

HAN Jun-ke, ZHANG Chun-lei, LI Zhen-bao. Comparison of Strength Reduction Factor Caused by Local Stability of Axial Compressive Members of Transmission Towers in Design Codes[J]. Electric Power, 2013, 46(12): 1-5.

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不同规范的输电铁塔压杆局部稳定强度折减系数对比

Comparison of Strength Reduction Factor Caused by Local Stability of Axial Compressive Members of Transmission Towers in Design Codes

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不同规范的输电铁塔压杆局部稳定强度折减系数对比

Comparison of Strength Reduction Factor Caused by Local Stability of Axial Compressive Members of Transmission Towers in Design Codes

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