Research on the Bearing Capacity of High-Strength Steel Tubular H-Joints in High-Voltage Transmission Lines

Abstract:

The steel tube-plate joints are widely applied in tall-slender tower of transmission line engineering,but there are few studies at home and abroad. In this paper,experimental study with full-scale model and analysis based on FEM were carried out on the ultimate bearing capacity of typical h-joints , and the results showed that the bending moment was transferred to the chord from the ear-plate of a narrow area, which led to local buckling on the chord wall , so the local strength of chord is one of the most important control factors in the design of this typical joint;thus the bearing capacity can improve by enhancing the strength of steel or increasing the thickness of ear-plate. In view of the phenomenon that stress concentration is easy to emerge at the intersection of the steel tube-plate joints, some improvement measures for the connections are put forward,such as adding outer half-ring stiffening plates , adding outer-ring plates , adding inner-ring plates, and revising ear-plates to smooth the concave angle , etc.

• Periodical: Applied Mechanics and Materials (Volumes 513-517)
• Pages: 4123-4126
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.513-517.4123
• Online since: February 2014
• Authors: Yun Xu*
• Keywords: Ear-Plate, FEM Analysis, High Strength Steel (HSS), H-Joint, Steel Tubular Tower

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