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输电塔斜材不同节点型式下的受压承载力

鄢秀庆 何松洋 李正良 韩大刚 高见 刘红军

鄢秀庆, 何松洋, 李正良, 韩大刚, 高见, 刘红军. 输电塔斜材不同节点型式下的受压承载力[J]. 西南交通大学学报, 2024, 59(3): 712-719. doi: 10.3969/j.issn.0258-2724.20220573
引用本文: 鄢秀庆, 何松洋, 李正良, 韩大刚, 高见, 刘红军. 输电塔斜材不同节点型式下的受压承载力[J]. 西南交通大学学报, 2024, 59(3): 712-719. doi: 10.3969/j.issn.0258-2724.20220573
YAN Xiuqing, HE Songyang, LI Zhengliang, HAN Dagang, GAO Jian, LIU Hongjun. Compression Bearing Capacity of Inclined Members of Transmission Tower with Different Joint Types[J]. Journal of Southwest Jiaotong University, 2024, 59(3): 712-719. doi: 10.3969/j.issn.0258-2724.20220573
Citation: YAN Xiuqing, HE Songyang, LI Zhengliang, HAN Dagang, GAO Jian, LIU Hongjun. Compression Bearing Capacity of Inclined Members of Transmission Tower with Different Joint Types[J]. Journal of Southwest Jiaotong University, 2024, 59(3): 712-719. doi: 10.3969/j.issn.0258-2724.20220573

输电塔斜材不同节点型式下的受压承载力

doi: 10.3969/j.issn.0258-2724.20220573
基金项目: 国家自然科学基金(51508054)
详细信息
    作者简介:

    鄢秀庆(1984—) ,男,高级工程师,研究方向为送电结构设计,E-mail:64732264@qq.com

  • 中图分类号: TM753;TM721.1

Compression Bearing Capacity of Inclined Members of Transmission Tower with Different Joint Types

  • 摘要:

    为研究节点约束下输电塔斜材受压承载力的计算方法,通过对120根等边角钢的偏心受压承载力试验,分析其最小轴、平行轴布置时的破坏模式、承载力及变形形态,研究不同约束刚度、节点型式对其承载力的影响;结合现行行标公式,针对不同节点连接型式(A、B、C类),提出输电塔斜材受压长细比的计算公式. 研究结果表明:长细比小于120时,构件承载力主要受偏心控制,偏心越大,承载力越低;而长细比大于120时,构件承载力主要受约束刚度控制,约束刚度越大,承载力越高;A、C类连接在不同长细比时各具优势,但B类连接的承载力始终低于A、C类连接;国内外规范计算值与试验值均存在较大的偏差,具有一定的局限性,体现在小长细比构件偏心及大长细比构件约束修正不足等方面;所提出长细比修正公式的计算结果与试验结果吻合良好,可用于指导工程设计.

     

  • 图 1  带弹簧的半刚性支座

    Figure 1.  Semi-rigid support with spring

    图 2  端部约束示意

    Figure 2.  End restraint

    图 3  加载装置示意

    Figure 3.  Test setup

    图 4  测点布置

    Figure 4.  Layout of monitoring points

    图 5  跨中截面荷载-侧向位移曲线

    Figure 5.  Load–lateral displacement curves of mid-span section

    图 6  ∟BK2-100、∟BK3-100荷载-响应曲线

    Figure 6.  Load–response curves of∟BK2-100 and ∟BK3-100

    图 7  试件失效模式

    Figure 7.  Failure modes of specimens

    图 8  A类连接不同约束刚度时的承载力曲线

    Figure 8.  Bearing capacity curves of A joint type with different joint stiffnesses

    图 9  不同约束刚度时的承载力曲线

    Figure 9.  Bearing capacity curves under different joint stiffnesses

    图 10  最小轴布置时的承载力对比曲线

    Figure 10.  Comparison curves of bearing capacity of arranged minimum axis

    图 11  平行轴布置不同连接时承载力对比曲线

    Figure 11.  Comparison curves of bearing capacity of arranged parallel axis with different joint types

    图 12  最小轴布置试验值与修正值承载力对比

    Figure 12.  Comparison of test and corrected bearing capacity of arranged minimum axis

    图 13  最小轴布置稳定系数对比曲线

    Figure 13.  Comparison curves of stability coefficient of arranged minimum axis

    图 14  修正后承载力与试验值对比

    Figure 14.  Comparison of test and corrected bearing capacity

    图 15  修正前、后稳定系数对比

    Figure 15.  Comparison of stability coefficient before and after correction

    表  1  试验构件信息

    Table  1.   Information of experimental members

    试验构件
    编号
    布置
    型式
    角钢尺
    寸/mm
    斜材长细比
    ∟AK2-λ最小轴∟80×760、80、100、130、160
    ∟AK1-λ平行轴∟80×780、100、120、150、180
    ∟AK2-λ平行轴∟80×780、100、120、150、180
    ∟AK3-λ平行轴∟80×780、100、120、150、180
    ∟BK2-λ平行轴∟80×780、100、120、150、180
    ∟BK3-λ平行轴∟80×780、100、120、150、180
    ∟CK2-λ平行轴∟80×780、100、120、150、180
    ∟CK3-λ平行轴∟80×780、100、120、150、180
    注:试验件编号∟AK2-λ中,A为节点形式,K2为约束刚度,λ为试验构件长细比值,其余编号类似,K1、K2、K3分别代表刚度为0、50、100 kN·m/rad.
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出版历程
  • 收稿日期:  2022-08-23
  • 修回日期:  2023-01-28
  • 网络出版日期:  2024-01-08
  • 刊出日期:  2023-03-17

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