Biaxial Loading Capacity of H-Type Reinforced Concrete Electric Poles

Document Type : Regular Paper

Authors

1 Associate Professor, Department of Civil Engineering, Yazd University, Yazd, Iran

2 Research Associate, Department of Civil Engineering, Yazd University, Yazd, Iran

3 Ph.D. Candidate, Department of Civil Engineering, Yazd University, Yazd, Iran

4 Senior Engineer, Division of Engineering & Supervision, Yazd Electrical Distribution Company, Yazd, Iran

Abstract

H-type reinforced concrete poles are nowadays widely used as an economical and cost-effective substitute for wooden poles in power transmission lines. Although these poles are frequently subjected to biaxial loading in real field application, their biaxial interaction curves yet await detailed investigation. The current study was aimed at developing the biaxial bending interaction curves for H-type utility poles considering the measurements stipulated by the relevant standards and codes. Towards this, two commonly used H-type electric poles (i.e., 9 and 12 m ones with a normal strength of 400 kgF) were constructed, cured, and loaded at angles of 0, 30, 60, and 90 degrees with respect to their minor principal axes. The experimental results were described in terms of load-displacement curves, developed strains, cracking pattern, failure modes, and biaxial loading interaction curve. The obtained interaction diagrams can be reliably used to estimate the loading capacity of electric poles under biaxial loading in real field applications.

Highlights

  • Bi-axial bending interaction curves are developed for the H-type concrete poles.
  • The pole specimens are loaded according to the related standards.
  • The results are discussed in terms of the load-displacement curves and failure modes.

Keywords

Main Subjects

References

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History

  • Receive Date: 16 April 2023
  • Revise Date: 17 May 2023
  • Accept Date: 04 July 2023

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