Pushover Analysis and Partially Scaled Model Test Verification for Evaluating the Wind-Resistant Performance of an Existing 154kV Transmission Tower

Gil-Young Chung; Gi-Bae Kim; Hyung-Kui Park; Soo-Hyuk Chang

doi:10.7734/COSEIK.2025.38.6.389

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2025 Vol.38, Issue 6 Preview Page Next Page

Research Paper

Pushover Analysis and Partially Scaled Model Test Verification for Evaluating the Wind-Resistant Performance of an Existing 154kV Transmission Tower 기설 154kV 송전철탑의 내풍성능 평가를 위한 Pushover 해석 및 부분축소모형 실험 검증

31 December 2025. pp. 389-396

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Abstract

This study evaluated the structural performance of a 154kV straight-type transmission tower susceptible to strong winds. Previous studies have shown that transmission towers are more vulnerable under 45° wind than under frontal wind, and this condition was considered in the analysis. A pushover analysis of the full-scale tower was conducted using ABAQUS to identify critical members under extreme wind. Based on the results, a half-scale model with bearing- and friction-type bolted connections was fabricated. Two actuators were used to reproduce the horizontal forces and bending moments from the full-scale analysis in accordance with similarity laws. Tests showed that increasing bolt pretension reduced the yield displacement by about 30%, while the yield load remained nearly unchanged. For friction-type connections, differences in yield load and displacement between analysis and experiment were within 5%, confirming the reliability of the pushover analysis. Future work will propose reinforcement strategies for critical members and verify their effectiveness through scaled-model tests to improve wind and seismic resistance.

Keywords

154kV transmission tower

pushover analysis

partially scaled model experiment

bolt pretension

yield load

yield displacement

본 연구는 강풍에 취약한 설비로 선정된 154kV 직선형 송전철탑을 대상으로 극한 풍하중에 대한 구조 성능을 검토하였다. 선행연구에 따르면 송전철탑은 정면풍보다 45° 풍향에서 더 취약한 거동을 보이며, 이를 고려하여 ABAQUS를 이용한 Pushover 해석을 수행하였다. 극한 풍속 조건에서의 취약 부재와 거동 특성을 분석한 후, 길이 차원에서 1/2 상사율을 적용한 부분축소모형을 제작하였으며, 지압이음 조건과 마찰이음 조건으로 구분하였다. 또한 두 대의 가력기를 이용해 전체모델에서 산정된 수평력과 휨모멘트를 상사법칙에 따라 재현하였다. 실험 결과, 볼트 체결력을 향상시킨 경우 항복변위는 약 30% 감소했으나 항복하중에는 큰 차이가 없었다. 특히 마찰이음 조건에서는 해석과 실험의 항복하중 및 항복변위가 모두 5% 이내의 오차를 보여 Pushover 해석의 신뢰성이 검증되었다. 향후 연구에서는 주요 부재의 보강 방안을 수립하고, 보강된 부분축소모형 실험을 통해 내풍 및 내진 성능 향상을 검증할 예정이다.

키워드

154kV 송전철탑

Pushover 해석

부분축소모형 실험

볼트 체결력

항복하중

항복변위

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Information

Publisher :Computational Structural Engineering Institute of Korea
Publisher(Ko) :한국전산구조공학회
Journal Title :Journal of the Computational Structural Engineering Institute of Korea
Journal Title(Ko) :한국전산구조공학회 논문집
Volume : 38
No :6
Pages :389-396
Received Date : 2025-09-15
Revised Date : 2025-10-16
Accepted Date : 2025-10-22
DOI :https://doi.org/10.7734/COSEIK.2025.38.6.389

Journal of the Computational Structural Engineering Institute of Korea ISSN:1229-3059(Print) 2287-2302(Online) 한국전산구조공학회 논문집

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