中国电力 ›› 2016, Vol. 49 ›› Issue (2): 31-35.DOI: 10.11930/j.issn.1004-9649.2016.02.031.05

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输电铁塔十字组合角钢构件换算长细比推导

韩军科1,李正1,张春蕾2,刘海峰1   

  1. 1.中国电力科学研究院,北京 100192;
    2.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:2015-11-08 出版日期:2016-02-18 发布日期:2016-03-21
  • 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。E-mail: hjkepri@126.com
  • 基金资助:
    国家自然科学基金资助项目(51178014、51408569);国家电网公司科技资助项目(GC7114039)

Derivation of Equivalent Slenderness Ratio of Cruciform Angle Section Members in Transmission Towers

HAN Junke1, LI Zheng1, ZHANG Chunlei2, LIU Haifeng1   

  1. 1. China Electric Power Research Institute, Beijing 100192, China;
    2. North China Power Engineering Co., Ltd of China Power Engineering Consulting Group, Beijing 100120, China
  • Received:2015-11-08 Online:2016-02-18 Published:2016-03-21
  • Supported by:
    This work is supported by National Natural Science of Foundation of China (No. 51408568).

摘要: 以输电铁塔十字组合角钢构件为研究对象,在轴心受压构件弹性弯曲屈曲理论基础上,提出了考虑剪力影响的压杆临界力的换算长细比。采用填板通过螺栓连接的十字组合角钢分别简化为刚接和铰接模型,根据分肢的变形,推导出2种计算模型绕虚轴的换算长细比。根据输电铁塔中十字组合角钢的实际布置和构造形式,推导了十字组合绕虚轴换算长细比计算公式。采用有限元方法,对十字组合角钢分肢间隙对屈曲承载力的影响进行了分析,提出了十字组合角钢绕虚轴换算长细比计算公式。

关键词: 输电铁塔, 十字组合角钢构件, 剪力影响, 换算长细比, 计算模型

Abstract: Based on elastic bending buckling theory of axial compression components, the equivalent slenderness ratio of compression components in transmission tower cruciform angle section with considering of shearwas effects is calculated. Cruciform anglebolted by filler plate is simplified as fixed and pinned connection model. According to limb deformation, the equivalent slenderness ratio of virtual axis are deduced. In accordance with actual layout and connections of cruciform angles in transmission towers, formulas of equivalent slenderness ratio related to virtual axis of cruciform angle are derived. Finite element method is used to analyze effect of cruciform angle limb clearance on buckling bearing capacity.

Key words: transmission tower, cruciform angle section members, shear effect, equivalent slenderness ratio, calculation model

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