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Volume 59 Issue 3
Jun.  2024
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Journal of Southwest Jiaotong University  > 2024  >  59(3): 712-719.
CHEN Minwu, TIAN Hang, SONG Yalin, CHEN Ling. Reliability Optimization of Co-phase Power Supply Device Based on Frequency Conversion Control Strategy[J]. Journal of Southwest Jiaotong University, 2020, 55(1): 9-17. doi: 10.3969/j.issn.0258-2724.20180668
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
shu

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

doi: 10.3969/j.issn.0258-2724.20220573
  • 1.

    Southwest Electric Power Design Institute Co., Ltd. of China Power Engineering Consulting Group, Chengdu 610010, China

  • 2.

    College of Civil Engineering, Chongqing University, Chongqing 400045, China

  • 3.

    Key Laboratory of New Technology for Construction of Cities in Mountain Area of Ministry of Education Chongqing University, Chongqing 400045, China

  • Received Date: 23 Aug 2022
  • Rev Recd Date: 28 Jan 2023
    • Available Online: 08 Jan 2024
  • Publish Date: 17 Mar 2023
    Abstract

  • In order to study the calculation method of the compression bearing capacity of the inclined members of the transmission tower with joint constraints, the failure mode, bearing capacity, and deformation form of the arranged minimum axis and parallel axis of 120 equal angle steels were obtained through eccentric compression bearing capacity tests. In addition, the influence of different joint stiffness and joint types on their bearing capacity was studied. Combined with the current industry specifications, the calculation formula of the slenderness ratio of inclined members of transmission towers is proposed for different joint types (A, B, C). The results show that when the slenderness ratio is less than 120, the bearing capacity of the member is mainly controlled by eccentricity. A larger eccentricity indicates a lower bearing capacity. When the slenderness ratio is greater than 120, the bearing capacity of the member is mainly controlled by the joint stiffness. Larger joint stiffness indicates higher bearing capacity. A and C joint types have their own advantages at different slenderness ratios, but the bearing capacity of B joint type is always lower than that of A and C joint types. There is a great deviation between the calculated value of Chinese and foreign codes and the test value, and these codes have certain limitations, which are reflected in the insufficient eccentricity correction of small slenderness ratio members and insufficient joint stiffness correction of large slenderness ratio members. The calculation results of the proposed modified formula for slenderness ratio of inclined members are in good agreement with the test results and can be used to guide the engineering design.

     

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