Crack Strength and Deformability of Power Transmission Line Conical Poles

Abstract:

Numeral experiments to study influence on design strength of conical poles, limitations of crack width and breaking strain have been conducted. The analysis of influence on conical poles crack strength and deformability and relation between areas of prestressing steel and total area of steel (A_sp/A_s,tot) has been performed. Research has revealed that dependence of crack width on relation between A_sp/A_s,tot for all types of conical poles is close to linear. Percentage of reinforcement μ_{s, tot} % does not influence this dependence. A moment of force increase caused by vertical load M_v/M leads to a significant increase of crack width. Presence of prestressing steel (A_sp/A_s,tot) has the greatest influence on the deflection of conical poles. Still total percentage of reinforcement has little influence on a type of function f_пр=f (A_sp/A_s,tot). Calculations of poles made according to a strain pattern showed that regulations understate approximate value of deflection. For that reason, it is advisable to make calculations of poles CONS22, CONS26 according to a strain patter.

• Periodical: Materials Science Forum (Volume 931)
• Pages: 304-310
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.931.304
• Online since: September 2018
• Authors: Alina S. Nasevich*, Victor L. Shchutskiy, Sergey Stel'makh, Oleg V. Antipov
• Keywords: Annular Section, Crack Strength, Deformability, Design Strength of Structure, Prestressing, Reinforced Concrete Construction

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